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ZES Sensors and Accessories

1. 20 5 605 EFI 120 bG 150 170 Figure 81 Dimensions of the L50 Z29 Hall2000 to LMG500 HDSUBI5 ta LMG4500 ZES ZIMMER 116 218 Sensors and Accessories for precision power meters Current sensors 2 26 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Do not overload any current sensor with more than the measurable TRMS value Please refer to chapter 1 1 Safety precautions 2 26 2 Specifications and accuracies Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the hall sensor 50Hz Use HALLxx and LMG specifications to calculate the accuracy of the complete system 2 26 3 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the sensors from the current path disconnect the HD15 plug from the LMG and connect all of the 15pins together with ground shield of the plug To do this the load current has to be switched off 2 26 4 Connection of
2. Figure 107 SSU4 mounted under LMG450 Dimensions W D H 320mm 306 7mm 224 6mm with feets 176 9 without feets ZES ZIMMER 163 218 Sensors and Accessories for precision power meters Accessories 6 2 5 SSU4 connector cables 6 2 5 1 Cable to connect measuring signal plugs of SSU4 with LMG310 current inputs SSU4 K L31 Intrument Figure 108 SSU4 K L31 to connect measuring signal plug of SSU4 to LMG310 current inputs Cable to connect up to four PSU600 to the current input channels of 1 LMG310 1 LMG310 and 1 LMG95 1 LMG450 but better using PSU600 K L45 2 LMG310 in Aron wiring or any other amperemeter 6 2 5 2 Connection cable PSU600 to SSU4 PSU600 K3 K5 K10 PSU600 SSU4 DSUB9F Figure 109 PSU600 K3 to connect the PSU600 to the SSU4 length 3m Connection cable from SSU4 to PSU600 length 3m 5m or 10m ZES ZIMMER 164 218 Sensors and Accessories for precision power meters Accessories 6 2 6 Modification option of SSU4 available for the use of PSU60 PSU200 PSU400 and PSU700 together with SSU4 K L31 The modification is needed only for the use of PSU60 PSU200 PSU400 or PSU700 with SSU4 K L31 no modification is necessary for PSU200 K L45 or something like that The following changes concerning this documentation are done 1 In the four connector to the sensors pin1 is connected with gnd for current return 2 The current output signal of the sensor is connected via a 0 o
3. 6 9 6 Incremental encoders with single pulse outputs Potion vie _ Unit Left most Left Right most switch adjacent of 1 min 288000 1152000 4608000 9216000 revolution speed Specified tolerance of m value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 of m range Mas pulse anput 4800 19200 76800 153600 frequency using Formula for Scale imin 2304000 Z 2304000 Z 2304000 Z 1152000 2 Z Z is the number of a per rotation of the used incremental encoder speed Kee The recognition of the rotating direction is not possible The output voltage is always negative if input B is left open The output voltage is always positive if input B is tied to pin supply 5V 6 9 7 Scaling In range menu of LMG450 you can set the calculated scale value of the last line from above mentioned chart depending on the pulse rate Z per rotation of the used incremental encoder Then the revolution will be presented correctly in value 1 min on the display The unit will however be A or V Displayed 1 465kA means 1465 1 min For further user friendly presentation utilise capabilities of LMG450 built in formula editor and user defined menu 6 9 8 Pin assignment 9 pin D Sub connector male to incremental encoder Re I al Function Supply Supply GND Input A Input B No connection Screen 5V 5V on internal test pins on GND screen ZES ZIMMER 175 218 Sensors and Accessories for precision power meter
4. Plug the connector of L45 Z318 labeled with supply to one of the LMG450 current clamp 1 2 3 4 jacks whichever is free if your application uses four current sensors then use LMG Z318 with external supply via wall wart Switch on the power meter and connect the LAN cable assure that the LMG firmware is 2v121 or newer ZES ZIMMER 184 218 Sensors and Accessories for precision power meters Accessories 6 12 5 Connection of the adapter L50 Z318 with LMG500 e Plug the connector of L50 Z318 labeled with to LMG s COM B conn to the LMG500 COM B jack e Plug the connector of L50 Z318 labeled with supply to one of the LMG500 sensor ID jacks whichever is free e Switch on the power meter and connect the LAN cable e assure that the LMG firmware is 4v077 or newer 6 12 6 Connection of the adapter LMG Z318 with any LMGxx e Connect the DSUB9 jack of LMG Z318 with a 1 1 serial connection cable to LMGs COMa e Connect the wall wart with power input of LMG Z318 e Switch on the power meter and connect the LAN cable 6 12 7 Configure the LAN connection with the Realport setup wizard e You will find the setup wizard on the ZES support CD under driver z318 or on the webpage http www zes com Start setup32 exe for 32 bit systems or setup64 exe for 64 bit systems Press next the wizard trys to find the ethernet adapter If it is not found press reset for about 3 seconds at the backside of the ethernet ad
5. unit Transducer heads are mounted using four M10 screws inserted into the holes on the brackets The heads can be installed in any directions 2 23 8 General specifications operating environment temperature transducer head 0 C to 55 C temperature electronics rack 10 C to 40 C humidity noncondensing 20 80 RH ambient storage temperature 20 C to 85 C power supply 100 115 230V 10 user selectable 50 60Hz SAT2000 50VA SAT2000hf 50VA SATSO000 100VA connection cable between standard 10m optional on request 2 5m 5m 20m 30m analogue output connector DSUB15 female use analogue current output adapter to eee a 2 23 9 Specifications SAT2000 nominal input current 125Apk to 2000Apk user selectable in 125Apk steps please specify at order transformation ratio depends on programming adapter max nominal input current 125 1 2000 1 overload capacity 10kA for 100ms DC accuracy offset error lt 2ppm offset stability no load lt lppm month linearity error lt 2ppm temperature coefficient of I 10 C 40 C lt 0 1ppm K ZES ZIMMER 104 218 Sensors and Accessories for precision power meters Current sensors Use SAT2000 and LMG specifications to calculate the accuracy of the complete system bandwidth 3dB lt 1 Inom DC 50kHz dynamic response di dt slew rate 10 90 gt 20A us delay time lt lus Busbar fee zone t 110mm r 110m isolation charact
6. Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the hall sensor 50Hz Use HALLxx and LMG specifications to calculate the accuracy of the complete system This sensors have an additional 9 pin SUB D connector for an external supply for example SSU4 If you want to use your own supply you have to use the following pins of the 9 pin SUB D connector ZES ZIMMER 113 218 Sensors and Accessories for precision power meters Current sensors GND Pin 3 and Pin 4 always connect both 15V Pin 5 15V Pin9 Please make sure that your own power supply can drive the needed supply current If you offer too few current you will get distortions and other accuracy losses in your measured current without warning 2 25 3 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the sensors from the current path disconnect the DSUB9 plug and the HD15 plug from the LMG and connect all of the 9pins and all of the 15pins together with ground shield of the plugs To do this the load current has to be switched off 2 25 4 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 i
7. regard maximum trms input current 50ohms Om 20m 40m 1000hms Om oom paom Om 20m 200ohms Tom pom Om 20m 40m 500ohms 1000ohms max ms value max ts value ZES ZIMMER 134 218 Sensors and Accessories for precision power meters Current sensors 2 30 6 Connection of the sensor with LMG450 The use with LMG450 is not possible 2 30 7 Connection of the sensor with LMG500 Use external sensor input you get the following ranges all in A lohm 2 regard maximum trms input current 2ohms EMEN regard maximum trms input current Sohms regard maximum trms input current 10ohms regard maximum trms input current 20ohms 15m ZES ZIMMER 135 218 Sensors and Accessories for precision power meters Current sensors regard maximum trms input current 50ohms regard maximum trms input current 1000hms regard maximum trms input current 200o0hms Tm regard maximum trms input current 500ohms regard maximum trms input current 1000ohms regard maximum trms input current ZES ZIMMER 136 218 Sensors and Accessories for precision power meters Current sensors 2 31 Low current shunt with overload protection LMG SHxx P Output connection to LMG Figure 95 LMG SHxx P 2 31 1 A Safety warning Always connect the sensor first to the meter and afterwar
8. typical applications corner corner accu range connec 95 45 50 freq freq racy tion High voltage divider HST HST3 DC 300kHz 0 05 3kV volt lead x x x general purpose HST6 DC 300kHz 0 05 6kV volt lead x x x general purpose HST9 DC 300kHz 0 05 9kV volt lead x x x general purpose HST12 DC 300kHz 0 05 12kV volt lead x x x general purpose ZES ZIMMER 12 218 Sensors and Accessories for precision power meters Introduction 1 4 Advantages and disadvantages of different current sensor types This section should give you a help to choose the best sensor for your application First of all you should know that the exactest measurement you can do is to use the direct inputs of the meter The errors of the phase shift and the delay of the channels are optimised for a precise power measurement If you must use an external sensor you should know the following points about the different kinds of the sensors DC current clamps e easy to use the sensor can be clamped on the circuit to be measured without interrupting the circuit e small bandwidth low accuracy AC current clamps e easy to use the sensor can be clamped on the circuit to be measured without interrupting the circuit e small bandwidth medium accuracy no DC measurement Rogowski flex sensors e easy to use especially if few space is available the sensor can be clamped on the circuit to be measured witho
9. 15V LMGS500 pins EEPROM clk pin9 EEPROM data pinlO EEPROM vec pinl1 signal out pinl2 gnd pin13 gnd pinl4 gnd pin15 sensor detection ZES ZIMMER 213 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base e Incase of supply via sensor supply unit SSU4 you can supply the sensors continuously with an additional SSU4 Or supply both sensors in parallel with one output of the SSU4 but allow primary current only to the active sensor pin assignment of the DSUB9 connector of SSU4 pinl nc pin2 nc pin3 gnd pin4 gnd pin5 15V pin6 signal pin7 nc pins status pin9 15V ZES ZIMMER 214 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 7 Avoid distortion when using external sensors in noisy environment External current sensors with voltage output connected to the precision power meter series LMG have usually an output voltage of a few mV to several V This sensors can be connected to the LMG Isensor input and current measurements can be done with a high accuracy but a few points have to be kept in mind Also sensors with current output can have distortion problems Especially in EMC noisy environments with high dU dt voltages the following points should be considered to achieve best accuracy and low noise e Use well shielded koaxial cable to connect sensors with voltage output to the power meter LMG Sensors with current
10. 9A high frequency source Figure 92 Arithmetic mean value application To determine the arithmetic mean value of two currents Imean 11 1I2 2 set the LMG Iscale to 3 In high frequency lightning applications where a earth current worth mentioning is present the light density is proportional to the arithmetic mean value of the two currents I1 and I2 2 29 4 4 Difference of two currents starter electronic electronic ballast Figure 93 Difference of two currents To determine the difference of two currents Ilamp Isum lIstarter set the LMG Iscale to 6 The lamp current Ilamp is the difference of Isum and the current through the starter electronic during the operation ZES ZIMMER 130 218 Sensors and Accessories for precision power meters Current sensors 2 29 4 5 Improving the accuracy due to common mode effects In high frequency applications with current measurement on high common mode voltage potential it is advantageous to connect the low output of this current transformer with earth There is a double galvanic separation in the LMG and inside the current transformer itself So the secondary side has neither galvanic contact with the load current nor with earth the current channel is floating on an undefined potential The HF accuracy can be improved by draging down the floating voltage to about earth potential 2 29 5 Connection of the sensor with LMG90 310 or other instruments with
11. C calibration interval 1 year conductor in the middle of the clamp signal frequency 50 60 Hz 200A to 1000A 0 75 Use LMG Z322 and LMG specifications to calculate the accuracy of the complete system 2 6 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 6 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 6 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 6 7 Connection of the sensor with LMG450 Use direct current inputs I and I Alternative use L45 Z10 11 because of improved dynamic range with more ranges and better bandwidth 2 6 8 Connection of the sensor with LMG500 Use direct current inputs I and I Alternative use L45 Z10 11 because of improved dynamic range with more ranges and better bandwidth ZES ZIMMER 29 218 Sensors and Accessories for precision power meters Current sensors 2 7 Error compensated AC current clamp 1000A L45 Z10 Z11 Figure 11 L45 Z10 Z211 225 HDSUB1SM to LMG Figure 12 Dimensions of the L45 Z10 Z11 2 7 1 A Safety warning Always connect the sensor first t
12. Clip on rectangular a x b 20mm x 85mm 30mm x 120mm 60mm x 250mm Weight 100g 120g 160g Connection cable length 2m 2m 2m 1 Temperature range 20 C 85 C Protection class 600V CATIII Degree of pollution Output connection HD15 plug with EEPROM for LMG sensor input 2 27 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp The values are of measuring value of rated range value Frequency Hz 10Hz to 45Hz 45Hz to 65Hz 65Hz to 1kHz 1kHz to 5kHz FLEX xx current accuracy 0 54 1 5 0 5 0 6 0 54 1 5 Use FLEXxx and LMG specifications to calculate the accuracy of the complete system 2 27 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the sensors from the current path disconnect the HD15 plug from the LMG and connect all of the 15pins together with ground shield of the plug To do this the load current has to be switched off 2 27 5 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 27 6 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt
13. Current sensors 2 21 Precision current transducer 1000A PSU1000HF Figure 60 Dimensions of the PSU1000HF 2 21 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions 2 21 2 Specifications Nominal input current 1000A Transformation ratio 1000 1 Measuring range PSU 1000Apk Maximum input overload 4kA for 0 1s Bandwidth small signal o o O ZES ZIMMER 88 218 Sensors and Accessories for precision power meters Current sensors Slew rate 10 90 gt 100A us Response time to 90 of lt lus nominal input current Isolation e rated isolation voltage rms reinforced isolation 150V rated isolation voltage rms single isolation 300V with IEC 61010 1 standards and following conditions over voltage category III pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 3 1kV impuls withstand voltage 1 2 50us 5 7kV rated isolation voltage rms reinforced isolation 150V rated isolation voltage rms single isolation 300V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 5mm clearance distance 5mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact 2 21 3 Accuracy Accuracie
14. LMG Z502 15Hz 5kHz 0 02 1500A feed x x x high current no DC through very high precision LMG Z505 15Hz 5kHz 0 05 1500A feed x x x high current no DC through very high precision LMG Z510 15Hz 5kHz 0 1 1500A feed x x x high current no DC through high precision LMG Z520 15Hz 5kHz 0 2 1500A feed xX x x high current no DC through high precision LMG Z542 15Hz 5kHz 0 02 4000A feed x x x high current no DC through very high precision ZES ZIMMER 9 218 Sensors and Accessories for precision power meters Introduction Sensor name lower upper basic current primary L L L typical applications corner corner accu range connec 95 45 50 freq freq racy tion LMG Z545 15Hz 5kHz 0 05 4000A feed x x x high current no DC through very high precision LMG Z550 15Hz 5kHz 0 1 4000A feed x x x high current no DC through high precision LMG Z562 15Hz 5kHz 0 02 10kA feed x x x high current no DC through high precision LMG Z570 15Hz_ 5kHz 0 1 10kA feed x x x high current no DC through high precision LMG Z582 15Hz 5kHz 0 02 10kA feed x x x high current no DC through high precision for huge primary busbars LMG Z590 15Hz 5kHz 0 1 10kA feed x x x high current no DC through high precision for huge primary busbars Precision current transducer PSU60 DC 100kHz 0 02 60A feed x x x applications with DC current through frequency inverter DC l
15. ZES ZIMMER 125 218 Sensors and Accessories for precision power meters Current sensors 2 28 7 Connection of the sensor with LMG450 You can use L45 Z09 but it is not recommended to use this high frequency sensor with the LMG450 2 28 8 Connection of the sensor with LMG500 Use Isensor external sensor input ZES ZIMMER 126 218 Sensors and Accessories for precision power meters Current sensors 2 29 Highvoltage HF summing current transformer L95 Z06 HV Figure 89 L95 Z06 HV 2 29 1 A Safety warning Always connect the sensor first to the meter and earth the guard terminal and afterwards to the device under test The guard terminal must be grounded to bypass capacitiv currents from input to output This also reduce errors by common mode voltage Please refer to chapter 1 1 Safety precautions L95 Z06 HV is an accessory for the precision power meters LMG with a high bandwidth The high voltage version of L95 Z06 eliminate the 4mm safety sockets as input terminals The limited clearances and creepage distances are removed by usage of highvoltage wire All other specifications are the same as L95 Z06 It simplifies the measurement of output power in high frequency applications with floating potential For example lighting applications ultrasonic systems loss power measurement at television deflection coils The high frequency design provides best accuracy at high frequencies The current transformer ha
16. all in A lohm ZES ZIMMER 139 218 Sensors and Accessories for precision power meters Current sensors ax peak value 68m 125m 250m 300m ji f2 fe fe don t use the upper ranges outside accuracy specification 2ohms EMEN don t use the upper ranges outside accuracy specification Sohms don t use the upper ranges outside accuracy specification 10ohms don t use the upper ranges outside accuracy specification 20ohms 15m don t use the upper ranges outside accuracy specification 50ohms don t use the upper ranges outside accuracy specification 1000hms ZES ZIMMER 140 218 Sensors and Accessories for precision power meters Current sensors don t use the upper ranges outside accuracy specification 200o0hms don t use the upper ranges outside accuracy specification ZES ZIMMER 141 218 Sensors and Accessories for precision power meters Current sensors 2 32 Precision wideband current transformer WCT100 LMG Z601 zs ZIMMER f o A em vo sae ais Figure 96 LMG Z601 xx ig laa Ta T amp Da t a e Figure 97 LMG Z601 2 32 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test An open connection on the secondary side will cause hazardous voltage and might destroy the transformer Please refer to chapter 1 1 Safe
17. current input The use with LMG90 is not possible With LMG310 use Isensor external Shunt input 2 29 6 Connection of the sensor with LMG95 Use Isensor external Shunt input 2 29 7 Connection of the sensor with LMG450 You can use L45 Z09 but it is not recommended to use this high frequency sensor with the LMG450 2 29 8 Connection of the sensor with LMG500 Use Isensor external sensor input ZES ZIMMER 131 218 Sensors and Accessories for precision power meters Current sensors 2 30 Low current shunt LMG SHxx Output connection to LMG Figure 94 LMG SHxx 2 30 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Please regard that there is no isolation inside the Sensor therefore the instrument needs isolated inputs The Sensor is suitable for LMG95 LMG500 and LMG310 but not for LMG450 Please refer to chapter 1 1 Safety precautions 2 30 2 Selection of the resistance value Select an applicable shunt resistance according to the necessary load current range Values between 1 ohm and 1000 ohms are available But take into concern that this shunt resistance is connected in series to your device under test Oversized resistors may distort and take influence on the load current 2 30 3 Specifications Accuracy The specified accuracy is valid in combination with the LMG95 LMG500 sensor input impedance of 100kOhm and the correct sett
18. internal supply via LMG and the Isensor external shunt input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 10 6 Connection of the sensor with LMG450 Use sensor input you get the following ranges ZES ZIMMER 37 218 Sensors and Accessories for precision power meters Current sensors 2 10 7 Connection of the sensor with LMG500 Use L50 Z14 you get the following ranges ZES ZIMMER 38 218 Sensors and Accessories for precision power meters Current sensors 2 11 Precision current transformer 1500A LMG Z502 Z505 Z510 Z520 135 x OZ k enee aani a heni nk M5 ges KP l amp n c cox ESI NG 1S yun A 6 5 KI a i io t p65 R 40 78 5 ha ad 92 110 Figure 20 Dimensions of LMG Z502 Z505 Z510 Z520 10mm 34mm 51mm Figure 21 LMG Z502 Z505 Z510 Z520 suitable bus bars ZES ZIMMER 39 218 Sensors and Accessories for precision power meters Current sensors P1 K autee A between P1 K and S1 k marked with an arrow P2 L S1 k S2 Figure 22 LMG Z502 Z505 Z510 Z520 connection diagram 2 11 1 A Safety warning Always
19. 1 Active error compensated AC current clamp 40A LMG Z406 Z407 pens conductor Figure 1 LMG Z406 Z407 standard length 3m i HDSUB15 tional 1m 10 optional 1m m to LMG 23 L 115 Figure 2 Dimensions of the LMG Z406 Z407 2 1 1 A Safety warning No safety isolation measurements only at insulated conductors allowed Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 2 1 2 Specifications Measuring range current clamp 120Apk Maximum input overload capability 500A for 1s Bandwidth 5Hz to 50kHz bare conductor phase ground 30Veff insulated conductor see cable spec ZES ZIMMER 17 218 Sensors and Accessories for precision power meters Current sensors Temperature range 10 C to 50 C Weight 120g Output connection HD15 with EEPROM for LMG sensor input With its high basic accuracy the lower cut off frequency of 5Hz and the upper cut off frequency of 50kHz this clamp fits best for measurements at frequency inverter output The internal error compensation circuit is designed especial for this application 2 1 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp The values are i
20. 100A to 400A lt 0 04 lt 0 07 lt 0 08 lt 0 07 lt 0 15 lt 0 1 400A to 1000A lt 0 02 lt 0 05 lt 0 05 lt 0 05 lt 0 1 lt 0 08 1000A to 2400A lt 0 02 lt 0 04 lt 0 05 lt 0 04 lt 0 1 lt 0 06 2400A to 4000A lt 0 02 lt 0 05 lt 0 05 lt 0 05 lt 0 1 lt 0 08 at 30Hz to 48Hz and 66Hz to 440Hz twofold errors at 15Hz to 30Hz and 440Hz to 5kHz threefold errors Use LMG Z542 Z545 Z550 and LMG specifications to calculate the accuracy of the complete system 2 12 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 12 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 12 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 12 7 Connection of the sensor with LMG450 Use direct current inputs I and I Or use L45 Z22 and sensor input for better dynamic range but small additional error term 2 12 8 Connection of the sensor with LMG500 Use direct current inputs I and I ZES ZIMMER 44 218 Sensors and Accessories for precision power meters Current sensors 2 13 Precision current transformer 10kA LMG Z562 Z570 285 160 14
21. 126uA 9 526uA AP 0 15 100 92mW 0 015 100 92mW 0 01 100 6 252W 138uW 13 8uW 625 2uW 777uW ZES ZIMMER 209 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 4 Example of an error calculation LMG500 with HST3 In this example an error calculation is shown with the LMG500 and HST3 measuring the loss power of a 3000V 10A 60Hz pure sinewave voltage and current PF 0 3 device under test e HST high voltage divider HST3 scale 1000 1 HST3 tolerance 0 05 0 06 45 65Hz Aphi_HST3 0 06 360 2 pi 0 001047197551 rad e Voltage measurement Ueff 3000V 60Hz LMGS500 Uscale 1000 LMG500 Urange 3V 6Vpk 3000V 6000Vpk LMGS500 U measuring accuracy 0 01 of measuring value 0 02 of measuring range e Current measurement leff 10A 60Hz LMGS500 Irange 10A 30Apk direct current input LMGS500 I measuring accuracy 0 01 of measuring value 0 02 of measuring range e Power measurement PF 0 3 pure sinewave voltage and current gt phi acos PF f 60Hz S Ueff leff 30kVA P Veff leff PF 9kW LMG500 Prange Urange Irange 6000V 30A 180kW LMGS500 P measuring accuracy 0 015 of measuring value 0 01 of measuring range e Tolerance of voltage and power measurement AU_LMG500 0 01 100 3000V 0 02 100 6250V 0 3V 1 25V 1 55V AU_HST3 3000V 0 05 100 1 5V AU_total AU LMGS500 AU HST
