CT-600/CT-1000 Series User`s Manual
Contents
1. CAENEIS eor For Science Ed 9 sd pa at 1 VLAENeIs g Gear For lt 2Clence Bus gt lt DC Curren Transducer OUT OK Z9 ele All Rights Reserved CAEN ELS d o o Rev 1 2 November 2014 CT 600 CT 1000 User s Manual Q CAEN ELS d o o Kra ka ulica 2 6210 Se ana Slovenija Mail info Qcaenels com Web www caenels com CT 600 CT 1000 User s Manual Table Of Contents L INIBODUCTIUIN is oe n ENSIS NA Ge ee NM GR GER EG s be RR sni 9 1 1 Q2 CURRENT TRANSDUCERS OVERVIEW eec vanno ee ee vana anna 9 1 2 CT 600 CT 1000 MODELS AND VERSIONS ee ee ee ee ee ee ee nnn 10