22. 9 pins with the shield at the PSU plug or e Leave the PSU and the connection cable at the current path and disconnect the cable at the LMG supply unit side 1 Systems with supply via LMG Disconnect the HDSUB15 plug from the LMG and connect all of the 15 pins and the shield at the cable plug together 2 Systems with supply via supply unit SSU4 Disconnect the HDSUB15 plug from the LMG and disconnect the DSUB9 plug from the supply unit SSU4 Connect all of the 15 pins and the shield at the LMG cable plug together and connect all of the 9 pins and the shield at the SSU4 cable plug together To do this the load current has to be switched off 2 15 5 Connection of the sensor with LMG90 310 or other instruments with current input Use sensor suppy unit SSU4 with modification for PSU60 200 400 700 SSU4 MOD and PSU K3 K5 K10 and SSU4 K L31 and direct current inputs I and I ZES ZIMMER 53 218 Sensors and Accessories for precision power meters Current sensors 2 15 6 Connection of the sensor with LMG95 Use PSU60 200 400 700 K L95 supply via LMG95 no additional error terms but only one range and not suitable for small currents With slightly less accuracy at fullrange but with considerably more dynamic range and so better accuracy at small currents it is also possible to use PSU60 K LSO and L95 Z07 With this assembly you get 8 ranges and a good dynamic down to a few Amps but a small additional error term from the PSU60 K
23. Connection of the sensor with LMG450 Use direct current inputs I and I Alternative use L45 Z06 07 because of improved dynamic range with more ranges and better bandwidth 2 3 8 Connection of the sensor with LMG500 Use direct current inputs I and I Alternative use L45 Z06 07 because of improved dynamic range with more ranges and better bandwidth ZES ZIMMER 23 218 Sensors and Accessories for precision power meters Current sensors 2 4 AC current clamp 200A 0 2A LMG Z326 m Z J ni m SSS Figure 6 Dimensions of the LMG Z326 2 4 1 A Safety warning No safety isolation measurements only at insulated conductors allowed Always connect the sensor first to the meter and afterwards to the device under test Please refer to chapter 1 1 Safety precautions 2 4 2 Specifications 40Hz to 10kHz lt 0 4VA bare conductor phase ground 30Veff ZES ZIMMER 24 218 Sensors and Accessories for precision power meters Current sensors oe insulated conductor see cable spec 2 safety sockets for 4mm plugs 2 4 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp signal frequency 50 60 Hz Use LMG Z326 and LMG specifications to calculate the accuracy of the complete system 2 4 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor t
24. L50 cable Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 It depends on the magnitude and the dynamic of the measuring current which connection is better 2 15 7 Connection of the sensor with LMG450 PSU60 K L45 Use PSU60 K L45 and SSU4 standard version without modification to PSU DSUBOf 2 5m lt lt to LMG HDSUB1i5m tossu amp om DSUBSF SSK Figure 36 PSU60 K L45 to connect the PSU60 to the LMG450 and the SSU4 This cable PSU60 K L45 is used to connect a precision current sensor PSU60 to a power meter LMG450 and to supply it by a sensor supply unit SSU4 In the connector to the LMG450 the adjustment data of the PSU60 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU60 head and the screws are sealed when you have ordered the package PSU60 L45 This should prevent that the wrong PSU60 head is connected to the cable The connection is quiet simple e Switch all power off and plug the connector labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG450 to the LMG450 external sensor input ZES ZIMMER 54 218 Sensors and Accessories for precision power meters Current sensors e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least Measuring ranges sensor input max peak value
25. LED NORMAL OPERATION 9 POLE D SUB MALE 15 6 L 4x 4 5 MOUNTING HOLES 2x 5 5 MOUNTING HOLES A 3R cy 7 b Figure 43 Dimensions of the PSU200HF 2 17 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions ZES ZIMMER 63 218 Sensors and Accessories for precision power meters Current sensors 2 17 2 Specifications Maximum input overload Bandwidth small signal 20App Rb 2 5Ohm primary current in the middle of the transducer head 0 4dB is equivalent to 4 7 DC to 150kHz 3dB typical DC to gt 1MHz Slew rate 10 90 gt 100A us Burden Rb 0 30 ohms Isolation e rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 2000V with IEC 61010 1 standards and following conditions over voltage category II pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 5 4kV impuls withstand voltage 1 2 50us 9 9kV rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 1000V with EN50178 standards and following conditions over voltage category IIL
26. SAT5000 sensor with LMG450 direct current input I and I 600mA 2 5A range 3 ranges 2 23 18 Connection of the SAT5000 sensor with LMG500 direct current input I and I 20mA 2 5A range 8 ranges 2 23 19 Included in delivery transducer head connection cable between transducer head and electronics rack standard length 10m rack with supply and electronics including AC power cord programming plug please specify the current range at order not necessary with SAT2000hf analogue current output adapter for the connection with the precision powermeter LMG DSUB15 female to three 4mm plugs current output current return guard 1 5m can be extended to up to 15m by using standard laboratory leads analogue current output adapter for the connection with the precision powermeter LMG DSUB15female to two 4mm plugs current output current return 10cm can be extended to up to 15m by using standard laboratory leads ZES ZIMMER 108 218 Sensors and Accessories for precision power meters Current sensors 2 24 Hall current sensors 50 100 200A L45 Z28 HALLxx rUSUBISOM TOLG Figure 72 Dimensions of the L45 Z28 HALL50 and HALL100 HDSUB1SM to LMG Figure 73 Dimensions of the L45 Z28 HALL200 2 24 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Do not overload any curren
27. ZIMMER 8 218 Sensors and Accessories for precision power meters Introduction 1 2 Selection table current sensors Sensor name lower corner freq Current clamps upper corner freq basic accu racy current range primary connec tion L L J typical applications LMG Z327 45Hz 10kHz 1 100A clampon x x general purpose LMG Z326 40Hz 10kHz 0 8 200A clampon x x general purpose LMG Z325 40 Hz 5kHz 2 200A clampon x x general purpose LMG Z322 30Hz 10kHz 0 5 1000A clamp on x x x general purpose LMG Z329 45Hz 5kHz 0 5 3000A clampon x x x general purpose LMG Z406 5Hz 50kHz 0 2 40A clamp on x x x frequency inverter output ZA07 L45 Z06 5Hz 50kHz 0 2 40A clamp on x x x frequency inverter output ZO7 L45 Z10 2Hz 40kHz 0 15 1000A clamp on x x x frequency inverter output Zll L45 Z16 5Hz 10kHz 0 15 3000A clamp on x x x frequency inverter output Z17 L45 Z26 DC 2kHz 1 6 1000A clampon x x x the only clamp on solution for DC applications Rogowski clamps L45 Z32 10Hz 5kHz 1 1 500A clampon x x x 50Hz power quality Flex500 very flexible clamp on L45 Z32 10Hz 5kHz 1 1 1000A clamp on x x x 50Hz power quality Flex1000 very flexible clamp on L45 Z32 10Hz 5kHz 1 1 3000A clamp on x x x 50Hz power quality Flex3000 very flexible clamp on Precision Transformer
28. be switched off ZES ZIMMER 152 218 Sensors and Accessories for precision power meters LMG450 connection cables and adapter 4 LMG450 connection cables and adapter The special design of all LMG450 sensors makes them very easy and comfortable to use The HD15 SUB D plug contains the identification of the sensor type the measuring ranges including the needed scaling and several more parameters The LMG450 reads this values and the meter will automatically configured to the optimum adjustments for using this special sensor The LMG range setup is automaticaly taken from the sensor EEPROM Further on we correct some of the sensor errors transfer error delay time So you get the best measuring results with each sensor 4 1 BNC adapter to sensor input HD15 without EEPROM L45 Z09 Figure 102 L45 Z09 By this adapter you can connect a voltage via a BNC cable to the LMG450 external current sensor input This voltage has to be isolated because the BNC screen is electrically connected to the case of the LMG450 This is a simple electrical adapter No values can be stored ZES ZIMMER 153 218 Sensors and Accessories for precision power meters LMG450 connection cables and adapter 4 2 Adapter for isolated custom current sensors with 1A output L45 Z22 grey to current sensor low p HD15M plug e Sensor input Figure 103 L45 Z22 4 2 1 A Safety warning Use only galvanic separating current
29. current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transformer ZES ZIMMER 49 218 Sensors and Accessories for precision power meters Current sensors Amplitude error of measuring value Phase error at 48 to 66Hz Current Z582 Z590 50A to 250A lt 0 05 lt 0 1 lt 0 3 lt 0 15 250A to 1000A lt 0 03 lt 0 07 lt 0 15 lt 0 1 1000A to 2500A lt 0 02 lt 0 05 lt 0 1 lt 0 08 2500A to 6000A lt 0 02 lt 0 04 lt 0 1 lt 0 06 6000A to 10kA lt 0 02 lt 0 05 lt 0 1 lt 0 08 at 30Hz to 48Hz and 66Hz to 440Hz twofold errors at 15Hz to 30Hz and 440Hz to 5kHz threefold errors Use LMG Z582 Z590 and LMG specifications to calculate the accuracy of the complete system 2 14 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 14 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 14 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 14 7 Connection of the sensor with LMG450 Use direct current inputs I and I Or use L45 Z22 and sensor input for better dynamic range but small additional error
30. direct current inputs I and I ZES ZIMMER 59 218 Sensors and Accessories for precision power meters Current sensors 2 16 6 Connection of the sensor with LMG95 Use PSU60 200 400 700 K L95 supply via LMG95 no additional error terms but only one range and not suitable for small currents With slightly less accuracy at fullrange but with considerably more dynamic range and so better accuracy at small currents it is also possible to use PSU200 K L50 and L95 Z07 With this assembly you get 8 ranges and a good dynamic down to a few Amps but a small additional error term from the PSU200 K L50 cable Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 It depends on the magnitude and the dynamic of the measuring current which connection is better 2 16 7 Connection of the sensor with LMG450 PSU200 K L45 Use PSU200 K LA5 and SSU4 standard version without modification to PSU DSUBOf 2 5m lt lt to LMG HDSUB1i5m tossu amp om DSUBSF WSK Figure 40 PSU200 K L45 to connect the PSU200 to the LMG450 and the SSU4 This cable PSU200 K L45 is used to connect a precision current sensor PSU200 to a power meter LMG450 and to supply it by a sensor supply unit SSU4 In the connector to the LMG450 the adjustment data of the PSU200 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU2
31. gt 23 3mQ A m 1 5mm Now the additional resistor can be calculated to Radditional R operation Rcable R meter 50mQ 23 3mQ 8mQ 18 7mQ If you want to use a longer cable to built up this additional resistor the length is calculated l Ravie A R ojeraion Bi A 50mQ 8mQ m 1 5mm 3 6m p p 0 01759 mm l Please note the maximum current loading capability of the cable ZES ZIMMER 204 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 2 Example of an error calculation general derivation The calculations illustrate how to calculate the errors of U I or P when using an external sensor The following parameters of the measurement are given The measurement is made with a LMG95 the accuracies of the channels are in of measuring value of measuring range Frequency Hz 45 to 65 0 015 0 02 The clamp with which is measured is the LMG Z322 with an accuracy of 200A to 1000A 0 75 Ratio of 1000 1 At the I channel we are using a scaling of 1000 to get the correct currents at the display In the following examples all values are calculated for the primary side what means on measured signal level The readings are Utms 230 000V range 250V gt range peak value 400V Ims 100 000A primary 0 1A secondary range 150mA gt range peak value 469mA calculated back to the primary side range 150A gt range peak value 469
32. gt 20kA ms Isolation Test voltage secondary connector to busbar 5kV AC Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact Temperature range transducer head 0 C to 60 C electronics 10 C to 40 C Output connection 25 pole Sub D from sensor head to measuring electronics mounted in a separate rack PSU S20 2 22 4 Accuracy Accuracies based on sinusoidal current frequency DC to 100Hz ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer Amplitude error of measuring value Phase error of measuring range PSU PSU2000 0 015 0 005 Use PSU2000 and LMG specifications to calculate the accuracy of the complete system 2 22 5 Programming the PSU2000 with the programming plug A If the programming plug is used always connect the programming plug to the transducer head side of the cable NOT to the PSU S20 For the current range 1000A no programming plug is required Connection PIN No Jumper wiring Current P1 only at P1 female 1000A No programming plug required connect cable directly to the head ZES ZIMMER 94 218 Sensors and Accessories for precision power meters Current sensors example connections all jumper wirings depend on the for all currents to be measured currents P1 is connected to the PSU2000 head P2 to the cable refer 2 22 8 2 22 6 Programming example of the Programming plug In
33. input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 27 7 Connection of the sensor with LMG450 Use sensor input internal supply via LMG you get the following ranges FLEXS500 ZES ZIMMER 120 218 Sensors and Accessories for precision power meters Current sensors FLEX 1000 FLEX3000 2 27 8 Connection of the sensor with LMG500 Use L50 Z14 internal supply via LMG you get the following ranges FLEXS500 FLEX 1000 FLEX3000 ZES ZIMMER 121 218 Sensors and Accessories for precision power meters Current sensors 2 28 HF summing current transformer L95 Z06 Figure 84 L95 Z06 2 28 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Please refer to chapter 1 1 Safety precautions L95 Z06 is an accessory for the precision power meters LMG with a high bandwidth It simplifies the measurement of output power in high frequency applications with floating potential For example lighting applications ultrasonic systems loss power measurement at television deflection coils The high frequency design provides best accuracy at high frequencies The current transformer has a voltage output for the direct connetion to the LMG external Shunt Transformer input The two galvanically separated primary windings are suitable to use in series to increase the sensitivity for smal
34. labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG450 to the LMG450 external sensor input e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least Measuring ranges sensor input limited by PSU600 to max 600Apk Accuracy Use PSU600 and LMG450 specifications to calculate the accuracy of the complete system Add 90mA to the primary current DC offset tolerance 2 19 8 Connection of the sensor with LMG500 PSU600 K L50 Use PSU600 K L50 and L50 Z14 supply via LMGS500 connect L50 Z14 to LMG 500 PSU600 DSUBSF This cable PSU600 K L50 is used to connect a precision current sensor PSU600 to the power meter LMG500 In the connector to the LMG500 the adjustment data of the PSU600 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU600 head and the screws are sealed when you have ordered the package PSU600 LS0 This should prevent that the wrong PSU600 head is connected to the cable ZES ZIMMER 80 218 Sensors and Accessories for precision power meters Current sensors The connection is quiet simple Switch all power off plug the connector labeled LMG500 to the adapter L50 Z14 mounted on the LMG500 current channel Now you can switch on the power and make the measurements The rangenames of LMG500 the sensor name and calibration data are read ou
35. measuring range PSU PSU700 0 015 0 005 See specification of the LMG connection cable for the LMG measuring ranges and to calculate the accuracy of the complete system 2 20 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the PSU sensors from the current path you can do alternatively e Leave the PSU at the current path and disconnect the cable at the PSU side Disconnect the DSUB9 plug from the PSU and interconnect all of the 9 pins with the shield at the PSU plug or e Leave the PSU and the connection cable at the current path and disconnect the cable at the LMG supply unit side 1 Systems with supply via LMG Disconnect the HDSUB15 plug from the LMG and connect all of the 15 pins and the shield at the cable plug together 2 Systems with supply via supply unit SSU4 Disconnect the HDSUB15 plug from the LMG and disconnect the DSUB9 plug from the supply unit SSU4 Connect all of the 15 pins and the shield at the LMG cable plug together and connect all of the 9 pins and the shield at the SSU4 cable plug together To do this the load current has to be switched off 2 20 5 Connection of the sensor with LMG90 310 or other instruments with curr
36. normal mode and the current through the transducer head is within the measurement area pin6 Normal operation common This pin is connected to either Normal operation on or the Normal operation off depending on the unit s status pin7 Ip Low on This pin is connected to Ip Low common when the current through the transducer head is below 0 5 of the programmed current pin8 Ip Low off This pin is connected to the Ip Low common when the current through the transducer head is above 0 5 of the programmed current pin9 Overload warning common This pin is connected to either Overload warning on or Overload warning off pin depending on the unit s status 2 23 6 Analogue output connection DSUB15 female pin assignment pinl 2 current return Ilow pin9 10 current out I pin3 4 5 6 7 8 11 12 13 14 15 do not connect Two adaptors are included in delivery 1 DSUBI5f to three 4mm plugs 1 5m red current output black current return blue guard 2 DSUB15f to two 4mm plugs 10cm red current output black current return ZES ZIMMER 103 218 Sensors and Accessories for precision power meters Current sensors 2 23 7 Mounting requirements The electronics and supply unit must be mounted horizontally To ensure proper cooling the heat sink on the right and the air inlet on the left side of the unit must be kept free Failure to do this may result in improper cooling of the system which may lead to malfunction of the
37. of meas value of measuring range PSU PSU400 0 015 0 005 See specification of the LMG connection cable for the LMG measuring ranges and to calculate the accuracy of the complete system 2 18 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the PSU sensors from the current path you can do alternatively e Leave the PSU at the current path and disconnect the cable at the PSU side Disconnect the DSUB9 plug from the PSU and interconnect all of the 9 pins with the shield at the PSU plug or e Leave the PSU and the connection cable at the current path and disconnect the cable at the LMG supply unit side 1 Systems with supply via LMG Disconnect the HDSUB15 plug from the LMG and connect all of the 15 pins and the shield at the cable plug together 2 Systems with supply via supply unit SSU4 Disconnect the HDSUB15 plug from the LMG and disconnect the DSUB9 plug from the supply unit SSU4 Connect all of the 15 pins and the shield at the LMG cable plug together and connect all of the 9 pins and the shield at the SSU4 cable plug together To do this the load current has to be switched off 2 18 5 Connection of the sensor with LMG90 310 or other ins
38. of the measuring current which connection is better 2 17 7 Connection of the sensor with LMG450 You can use PSU200 K L45 and SSU4 standard version without modification but it is not recommended to use this high frequency sensor with the LMG450 2 17 8 Connection of the sensor with LMG500 PSU200HF K L50 Use PSU200HF K L50 and L50 Z14 supply via LMGS500 E Y PSU200HF K L50 L50 Z14 la PSU200HF fe 2 5M This cable PSU200HF K L50 is used to connect a precision current sensor PSU200HF to the power meter LMGS500 In the connector to the LMG500 the adjustment data of the PSU200HF head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU200HF head and the screws are sealed when you have ordered the package PSU200HF L50 This should prevent that the wrong PSU200HE head is connected to the cable ZES ZIMMER 66 218 Sensors and Accessories for precision power meters Current sensors The connection is quiet simple Switch all power off plug the connector labeled LMG500 to the adapter L50 Z14 mounted on the LMG500 current channel Now you can switch on the power and make the measurements The rangenames of LMG500 the sensor name and calibration data are read out of the sensor EEPROM automaticaly Measuring ranges sensor input limited by PSU200HF to max 200Apk Accuracy Use PSU200HF and LMGS500
39. output should be connected with twisted measuring leads e Avoid ground loops do not connect the shield and or housing of the sensor at several different points to earth Take into concern that other instruments measuring the same secondary signal might have inputs without isolation to earth e g oscilloscopes Important is the star shaped grounding of the complete system e In the case of well shielded sensors e g Pearson transducers the shield housing should be connected to PE to allow the capacitiv coupled distortion to find a low impedance way to earth and do not couple to the measuring signal If so the low input I should not be connected to earth oe eI Figure 145 Grounding of well shielded sensors e In applications with current measurement on high common mode voltage potential it is advantageous to connect the low output of a galvanic separated current transformer with earth There is a double galvanic separation in the LMG and inside the current transformer itself So the secondary side has neither galvanic contact with the load current nor with earth the current channel is floating on an undefined potential The accuracy can be improved by draging down the floating voltage to about earth potential and give the distortion currents a low impedance way to earth ZES ZIMMER 215 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base current transducer pr
40. over all measuring ranges constant impedance of this input best accuracy can be achieved For the connection of LMG Z602 to the precision power meter LMG use narrow twisted laboratory leads not longer than needed or in HF applications slightly better 4mm to BNC adaptor and coaxial cable 2 33 2 Specifications Isolation 600V CATII 1000V CATI Test voltage output Ilow to busbar for higher voltages the primary lead has to be isolated according to the working voltage of the system Output connection safety sockets 4mm Temperature range 0 C to 50 C ZES ZIMMER 145 218 Sensors and Accessories for precision power meters Current sensors 160mm T60 HT 2 33 3 Accuracy Accuracies based on no DC current component ambient temperature 23 3 C calibration interval 1 year burden 100mOhms max 1m twisted laboratory leads or coaxial cable Full power accuracy for measuring current from 10A to 1000A Accuracy and bandwidth specification is for small signal as well as for wide signal level Frequency range 30Hz to 100Hz to 100kHz to 500kHz to 100Hz 100kHz 500kHz 1MHz Current of measuring value 0 25 0 25 Use LMG Z602 and LMG specifications to calculate the accuracy of the complete system 2 33 4 Sensor without LMG The secondary side of this current transformer has to be connected under all circumstances If the LMG has to be removed and the sensor can not be disconnected be sure
41. sealed when you have ordered the package PSU700 L50 This should prevent that the wrong PSU700 head is connected to the cable The connection is quiet simple Switch all power off plug the connector labeled LMG500 to the adapter L50 Z14 mounted on the LMG500 current channel Now you can switch on the power and make the measurements The rangenames of LMG500 the sensor name and calibration data are read out of the sensor EEPROM automaticaly ZES ZIMMER 86 218 Sensors and Accessories for precision power meters Current sensors Measuring ranges sensor input limited by PSU700 to max 700Apk Accuracy Use PSU700 and LMG500 specifications to calculate the accuracy of the complete system Add 105mA to the primary current DC offset tolerance 2 20 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is out of responsibility of ZES ZIMMER ZES ZIMMER 87 218 Sensors and Accessories for precision power meters
42. sockets U1 U2 and U3 they represent the artificial mid point are interconnected 6 3 4 Specifications Accuracy of the phase resistors in relation to each other 0 01 20mm x 52mm x Gm ZES ZIMMER 166 218 Sensors and Accessories for precision power meters Accessories 6 4 Adaptor for measurement at Schuko devices LMG MAS A max 250V CATH 16A CE ZS ZIMI Electronic Systems Figure 111 Adaptor for Schuko devices LMG MAS 6 4 1 A Safety warning Attention The PE jack should not be used for earthing external devices It is only allowed to use it for measuring purposes Please refer to chapter 1 1 Safety precautions 6 4 2 General The MAS is a adaptor for measuring at single phase devices with Schuko inlet connector up to 16A It was developed for the instrument series LMG The supply is done by the fix mounted Schuko inlet The load is connected to the fixed mounted Schuko jack With the LMG MAS you can measure the voltage jacks U and U The current is also accessable from I to I This jacks have to be connected to the jacks of the measuring instrument Important If you dont want to measure the current the jacks I and I have to be short circuit to enable the current to flow The internal wiring is done so that the load is measured with correct current This wiring is perfect suited for the measurement of stand by power An important point is the safety The MAS is in compliance with IEC
43. specifications to calculate the accuracy of the complete system Add 30mA to the primary current DC offset tolerance 2 17 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is out of responsibility of ZES ZIMMER ZES ZIMMER 67 218 Sensors and Accessories for precision power meters Current sensors 2 18 Precision current transducer 400A PSU400 Figure 45 PSU400 LED NORMAL OPERATION 2 LED SEE Mace 56 4x 4 5 MOUNTING HOLES ae 67 ry TPA T NG fas H mY ce D L oA l 2 a 1 Ak JI Y 93 TE 2x 5 5 MOUNTING HOLES w c te ee T y SE 3 iaag U 80 Figure 46 Dimensions of the PSU400 2 18 1 A Safety warning Always connect the sensor first to the meter and afterw
44. term 2 14 8 Connection of the sensor with LMG500 Use direct current inputs I and I ZES ZIMMER 50 218 Sensors and Accessories for precision power meters Current sensors 2 15 Precision current transducer 60A PSU60 Figure 34 PSU60 LED NORMAL OPERATION 9 POLE D SUB MALE 15 6 L 4x 4 5 MOUNTING HOLES 2x 5 5 MOUNTING HOLES tN 3R cy b Figure 35 Dimensions of the PSU60 2 15 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions ZES ZIMMER 51 218 Sensors and Accessories for precision power meters Current sensors 2 15 2 Specifications Bandwidth small signal 0 5 of nominal input current 1dB DC to 500kHz 3dB DC to gt 800kHz Slew rate 10 90 gt 25A us Response time to 90 of lt lus nominal input current Burden Rb 0 20 ohms Isolation e rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 2000V with IEC 61010 1 standards and following conditions over voltage category III pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 5 4kV impuls withstand vo
45. you change the scaling value of the corresponding power meters current channel the different turns are taken into account for all of the measuring values This approach is suitable for all feed through and clamp on current transducers Example e precision power meter LMG500 e current sensor PSU200 e measuring ranges full range 1 turn 0 78A 100A 10 turns 78mA 10A ZES ZIMMER 217 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 9 Range extension by external Shunt and direct current input I I Power meter LMG95 500 Ext Shunt sensor LMG SHxx output connection to LMG Figure 149 range extension by external shunt Measuring over a very wide current dynamic range might require to switch from direct current measurement via I and I for higher current to an external Shunt for very low current Because both the external Shunt input and the direct current input I I have the same reference ground and to prevent that the measuring current flows via the voltage sense of LMG SHxx the current has to be switched with two switches like shown in the figure The input jack and the appropriate scaling factor has to be set at the power meter S3 can be used in addition not to interrupt the load current while switching between external shunt and direct current input A typical application is the EN62301 conform measurement of small standby currents and high o
46. 0 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 2 10 2 Specifications Measuring range current clamp 9000Apk Sensors and Accessories for precision power meters ZES ZIMMER 36 218 Current sensors Maximum input 6000A for 5min Bandwidth 5Hz to 10kHz Protection class 600V CAT IN Wig 2 10 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp The values are in of measuring value of measuring range current clamp and in phase error in degree Frequency Hz 2Hzto 10Hzto 45Hzto 65Hz to 1kHzto 2 5kHz 5kHz to 10Hz 45Hz 65Hz 1kHz 2 5kHz to5kHz 10kHz Use L45 Z16 and LMG specifications to calculate the accuracy of the complete system Influence of coupling mode This current clamp can transfer only AC currents The compensation circuit may cause a DC signal wich is interpreted by the instrument as a DC current This could cause additional errors Therefore this clamp should only be used with the LMG setting AC coupling The accuracies are only valid for this case 2 10 4 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 10 5 Connection of the sensor with LMG95 Use L95 Z07
47. 00 head and the screws are sealed when you have ordered the package PSU200 L4S This should prevent that the wrong PSU200 head is connected to the cable The connection is quiet simple e Switch all power off and plug the connector labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG450 to the LMG450 external sensor input ZES ZIMMER 60 218 Sensors and Accessories for precision power meters Current sensors e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least Measuring ranges sensor input limited by PSU200 to max 200Apk Accuracy Use PSU200 and LMG450 specifications to calculate the accuracy of the complete system Add 30mA to the primary current DC offset tolerance 2 16 8 Connection of the sensor with LMG500 PSU200 K L50 Use PSU200 K LS0 and L50 Z14 supply via LMGS00 J aN PSU200 K L50 PSU200 A ES 2 5M Figure 41 PSU200 K L50 to connect PSU200 and LMG500 This cable PSU200 K L50 is used to connect a precision current sensor PSU200 to the power meter LMGS500 In the connector to the LMG500 the adjustment data of the PSU200 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU200 head and the screws are sealed when you have ordered the package PSU200 L50 This should prevent that the wrong PSU200
48. 1 1 serial cable connect to PC Figure 131 LMG Z316 This USB RS232 adapter Z316 is useful for the communication with a power meter LMG and a PC with USB port via a virtual COM port simulation The communication is transmitted by the driver over USB to the adapter for user purposes in the same way as e g the direct connection of PC COMx to LMG COMa The power meter LMG will be accessible via this virtual COM port Perfect suitable for LMG Control software 6 13 1 A Safety warning Please refer to chapter 1 1 Safety precautions 6 13 2 System requirements hardware specifications e Windows driver available for Windows XP home or professional Windows Vista see ZES support CD LMG500 USB driver e Linux driver is part of the kernel 2 4 x or newer ftdi_sio Modul e throughput up to 230 400 baud e supports data flow control with RTS CTS hardware reset with break e adapter length about 1m standard RS232 DSUB9 male with UNC nuts and USB typ A plug e connection to LMG with standard 1 1 serial cable elongation possible up to 15m ZES ZIMMER 189 218 Sensors and Accessories for precision power meters Accessories 6 13 3 RS232 plug DSUB9 male connector with UNC screw nuts pin assignment pinl CD carrier detect pin2 RX receive data pin3 TX transmit data pin4 DTR data terminal ready pin5 GND pin6 DSR dataset ready pin7 RTS request to send pins CTS clear to send pind RI
49. 1 875A 3 75A 7 5A 15A 30A 60A limited by PSU60 to max 60Apk Accuracy Use PSU60 and LMG450 specifications to calculate the accuracy of the complete system Add 9mA to the primary current DC offset tolerance 2 15 8 Connection of the sensor with LMG500 PSU60 K L50 Use PSU60 K L50 and L50 Z14 supply via LMG500 PSU60 K L50 y PSU6O Ay 2 5M Figure 37 PSU60 K L50 to connect PSU60 and LMG500 This cable PSU60 K L50 is used to connect a precision current sensor PSUGO to the power meter LMGS00 In the connector to the LMG500 the adjustment data of the PSU60 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU60 head and the screws are sealed when you have ordered the package PSU60 L50 This should prevent that the wrong PSU60 head is connected to the cable The connection is quiet simple ZES ZIMMER 55 218 Sensors and Accessories for precision power meters Current sensors Switch all power off plug the connector labeled LMG500 to the adapter L50 Z14 mounted on the LMG500 current channel Now you can switch on the power and make the measurements The range names of LMG500 the sensor name and calibration data are read out of the sensor EEPROM automaticaly Measuring ranges sensor input limited by PSU60 to max 60Apk Accuracy Use PSU60 and LMG500 specifications to calculate th
50. 2 7 6 Connection of the sensor with LMG450 Use sensor input you get the following ranges 2 7 7 Connection of the sensor with LMG500 Use L50 Z14 you get the following ranges ZES ZIMMER 31 218 Sensors and Accessories for precision power meters Current sensors 2 8 DC current clamp 1000A L45 Z26 Figure 13 L45 Z26 213 DSUBISM 107 an o LMG Figure 14 Dimensions of the L45 Z26 E 2 8 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 2 8 2 Specifications Nominal input current 1000A Max trms value 1000A Measuring range 1500Apk Maximum input 1500A Bandwidth DC to 2kHz Protection class 600V CAT IN 2 Degree of pollution ZES ZIMMER 32 218 Sensors and Accessories for precision power meters Current sensors HD15 with EEPROM for LMG sensor input 2 8 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp The accuracy is valid only with manual zero adjustment at the DC Clamp prior clamp on The values are in of measuring value of nominal input current Current Amplitude error Phase error Phase error D
51. 3 3 05V AP_LMG500 0 015 100 P 0 01 100 Prange 1 35W 18W 19 35W with P U I cos phi AP_HST3 IdP dU AU_HST3I IdP dI AI_HST31 ldP dphi Aphi_HST3 with AIl_HST3 0 current measurement has no influence on voltage measurement AP_HST3 II cos phi AU_HST3l U I sin phi Aphi_HST3I AP_HST3 10A 0 3 1 5V 3000 10 sin acos 0 3 0 001047197551 34 47W AP_total AP_LMG500 AP_HST3 53 82W ZES ZIMMER 210 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 5 Phase correction of current transducers with LMG500 Current sensors low frequency types for 50Hz as well as high frequency types insert a delay in the current measurement path This behavior is also called phase error and means an additional error term in the power measurement At high frequency applications and also even low frequency applications at very low power factor this phase error may destroy the complete measurement Even a few hundred nanoseconds add a significant power error in case of low power factor A great feature of the LMG500 is the capability to correct the delay time of current and voltage sensors with the time resolution of nanoseconds To do this adjustment it is very important to find a reasonable signal and reference The signal source can be either a calibrator with voltage and current output and adjustable frequency and phaseshift or the applicatio
52. 3 6 9 12 ON OFF SUPPLY OUT1 OUT2 OUT3 Z m A e Be T cE Figure 135 precision high voltage divider HST12 3 7 1 1 A Safety warning The normal use of the HST3 6 9 12 series needs a connection to high voltages To fulfill the safety requirements it is under all conditions absolutely necessary to earth the case of the HST3 6 9 12 to obtain safety and functionality Use sufficient cross section of the earthing conductor Please refer to chapter 1 1 Safety precautions 7 1 2 General The wide band precision high voltage divider of series HST expand the voltage measuring range of ZES ZIMMER precision power meter LMG for use at power grid of nominal voltage over 1000V The high voltage inputs are equipped with 2m leads that is attached to the voltage measured against earth The open leads can be aligned by the customer The HST 3 resp HST6 9 12 divides DC AC or any distorted voltages with very high accuracy by the factor 1000 resp 2000 3000 4000 The divided voltage is available at the buffered low impedance BNC output To avoid noise interference it is recommended to use shielded cables to the measuring input of the LMG The HST can be delivered in one two or three channel version as to match the particular measuring task ZES ZIMMER 195 218 Sensors and Accessories for precision power meters Voltage sensors The single phase HST is used in single ended systems e g overhead traction line ultr
53. 5 285 52 M6 9mm deep Make in mm Dimensions in mm 10mm 10mm 10mm 10mm 10mm 160mm Figure 28 LMG Z562 Z570 suitable bus bars ZES ZIMMER 45 218 Sensors and Accessories for precision power meters Current sensors P1 K S1 k P2 L S2 Figure 29 LMG Z562 Z570 connection diagram 2 13 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test If no burden is connected secondary terminals have to be short circuited Please refer to chapter 1 1 Safety precautions 2 13 2 Specifications Measuring range Secondary current Transformation ratio Maximum input overload Rated short time thermal current for 1s Bandwidth Nominal burden Protection class Degree of pollution Temperature range Bus bar Output connection 2 13 3 Accuracy 20 C to 50 C 19kg 3x 160mm x 10mm primary fixing device M5 slotted headless screw max 2 5Nm screw terminals M5 Philips recessed head screw max 4mm 2 flexible 6mm 2 solid tightening torque 3 5Nm Accuracies based on sinusoidal current ambient tempera
54. 500 not necessary because of good current dynamic range of LMG500 ZES ZIMMER 155 218 Sensors and Accessories for precision power meters LMGS00 connection cables and adapter 5 LMG500 connection cables and adapter Figure 104 L50 Z14 The special design of all LMG500 sensors makes them very easy and comfortable to use The HD15 SUB D plug contains the identification of the sensor type the measuring ranges including the needed scaling and several more parameters The LMGS500 reads this values and the meter will automatically configured to the optimum adjustments for using this special sensor The LMG range setup is automaticaly taken from the sensor EEPROM Further on we correct some of the sensor errors transfer error delay time So you get the best measuring results with each sensor For all LMG500 sensors the Adapter L50 Z14 is needed because internally it is necessary to connect the system ground CPU Sensor supply with the ground of the measuring channel Both signals are connected with a HD15 SUB D plug without galvanic separation The adapter L50 Z14 guarantees that no measuring leads are connected to the measuring channel at the same time and prevents electrical shock ZES ZIMMER 157 218 Sensors and Accessories for precision power meters Accessories 6 Accessories 6 1 Shielded DSUB9 extension cable male female LMG Z DVxx DSUB9 m Figure 105 Shielded DSUB9 extension cable LMG Z D
55. 60 Hz Use LMG Z325 and LMG specifications to calculate the accuracy of the complete system 2 5 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 5 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 5 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 5 7 Connection of the sensor with LMG450 Use direct current inputs I and I 2 5 8 Connection of the sensor with LMG500 Use direct current inputs I and I ZES ZIMMER 27 218 Sensors and Accessories for precision power meters Current sensors 2 6 AC current clamp 1000A 1A LMG Z322 Figure 9 LMG Z322 31 2 Safety laboratory m plugs 2x4mm Figure 10 Dimensions of the LMG Z322 2 6 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Please refer to chapter 1 1 Safety precautions 2 6 2 Specifications Nominal input current Transformation ratio ZES ZIMMER 28 218 Sensors and Accessories for precision power meters Current sensors 2 6 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3
56. 61010 1 and was constructed for voltages up to 250V CAT IIL ZES ZIMMER 167 218 Sensors and Accessories for precision power meters Accessories 6 5 Adaptor for measurement at IEC connector devices LMG MAK1 Figure 112 Adaptor for IEC connector devices LMG MAK1 6 5 1 A Safety warning Please refer to chapter 1 1 Safety precautions 6 5 2 General The MAK1 is an adaptor for measuring at single phase devices with IEC inlet connector up to 10A It was developed for the instrument series LMG90 and LMG95 but you can also connect other instruments like LMG310 LMG450 or LMGS500 The supply is done by a IEC inlet cord which must be connected to the MAK1 The load is connected by the fixed mounted cord With the MAK1 you can measure the voltage jacks U and U The current is also accessable from I to I This jacks have to be connected to the jacks of the measuring instrument Important If you dont want to measure the current the jacks I and I have to be short circuit to enable the current to flow The internal wiring is done so that the load is measured with correct current This wiring is perfect suited for the measurement of stand by power An important point is the safety The MAK1 is in compliance with IEC61010 1 and was constructed for voltages up to 300V CAT III ZES ZIMMER 168 218 Sensors and Accessories for precision power meters Accessories 6 6 Adaptor for measurement at 16A 3phase device
57. A f 50Hz Q 45 P 16 2635kW range 37 5kW range peak value 187 6kW AC coupling mode for the signal is selected what means you have no errors because of the DC offset of the signal From the table above the following errors of the LMG95 itself for voltage and current can be determined using the peak values of the respective measuring range AU 0 01 of Rdg 0 02 of Rng 0 023V 0 08V 0 103V AI gos 0 01 of Rdg 0 02 of Rng 0 01A 0 0938A 0 1038A ZES ZIMMER 205 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base AP LM cos 0 015 of Rdg 0 02 of Rng 0 00244kW 0 03752kW 0 03996kW Additional to these three errors there is the error caused by the current clamp First the amplitude error which will be added to the Al aos AL 1 5 of rdg 1 5A clamp So you get a total current error of Al iat Al FAT imp 1 6038A total LMG95 clamp The second error which is caused by the clamp is the error of the additional phase shift of 2 This error will influence the active power In this example the power can be calculated as P U I coso So the total differential gives you the error AP ramp P say P A ko lou dl Op you get AP shiny L Cos AU U cos p AT na U I sin p Ag At this point only the errors of the clamp are used the errors of the LMG are al
58. Accessories for precision power meters Accessories case A signal leads electrically by 90 to B signal This equates usually to clockwise rotation when looking onto the encoder shaft 6 9 4 Ripple As a matter of principle of frequency to voltage conversion there is a ripple at low revolution on output voltage Built in filters are optimised for short settling time without overshooting In case that remaining ripple is too high this can be reduced with the settings of LMG for example e Select adjustable lowpass filter in measuring channel e Extend the measuring cycle time e Average over a couple of measurement cycles Selection of the filter is always a compromise of fast reaction on variation of input signal and reduction of ripple on output signal The user can find optimal setting weighing these antithetic approaches 6 9 5 Incremental encoders with two 90 degree phase shifted pulse outputs Postmen ob ine side Unit Left most Left Right Right most switch adjacent of 1 min 144000 576000 2304000 9216000 revolution speed Specified tolerance of m value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 of m range Nake pulse amu 2400 9600 38400 153600 frequency using Formula for Scale rma 1152000 Z 1152000 Z 1152000 Z 1152000 2 Z is the number of EL per rotation of the used incremental encoder speed es ZES ZIMMER 174 218 Sensors and Accessories for precision power meters Accessories
59. C to 2kHz at 45 to 66Hz at IkHz Use L45 Z26 and LMG specifications to calculate the accuracy of the complete system 2 8 4 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 8 5 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 8 6 Connection of the sensor with LMG450 Use sensor input internal supply via LMG you get the following ranges 2 8 7 Connection of the sensor with LMG500 Use L50 Z14 internal supply via LMG you get the following ranges ZES ZIMMER 33 218 Sensors and Accessories for precision power meters Current sensors 2 9 AC current clamp 3000A 1A LMG Z329 2m Safety laboratory L plugs 2x4 mm Figure 16 Dimensions of the LMG Z329 2 9 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Please refer to chapter 1 1 Safety precautions 2 9 2 Specifications Nominal input current Transformation ratio ZES ZIMMER 34 218 Sensors and Accessories for precision power meters Current sensors Temperature range 5 C to 50 C 2 9 3 Accuracy Accuracies based on sinusoidal current amb
60. Figure 24 LMG Z542 Z545 Z550 suitable bus bars ZES ZIMMER 42 218 Sensors and Accessories for precision power meters Current sensors P1 K autee A between P1 K and S1 k marked with an arrow S1 k P2 L S2 Figure 25 LMG Z542 Z545 Z550 connection diagram 2 12 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test If no burden is connected secondary terminals have to be short circuited Please refer to chapter 1 1 Safety precautions 2 12 2 Specifications Measuring range Secondary current Transformation ratio Maximum input overload Rated short time thermal current for 1s Bandwidth Nominal burden Protection class Degree of pollution Temperature range Weight Bus bar Output connection 4000Aeff continuous 2Aeff 2000 1 2x 100mm x 10mm or 3x 80mm x 10mm or round diameter 83mm screw terminals M5 Philips recessed head screw max 4mm 2 flexible 6mm 2 solid tightening torque 3 5Nm ZES ZIMMER 43 218 Sensors and Accessories for precision power meters Current sensors 2 12 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transformer Amplitude error of measuring value Phase error at 48 to 66Hz Current Z542 Z545 Z550 20A to 100A lt 0 1 lt 0 1 lt 0 15 lt 0 1 lt 0 3 lt 0 15
61. IMMER 172 218 Sensors and Accessories for precision power meters Accessories 6 9 Adapter for incremental rotation speed encoders L45 Z18 F ZH Figure 119 L45 Z18 6 9 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 6 9 2 General This plugon adapter for LMG450 converts pulses of common industrial incremental encoders with two 90 degree phase shifted pulse outputs into analogue voltage This voltage can be analysed graphically with high temporal resolution by using sensor input of LMG450 Compared to this digital encoder input of process signal interface provides only one value each measuring cycle and with L45 Z18 you get a fast high dynamic response to changes in rotation speed 6 9 3 Description Incremental encoders speed sensors with TTL technology supply 5V and GND or HTL technology supply 5V and 5V can be connected There are four colour coded measuring ranges of the adapter to align with different pulse rates Z of the incremental encoder and maximum revolutions per minute Nmax Attention Read measuring value Idc only this presents exact speed values according to absolute value and sign depending on sense of rotation Positive output voltage is seen in ZES ZIMMER 173 218 Sensors and
62. JES ZIMMER Electronic Systems ZES Sensors and Accessories for precision power meters LMG series ZES current and voltage sensors and accessories This data book is the technical dokumentation of the current and voltage sensors from ZES ZIMMER Electronic Systems GmbH to enlarge the measuring ranges of the power meters series LMG The first section of this paper gives an survey of all ZES current sensors and the safety precautions Selection table and several arguments should help you to find a suitable sensor family or fill out the support request form The second section is about the general current sensors which you can use with every precision power meter of the LMG series In the following sections the special sensors wiring cables and accessories for the different precision power meters are described Then you find a chapter with the precision high voltage divider for meters of the LMG series The last section with frequently asked questions will help you to optimize the accuracy and give you some hints for the usage of our sensors But in all cases if you need more information or detailed support for your application please don t hesitate to contact us the engineers of ZES ZIMMER will help you Copyright 2011 No part of this document may be reproduced in any form or by any means without the permission in writing from ZES ZIMMER Electronic Systems GmbH We reserve the right to implement technical changes at any time
63. MG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 1 8 Connection of the sensor with LMG450 Use the sensor input you get the following ranges 2 1 9 Connection of the sensor with LMG500 Use L50 Z14 you get the following ranges ZES ZIMMER 19 218 Sensors and Accessories for precision power meters Current sensors 2 2 Active error compensated AC current clamp 40A L45 Z06 Z07 15 HDSUBISM to LMG 22 G 112 Figure 3 Dimensions of the L45 Z06 2 2 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 2 2 2 Specifications Nominal input current 40A Max trms value 80A Measuring range current clamp 120Apk Maximum input overload capability 500A for 1s Bandwidth 5Hz to 50kHz weg 2 2 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp The values are in of measuring value of measuring range current clamp and in phase error in degree Influence of coupling mode This current clamp can transfer only AC currents The compensation circuit may cause a DC signal wich is interpreted by the instrument as a DC current This coul
64. R 57 218 Sensors and Accessories for precision power meters Current sensors 2 16 2 Specifications Bandwidth small signal 0 5 of nominal input current 1dB DC to 150kHz 3dB DC to gt 500kHz Slew rate 10 90 gt 100A us Response time to 90 of lt lus nominal input current Burden Rb 0 30 ohms Isolation e rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 2000V with IEC 61010 1 standards and following conditions over voltage category III pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 5 4kV impuls withstand voltage 1 2 50us 9 9kV rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 1000V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 11mm clearance distance 11mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact 2 16 3 Accuracy Accuracies based on sinusoidal current frequency DC to 100Hz ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer ZES ZIMMER 58 218 Sensors and Accessories for precision power meters Current sensors Amplitude error Phase error of meas value of measuring range PSU PSU200 0 015 0 005 See specification of the LMG connection cable for the LMG measur
65. Sensors and Accessories for precision power meters Current sensors input current overload bandwidth DC to 10kHz protection class 600V CAT III degree of 2 pollution temp range 0 C to 40 C weight 150g output Security BNC cable and adapter connection 2 31 4 Connection of the sensor with LMG90 310 The use with LMG90 is not possible With LMG310 use Isensor external Shunt input 2 31 5 Connection of the sensor with LMG95 Use external Shunt input you get the following ranges all in A lohm aom esom 500m don t use the upper ranges outside accuracy specification 2ohms don t use the upper ranges outside accuracy specification Sohms don t use the upper ranges outside accuracy specification 10ohms ZES ZIMMER 138 218 Sensors and Accessories for precision power meters Current sensors EME don t use the upper ranges outside accuracy specification 20ohms Som dont use the upper ranges outside accuracy specification 50ohms don t use the upper ranges outside accuracy specification 1000hms don t use the upper ranges outside accuracy specification 200o0hms don t use the upper ranges outside accuracy specification 2 31 6 Connection of the sensor with LMG450 The use with LMG450 is not possible 2 31 7 Connection of the sensor with LMG500 Use external sensor input you get the following ranges
66. U4 Connect all of the 15 pins and the shield at the LMG cable plug together and connect all of the 9 pins and the shield at the SSU4 cable plug together To do this the load current has to be switched off 2 19 5 Connection of the sensor with LMG90 310 or other instruments with current input Use sensor suppy unit SSU4 and PSU K3 K5 K10 and SSU4 K L31 and direct current inputs I and I 2 19 6 Connection of the sensor with LMG95 You can use PSU600 K3 L95 supply via LMG95 no additional error terms but only two ranges and not suitable for small currents With slightly less accuracy at fullrange but with considerably more dynamic range and so better accuracy at small currents it is better to use PSU600 BURIS5 It depends on the magnitude and the dynamic of the measuring current which connection is better ZES ZIMMER 76 218 Sensors and Accessories for precision power meters Current sensors 2 19 6 1 PSU600 K3 L95 DSUBIM to LM Gos violet T ta LMGSS Ix Figure 50 PSU600 K3 L95 for direct connection of the PSU600 to the current input of the LMG95 ot LMG95 z j ia san f O E E erir e E Freeze 1 an N kaa a fe A k a gi Precision Power Met TEIS Transducer Supply O a rr aN NW etme O j SA anl ai
67. Vxx 6 1 1 A Safety warning Attention No safety isolation working voltage max 50V When using Busbar without isolation or other not insulated items assure safety distance between the extension cable and hazardous voltages Please refer to chapter 1 1 Safety precautions 6 1 2 General This is a high quality very well shielded DSUB9 extension cable high immunity against EMC It is screwable with UNC4 40 threads at both connectors It can be used to extend the cable length of the PSU connection cables In this case it is used between the precision current sensor PSU60 200 400 600 700 and the LMG specific connection cable to the LMG 6 1 3 Specifications No safety isolation working voltage max 50V DSUB9 male DSUB9 female 1 1 Cable length user selectable 3m or 5m or 10m or 15m ZES ZIMMER 159 218 Sensors and Accessories for precision power meters Accessories 6 2 Sensor supply unit for up to 4 current sensors SSU4 The SSU4 is a supply unit to feed up to 4 pieces of current sensors Each sensor can be supplied with 15V 500mA 15V 500mA at the same time The transducers are connected to the four 9 pin SUB D connectors Depending on the sensor the output signal can be accessed directly from the sensor or via the 15 pin SUB D connector 6 2 1 Technical data Mains supply 85 264V 47 440Hz ca 40W Fuse 5x20mm T1A 250V IEC127 2 3 IP20 according DIN40050 Protection class I Mains supply Overvol
68. Z 28 HALLXxxX 0000008 109 2 25 Hall current sensors 300 500 1k 2kA L45 Z29 HALLxxX 0008 112 2 26 Hall current sensors 300 500 1k 2kA L50 Z29 HALLxx 0008 116 2 27 Rogowski flex sensors L45 Z32 FLEXXX ccccsccceessecceesseeeeeeeeeseaes 119 2 28 HF summing current transformer L95 Z06 eeeseeceeeseeeeeeneeeeeees 122 2 29 Highvoltage HF summing current transformer L95 Z06 HV 127 2 30 Low current shunt LMG SHXxX ccccccsssssssessseseseseseeeseseseseeeeees 132 2 31 Low current shunt with overload protection LMG SHxx P 137 2 32 Precision wideband current transformer WCT100 LMG Z601 142 ZES ZIMMER 3 218 Sensors and Accessories for precision power meters 2 33 Precision wideband current transformer WCT1000 LMG Z602 145 3 LMG95 connection cables and adapter cccceeesseceeeeneeeeeenees 149 3 1 Adapter for the use of HD15 Sensors with LMG95 L95 Z07 149 3 2 Connect PSU60 200 400 700 to LMG95 PSU60 200 400 700 K L95 151 4 LMG450 connection cables and adapter eccceeeessceeeesteeeeeees 153 4 1 BNC adapter to sensor input HD15 without EEPROM L45 Z09 153 4 2 Adapter for isolated custom current sensors with 1A output L45 Z22 154 5 LMGS500 connection cables and adapter cceeeseceeeetteeeeeeeees 157 5 1 LMG500 current sensor adapter L50 Z14 ee eeeeceesseceeeseeeeeeeeeeeeae
69. a LMG95 or LMG450 Please do this in follwing order e Switch off both instruments and remove all cables e Remove the four feets of the LMG450 or LMG95 case To do this just remove the four screws The nuts are fixed inside the LMG450 or LMG95 e Remove the four feets of the SSU4 case The four screws are mounted into the four screw nuts which are accessable from the top of the case Remove also this nuts e With the four M4x55 screws which are added you mount now the four feets of the SSU4 with following orientation LMG95 mount the front feets in the 2 position from the front plate mount the rear feets in the 2 position from the rear plate LMG450 mount the front feets in the position closest to the front plate mount the rear feets in the position closest to the rear plate In both cases The small white rubber on the feets has to be mounted in direction to the rear front plate The four screws are fixed into the nuts of the LMG450 LMG95 bottom where the original feeds were fixed ear ae E ERGEN 00 OO ONO OG ON 06000 000 SEE 1O GO COC ome Oh YO SSS ile Ws Mgs OO 00 a ee 6EDO oe l lt P zae manm O erw TEs ee D Ga TOMMASO TANTO G800000000000000000 0000000000600820000 a jmi I
70. afety precautions ZES ZIMMER 183 218 Sensors and Accessories for precision power meters Accessories 6 12 2 System requirements hardware specifications Windows XP home Windows XP professional Windows 32bit or 64bit For other operating systems including Windows 98 2000 NT Vista Linux Debian Mandriva RedHat Suse Ubuntu see http www digi com gt support gt drivers and download the driver appropriate for your operating system for Digi Connect SP auto sensing to 10 100 Mbit s Ethernet throughput up to 230 400 baud data flow control with RTS CTS hardware reset with break data throughput with LMG95 450 500 binary mode about 3000 measuring values trms ac dc harmonics flicker sample values per second ascil mode about 1000 measuring values per second 6 12 3 Connection of the adapter L95 Z318 with LMG95 Plug the connector of L95 Z318 labeled with to LMG s COM B conn to the LMG95 COM B jack Plug the connector of L95 Z318 labeled with supply to the LMG95 auxilary transducer supply jack if your application uses the supply jack e g for PSU600 then use LMG Z318 with external supply via wall wart Switch on the power meter and connect the LAN cable assure that the LMG firmware is 3v136 or newer 6 12 4 Connection of the adapter L45 Z318 with LMG450 Plug the connector of L45 Z318 labeled with to LMG s COM B conn to the LMG450 COM B jack
71. allation dimension L x 490 x 230 x 110 590 x 230 x 110 W x H in mm approx 6 1kg approx 7 2kg supply 85 265V 45 65Hz ca 20V A 7 1 4 Overvoltage capabilities of high voltage input against earthed case For serial numbers starting with E maximum DC or 50 60Hz trms working voltage 4 2kV 8 4kV 12 6kV 16 8kV maximum periodic peak working voltage 6kV 12kV 18kV 24kV Non repetitive maximum peak voltage 15 2kV 26 2kV 36kV_ 45 3kV Note The working and transient voltages are calculated in accordance to EN61010 2001 valid for max altitude 2000m over sea level ZES ZIMMER 197 218 Sensors and Accessories for precision power meters Voltage sensors 7 1 5 Measurement principle HST Out Out Out2 Out1 Out2 Out3 Figure 136 principle structure of different HST types 7 1 6 Example wirings High voltage wire BNC sockets CH3 CHS UW1 W1 2000 U2 W2 2000 Figure 137 example wirings HST6 2 Two possible example wirings are shown A two channel measurement in the upper part of the figure and a differential voltage measurement in the lower part of the figure ZES ZIMMER 198 218 Sensors and Accessories for precision power meters Voltage sensors 7 1 7 HST wiring of 3 phase systems 3 phase system mains or inverter L1 frequency L3 g a
72. and voltage 1 2 50us 19 9kV rated isolation voltage rms reinforced isolation 1250V rated isolation voltage rms single isolation 2500V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 25mm clearance distance 25mm comparative tracking index CTI 100V Attention when using Busbar without isolation regard output cable isolation or avoid contact weight transducer head approx 4 5kg supply rack approx 5kg 2 23 11 Specifications SAT5000 nominal input current 2500Apk to 5000Apk user selectable in 250Apk steps please specify at order transformation ratio depends on programming adapter max nominal input current 1250 1 2500 1 overload capacity 50kA for 100ms DC accuracy offset error lt 2ppm offset stability no load lt lppm month linearity error lt 3ppm temperature coefficient of I 10 C 40 C lt 0 1ppm K ZES ZIMMER 106 218 Sensors and Accessories for precision power meters Current sensors Use SATS000 and LMG specifications to calculate the accuracy of the complete system bandwidth 3dB lt 0 5 Inom DC 50kHz dynamic response di dt slew rate 10 90 gt 20A us delay time lt lus busbar fee zone t 450m 225m isolation characteristics e rated isolation voltage rms reinforced isolation 1250V rated isolation voltage rms single isolation 2500V with IEC 61010 1 standards and following condition
73. apterbox to remove possible given prior IP address and wait for about 1 minute before searching again This is the most important point in the installation If the wizard still can not find the Z318 in your LAN please ask your system administrator before you contact the support hotline of ZES The support engineers of ZES will need a lot of detailed information about your local network to consult e Ifthe wizard found one or more devices choose the appropriate one and press next e Take care that Z318 gets the same IP address after its next startup Configure your local DHCP server that the fix MAC address of Z318 gets everytime the same IP address or set a fix and free IP address manually This is important because in the next step you assign a virtual COM port to this IP address and if the IP address was different after the next startup the virtual COM port would be not available ZES ZIMMER 185 218 Sensors and Accessories for precision power meters Accessories e Select add a new device It might be necessary to remove previous installed drivers with remove an existing device Digi RealPort Setup Wizard Welcome to the Digi RealPort Setup Wizard This wizard will help you to manage Digi RealPort on your system Digi s patented RealPort software enables your application to access your serial device over the network as if it is connected to a local COM port Please select an option C Remove an E
74. ards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions ZES ZIMMER 68 218 Sensors and Accessories for precision power meters Current sensors 2 18 2 Specifications Bandwidth small signal 0 5 of nominal input current 1dB DC to 150kHz 3dB DC to gt 500kHz Slew rate 10 90 gt 80A us Response time to 90 of lt lus nominal input current Isolation e rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 2000V with IEC 61010 1 standards and following conditions over voltage category III pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 5 4kV impuls withstand voltage 1 2 50us 9 9kV rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 1000V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 11mm clearance distance 11mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact 2 18 3 Accuracy Accuracies based on sinusoidal current frequency DC to 100Hz ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer ZES ZIMMER 69 218 Sensors and Accessories for precision power meters Current sensors Amplitude error Phase error
75. are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU400 head and the screws are sealed when you have ordered the package PSU400 L435 This should prevent that the wrong PSU400 head is connected to the cable The connection is quiet simple e Switch all power off and plug the connector labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG450 to the LMG450 external sensor input e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least ZES ZIMMER 71 218 Sensors and Accessories for precision power meters Current sensors Measuring ranges sensor input limited by PSU400 to max 400Apk Accuracy Use PSU400 and LMG450 specifications to calculate the accuracy of the complete system Add 60mA to the primary current DC offset tolerance 2 18 8 Connection of the sensor with LMG500 PSU400 K L50 Use PSU400 K L50 and L50 Z14 supply via LMGS500 PSU400 K L50 Bre f ica r 2 5M Figure 48 PSU400 K L50 to connect PSU400 and LMG500 This cable PSU400 K L50 is used to connect a precision current sensor PSU400 to the power meter LMGS500 In the connector to the LMG500 the adjustment data of the PSU400 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU400 head and the scre
76. asonic applications Line to line voltages can be measured as difference between the output signals of the channels For floating difference voltage measuring therewith the 2 phase HST is best suitable Typical application fields for the 3 channel HSTx 3 are frequency inverter fed medium voltage drives and power quality analysis at the distribution network 7 1 3 Specifications ordering type HST HST HST HST HST HST HST HST HST HST HST HST 2 3 2 AE maximum trms input value 4 2kV 8 4k V 12 6kV 16 8kV maximum peak 10kV 15kV 20kV maximum sine 7kV 10 5kV 14kV trms value for full scale 10MOhmsll50pF 20MOhmsll25pF 30MOhmsll22pF 40MOhmsll20pF 1 1000 1 2000 1 3000 1 4000 accuracy frequency range tolerance of ratio tolerance of phase DC max 0 1 0 05Hz 45Hz max 0 1 0 06 45Hz 65Hz max 0 05 0 06 65Hz 2 5kHz max 0 1 0 2 2 5kHz 10kHz max 0 2 0 4 10kHz 10OkHz max 0 3 0 5 300kHz max 100pF burden typ 2 Zo measurement one fixed high voltage lead length 2m for each channel input earth jack as the common reference point one BNC socket for each channel min lkohms max InF ZES ZIMMER 196 218 Sensors and Accessories for precision power meters value for full scale 5kV Voltage sensors class I Device must be earthed additional to mains supply temperature range size Lx W x H in mm 330 x 230 x 110 400 x 230 x 110 inst
77. ation interval 1 year conductor in the middle of the transducer Amplitude error of meas value of measuring range PSU DC to 100Hz 0 015 0 005 100Hz to 2 5kHz 0 015 0 005 2 5kHz to 10kHz 0 05 0 025 10kHz to 30kHz 0 6 to 0 2 See specification of the LMG connection cable for the LMG measuring ranges and to calculate the accuracy of the complete system 2 19 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit ZES ZIMMER 75 218 Sensors and Accessories for precision power meters Current sensors To remove the LMG supply unit from the test location without removing the PSU sensors from the current path you can do alternatively e Leave the PSU at the current path and disconnect the cable at the PSU side Disconnect the DSUB9 plug from the PSU and interconnect all of the 9 pins with the shield at the PSU plug or e Leave the PSU and the connection cable at the current path and disconnect the cable at the LMG supply unit side 1 Systems with supply via LMG Disconnect the HDSUB15 plug from the LMG and connect all of the 15 pins and the shield at the cable plug together 2 Systems with supply via supply unit SSU4 Disconnect the HDSUB15 plug from the LMG and disconnect the DSUB9 plug from the supply unit SS
78. ble as well as it s serial number For this reason this connector is delivered already mounted to the PSU700 head and the screws are sealed when you have ordered the package PSU700 L4S This should prevent that the wrong PSU700 head is connected to the cable The connection is quiet simple e Switch all power off and plug the connector labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG450 to the LMG450 external sensor input e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least ZES ZIMMER 85 218 Sensors and Accessories for precision power meters Current sensors Measuring ranges sensor input limited by PSU700 to max 700Apk Accuracy Use PSU700 and LMG450 specifications to calculate the accuracy of the complete system Add 105mA to the primary current DC offset tolerance 2 20 8 Connection of the sensor with LMG500 PSU700 K L50 Use PSU700 K L50 and L50 Z14 supply via LMGS500 PSU700 K L50 d A p 25m PSU700 Figure 59 PSU700 K L50 to connect PSU700 and LMG500 This cable PSU700 K L50 is used to connect a precision current sensor PSU700 to the power meter LMG500 In the connector to the LMG500 the adjustment data of the PSU700 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU700 head and the screws are
79. connect the sensor first to the meter and afterwards to the device under test If no burden is connected secondary terminals have to be short circuited Please refer to chapter 1 1 Safety precautions 2 11 2 Specifications Bus bar 1x 60mm x 10mm or 2x 50mm x 10mm or 1x 40mm x 34mm or round diameter 51mm primary fixing device M4x40 slotted headless screw max 2Nm Output connection screw terminals M5 Philips recessed head screw max 4mm2 flexible 6mm 2 solid tightening torque 3 5Nm ZES ZIMMER 40 218 Sensors and Accessories for precision power meters Current sensors 2 11 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transformer Amplitude error of measuring value Phase error at 48 to 66Hz Current Z502 Z505 Z510 Z520 7 5A to 37 5A lt 0 05 lt 0 1 lt 0 1 lt 0 1 lt 0 3 lt 0 15 lt 0 5 lt 0 3 37 5A to 150A lt 0 03 lt 0 07 lt 0 07 lt 0 07 lt 0 15 lt 0 1 lt 0 3 lt 0 2 150A to 375A lt 0 02 lt 0 05 lt 0 05 lt 0 05 lt 0 1 lt 0 08 lt 0 2 lt 0 16 375A to 900A lt 0 02 lt 0 04 lt 0 05 lt 0 04 lt 0 1 lt 0 06 lt 0 2 lt 0 12 900A to 1500A f lt 0 02 lt 0 05 lt 0 05 lt 0 05 lt 0 1 lt 0 08 lt 0 2 lt 0 16 at 30Hz to 48Hz and 66Hz to 440Hz twofold errors at 15Hz to 30Hz and 440Hz to 5kHz threefold e
80. ctor not to the same active power which should be both nearly the same conclusion because every current sensor has also slightly gain errors To compensate a small gain error with delay adjustment will lead to spurious measuring results The power factor does not depend on gain errors so its is better to use this value not to mix gain adjustment with phase adjustment To understand this take a look at pure sinewave signal for voltage and current PF P S Utrms Itrms cos phi Utrms Itrms cos phi Utrms and Itrms can be truncated For very high frequency signal it is best to use not more than 5Aeff because the bandwidth and phase accuracy of this range 20mA to 5A is the best I 3 PUT L I I a U Ee rr TT n Az1 2 3 4 Sense Hore UJ y a lAz1 2 3 Sense Hore duU ns_ dI ns PZW y dU ns_ dI ns PZW 8 8 865 W 0 00039 c fh 8 6 864 W 6 68838 c 280 8 863 W 6 68837 c 8 8 00088 Y 8 6 60888 W 8 8 652 W 8 08388 c 8 8 080088 Y 8 8 080088 Y vooo Snow F ON a 1 2 3 h 5 6 17 88 Figure 144 LMG500 before delay compensation left with succsessfull delay compensation of 280ns right The current transducer in the example above has a signal delay of 280ns this is compensated with a delay setting of 280ns see the power factor PF and active power P The current transducer delay or phase error is not necessarily positive so at higher frequency the phase shift of a passive current transformer is
81. d cause additional errors Therefore this clamp should only be used with the LMG setting AC coupling The accuracies are only valid for this case ZES ZIMMER 20 218 Sensors and Accessories for precision power meters Current sensors Frequency 5Hzto 10Hzto 45Hzto 65Hzto 1kHz to 5kHz to 20kHz to 10Hz 45Hz 65Hz 1kHz 5kHz 20kHz 50kHz pose 6 3 os os 2 6 Use L45 Z06 and LMG specifications to calculate the accuracy of the complete system Earthing jack The earthing jack of this clamp can be used to connect the core of the clamp with earth potential By this you can reduce the errors caused by capacitive coupling of the very steep voltage signal for example at the output of frequency converters very much In all other applications it is not necessary to connect this jack 2 2 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG 2 2 5 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 2 6 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 2 7 Connection of the sensor with LMG450 Use the sensor input you get t
82. ds to the device under test Please regard that there is no isolation inside the Sensor therefore the instrument needs isolated inputs The Sensor is suitable for LMG95 LMG500 and LMG310 but not for LMG450 Please refer to chapter 1 1 Safety precautions 2 31 2 Selection of the resistance value Select an applicable shunt resistance according to the necessary load current range Values between 1 ohm and 200 ohms are available But take into concern that this shunt resistance is connected in series to your device under test Oversized resistors may distort and take influence on the load current 2 31 3 Specifications Accuracy The specified accuracy is valid in combination with the LMG95 LMG500 sensor input impedance of 100kOhm and the correct setting of the scaling ratio see table Accuracies based on sinusoidal current frequency 45 65 Hz ambient temperature 23 3 C calibration interval year The values are in of measuring value Use LMG SHxx P and LMG specifications to calculate the accuracy of the complete system nominal 10 20 50 100 200 resistance Aa ra re ohms ohms ohms ohms ohms scaling ratio ratio 1 00001 0 50001 0 20001 0 10001 0 05001 0 02001 0 01001 0 00501 accuracy o ee 15 03 3 maximum peak 710 350 140 70 35 10 2 5 input current for mApk mApk mApk mApk mApk mApk ae mApk specified accuracy 20A overload protection for max 1 minute ZES ZIMMER 137 218
83. e accuracy of the complete system Add 9mA to the primary current DC offset tolerance 2 15 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is out of responsibility of ZES ZIMMER ZES ZIMMER 56 218 Sensors and Accessories for precision power meters Current sensors 2 16 Precision current transducer 200A PSU200 Figure 38 PSU200 LED NORMAL OPERATION 9 POLE D SUB MALE 15 6 L 4x 4 5 MOUNTING HOLES 2x 5 5 MOUNTING HOLES Mia 3R cy b Figure 39 Dimensions of the PSU200 2 16 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions ZES ZIMME
84. e connected to the SSU4 sensor supply unit For each channel there is one connector 0 o o o o No o o o 7 ri Connector to the sensors ZES ZIMMER 161 218 Sensors and Accessories for precision power meters Accessories 5 SV mex S00mA SSCS 6 Curent ouput signal ofthe sensor max SOMA Not used Do not connect Signal input to indicate a proper operation of the sensor 15V or n c The red LED is on GND The green LED is on 9 15 V max 500mA The current output signal of the sensor is connected via a 2 7Q resistor to the corresponding channel of the 15 pin connector for the instrument When the current returns from the instrument it is fed into ground 6 2 3 2 15 Pin SUB D connectors for the measuring instrument Via the following connector the measuring instrument can be connected to the sensor supply unit 10 9 15 14 13 12 11 Connector to the instrument Current output channel 1 Current output channel 2 Current output channel 3 Current output channel 4 The output current of each channel can be measured and has then to be returned to Ground ZES ZIMMER 162 218 Sensors and Accessories for precision power meters Accessories 6 2 4 Mounting 6 2 4 1 Rack mounting Fix the two rack mounting metal sheets with the four screws at the two sides of the SSU4 case Now you can mount it into any 19 rack 6 2 4 2 Instrument mounting You can mount the SSU4 directly under
85. e under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions Sensors and Accessories for precision power meters 82 218 ZES ZIMMER Current sensors 2 20 2 Specifications Bandwidth small signal 0 5 of nominal input current 1dB DC to 50kHz 3dB DC to gt 100kHz Slew rate 10 90 gt 100A us Response time to 90 of lt lus nominal input current Isolation e rated isolation voltage rms reinforced isolation 300V rated isolation voltage rms single isolation 1600V with IEC 61010 1 standards and following conditions over voltage category III pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 4 6kV impuls withstand voltage 1 2 50us 8 5kV rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 1000V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 9mm clearance distance 9mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact 2 20 3 Accuracy Accuracies based on sinusoidal current frequency DC to 100Hz ambient temperature 233 C calibration interval 1 year conductor in the middle of the transducer ZES ZIMMER 83 218 Sensors and Accessories for precision power meters Current sensors Amplitude error Phase error of meas value of
86. ell as the power of each phase Instruments without star delta conversion are connected like shown in the lower part of the drawing The line voltages with reference potential earth can be tapped directly at the BNC jacks Even with unbalanced sources the total power is determined correctly 7 1 8 Included in delivery e precision high voltage divider HST ZES ZIMMER 199 218 Sensors and Accessories for precision power meters Voltage sensors e about 3m BNC connection cable from HST to the power meter LMG e adapter BNC to 4mm plugs 7 1 9 Option mounting clips HST Z01 Z02 This Option has to be specified at the order respectively a refitting can be only made by ZES ZIMMER 10 2 5 Figure 139 HST mounting clips Dimensions in mm b Figure 140 HST Z01 g b J Figure 141 HST Z02 ZES ZIMMER 200 218 Sensors and Accessories for precision power meters Voltage sensors Opin ooo ooo HST Z01 180mm 380mm HST Z01 180mm 450mm 7 1 10 Option HST O1 supply connection via IEC320 connector Supply connection mating to commonly used IEC 320 C13 appliance connectors supply cord of HST Figure 142 HST O1 ZES ZIMMER 201 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 FAQ frequently asked questions Knowledge base 8 1 The Burden resistor For measurements with the specified accuracies the burd
87. en of a sensor has to be between 50 and 100 of the rated burden in the data sheet at the rated frequency range This burden can be given as ohmic resistor or as an apparent power value Here an example how you can convert the two values The burden resistor is built up from the ohmic load of the cables and additional from the burden of the meter The sensor will not work at the specified accuracy if the operation burden is not reached Because of the very low consumption of the elektronic meter inputs the rated operation burden is mostly not reached and an additional operation resistor has to be fitted This resistor can also be built up from a correctly dimensioned connection cabel from the sensor to the meter Reable Radditional CT Rieter Reable ohmic value of the cable Radditional additional ohmic resistor may be cable Rmeter ohmic value of the meter input CT current sensor ZES ZIMMER 203 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 1 1 Example Sensor Cable 100A 5A 1 2m total length rated burden Ryate 2 5 VA p 0 0175 Q mm operation burden 50 of 2 5VA 3 a A 1 5mm 8 1 2 For the CT S _2 5VA The rated burden of the CT is Rira 100mQ I 5A gt R operation 50mQ Burden of the meter Sees 8mQ meter P Ti 5A 7 2 Ohmic value of the cable R P l e E saa aa Ta
88. ent input Use sensor suppy unit SSU4 with modification for PSU60 200 400 700 and PSU K3 K5 K10 and SSU4 K L31 and direct current inputs I and I ZES ZIMMER 84 218 Sensors and Accessories for precision power meters Current sensors 2 20 6 Connection of the sensor with LMG95 Use PSU60 200 400 700 K L95 supply via LMG95 no additional error terms but only one range and not suitable for small currents With slightly less accuracy at fullrange but with considerably more dynamic range and so better accuracy at small currents it is also possible to use PSU700 K L50 and L95 Z07 With this assembly you get 8 ranges and a good dynamic down to a few Amps but a small additional error term from the PSU700 K L50 cable Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 It depends on the magnitude and the dynamic of the measuring current which connection is better 2 20 7 Connection of the sensor with LMG450 PSU700 K L45 Use PSU700 K LA5 and SSU4 standard version without modification to PSU DSUBOf 2 5m Ng to LMG HDSUB15m tossu amp oem DSUBSF Ee Figure 58 PSU700 K L45 to connect the PSU700 to the LMG450 and the SSU4 This cable PSU700 K L4S is used to connect a precision current sensor PSU700 to a power meter LMG450 and to supply it by a sensor supply unit SSU4 In the connector to the LMG450 the adjustment data of the PSU700 head are availa
89. er Z318 http 192 168 x xx login htm with the username root and the password dbps Ce pok Figure 129 e Here you can manage the settings in a comfortable way e g check MAC Address IP Adress firmware update and so on ZES ZIMMER 187 218 Sensors and Accessories for precision power meters Accessories Digi Connect SP RS232 Configuration and Management Mozilla Firefox Datei Bearbeiten Ansicht Chrorik Lesezeichen Extras pife lt p cC dar O http j192 163 2 45 hone htm 2 SollFirefox dieses Passwort spel hem A Digi Connect SP RS232 Configuration and Management Getting Started Not sure what to do next This Tutorial can help Digi Connect SP R5232 192 168 245 00 40 9D 2E 37 1F Figure 130 6 12 9 Troubleshooting The following problems may appear while installing the ethernet adapter If the problem remains after checking the following points please contact ZES at sales zes com or 49 6171 628750 e please check all connections supply RS232 LAN in case of LMG Z318 and LMGx COMa use 1 1 serial cable no nullmodem e connect the ethernet adapter to the power supply press reset wait for about 1 minute and try again e switch off your antivirus protection software the firewall may block the communication ZES ZIMMER 188 218 Sensors and Accessories for precision power meters Accessories 6 13 USB RS232 Adapter LMG Z316 to power meter LMG via
90. eristics e rated isolation voltage rms reinforced isolation 1250V rated isolation voltage rms single isolation 2500V with IEC 61010 1 standards and following conditions over voltage category II pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 10 8kV impuls withstand voltage 1 2 50us 19 9kV rated isolation voltage rms reinforced isolation 1250V rated isolation voltage rms single isolation 2500V with EN50178 standards and following conditions over voltage category IIL pollution degree 2 creepage distance 25mm clearance distance 25mm comparative tracking index CTI 100V Attention when using Busbar without isolation regard output cable isolation or avoid contact weight transducer head approx 4 5kg supply rack approx 5kg 2 23 10 Specifications SAT2000hf DC accuracy offset error lt 2ppm offset stability no load lt lppm month linearity error lt 2ppm temperature coefficient of I 10 C 40 C lt 0 1ppm K Use SAT2000hf and LMG specifications to calculate the ZES ZIMMER 105 218 Sensors and Accessories for precision power meters Current sensors acer oe compeeiem isolation characteristics e rated isolation voltage rms reinforced isolation 1250V rated isolation voltage rms single isolation 2500V with IEC 61010 1 standards and following conditions over voltage category II pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 10 8kV impuls withst
91. ers Current sensors 2 19 Precision current transducer 600A PSU600 Figure 49 Dimensions of the PSU600 2 19 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions 2 19 2 Specifications Bandwidth small signal 0 5 of nominal input current 3dB DC to gt 100kHz Slew rate 10 90 gt 100A us Response time to 90 of lt lus nominal input current Burden 2 5 ohms ZES ZIMMER 74 218 Sensors and Accessories for precision power meters Current sensors Isolation rated isolation voltage rms reinforced isolation 300V rated isolation voltage rms single isolation 2000V with IEC 61010 1 standards and following conditions over voltage category III pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 4 9kV impuls withstand voltage 1 2 50us 9 1kV rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 1000V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 10mm clearance distance 10mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact 2 19 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibr
92. es 300 000A primary gt 0 3A secondary range 300mA gt range peak value 0 938A calculated back to the primary side range 100A gt range peak value 312 7A f 50Hz Q 45 P 16 2635kW range 25kW gt range peak value 125 080kW AU 0 01 of Rdg 0 02 of Rng 0 023V 0 08V 0 103V AI cos 0 01 of Rdg 0 02 of Rng 0 01A 0 06254A 0 07254A AP cos 0 015 of Rdg 0 02 of Rng 0 00244kW 0 02502kW 0 027456kW Al camp 0 75 of primary current in this case the reading 2 25A now with the clamp scaling this error is divided by 3 as well what means AL 0 75 of Rdg 0 75A clamp Al otal Al cos PAL cons 0 82254A Again the total differential has to be used but now with the following values ZES ZIMMER 207 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base AU 0 AI Alctamp Ox hess 2 aaa 360 With this the error of the clamp of the active power is AP samy 100 cos 0 0V 230V cos 0 75A ule 230V 100A sin 0 013 333 40W AP a AP gos AP ayy 0 027456kW 0 33340KW 0 360856KW The relative error of the active power is _ AP AP e 0 0222 2 22 relative With this simple trick the error of the current amplitude could be reduced by 51 2 The error of the active power even by 42 3 ZES ZIMMER 208 218 Sensors and Accessories for precisi
93. f the LMG95 2x laboratory plugs to ext Shunt Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer Values including errors of PSU600 and PSU600 BUR15 Frequency in kHz Amplitude error of measuring value of measuring range DC to 0 1 0 035 0 005 0 1 to 2 5 0 035 0 005 2 5 to 10 0 06 0 025 10 to 30 0 6 to 0 2 30 to 100 Use this table and LMG specifications to calculate the accuracy of the complete system 2 19 7 Connection of the sensor with LMG450 PSU600 K L45 Use PSU600 K LA5 and SSU4 to PSU DSUBOf 2 5m to LMG HDSUB15m to SSU 0 8m DSUBOF AY Figure 54 PSU600 K L45 to connect the PSU600 to the LMG450 and the SSU4 This cable PSU600 K L45 is used to connect a precision current sensor PSU600 to a power meter LMG450 and to supply it by a sensor supply unit SSU4 In the connector to the LMG450 the adjustment data of the PSU600 head are available as well as it s serial number For this reason this connector is delivered already mounted to the PSU600 head and the screws are sealed when you have ordered the package PSU600 L4S This should prevent that the wrong PSU600 head is connected to the cable ZES ZIMMER 79 218 Sensors and Accessories for precision power meters Current sensors The connection is quiet simple e Switch all power off and plug the connector
94. f the sensor with LMG500 Use direct current inputs I and I ZES ZIMMER 47 218 Sensors and Accessories for precision power meters Current sensors 2 14 Precision current transformer 10kA LMG Z582 Z590 370 14 5 82 370 M6 9mm deep Ma e in mm Dimensions in mm Figure 31 Dimensions of LMG Z582 Z590 200mm Figure 32 LMG Z582 Z590 suitable bus bars ZES ZIMMER 48 218 Sensors and Accessories for precision power meters Current sensors P1 K S1 k P2 L S2 l Figure 33 LMG Z582 Z590 connection diagram 2 14 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test If no burden is connected secondary terminals have to be short circuited Please refer to chapter 1 1 Safety precautions 2 14 2 Specifications Measuring range Secondary current Transformation ratio Maximum input overload Rated short time thermal current for 1s Bandwidth Nominal burden Protection class Degree of pollution Temperature range Bus bar Output connection 2 14 3 Accuracy 10kAeff continuous 2Aeff 5000 1 4x 200mm x 10mm primary fixing device M5 slotted headless screw max 2 5Nm screw terminals M5 Philips recessed head screw max 4mm 2 flexible 6mm 2 solid tightening torque 3 5Nm Accuracies based on sinusoidal
95. following ranges HALLSO HALL100 ZES ZIMMER 110 218 Sensors and Accessories for precision power meters Current sensors HALL200 2 24 7 Connection of the sensor with LMG500 Use L50 Z14 you get the following ranges HALLSO HALL100 HALL200 ZES ZIMMER 111 218 Sensors and Accessories for precision power meters Current sensors 2 25 Hall current sensors 300 500 1k 2kA L45 Z29 HALLxx T DSUB9F to supply unit T 2m ge HDSUBISM Im H to LMG 15 6 Figure 74 Dimensions of the L45 Z29 HALL300 DSUB9F to supply unit HDSUB15M wH to LMG DSUB9F i to supply unit HDSUB15M A to LMG 1m Figure 76 Dimensions of the L45 Z29 HALL1000 ZES ZIMMER 112 218 Sensors and Accessories for precision power meters Current sensors DSUBSF to supply unit HDSUB15M to LMG Figure 77 Dimensions of the L45 Z29 HALL2000 2 25 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Do not overload any current sensor with more than the measurable TRMS value Please refer to chapter 1 1 Safety precautions 2 25 2 Specifications and accuracies
96. he following ranges 2 2 8 Connection of the sensor with LMG500 Use L50 Z14 you get the following ranges ZES ZIMMER 21 218 Sensors and Accessories for precision power meters Current sensors 2 3 AC current clamp 100A 0 1A LMG Z327 a 22 Figure 4 Dimensions of the LMG Z327 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Please refer to chapter 1 1 Safety precautions 2 3 2 Specifications bare conductor phase ground 30Veff insulated conductor see cable spec 2 3 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp signal frequency 50 60 Hz Use LMG Z327 and LMG specifications to calculate the accuracy of the complete system ZES ZIMMER 22 218 Sensors and Accessories for precision power meters Current sensors 2 3 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 3 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 3 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 3 7
97. head is connected to the cable The connection is quiet simple ZES ZIMMER 61 218 Sensors and Accessories for precision power meters Current sensors Switch all power off plug the connector labeled LMG500 to the adapter L50 Z14 mounted on the LMG500 current channel Now you can switch on the power and make the measurements The rangenames of LMG500 the sensor name and calibration data are read out of the sensor EEPROM automaticaly Measuring ranges sensor input limited by PSU200 to max 200Apk Accuracy Use PSU200 and LMG500 specifications to calculate the accuracy of the complete system Add 30mA to the primary current DC offset tolerance 2 16 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is out of responsibility of ZES ZIMMER ZES ZIMMER 62 218 Sensors and Accessories for precision power meters Current sensors 2 17 Precision current transducer 200A PSU200HF Figure 42 PSU200HF
98. hms resistor to the corresponding channel of the 15 pin connector for the instrument When the current returns from the instrument it is fed into ground 3 The SSU4 with modification can not be used with PSU600 6 2 7 Modification option of SSU4 available for the use of PSU1000HF together with LMG450 and LMG500 The following changes concerning this documentation are done 1 DSUB9 connectors for the sensors 15V max 1000mA en Current output signal of the sensor max 1000mA 9 15V max 1000mA ZES ZIMMER 165 218 Sensors and Accessories for precision power meters Accessories 6 3 Artificial mid point for multi phase power meters LMG AMP Figure 110 Artificial mid point LMG AMP 6 3 1 A Safety warning Please refer to chapter 1 1 Safety precautions 6 3 2 General When measuring at three phase systems without accessible star point typical for frequency inverters an artificial star point is needed for measurements in star connections If necessary the losses of the artificial star point have to be considered They can be determined exactly The formula editor can be used to automatically calculate these losses and correct them 6 3 3 Connection to the LMG The LMG AMP is connected to the LMG using the six added cables Connect each channel U with U and U with U At the U jack at LMG AMP or at LMG you can connect your voltage This is usually accessable at the I or I jacks The three grey
99. ient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp signal frequency 50 60 Hz Use LMG Z329 and LMG specifications to calculate the accuracy of the complete system 2 9 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 9 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 9 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 9 7 Connection of the sensor with LMG450 Use direct current inputs I and I Alternative use L45 Z16 17 because of improved dynamic range with more ranges and better bandwidth 2 9 8 Connection of the sensor with LMG500 Use direct current inputs I and I Alternative use L45 Z16 17 because of improved dynamic range with more ranges and better bandwidth ZES ZIMMER 35 218 Sensors and Accessories for precision power meters Current sensors 2 10 Error compensated AC current clamp 3000A L45 Z16 Z17 L to LMG m E Figure 18 Dimensions of the L45 Z16 Z17 2 1
100. ilter Demod C g S Cpl Highpass a Lowpass Signal Processing Figure 122 L50 Z19 Select a filter with a lowpass frequency bigger than every possible fundamental frequency and lower than every possible switching frequency under all conditions of starting breaking and acceleration of the motor 6 11 2 Specifications min current for stable about 100uA synchronisation NO ISOLATION see safety warning connection length about 50cm but can be extended with usual savety laboratory leads 6 11 3 Connection of the sensor with LMG90 310 95 450 not possible ZES ZIMMER 182 218 Sensors and Accessories for precision power meters Accessories 6 12 Ethernet Adapter L95 Z318 L45 Z318 L50 Z318 LMG Z318 Pow Figure 123 L95 Z318 L45 Z318 L50 Z318 supply via LMG 300mm 24mm Figure 124 L95 Z318 L45 Z318 L50 Z318 supply via LMG Figure 125 LMG Z318 external supply via wall wart This LAN adapter Z318 is useful for the communication with a power meter LMG located anywhere in a local area network LAN via a virtual COM port simulation The communication is transmitted by the driver over LAN to the LMG for user purposes in the same way as e g the direct connection of PC COM1 to LMG COMa The power meter LMG will be accessible via this virtual COM port Perfect suitable for LMG Control software 6 12 1 A Safety warning Please refer to chapter 1 1 S
101. imary signal meter Figure 146 Grounding of common current sensor signals e In applications with a high dU dt and sensors with onboard electronics it might be profitable to shield the isolated primary conductor e g with copper foil connected only at one side to earth This shield ought to bleed of the capacitive coupled distortion to earth and keep them away from the sensor electronics This policy can also be used to enhance accuracy and reject distortion with other current transducers isolated Figure 147 Shielding of sensors with onboard electronics e In all cases you should adapt the bandwidth of the power meter to the bandwidth of the current sensor and the signal It is useless to measure the active power with a 5kHz bandwidth current clamp and a power meter bandwidth of 1OMHz in this case a signal filter of e g 1OkHz will not affect the measuring signal significantly but will highly reduce HF distortion and noise ZES ZIMMER 216 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 8 Range extension by changing primary ratio at current sensors current load ULTRASTAR 887 200 m r O NETSA Figure 148 external range extension You can use two windings through a current transducer to expand its current range dynamic In this example one winding with one turn for big currents and one winding with ten turns for small currents are taken If
102. ing of the scaling ratio see table Accuracies based on sinusoidal current frequency 45 65 Hz ambient temperature 23 3 C calibration interval year The values are in of measuring value Use LMG SHxx and LMG specifications to calculate the accuracy of the complete system nominal 10 50 100 200 500 1000 resistance por ea u ohms oe ohms ohms ohms ohms ohms fg ratio 1 00001 0 50001 0 20001 0 10001 0 05001 0 02001 0 01001 0 00501 0 00201 0 00101 faccuracy 0 15 maximum trms 1000 710 EN ca 1 ae ae sy 1 a current mA mA bandwidth DC to 100kHz ZES ZIMMER 132 218 Sensors and Accessories for precision power meters Current sensors C degree of 2 pollution temperature 0 C to 40 C range weight 100g output Security BNC cable and adapter connection 2 30 4 Connection of the sensor with LMG90 310 The use with LMG90 is not possible With LMG310 use Isensor external Shunt input 2 30 5 Connection of the sensor with LMG95 Use external Shunt input you get the following ranges all in A lohm regard maximum trms input current 2ohms regard maximum trms input current Sohms regard maximum trms input current 10ohms CC eaz omn value 6n iom orm sam 100m aoo e ZES ZIMMER 133 218 Sensors and Accessories for precision power meters Current sensors regard maximum trms input current 20ohms mx peak value
103. ing ranges and to calculate the accuracy of the complete system 2 16 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the PSU sensors from the current path you can do alternatively e Leave the PSU at the current path and disconnect the cable at the PSU side Disconnect the DSUB9 plug from the PSU and interconnect all of the 9 pins with the shield at the PSU plug or e Leave the PSU and the connection cable at the current path and disconnect the cable at the LMG supply unit side 1 Systems with supply via LMG Disconnect the HDSUB15 plug from the LMG and connect all of the 15 pins and the shield at the cable plug together 2 Systems with supply via supply unit SSU4 Disconnect the HDSUB15 plug from the LMG and disconnect the DSUB9 plug from the supply unit SSU4 Connect all of the 15 pins and the shield at the LMG cable plug together and connect all of the 9 pins and the shield at the SSU4 cable plug together To do this the load current has to be switched off 2 16 5 Connection of the sensor with LMG90 310 or other instruments with current input Use sensor suppy unit SSU4 with modification for PSU60 200 400 700 and PSU K3 K5 K10 and SSU4 K L31 and
104. ink frequency inverter output very high precision PSU200 DC 100kHz 0 02 200A feed x x x applications with DC current through frequency inverter DC link frequency inverter output very high precision PSU200HF DC 1MHz 0 02 200A feed x x applications with DC current through frequency inverter DC link frequency inverter output very high precision extended bandwidth e g for avionics automotive PSU400 DC 100kHz 0 02 400A feed x x x applications with DC current through frequency inverter DC link frequency inverter output very high precision PSU600 DC 100kHz 0 02 600A feed x x x applications with DC current through frequency inverter DC link frequency inverter output very high precision PSU700 DC 100kHz 0 02 700A feed x x x applications with DC current through frequency inverter DC link frequency inverter output very high precision ZES ZIMMER 10 218 Sensors and Accessories for precision power meters Introduction Sensor name lower upper basic current primary L L L typical applications corner corner accu range connec 95 45 50 freq freq racy tion PSU1000HF DC S500kHz 0 02 1000A feed x x x applications with DC current through frequency inverter DC link frequency inverter output very high precision extended bandwidth e g for avionics automotive PSU2000 DC 100kHz 0 02 select feed x x x application
105. ions and environmental requirements as indicated in this dokumentation when operating the product e Do not exceed the maximum specified voltage or current or use outside its measurement category e Always check the condition of the case and leads before use Never operate the unit if it has a damaged cord or plug if it is not working properly or if it has been dropped or damaged or dropped into water e Avoid severe impacts or rough handling that could damage the instrument Do not place any heavy object on the instrument e Keep the instruments away from water and other liquids e Use electrostatic discharge precautions while handling and making connections to the instrument e Do not block or obstruct the ventilation openings e Use suitable connection cables Different current sensors have unique connection cables for each different precision power meter LMG For example the connection cable between PSU200 and LMG500 PSU200 K L50 is neither suitable for PSU600 nor for LMG450 e To avoid the risk of electrical shock do not disassemble or attempt to repair the unit Incorrect repair can cause risk of electrical shock or injury to persons when unit is used ZES ZIMMER 6 218 Sensors and Accessories for precision power meters Introduction For all repairs please return the devices to your distributor or to ZES ZIMMER Electronic Systems e Do not touch energized circuits 1 1 1 Terms and symbols These terms and
106. l U12 f i31 12 H2 3 U10 U20 U30 yoy I isade z d wey Pa ee ao a _3 connection to power meter E HSTx 3 with Star delfa conversion Ud I gt star or delta aa MGX out1 UTA UZ U3 f Om U12 scale i Pa l out2 Ustiscale Ugobe ane U23 scale l l out3 t anc i ie E E TONS eee gt CH1 CH2 CH3 connection to power meter alternatively without star dlelta conversion sss sLMGx UT UZ U3 patigo POOO enc U10 scale U1 ULA UBA pu fo NS yU20 scale l out3 axe U30 scale iH Figure 138 HST wiring of 3 phase systems On the highvoltage side HST input1 input2 and input3 connects to L1 L2 and L3 All voltage measurements have the same reference potential earth Note that also isolated power systems have an important capacitance against earth therefore measurement of the isolated line voltages against earth with the HST works properly Isolated mains mains with connection to earth neutral isolated frequency inverters as well as frequency inverters with connection to earth neutral are measurable this way On the low voltage side the connection to the power meter LMG or other instruments can be done in two different ways 1 Instruments with internal star delta conversion are connected like shown in the upper part of the drawing Advantage is that unbalanced sources are measured correctly the total power is determined correctly as w
107. l currents And it can be used as well to build the difference of two e g lamp currents If not needed the second primary winding can be left open The guard terminal may be grounded to bypass capacitiv currents from input to output This reduce errors introduced by common mode voltage 2 28 2 Specifications BA Gum oF 142 ZES ZIMMER 122 218 Sensors and Accessories for precision power meters Current sensors 2 28 3 Accuracy Accuracies based on ambient temperature 23 3 C calibration interval 1 year at 5kHz to 500kHz of measuring value Phase difference ea aes ee ere Use L95 Z06 and LMG EEE to calculate the accuracy of the complete system 2 28 4 Wiring schematics 2 28 4 1 Lower currents high frequency source Figure 85 Low current application For applications with lower currents use both inputs in series and set the LMG Iscale to 3 ZES ZIMMER 123 218 Sensors and Accessories for precision power meters Current sensors 2 28 4 2 Higher currents max 18A high frequency source Figure 86 High current application For applications with higher currents use both inputs parallel and set the LMG Iscale to 6 2 28 4 3 Arithmetic mean value max 9A high frequency source Figure 87 Arithmetic mean value application To determine the arithmetic mean value of two currents Imean 114 12 2 set the LMG Isca
108. le to 3 In high frequency lightning applications where a earth current worth mentioning is present the light density is proportional to the arithmetic mean value of the two currents I1 and I2 ZES ZIMMER 124 218 Sensors and Accessories for precision power meters Current sensors 2 28 4 4 Difference of two currents starter electronic electronic ballast Figure 88 Difference of two currents To determine the difference of two currents Ilamp Isum lIstarter set the LMG Iscale to 6 The lamp current lamp is the difference of Isum and the current through the starter electronic during the operation 2 28 4 5 Improving the accuracy due to common mode effects In high frequency applications with current measurement on high common mode voltage potential it is advantageous to connect the low output of this current transformer with earth There is a double galvanic separation in the LMG and inside the current transformer itself So the secondary side has neither galvanic contact with the load current nor with earth the current channel is floating on an undefined potential The HF accuracy can be improved by draging down the floating voltage to about earth potential 2 28 5 Connection of the sensor with LMG90 310 or other instruments with current input The use with LMG90 is not possible With LMG310 use Isensor external Shunt input 2 28 6 Connection of the sensor with LMG95 Use Isensor external Shunt input
109. ltage 1 2 50us 9 9kV rated isolation voltage rms reinforced isolation 600V rated isolation voltage rms single isolation 1000V with EN50178 standards and following conditions over voltage category III pollution degree 2 creepage distance 11mm clearance distance 11mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact 2 15 3 Accuracy Accuracies based on sinusoidal current frequency DC to 100Hz ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer ZES ZIMMER 52 218 Sensors and Accessories for precision power meters Current sensors Amplitude error Phase error of meas value of measuring range PSU PSU60 0 015 0 005 See specification of the LMG connection cable for the LMG measuring ranges and to calculate the accuracy of the complete system 2 15 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the PSU sensors from the current path you can do alternatively e Leave the PSU at the current path and disconnect the cable at the PSU side Disconnect the DSUB9 plug from the PSU and interconnect all of the
110. ment you can measure the voltage between neutral and earth U4 against Us as well as the current in the neutral I4 to I4 ZES ZIMMER 169 218 Sensors and Accessories for precision power meters Accessories Important If you dont want to measure the current in a wire the jacks Ix and Ix have to be short circuit to enable the current to flow The load is connected to the CEE jack The load is measured with correct currents If measuring a generator the voltage is correct An important point is the safety The MAK3 is in compliance with IEC61010 1 and was constructed for voltages up to 300 520V CAT M ZES ZIMMER 170 218 Sensors and Accessories for precision power meters Accessories 6 7 Safety Grip for current and voltage connection LMG Z301 302 305 Figure 114 Safety claw grip type C 16A 1000V LMG Z301 Figure 115 Safety clamp grip type A 1A 1000V LMG Z302 Figure 116 Safety claw grip type D 16A 500V power fuse 100kA switch capability LMG Z305 ZES ZIMMER 171 218 Sensors and Accessories for precision power meters Accessories 6 8 DSUB25 Adapter for LMG process signal interfaces L5 IOBOX S F Figure 117 Adapter from DSUB25 to screw cage connection L5 IOBOX S Figure 118 Adapter from DSUB25 to spring cage connection L5 IOBOX F 6 8 1 Included in delivery e 2m connection cable DSUB25f to DSUB25m to connect this adapter to LMG process signal interface ZES Z
111. n of measuring value of measuring range current clamp and in phase error in degree Influence of coupling mode This current clamp can transfer only AC currents The compensation circuit may cause a DC signal wich is interpreted by the instrument as a DC current This could cause additional errors Therefore this clamp should only be used with the LMG setting AC coupling The accuracies are only valid for this case Frequency 5Hzto 10Hzto 45Hzto 65Hzto 1kHz to 5kHz to 20kHz to 10Hz 45Hz 65Hz 1kHz 5kHz 20kHz 50kHz pose e 3 os os 2 6 _ Use LMG Z406 Z407 and LMG specifications to calculate the accuracy of the complete system 2 1 4 Ordering guide The current clamp LMG Z406 is available in a package with 4 clamps it is called LMG Z407 The standard connection length is 3m Optionally can be ordered a custom defined length between 1m 10m 2 1 5 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG ZES ZIMMER 18 218 Sensors and Accessories for precision power meters Current sensors 2 1 6 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 1 7 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt input Set L
112. n connect the clamp to the device under test Synchronisation adapter without safety isolation Only for current clamps with galvanic isolation NO DIRECT CONNECTION TO ANY EXTERNAL VOLTAGES Please refer to chapter 1 1 Safety precautions L50 Z19 is an accessory for the precision power meter LMG500 It can be used with any xxA 1A current clamp e g LMG Z325 LMG Z326 LMG Z322 or LMG Z329 A burden resistor a high sensitivity amplifier and a 8th order Butterworth lowpass filter are included in the DSUB15 plug to assure stable synchronisation to any disturbed signal It simplifies the synchronisation to the fundamental current frequency of a frequency inverter output It needs about 100uA fundamental current at the signal input That means with a 1000A 1A current clamp it is possible to detect the fundamental in a wide current range from 100mA to 1000A If the fundamental current is lower than 100mA several load current windings in the clamp can be used to enlarge the sensitivity or use an other clamp with 100A 1A ratio LMG500 settings in the measure menue set Sync to ExClmp and adjust the lowpass corner frequency Important L50 Z19 can be configured only in Group A if it is configured in Group A it can be used in Group B as well via Sync ext ZES ZIMMER 181 218 Sensors and Accessories for precision power meters Accessories Com NM NM ut U I o Line Ext Measuring Signal UI Sync Sync F
113. n itself Sometimes the application can be operated in a working point with a current low enough to be measured direct as well as via current sensor The big advantage of the phase adjust in the application itself is that its made with the identical frequency or frequency mix as later in the measurement environment and the phase error of a current transducer is usually dependent from the signal frequency Current transducer og HNDCLONONO Hoag li og Og a WO Mn S Ea a 0 a snl Figure 143 wiring for current transducer phase correction Use a few windings through the current transducer and measure the same current with a different power channel and direct current input Connect the voltage to both power channels in parallel Don t forget to set the current scaling factor to compare the active power ZES ZIMMER 211 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base Best sensitivity can be achieved with a signal phaseshift near 90 degree Now switch the LMG500 to the menue range delay and set the current channel delay for the same power factor display like the direct measured signal For the proper phase adjustment bring the power channel 2 with external current sensor to the same power factor as the power channel 1 with direct current measurement It is important to adjust to the same power fa
114. nect the red wire with I and the black wire with I of the power meter e See that the transducer head is connected to earth e Make sure the voltage selector on the IEC inlet is set to the local voltage and connect the power cord e Switch on the system The SAT will now measure the current running through the transducer head On the front plate the status of the unit can be monitored using the 7 LEDs ZES ZIMMER 101 218 Sensors and Accessories for precision power meters Current sensors Cabinet front Cabinet rear Analog out cables Programming plug Overload Power Status IpLow 600A 2000A 5000A Transducer head cable IP Primary cable Busbar Status signals Le Sync out signal to other units Sync source from another unit i IOO 100 115 230V 50 60Hz i i i i i Figure 71 SAT installation 2 23 4 LEDs on the front On the front of the electronics and supply rack there are 7 LEDs for indication of system status warning and error POWER This LED is lit blue when the electronics and supply rack is on STATUS This LED is lit green when the status of the unit is OK Ip LOW This LED is lit yellow when the current passing through the transducer head is below 0 5 of the programmed maximum current 600A not used 2000A This LED is lit yellow when a SAT2000 transd
115. o the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 4 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 4 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 4 7 Connection of the sensor with LMG450 Use direct current inputs I and I 2 4 8 Connection of the sensor with LMG500 Use direct current inputs I and I ZES ZIMMER 25 218 Sensors and Accessories for precision power meters Current sensors 2 5 AC current clamp 200A 1A LMG Z325 O Figure 7 LMG Z325 HT Men Figure 8 Dimensions of the LMG Z325 2 5 1 A Safety warning No safety isolation measurements only at insulated conductors allowed Always connect the sensor first to the meter and afterwards to the device under test Please refer to chapter 1 1 Safety precautions 2 5 2 Specifications 200A 200 1 300A 400A for 3min 40Hz to 5kHz ZES ZIMMER 26 218 Sensors and Accessories for precision power meters Current sensors Isolation bare conductor phase ground 30Veff insulated conductor see cable spec safety sockets for 4mm plugs 2 5 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C conductor in the middle of the clamp signal frequency 50
116. o the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 2 7 2 Specifications Weien ZES ZIMMER 30 218 Sensors and Accessories for precision power meters Current sensors 2 7 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the clamp The values are in of measuring value of measuring range current clamp and in phase error in degree Frequency 2Hz to 10Hz to 45Hz to 65Hz to 1kHz to 5kHz to 10kHz to 20kHz to 10Hz 45Hz 65Hz 1kHz 5kHz 10kHz 20kHz 40kHz Use L45 Z10 and LMG specifications to calculate the accuracy of the complete system Influence of coupling mode This current clamp can transfer only AC currents The compensation circuit may cause a DC signal wich is interpreted by the instrument as a DC current This could cause additional errors Therefore this clamp should only be used with the LMG setting AC coupling The accuracies are only valid for this case 2 7 4 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 7 5 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07
117. oe waasi J ce 7 L i HJ Source r gas Load sK Figure 51 Connection of one PSU600 to the LMG95 Accuracy Use PSU600 and LMG95 specifications to calculate the accuracy of the complete system Measuring ranges limited by PSU600 to max 600Apk ZES ZIMMER 77 218 Sensors and Accessories for precision power meters Current sensors 2 19 6 2 Precision burden for PSU600 and LMG95 PSU600 BUR15 DSUBSF lt to PSU600 i DSUB9M to LMG95 Supply black Ext Shunt greyll Figure 52 PSU 600 BUR15 to connect the PSU600 to the shunt input of the LMG95 directly a Mee LMG95 i Status IEEE488 HAC Start 0 Write Print Power Supply 90 260VAC 45 65Hz 50W Freeze L Precision Power Met Kf j Au oe Ca a uxillial r SN I ransducer Su L x O DLO N E T an rane SST 5 g A BS EN jh iN xe 2 5m Sy SE PSU600 BUR15 Figure 53 Connection of PSU600 and BUR15 to the LMG95 Specifications Range High Selected with internal slide switch of the PSU600 BUR15 Necessary scale setting at the LMG95 100 1000 ZES ZIMMER 78 218 Sensors and Accessories for precision power meters Current sensors Bandwidth DC to 100kHz Output connection 2x SUBD to PSU and Aux supply socket o
118. om 1A to 100A Accuracy and bandwidth specification is for small signal as well as for wide signal level Frequency range 30Hz to 100Hz to 100kHz to 300kHz to 100Hz 100kHz 300kHz 1MHz Current of measuring value 0 25 0 25 Use LMG Z601 and LMG specifications to calculate the accuracy of the complete system ZES ZIMMER 143 218 Sensors and Accessories for precision power meters Current sensors 2 32 4 Improving the accuracy due to common mode effects In high frequency applications with current measurement on high common mode voltage potential it might be advantageous to connect the yellow plug with earth There is a double galvanic separation inside the LMG and inside the current transformer itself and a capacitive coupling from the isolated primary lead to the current transformer So the secondary side has neither galvanic contact with the load current nor with earth the current channel is floating on an undefined potential The HF accuracy can be improved by draging down the floating voltage to about earth potential but this might also cause resonance so beware not to distort the measurement accuracy 2 32 5 Sensor without LMG The secondary side of this current transformer has to be connected under all circumstances If the LMG has to be removed and the sensor can not be disconnected be sure to short circuit the current output I with I of the sensor to avoid dangerous voltages This open loop voltages w
119. on cables and adapter 3 1 3 Accuracy If you order the accessory L95 Z07 together with the suitable current sensor then you can find a label with the scaling factor on L95 Z07 Please set this current scaling in the range menue of the LMG95 For the use of different current sensors e g alternating with LMG450 not ordered at the same time with L95 Z07 you have to calibrate the sensor together with the LMG95 to find the correct scaling Use the sensor and LMG specifications to calculate the accuracy of the complete system ZES ZIMMER 150 218 Sensors and Accessories for precision power meters LMG95 connection cables and adapter 3 2 Connect PSU60 200 400 700 to LMG95 PSU60 200 400 700 K L95 _ DSUBIM to LMG95 grey to LMG9SII violet to LMGSS Ix Figure 100 PSU60 200 400 700 K L95 for direct connection of the PSU60 200 400 700 to the current input of the LMG95 rors tbat LMG95 aa IEEE488 s CO Stop Wrie Print Power Supply 90 260VAC 45 65Hz 50W Freeze i Shunt Transformer Input 1 r Auxiliary Transducer Supply max 10V 66 SS ae All Inputs 600V again Precision Power Met g A Source Load N j N amp Q Figure 101 Connection of PSU60 200 400 700 to the LMG95 3 2 1 A Safety warning Always c
120. on power meters FAQ frequently asked questions Knowledge base 8 3 Example of an error calculation LMG500 with external shunt Particularly with regard to the standby power measurements compliant to EN62301 and ENERGY STAR it might be profitable and necessary to use an external shunt to increase the current dynamic and accuracy at low currents This example shows how to calculate the measuring tolerance of the complete system consisting of LMG500 and the external shunt LMG SH100 e External shunt LMG SH100 100ohms 0 15 e Voltage measurement Ueff 230V LMGS500 Urange 250V 400Vpk range spec see documentation of LMG500 in 115V supply networks Urange 130V 200Vpk the remaining calculation is the same e Current measurement leff 4mA LMGS500 Irange 5mA 15 63mApk range spec see documentation of LMG SHxx LMGS500 I measuring accuracy 0 01 of measuring value 0 02 of measuring range e Power measurement PF 0 1 f 50Hz or 60Hz S 0 92VA P 92mW LMG5S500 Prange Urange Irange 400V 15 63mA 6 252W LMG500 P measuring accuracy 0 015 of measuring value 0 01 of measuring range e Tolerance of current and power measurement Because the shunt tolerance is a purely scaling error without a term of measuring range the error analysis can be simplified to the following calculation shunt error term LMG error of meas value___ LMG error of meas range AI 0 15 100 4mA 0 01 100 4mA 0 02 100 15 63mA 6uA 0 4uA 3
121. onnect the sensor first to the meter and afterwards to the device under test Connecting cables without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 3 2 2 Installation No additional supply needed Cable length between PSU and LMG 2 5m ZES ZIMMER 151 218 Sensors and Accessories for precision power meters LMG95 connection cables and adapter 3 2 3 LMG95 ranges direct current input with PSU200 Iscale 1000 limited by PSU200 to max 200Apk 3 2 4 LMG95 ranges direct current input with PSU400 Iscale 2000 limited by PSU400 to max 400Apk 3 2 5 LMG95 ranges direct current input with PSU700 Iscale 1750 820 75A 1641 5A limited by PSU700 to max 700Apk 3 2 6 Accuracy Use PSU and LMG95 specifications to calculate the accuracy of the complete system 3 2 7 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the sensors from the current path disconnect the DSUB9 plug and the savety laboratory plugs from the LMG and connect all of the 9pins together with ground shield of the plug and together with the hot wired savety laboratory plugs To do this the load current has to
122. ould be hazardous for the user and might damage the sensor 2 32 6 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 32 7 Connection of the sensor with LMG95 Use direct current inputs I and I 2 32 8 Connection of the sensor with LMG450 Use direct current inputs I and I 2 32 9 Connection of the sensor with LMG500 Use HF current inputs Ihf and I You get the following measuring ranges nominal value 15A 30A 60A 120A max trms value 22 5A 45A 90A 180A ZES ZIMMER 144 218 Sensors and Accessories for precision power meters Current sensors 2 33 Precision wideband current transformer WCT1000 LMG Z602 no picture yet Figure 98 LMG Z602 2 33 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test An open connection on the secondary side will cause hazardous voltage and might destroy the transformer Please refer to chapter 1 1 Safety precautions LMG Z602 is an accessory for the precision power meters LMG with a high bandwidth The high frequency design provides best accuracy at high frequencies It also simplifies the measurement of output power in high frequency applications with floating potential The current transformer has a 1A current output for the direct connection to the LMG current input LMG Z602 is optimized for the LMG500 and its Ihf input Because of the low and
123. out of responsibility of ZES ZIMMER ZES ZIMMER 92 218 Sensors and Accessories for precision power meters Current sensors 2 22 Precision current transducer 2000A PSU2000 L rH S a E SUB 25POLE ALE 200 technical current flow 165 z 70 ee MOUNTING HOLES ex 10 5 a Figure 64 Dimensions of the PSU2000 2 22 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Dont allow primary current without supply of the PSU Please refer to chapter 1 1 Safety precautions 2 22 2 Current direction marking Please regard the arrow technical current flow in the figure above Sometimes the physical current flow is marked on the transducer in doubt please compare with the technical drawing this arrow is valid 2 22 3 Specifications 1000Apk to 2000Apk user selectable in 125Apk steps Nominal secondary current 1Apk 1000 1 to 2000 1 depends on the selected nominal input current ZES ZIMMER 93 218 Sensors and Accessories for precision power meters Current sensors Measuring range PSU normal 1150Apk to 2300Apk depends on the selected operation nominal input current Overload capacity fault 500kA for 0 1s Bandwidth 3dB small signal 0 5 DC to 100kHz Inom Slew rate 10 90
124. particularly where these changes will improve the performance e Headquarter Germany ZES ZIMMER Electronic Systems GmbH Tabaksmiihlenweg 30 D 61440 Oberursel Taunus Germany phone 49 0 6171 628750 fax 49 0 6171 52086 email sales zes com internet http www zes com e Subsidiary USA ZES ZIMMER Inc 4808 Santa Monica Ave San Diego CA 92107 phone 1 760 550 9371 email usa zes com internet http www zes com ZES ZIMMER 2 218 Sensors and Accessories for precision power meters Content l introduction ecane Me tt aca alate liad arene elect 6 es Safety PrCCall ONS s5cs cvents catieacen nuieaeaetdsas actany nase E S 6 1 2 Selection table current sensors x cccpetiecacatsostyesedesiacadastaneeeysdacetoo heures 9 1 3 Selection table voltage SENnSOMS scu sccdcsausteci ese dacarucsSerpancters sence 12 1 4 Advantages and disadvantages of different current sensor types 13 LS SUpport TEQUICS Sates ae eae a inate ie ae ar titre E EAA 15 2 Current SENS ORG nsore tasty dees E E EE EE 17 2 1 Active error compensated AC current clamp 40A LMG Z406 Z407 17 2 2 Active error compensated AC current clamp 40A L45 Z06 Z07 20 2 3 AC current clamp 100A 0 1A LMG Z327 ossssssssssessssesesssressereessersseee 22 2 4 AC current clamp 200A 0 2A LMG Z326 0 eeecccceesseeceesteeeeeeeeeeeentees 24 2 5 AC current clamp 200A 1A LMG Z325 ccccsscccessteceeesteceessneeeeennees 26 2 6 AC curren
125. perating currents in an automated testbench ZES ZIMMER 218 218 Sensors and Accessories for precision power meters
126. pollution degree 2 creepage distance 11mm clearance distance 11mm comparative tracking index CTI 600V Attention when using Busbar without isolation regard DSUB cable isolation or avoid contact depending on adapter cable to LMGxx supply 15V 280mA 2 17 3 Accuracy Accuracies based on sinusoidal current frequency DC to 100Hz ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer ZES ZIMMER 64 218 Sensors and Accessories for precision power meters Current sensors Amplitude error Phase error of meas value of measuring range PSU PSU200 0 015 0 005 See specification of the LMG connection cable for the LMG measuring ranges and to calculate the accuracy of the complete system 2 17 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the PSU sensors from the current path you can do alternatively e Leave the PSU at the current path and disconnect the cable at the PSU side Disconnect the DSUB9 plug from the PSU and interconnect all of the 9 pins with the shield at the PSU plug or e Leave the PSU and the connection cable at the current path and disconnect the cable at the LMG s
127. r test Dont allow primary current without supply of the SAT unit ZES ZIMMER 100 218 Sensors and Accessories for precision power meters Current sensors This transducer must be used in electric electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer s operating instructions When operating the transducer certain parts of the module can carry hazardous voltage e g primary busbar power supply Ignoring this warning can lead to injury and or cause serious damage This transducer is a build in device whose conducting parts must be inaccessible after installation A protective housing or additional shield could be used Main supply must be able to be disconnected Please refer to chapter 1 1 Safety precautions 2 23 2 Grounding the transducer head For safety reasons all transducer heads must be connected to earth ground Connect the earth wire to the transducer head using a M10 ring terminal fastened to one of the 4 mounting holes on the brackets 2 23 3 Quick start power up the system To quickly get your SAT system up and running follow the instructions e Connect the transducer head to the electronics and supply unit using the supplied transducer head cable and mount the programming plug head not necessary with SAT2000hf in the connector on the head e Connect the precision power meter LMG to the SAT analogue current output using the supplied cable Con
128. ready calculated AU 0 AI Al clamp Ox ane 2 6635 iad 360 Ag 2 For the angles you have to use the radient 45 Trad AP yyy 100A cos lt 0 0V te 230V cos E 1 5A 230V 100A sin 0 035 0 0W 243 95W 569 22W 813 17W At this point the error values caused by the clamp should be marked The amplitude error of the clamp 243 95W and the phase shift causes 569 22W what means 813 17W error are caused by the clamp ZES ZIMMER 206 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base The total error of the active power is AP total AP css AP clamp 0 03996kW 0 81317kW 0 85313kKW The relative error of the active power is Hus 0 0525 2 5 25 relative 8 2 1 Improving the accuracy If you use a current clamp like in this example with a nominal current of 1000A and your current is only 10 what means 100A a simple trick to increase the accuracy is to wind the conductor several times through the clamp In the example the accuracy of the clamp changes with three windings to 0 75 because of the primary current of 300A the phase shift is 0 75 The next example of calculation is done for three windigs Utms 230 000V range 250V gt range peak value 400V iii Scaling 333 333 what means all current values are divided by 3 even the errors The ratio of the clamp stays at 1000 1 Valu
129. requency inverter output Hall2000 through frequency inverter DC link low cost ZES ZIMMER 11 218 Sensors and Accessories for precision power meters Introduction Sensor name lower upper basic current primary L L L typical applications corner corner accu range connec 95 45 50 freq freq racy tion L50 Z29 DC 100kHz 0 4 300A feed x frequency inverter output Hall300 through frequency inverter DC link low cost L50 Z29 DC 100kHz 0 8 500A feed x frequency inverter output Hall500 through frequency inverter DC link low cost L50 Z29 DC 150kHz 0 4 1000A feed x frequency inverter output Hall1000 through frequency inverter DC link low cost L50 Z29 DC 100kHz 0 3 2000A feed x frequency inverter output Hall2000 through frequency inverter DC link low cost High frequency sensors L95 Z06 5kHz 500kHz 0 5 15A terminal x x summing current transducer L95 Z06HV lighting applications ultrasonic LMG Z601 30Hz 1MHz 0 25 100A feed x x x very high frequency through applications avionics ultrasonic External shunt low current LMG DC 100kHz 0 15 select terminal x no x very low current SHxx uA 1A LMG DC 10kHz 0 15 select terminal x no x 50Hz standby current SHxx P 0 3 uA 0 5A overload protection 20A for 1 minute 1 3 Selection table voltage sensors Sensor name lower upper basic voltage primary L L L
130. ring indicator 6 13 4 Included in delivery e USB RS232 Adapter e DSUB9m to DSUB9f connection cable pin assignment 1 1 about 1 8m ZES ZIMMER 190 218 Sensors and Accessories for precision power meters Accessories 6 14 IEEE488 bus cable LMG Z312 Z313 Z314 Figure 132 LMG Z312 Z313 Z314 IEEE 488 bus cable full screened metal plug socket case to maintain the excellent noise immunity of all LMG instruments Cable length LMG Z312 Im LMG Z313 2m LMG Z314 4m 6 14 1 A Safety warning Please refer to chapter 1 1 Safety precautions ZES ZIMMER 191 218 Sensors and Accessories for precision power meters Accessories 6 15 RS232 interface cable LMG Z317 AFD Ss Figure 133 LMG Z317 RS232 interface cable DSUB 9 male to DSUB 9 female length about 1 8m 6 15 1 A Safety warning Please refer to chapter 1 1 Safety precautions ZES ZIMMER 192 218 Sensors and Accessories for precision power meters Accessories 6 16 Safety laboratory leads LMG Z307 308 Figure 134 LMG Z307 308 6 16 1 A Safety warning Please refer to chapter 1 1 Safety precautions 6 16 2 Specifications Protection class 1000V CAT M Temperature range 10 C to 80 C Length LMG Z307 0 25m LMG Z308 1 25m ZES ZIMMER 193 218 Sensors and Accessories for precision power meters Voltage sensors 7 Voltage sensors 7 1 Precision high voltage divider HST
131. rrors Use LMG Z502 05 10 20 and LMG specifications to calculate the accuracy of the complete system 2 11 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 11 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 11 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 11 7 Connection of the sensor with LMG450 Use direct current inputs I and I Or use L45 Z22 and sensor input for better dynamic range but small additional error term 2 11 8 Connection of the sensor with LMG500 Use direct current inputs I and I ZES ZIMMER 41 218 Sensors and Accessories for precision power meters Current sensors 2 12 Precision current transformer 4000A LMG Z542 Z545 Z550 102 aml 185 te MaBe in mm dimensions in mm 3 Ww oa m a i 110 5 Figure 23 Dimensions of LMG 2Z542 Z2545 Z550 A 3 100mm 83mm y 80mm
132. s Accessories 6 9 9 Pulse input A and B Permissible input voltage Ulowmin 30V at 1 4mA Ulowmax 0 8V at 0 001mA Uhighmin 2V at 0 002mA Uhighmax 30V at 1 2mA Input resistance 1Mohms at 0V lt Uin lt 5V 22kohms at 30V lt Uin lt 30V 6 9 10 Encoder supply Voltage 5V 10 Load max 100mA 6 9 11 Connection of the sensor with LMG90 310 95 not possible 6 9 12 Connection of the sensor with LMG450 Plug and use solution like current sensors Use current channel 6 9 13 Connection of the sensor with LMG500 not possible use L50 Z18 ZES ZIMMER 176 218 Sensors and Accessories for precision power meters Accessories 6 10 Adapter for incremental rotation speed encoders L50 Z18 Figure 120 L50 218 6 10 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 6 10 2 General This plugon adapter for LMG500 converts pulses of common industrial incremental encoders with two 90 degree phase shifted pulse outputs into analogue voltage This voltage can be analysed graphically with high temporal resolution by using sensor input of LMG500 Compared to this digital encoder input of process signal interface provides only one value each measuring cycle and with L50 Z18 you get a fast high dynamic response to changes in ro
133. s over voltage category II pollution degree 2 rms voltage AC isolation test 50 60Hz Imin 10 8kV impuls withstand voltage 1 2 50us 19 9kV rated isolation voltage rms reinforced isolation 1250V rated isolation voltage rms single isolation 2500V with EN50178 standards and following conditions over voltage category IIL pollution degree 2 creepage distance 25mm clearance distance 25mm comparative tracking index CTI 100V Attention when using Busbar without isolation regard output cable isolation or avoid contact weight transducer head approx 17kg supply rack approx 5kg 2 23 12 Connection of the sensors with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 23 13 Connection of the SAT2000 SAT2000hf sensor with LMG95 direct current input I and I 150mA 1 2A range 4 ranges with L95 O8 3 modification 40mA 1 2A range 6 ranges 2 23 14 Connection of the SAT2000 SAT2000hf sensor with LMG450 direct current input I and I 600mA 1 2A range 2 ranges ZES ZIMMER 107 218 Sensors and Accessories for precision power meters Current sensors 2 23 15 Connection of the SAT2000 SAT2000hf sensor with LMG500 direct current input I and I 20mA 1 2A range 7 ranges 2 23 16 Connection of the SAT5000 sensor with LMG95 direct current input I and I 150mA 2 5A range 5 ranges with L95 08 3 modification 40mA 2 5A range 7 ranges 2 23 17 Connection of the
134. s LMG MAK3 Figure 113 Adaptor for 16A 3phase devices LMG MAK3 6 6 1 A Safety warning Attention Ensure in any case that the N neutral on the patch panel is connected from the input side to the output side Either via a current measurement path or with a short circuit on the patch panel An open N neutral can lead to dangerous voltage at the output and may destroy the connected load If you dont want to measure the current in L1 L2 orL3 the jacks Ix and Ix have to be short circuit to enable the current to flow Please refer to chapter 1 1 Safety precautions 6 6 2 General The MAK3 is an adaptor for measuring at 3 phase systems up to 16A per phase It was developed for the instrument series LMG310 LMG450 and LMGS500 but you can also connect other instruments The supply is done by a about 2m long wire The schuko jack is to supply the instrument If you are measuring a load the power consumption of the instrument is not taken into account because it is supplied befor the measuring connectors If you are measuring a generator you should supply the instrument from another jack to avoid measuring errors With the MAK3 you can measure the voltage of the three phases jacks U1 U2 and U3 against the neutral connector U1 U2 and U3 But you can also measure the linked voltages The three currents are also accessable from l b and s to l Iz and Is Further on by using a 4 channel instru
135. s 157 GACCESSORIS Sy ised E A hea tetenea S 159 6 1 Shielded DSUB9 extension cable male female LMG Z DVxx 159 6 2 Sensor supply unit for up to 4 current sensors SSUA ee eeeeeeeeeee 160 6 3 Artificial mid point for multi phase power meters LMG AMP 166 6 4 Adaptor for measurement at Schuko devices LMG MAS 05 167 6 5 Adaptor for measurement at IEC connector devices LMG MAK1 168 6 6 Adaptor for measurement at 16A 3phase devices LMG MAK3 169 6 7 Safety Grip for current and voltage connection LMG Z301 302 305 171 6 8 DSUB25 Adapter for LMG process signal interfaces L5 IOBOX S F 172 6 9 Adapter for incremental rotation speed encoders L45 Z18 00 173 6 10 Adapter for incremental rotation speed encoders L50 Z18 177 6 11 Synchronisation adapter with adjustable lowpass filter L50 Z19 181 6 12 Ethernet Adapter L95 Z318 L45 Z318 L50 Z318 LMG Z318 183 6 13 USB RS232 Adapter LMG Z316 00 eeeesscesseseeceeeceeceeseeneeeseeenseenes 189 6 14 IEEE488 bus cable LMG Z312 Z313 Z314 occ eeceesseceteceneeeeeees 191 6 15 RS232 interface cable LMG Z317 ccccccceeeeseeesesesessseseseseeeeeeees 192 6 16 Safety laboratory leads LMG Z307 308 cceescceceesteceeseeeeeeeseeeeeeaes 193 T Voltage SCMSOMS menee E T EE EE EA Ei 195 7 1 Precision high voltage divider HST3 6 9 12 senssssssesssssseesserssesee 195 8 FAQ frequently a
136. s a voltage output for the direct connetion to the LMG external Shunt Transformer input The two galvanically separated primary windings are suitable to use in series to increase the sensitivity for small currents And it can be used as well to build the difference of two e g lamp currents If not needed the second primary winding should be used in parallel to the first primary winding ZES ZIMMER 127 218 Sensors and Accessories for precision power meters Current sensors 2 29 2 Specifications Maximum input 2 29 3 Accuracy Accuracies based on ambient temperature 23 3 C calibration interval 1 year at 5kHz to 500kHz of measuring value Phase difference e es es ee Use L95 Z06 and LMG EEE to calculate the accuracy of the complete system ZES ZIMMER 128 218 Sensors and Accessories for precision power meters Current sensors 2 29 4 Wiring schematics 2 29 4 1 Lower currents high frequency source Figure 90 Low current application For applications with lower currents use both inputs in series and set the LMG Iscale to 3 2 29 4 2 Higher currents max 18A high frequency source Figure 91 High current application ZES ZIMMER 129 218 Sensors and Accessories for precision power meters Current sensors For applications with higher currents use both inputs parallel and set the LMG Iscale to 6 2 29 4 3 Arithmetic mean value max
137. s based on sinusoidal current frequency DC to 100Hz ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the transducer Amplitude error Phase error of meas value of measuring range PSU PSU1000HF 0 015 0 005 See specification of the LMG connection cable for the LMG measuring ranges and to calculate the accuracy of the complete system ZES ZIMMER 89 218 Sensors and Accessories for precision power meters Current sensors 2 21 4 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit 2 21 5 Connection of the sensor with LMG90 310 or other instruments with current input Use SSU4 with modification for PSU1000HF and PSU K3 K5 K10 to connect PSU1000HF with SSU4 and SSU4 K L31 to connect current output of SSU4 with LMG90 310 I and I 2 21 6 Connection of the sensor with LMG95 Use SSU4 with modification for PSU1000HF and PSU K3 K5 K10 to connect PSU1000HF with SSU4 and SSU4 K L31 to connect current output of SSU4 with LMG95 I and I 2 21 7 Connection of the sensor with LMG450 Use PSU1000HF K and SSU4 with modifikation for PSU1000HF Figure 61 PSU1000HF K to connect the PSU1000HF to the LMG450 and the SSU4 This cable PSU1O00HF K is used to connect a precision current sen
138. s not possible 2 25 5 Connection of the sensor with LMG95 The use with LMG95 is not recommended better use L50 Z29 Hallxx and L95 Z07 Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 25 6 Connection of the sensor with LMG450 Use sensor input you get the following ranges HALL300 HALLS00 HALL1000 ZES ZIMMER 114 218 Sensors and Accessories for precision power meters Current sensors HALL2000 2 25 7 Connection of the sensor with LMG500 The use with LMG500 is not recommended please see L50 Z29 Hallxx ZES ZIMMER 115 218 Sensors and Accessories for precision power meters Current sensors 2 26 Hall current sensors 300 500 1k 2kA L50 Z29 HALLxx H A pee al Figure 78 Dimensions of the L50 Z29 Hall300 HDSUBIS to LMG300 ae Wa 755 ae a z EERI Figure 79 Dimensons of the L50 Z29 Hall500 13 4 y HDSUB15 2m J4 455 110 ii I 40 5 62 la 10 l a4 Figure 80 Dimensions of the L50 Z29 Hall1000 152
139. s with DC current 1000 through frequency inverter DC link 2000A frequency inverter output very high precision SAT2000 DC S50kHz 0 02 select feed x x x applications with DC current 125 through frequency inverter DC link 2000A frequency inverter output high precision SAT2000hf DC 300kHz 0 02 2000A feed x x x applications with DC current through frequency inverter DC link frequency inverter output high precision SAT5000 DC 50kHz 0 02 select feed x x x applications with DC current 2500 through frequency inverter DC link 5000A frequency inverter output high precision Current transducer Hall L45 Z28 DC 200kHz 0 9 50A feed x x x frequency inverter output Hall50 through frequency inverter DC link low cost L45 Z28 DC 200kHz 0 7 100A feed x x x frequency inverter output Hall100 through frequency inverter DC link low cost L45 Z28 DC 100kHz 0 65 200A feed x x x frequency inverter output Hall200 through frequency inverter DC link low cost L45 Z29 DC 100kHz 0 4 300A feed x x frequency inverter output Hall300 through frequency inverter DC link low cost L45 Z29 DC 100kHz 0 8 500A feed x x frequency inverter output Hall500 through frequency inverter DC link low cost L45 Z29 DC 150kHz 0 4 1000A feed x x frequency inverter output Hall1000 through frequency inverter DC link low cost L45 Z29 DC 100kHz 0 3 2000A feed x x f
140. sensors There is no potential separation in this adapter and in the LMG450 sensor input NOT FOR DIRECT CURRENT MEASUREMENT Please refer to chapter 1 1 Safety precautions 4 2 2 Specifications L45 Z22 is an accessory for the precision power meter LMG450 Its benefit is the usage of isolated custom current sensors with 1A output current e g current transducers or clamps with the LMG450 sensor input In comparison to the usage of the direct current inputs of the LMG450 the accessory L45 Z22 is optimized for the sensor output current of 1A and a dynamic range down to 31 25mA as full range Bandwidth DC to 20kHz Isolation NO ISOLATION NOT FOR DIRECT CURRENT MEASUREMENT Connection HD15 with EEPROM for LMG sensor input length about 80cm 4 2 3 Accuracy Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year The values are of measuring value of measuring range ZES ZIMMER 154 218 Sensors and Accessories for precision power meters LMG450 connection cables and adapter Frequency Hz DC to 45Hz 45Hz to 65Hz 45Hz to5kHz 5kHz to 20kHz 0 05 0 05 0 05 0 05 0 1 0 1 0 25 0 25 Use L45 Z22 and LMG specifications to calculate the accuracy of the complete system 4 2 4 Connection of the sensor with LMG90 310 not possible 4 2 5 Connection of the sensor with LMG95 not possible 4 2 6 Connection of the sensor with LMG450 4 2 7 Connection of the sensor with LMG
141. sked questions Knowledge base 203 Balk The B rden TESTS OMe eocen inerea se cpesnaupesteannnneseveneanoendecueansunnceuetoas oats 203 8 2 Example of an error calculation general derivation 0 0 0 0 eeeeeeeeeeeeee 205 8 3 Example of an error calculation LMG500 with external shunt 209 8 4 Example of an error calculation LMG500 with HST3 eee 210 8 5 Phase correction of current transducers with LMGSO00 eeeeeeeee 211 8 6 Multiple external sensors in a test bench with LMG450 LMGS500 213 8 7 Avoid distortion when using external sensors in noisy environment 215 8 8 Range extension by changing primary ratio at current sensots 217 ZES ZIMMER 4 218 Sensors and Accessories for precision power meters 8 9 Range extension by external Shunt and direct current input I T 218 ZES ZIMMER 5 218 Sensors and Accessories for precision power meters Introduction 1 Introduction 1 1 Safety precautions The following precautions are recommended to insure your safety and to provide the best conditions for the instruments e The installation of powermeter and current sensors may be accomplished only by trained technical personnel e Read the user manual carefully and respect the safety precautions e Do not use these products in medical related or any other equipment that may have a potential effect on human lives e Always observe the operating condit
142. sor PSU1000HF to the power meter LMG450 and to supply it by a sensor supply unit SSU4 In the connector to the LMG the adjustment data of the PSU head is available as well as it s serial number For this reason this connector is delivered already mounted to the PSU head and the screws are sealed This should prevent that the wrong PSU head is connected to the cable The connection is quiet simple e Switch all power off and plug the connector labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG to the LMG450 external sensor input ZES ZIMMER 90 218 Sensors and Accessories for precision power meters Current sensors e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least Measuring ranges sensor input limited by PSU1000HF to max 1000Apk Accuracy Use PSULOOOHF and LMG450 specifications to calculate the accuracy of the complete system Add 150mA to the primary current DC offset tolerance 2 21 8 Connection of the sensor with LMG500 Use PSU1000HF K and SSU4 with modifikation for PSULOOOHF s to PSU DSUBOF 7 to LMG HDSUB1i5m Figure 62 PSU1000HF K to connect the PSU1000HF to the LMG500 and the SSU4 This cable PSU10O00HF K is used to connect a precision current sensor PSU1000HF to the power meter LMGS500 and to supply it by a sensor supply unit SSU4 In the connector to the LMG the adjustment data of the PSU head is a
143. stand peak current and duration or rms current frequency and duration frequency range bandwidth lowest frequency to measure DC maximum frequency to measure you know about the wave shape dc sin square pulse di dt to be followed exactly A us ripple Apeak peak ripple frequency optionally please provide a graphic sketch of your signal which accuracy at which current value and frequency is aspired ZES ZIMMER 15 218 Sensors and Accessories for precision power meters Introduction which type of connection is applicable clamp on feed through or terminal min L_ mmx W__mmor diameter __ mm any other mechanical requirements are there restrictions on the inserted impedance in the current path at which working voltage does the current sensor operate working voltage against earth Utrms Upeak CAT__ frequency nominal voltage between phases current measurement at low voltage return or at high voltage potential du dt applied on primary a which type of application will be measured fe you know the approximatly power factor 10 combined with which type of power meter 10 1 LMG90 310 95 450 500 10 2 other instrument 11 environmental conditions 11 1 temperature range 11 2 pollution degree additional requirements comments ZES ZIMMER 16 218 Sensors and Accessories for precision power meters Current sensors 2 Current sensors 2
144. symbols may appear in this manual or on the product Warning risk of danger Refer to the operating instructions before using the device In these operating instructions failure to follow or carry out instructions preceded by this symbol may result in personal injury or damage to the device Caution risk of electric shock Earth ground terminal Protective conductor terminal Equipment protected throughout by double insulation or reinforced insulation Application around and removal from hazardous live conductors is permitted Do not apply around or remove from hazardous live conductors This symbol indicates that this product is to be collected separately This product is designated for separate collection at an appropriate collection point Do not dispose of as household waste For more information contact the retailer or the local authorities in charge of waste management 1 1 2 Definition of measurement categories e Measurement category IV corresponds to measurements taken at the source of low voltage installations e Measurement category III corresponds to measurements on building installations ZES ZIMMER 7 218 Sensors and Accessories for precision power meters Introduction e Measurement category II corresponds to measurements taken on circuits directly connected to low voltage installations e Measurement category I corresponds to measurements taken on circuits not directly connected to mains ZES
145. t of the sensor EEPROM automaticaly Measuring ranges sensor input limited by PSU600 to max 600Apk Accuracy Use PSU600 and LMG500 specifications to calculate the accuracy of the complete system Add 90mA to the primary current DC offset tolerance 2 19 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is out of responsibility of ZES ZIMMER ZES ZIMMER 81 218 Sensors and Accessories for precision power meters Current sensors 2 20 Precision current transducer 700A PSU700 PAT ua HOLES gt MOUNTING 2x 6 9 MOUNTING HOLES 67 ij 109 Figure 57 Dimensions of the PSU700 2 20 1 A Safety warning Always connect the sensor first to the meter and afterwards to the devic
146. t clamp 1000A 1A LMG Z322 oo eeeccceseeeceesteceeeteeeeeanees 28 2 7 Error compensated AC current clamp 1000A L45 Z10 Z11 30 2 8 DC current clamp 1000A L45 Z26 eeecccesesececeeneceesteeeceeneeceeennees 32 2 9 AC current clamp 3000A 1A LMG Z329 oo ceecccceessceceesteceseseeeeeeanees 34 2 10 Error compensated AC current clamp 3000A L45 Z16 Z17 36 2 11 Precision current transformer 1500A LMG Z502 Z505 Z5 10 Z520 39 2 12 Precision current transformer 4000A LMG Z542 Z545 Z550 42 2 13 Precision current transformer 1OkA LMG Z562 Z570 000000008 45 2 14 Precision current transformer 1OkA LMG Z582 Z590 00000008 48 2 15 Precision current transducer 60A PSU60 cccccceeeeeeeeeeeeeeeeeeees 51 2 16 Precision current transducer 200A PSU200 cccccccceeeeeeeeeeeeeeees 57 2 17 Precision current transducer 200A PSU200HP ccceceeeeeeees 63 2 18 Precision current transducer 400A PSU400 o e 68 2 19 Precision current transducer 600A PSU600 cc cece eeeeeeeeeeeeeeeees 74 2 20 Precision current transducer 700A PSU700 c cccccceeeeeeeeeeeeeeees 82 2 21 Precision current transducer 1000A PSU1O00HBP 00000 88 2 22 Precision current transducer 2000A PSU2000 esce 93 2 23 Precision current transducer 2 5kA SAT2000 SAT2000hf SATS000 99 2 24 Hall current sensors 50 100 200A L45
147. t sensor with more than the measurable TRMS value Please refer to chapter 1 1 Safety precautions 2 24 2 Specifications and accuracies Accuracies based on sinusoidal current ambient temperature 23 3 C calibration interval 1 year conductor in the middle of the hall sensor ZES ZIMMER 109 218 Sensors and Accessories for precision power meters Current sensors Use HALLxx and LMG specifications to calculate the accuracy of the complete system This sensors are supplied by the HD15 sensor connector of the LMG 2 24 3 Sensor operation without supply It is important to assure a stable power supply of the sensor before switching on the load current The operation of the sensor with load current and without supply will cause damage of the sensor and or of the LMG supply unit To remove the LMG supply unit from the test location without removing the sensors from the current path disconnect the HD15 plug from the LMG and connect all of the 15pins together with ground shield of the plug To do this the load current has to be switched off 2 24 4 Connection of the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 24 5 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 2 24 6 Connection of the sensor with LMG450 Use sensor input you get the
148. tage class H and pollution degree 2 according ITEC61010 1 EMC EN55011 EN50082 Dimensions Desktop 320mm W x 49mm H x 307mm D 19 rack 63DU x 1HU x 360mm Output voltage 15V 2 max 500mA on each jack Climatic class KYG according to DIN 40040 een ose nminy a mn ep nnn ZES ZIMMER 160 218 Sensors and Accessories for precision power meters Accessories 6 2 2 Technical drawings 40 306 __ _ i E ryt L st LD X lt ON wo 4 A Ul 4 W er Len y 7 A j x J J f F y m 483 c ya eQ E il SSU4 Sensor Supply Unit GH i pawor Channel 1 Channel 2 Channel 3 Channel 4 2 SNF m ie oO si o o ie a Gyi F k O d as00000000000000000 0000000000RAA0000 O IP O nett Cosme 1 Cumi 2 Comme 3 Chanel 4 Al J ce O CH CE ZA meray nent To poe ce hk cme oer tb ev covert N y To Instrumen To PSU m Figure 106 Dimensions of the SSU4 In the Figure 106 you see the desktop instrument also attended the angles for rack mounting 6 2 3 Connectors 6 2 3 1 9 Pin SUB D connectors for the sensors Via the following connector the sensors e g PSU600 L45 Z29 xxxx ar
149. tation speed 6 10 3 Description Incremental encoders speed sensors with TTL technology supply 5V and GND or HTL technology supply 5V and 5V can be connected There are four colour coded measuring ranges of the adapter to align with different pulse rates Z of the incremental encoder and maximum revolutions per minute Nmax Attention Read measuring value Idc only this presents exact speed values according to absolute value and sign depending on sense of rotation Positive output voltage is seen in case A signal leads electrically by 90 to B signal This equates usually to clockwise rotation when looking onto the encoder shaft ZES ZIMMER 177 218 Sensors and Accessories for precision power meters Accessories 6 10 4 Ripple As a matter of principle of frequency to voltage conversion there is a ripple at low revolution on output voltage Built in filters are optimised for short settling time without overshooting In case that remaining ripple is too high this can be reduced with the settings of LMG for example e Select adjustable lowpass filter in measuring channel e Extend the measuring cycle time e Average over a couple of measurement cycles Selection of the filter is always a compromise of fast reaction on variation of input signal and reduction of ripple on output signal The user can find optimal setting weighing these antithetic approaches 6 10 5 Incremental encoders with two 90 degree phase shifted a outp
150. the following figure you can see an programming example for 1875 Ampere ZES ZIMMER 95 218 Sensors and Accessories for precision power meters Current sensors Programming plug P1 female male P2 Connector to Connector transducer head to cable o e i 14 ia i 2 i o 15 e 15 2 2 4 4 o 17 E H 6 6 o e 19 7 T Ble pa CG s2 10 10 e 23 ch 1 24 r 12 12 25 1 13 programming wiring Figure 65 Schematic of the PSU2000 programming plug for 1875A 2 22 7 Supply unit PSU S20 Magazin 19 for electronic board and supply of 1 to 3 PSU2000 Input voltage 230V 115V on request 10 50 60Hz 40W per sensor Dimensions W D H 19 300mm 3 units Connection PSU S20 to PSU2000 standard length 2 5m special 25 pole DSUB cable optional available on request 5m 10m ZES part number PSU2000 K xxx where xxx is the cable length in m 2 22 8 Pictures of the PSU2000 connection ities 4 ee Single channel PSU2000 system ZES ZIMMER 96 218 Sensors and Accessories for precision power meters Current sensors Transducer head Transducer Head i Transducer End of Cable o o f z marked with Head a A aa S Programming Plug Programming plug 2 22 9 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 22 10 Connection of the sensor with LMG95 direct c
151. the revolution will be presented correctly in value 1 min on the display The unit will however be A or V Displayed 1 465kA means 1465 1 min For further user friendly presentation utilise capabilities of LMG500 built in formula editor and user defined menu 6 10 8 Pin assignment 9 pin D Sub connector male to incremental encoder Raa I al Function Supply Supply GND Input A Input B No connection Screen 5V 5V on internal test pins on GND screen ZES ZIMMER 179 218 Sensors and Accessories for precision power meters Accessories 6 10 9 Pulse input A and B Permissible input voltage Ulowmin 30V at 1 4mA Ulowmax 0 8V at 0 001mA Uhighmin 2V at 0 002mA Uhighmax 30V at 1 2mA Input resistance 1Mohms at 0V lt Uin lt 5V 22kohms at 30V lt Uin lt 30V 6 10 10 Encoder supply Voltage 5V 10 Load max 100mA 6 10 11 Connection of the sensor with LMG90 310 95 not possible 6 10 12 Connection of the sensor with LMG450 not possible use L45 Z18 6 10 13 Connection of the sensor with LMG500 Plug and use solution like current sensors Use current channel ZES ZIMMER 180 218 Sensors and Accessories for precision power meters Accessories 6 11 Synchronisation adapter with adjustable lowpass filter L50 Z19 Figure 121 L50 Z19 6 11 1 A Safety warning 1 first connect the clamp to L50 Z19 2 connect L50 Z19 to LMG500 Sync input and switch the power meter on 3 the
152. the sensor with LMG90 310 The use with LMG90 and LMG310 is not possible 2 26 5 Connection of the sensor with LMG95 Use L95 Z07 internal supply via LMG and the Isensor external shunt input Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 ZES ZIMMER 117 218 Sensors and Accessories for precision power meters Current sensors 2 26 6 Connection of the sensor with LMG450 The use with LMG450 is not possible 2 26 7 Connection of the sensor with LMG500 Use L50 Z14 internal supply via LMG you get the following ranges HALL300 HALLSO0 HALL1000 HALL2000 ZES ZIMMER 118 218 Sensors and Accessories for precision power meters Current sensors 2 27 Rogowski flex sensors L45 Z32 FLEXxx DEAN O HDSUBI1SM Fo LMG 450 Clip on rectangular a x b Clip an round Figure 83 Dimensions of the L45 Z32 FLEX xx 2 27 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cable without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 2 27 2 Specifications Frequency range 10Hz 5kHz 10Hz 5kHz 10Hz 5kHz Phase Shift at 50 60Hz cable in middle of the head ZES ZIMMER 119 218 Sensors and Accessories for precision power meters Current sensors Clip on round diameter 110mm 200mm
153. tial may cause differential input errors Precision wideband current transformer WCT e best bandwidth excellent power accuracy because of low phase error e galvanic separation user defined isolation with isolated primary measuring line e good reliability with passive design no power supply needed e no DC measurement ZES ZIMMER 14 218 Sensors and Accessories for precision power meters Introduction 1 5 Support request If you need help finding the best suitable current sensors for your application please don t hesitate to contact ZES the engineers will help you Please fill out this fax form two pages and send it to 49 6171 52086 or describe the following points in an email send to sales zes com name wren anna anna nnn nanan nena nnn nnn nn nena anna nnn nnn nnn nnn n enna COMPANY street ttn nnn nn nn nn nn nn nnn nn nnn nn nn nnn nn nnn nn nnn nnn nn nese nncnnnann city country phone fax email s project name current range lowest current to measure Irms maximum current to measure Irms Ipeak overload not to be measured only with
154. to short circuit the current output I with I of the sensor to avoid dangerous voltages This open loop voltages would be hazardous for the user and might damage the sensor 2 33 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 33 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 33 7 Connection of the sensor with LMG450 Use direct current inputs I and I 2 33 8 Connection of the sensor with LMG500 Use HF current inputs Ihf and I You get the following measuring ranges ZES ZIMMER 146 218 Sensors and Accessories for precision power meters Current sensors ZES ZIMMER 147 218 Sensors and Accessories for precision power meters LMG95 connection cables and adapter 3 LMG95 connection cables and adapter 3 1 Adapter for the use of HD15 Sensors with LMG95 L95 Z07 Figure 99 Adapter for the use of HD15 Sensors with LMG95 L95 Z07 3 1 1 A Safety warning Always connect the sensor first to the meter and afterwards to the device under test Connecting cables without savety isolation Avoid contact to hazardous voltage Please refer to chapter 1 1 Safety precautions 3 1 2 Specifications ASZ 5 20 sz si Plug the DSUB connector to LMG95 external supply and the two 4mm jacks to LMG95 ext Shunt L ZES ZIMMER 149 218 Sensors and Accessories for precision power meters LMG95 connecti
155. truments with current input Use sensor suppy unit SSU4 with modification for PSU60 200 400 700 and PSU K3 K5 K10 and SSU4 K L31 and direct current inputs I and I ZES ZIMMER 70 218 Sensors and Accessories for precision power meters Current sensors 2 18 6 Connection of the sensor with LMG95 Use PSU60 200 400 700 K L95 supply via LMG95 no additional error terms but only one range and not suitable for small currents With slightly less accuracy at fullrange but with considerably more dynamic range and so better accuracy at small currents it is also possible to use PSU400 K L50 and L95 Z07 With this assembly you get 8 ranges and a good dynamic down to a few Amps but a small additional error term from the PSU400 K L50 cable Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 It depends on the magnitude and the dynamic of the measuring current which connection is better 2 18 7 Connection of the sensor with LMG450 PSU400 K L45 Use PSU400 K L45 and SSU4 standard version without modification to PSU DSUBOf 2 5m AL to LMG HDSUB15m to SSU 0 8m DSUBOF vse Figure 47 PSU400 K L45 to connect the PSU400 to the LMG450 and the SSU4 This cable PSU400 K L45 is used to connect a precision current sensor PSU400 to a power meter LMG450 and to supply it by a sensor supply unit SSU4 In the connector to the LMG450 the adjustment data of the PSU400 head
156. ture 23 3 C calibration interval 1 year conductor in the middle of the transformer ZES ZIMMER 46 218 Sensors and Accessories for precision power meters Current sensors Amplitude error of measuring value Phase error at 48 to 66Hz Current Z562 Z570 50A to 250A lt 0 05 lt 0 1 lt 0 3 lt 0 15 250A to 1000A lt 0 03 lt 0 07 lt 0 15 lt 0 1 1000A to 2500A lt 0 02 lt 0 05 lt 0 1 lt 0 08 2500A to 6000A lt 0 02 lt 0 04 lt 0 1 lt 0 06 6000A to 10kA lt 0 02 lt 0 05 lt 0 1 lt 0 08 at 30Hz to 48Hz and 66Hz to 440Hz twofold errors at 15Hz to 30Hz and 440Hz to 5kHz threefold errors Use LMG Z562 Z570 and LMG specifications to calculate the accuracy of the complete system 2 13 4 Sensor operation without connection to LMG It is important to assure a good connection from the sensor to the LMG before switching on the load current The operation of the sensor with load current and without connection to the LMG will cause damage of the sensor and is dangerous for the user 2 13 5 Connection of the sensor with LMG90 310 or other instruments with current input Use direct current inputs I and I 2 13 6 Connection of the sensor with LMG95 Use direct current inputs I and I 2 13 7 Connection of the sensor with LMG450 Use direct current inputs I and I Or use L45 Z22 and sensor input for better dynamic range but small additional error term 2 13 8 Connection o
157. ty precautions LMG Z601 is an accessory for the precision power meters LMG with a high bandwidth The high frequency design provides best accuracy at high frequencies It also simplifies the measurement of output power in high frequency applications with floating potential The current transformer has a 1A current output for the direct connection to the LMG current input LMG Z601 is optimized for the LMG500 and its Ihf input Because of the low and over all ZES ZIMMER 142 218 Sensors and Accessories for precision power meters Current sensors measuring ranges constant impedance of this input best accuracy can be achieved For the connection of LMG Z601 to the precision power meter LMG use narrow twisted laboratory leads not longer than needed or in HF applications slightly better 4mm to BNC adaptor and coaxial cable 2 32 2 Specifications max 100mOhms for the specified accuracy Isolation 600V CATII 1000V CATI Test voltage output Ilow to 20mm busbar for higher voltages the primary lead has to be isolated according to the working voltage of the system Output connection safety sockets 4mm Temperature range 10 C to 70 C Through hole diameter 23mm 20mm 5mm 65m 2 32 3 Accuracy Accuracies based on no DC current component ambient temperature 23 3 C calibration interval 1 year burden 100mOhms max 1m twisted laboratory leads or coaxial cable Full power accuracy for measuring current fr
158. ucer head is connected to the electronics and supply rack 5000A This LED is lit yellow when a SAT5000 transducer head is connected to the electronics and supply rack OVERLOAD This LED is lit red when the current passing through the transducer head exceeds 130 of the maximum current for the transducer head including programming or the transducer head saturates ZES ZIMMER 102 218 Sensors and Accessories for precision power meters Current sensors 2 23 5 Status Interlock connector All signals on the Status Interlock port are floating relay type All signals are therefore isolated from the electrical circuits of the unit Maximum allowed voltage on the relay switches is 33VAC or 70VDC Exceeding this limit may cause malfunction or damage the equipment DSUB9 male pin assignment pinl Normal operation on When the unit status is OK Normal operation this pin is connected to the Normal operation common pin pin2 Normal operation off When the unit status is not OK error overload warning etc this pin is connected to the Normal operation common pin3 Ip Low common This pin is connected to either Ip Low on or Ip Low off depending on the unit s status pin4 Overload warning on This pin is connected to the Overload common pin when the current through the transducer head exceeds 10 of the maximum programmed current pin5 Overload warning Off This pin is connected to the Overload common pin when the unit is in
159. upply unit side 1 Systems with supply via LMG Disconnect the HDSUB15 plug from the LMG and connect all of the 15 pins and the shield at the cable plug together 2 Systems with supply via supply unit SSU4 Disconnect the HDSUB15 plug from the LMG and disconnect the DSUB9 plug from the supply unit SSU4 Connect all of the 15 pins and the shield at the LMG cable plug together and connect all of the 9 pins and the shield at the SSU4 cable plug together To do this the load current has to be switched off 2 17 5 Connection of the sensor with LMG90 310 or other instruments with current input Use sensor suppy unit SSU4 with modification for PSU60 200 400 700 and PSU K3 K5 K10 and SSU4 K L31 and direct current inputs I and I ZES ZIMMER 65 218 Sensors and Accessories for precision power meters Current sensors 2 17 6 Connection of the sensor with LMG95 Use PSU60 200 400 700 K L95 supply via LMG95 no additional error terms but only one range and not suitable for small currents With slightly less accuracy at fullrange but with considerably more dynamic range and so better accuracy at small currents it is also possible to use PSU200HF K L50 and L95 Z07 With this assembly you get 8 ranges and a good dynamic down to a few Amps but a small additional error term from the PSU200HF K L50 cable Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95 Z07 It depends on the magnitude and the dynamic
160. urrent input I and I 150mA 1 2A range 4 ranges with L95 O8 2 modification 10mA 1 2A range 8 ranges with LMG SH001 1 ohm 30mA 1A range 6 ranges ZES ZIMMER 97 218 Sensors and Accessories for precision power meters Current sensors 2 22 11 Connection of the sensor with LMG450 direct current input I and I 600mA 1 2A range 2 ranges with L45 Z22 30mA 1A range 6 ranges 2 22 12 Connection of the sensor with LMG500 direct current input I and I 20mA 1 2A range 7 ranges ZES ZIMMER 98 218 Sensors and Accessories for precision power meters Current sensors 2 23 Precision current transducer 2 5kA SAT2000 SAT2000hf SAT5000 50 IOUT cs 200 0 169 0 186 5 a Figure 66 Dimensions of the SAT2000 SAT2000hf transducer head Figure 67 Dimensions of the SAT5000 transducer head ZES ZIMMER 99 218 Sensors and Accessories for precision power meters Current sensors Figure 68 Dimensions of the SAT supply unit and electronics COUN Figure 69 SAT5000 three phase system Figure 70 SAT technical current direction 2 23 1 A Safety warning All transducer heads must be connected to earth ground First connect the transducer head to the unit using the transducer head cable and mount the programming plug in the connector on the head not necessary with SAT2000hf connect the power meter switch on the SAT supply rack and afterwards switch on the device unde
161. usually negative and has to be compensated with a positive compensation value ZES ZIMMER 212 218 Sensors and Accessories for precision power meters FAQ frequently asked questions Knowledge base 8 6 Multiple external sensors in a test bench with LMG450 LMG500 A common situation in a test bench is that different sensors have to be connected alternately to the same power meter channel controlled by a PC program For ZES sensors with included eeprom and error compensation HDSUB15 plug the relevant signals have to be redirected e g by a relais Relevant are all 10 signals of the pins 6 to 15 of the 15 pin jack in the LMG450 or L50 Z14 Important e first you have to disconnect the active sensor therefore please disconnect or switch off the primary current then disconnect pins 6 to 15 with a relais wait for at least 3s now you can connect the new sensor connect pins 6 to 15 with a relais then connect or switch on the primary current don t allow primary current without secondary connection and supply of the sensor please use very short and shielded connection cables from the LMG to the switchbox and inside the switchbox to aviod EMC problems a maximum length of Im between LMG and the HD15 plug of the sensor is allowed pin assignment of the HDSUB15 connector of LMG450 or L50 Z14 pinl to pin5 nc pin6 negative supply 12V LMG450 or 15V LMGS500 pin7 positive supply 12V LMG450 or
162. ut interrupting the circuit e medium bandwidth low accuracy no DC measurement Error compensated AC current clamps e easy to use the sensor can be clamped on the circuit to be measured without interrupting the circuit e medium bandwidth high accuracy no DC measurement Precision current transformers Z5xx e very high accuracy e the circuit to be measured has to be opened and then connected to the transformer e small bandwidth no DC measurement Current transducer Hall ZES ZIMMER 13 218 Sensors and Accessories for precision power meters Introduction e low cost e medium to high bandwidth medium accuracy low DC measurement accuracy e the circuit to be measured has to be opened to mount the Hall sensor Current transducer PSU e very high DC accuracy excellent linearity e very high accuracy at 50 60 Hz e high small signal bandwidth medium bandwidth at full scale level e the circuit to be measured has to be opened to mount the PSU sensor Current transducer SAT e very high DC accuracy excellent linearity e medium accuracy at 50 60 Hz e high small signal bandwidth medium bandwidth at full scale level e the circuit to be measured has to be opened to mount the PSU sensor External shunts e very exact measurement on high frequencies small phase error e no galvanic isolation e especially at high currents significant power losses and errors due to self heating e very small burden voltage at high voltage poten
163. uts Rosson ole a Unit Left most Left Right most switch adjacent of 1 min 144000 576000 2304000 9216000 revolution speed Specified tolerance of m value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 of m range Mar pulse dopul 2400 9600 38400 153600 frequency using Formula for Scale imin 1152000 Z 1152000 Z 1152000 Z 1152000 2 Z is the number of wa per rotation of the used incremental encoder speed eaa ZES ZIMMER 178 218 Sensors and Accessories for precision power meters Accessories 6 10 6 Incremental encoders with single pulse outputs Potion vie _ Unit Left most Left Right most switch adjacent of 1 min 288000 1152000 4608000 9216000 revolution speed Specified tolerance of m value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 of m range Mas pulse anput 4800 19200 76800 153600 frequency using Formula for Scale imin 2304000 Z 2304000 Z 2304000 Z 1152000 2 Z Z is the number of a per rotation of the used incremental encoder speed Kee The recognition of the rotating direction is not possible The output voltage is always negative if input B is left open The output voltage is always positive if input B is tied to pin supply 5V 6 10 7 Scaling In range menu of LMG500 you can set the calculated scale value of the last line from above mentioned chart depending on the pulse rate Z per rotation of the used incremental encoder Then
164. vailable as well as it s serial number For this reason this connector is delivered already mounted to the PSU head and the screws are sealed This should prevent that the wrong PSU head is connected to the cable The connection is quiet simple e Switch all power off and plug the connector labeled SSU 4 to the SSU 4 e Plug the connector labeled LMG to the LMG500 with Sensoradapter L50 Z14 ZES ZIMMER 91 218 Sensors and Accessories for precision power meters Current sensors e Now you can switch on the power and make your measurements The power of the EUT should be switched on at least Figure 63 L50 Z14 Measuring ranges sensor input siasa e limited by PSU1000HF to max 1000Apk Accuracy Use PSULOOOHF and LMG500 specifications to calculate the accuracy of the complete system Add 150mA to the primary current DC offset tolerance 2 21 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is
165. ws are sealed when you have ordered the package PSU400 L50 This should prevent that the wrong PSU400 head is connected to the cable The connection is quiet simple Switch all power off plug the connector labeled LMG500 to the adapter L50 Z14 mounted on the LMG500 current channel Now you can switch on the power and make the measurements The rangenames of LMG500 the sensor name and calibration data are read out of the sensor EEPROM automaticaly ZES ZIMMER 72 218 Sensors and Accessories for precision power meters Current sensors Measuring ranges sensor input limited by PSU400 to max 400Apk Accuracy Use PSU400 and LMG500 specifications to calculate the accuracy of the complete system Add 60mA to the primary current DC offset tolerance 2 18 9 Connection elongation To use the current sensor with a longer connection length between power meter and PSU connect a well shielded 1 1 extention cable between the PSU DSUB9f plug and the PSU connection cable DSUB9m plug and screw both plugs together This extention cable is available at ZES LMG Z DVxx Required length up to 15m is to be given by customer along with the order Interference from strong electromagnetical disturbed environments may affect the measurement accuracy This depends from the respective installation in the complete system and is out of responsibility of ZES ZIMMER ZES ZIMMER 73 218 Sensors and Accessories for precision power met
166. xisting Device C Update Digi RealPort Software To continue click Next Figure 126 e Select the device Digi RealPort Setup Wizard Select Device From the list below select the device you would like to use If your device is not in the list select lt Device not listed gt and click Next Devices found on your network IP Address MAC Address b 192 168 2 132 00 40 9D 2E 37 1F Digi Connect SP RS232 82 192 169 2144 00 40 9D 29 31 4B Digi One SP lt Device initiated RealPort gt Device not listed gt gA Searching Don t see your device Click here for help Refresh lt Back Cancel Figure 127 e and assign a virtual COM port ZES ZIMMER 186 218 Sensors and Accessories for precision power meters Accessories Digi RealPort Setup Wizard Describe the Device Enter information for the device you would like to use Device Model Name Digi Connect SP AS232 Network Settings COM Port Settings Device Features IP MAC DNS C TCPL No Ports Encryption 192 168 2 132 I Authentication Default Network Profile Starting COM TCP Typical Settings x COMS bd RealPort TCP Skip Modem PnP 771 H Install Options I Wait for COM open request Help Figure 128 The power meter LMG is now accessible via this virtual COM port 6 12 8 Configuration and Management by web interface e Start your Browser and login to the IP adress obtained to your LAN adapt

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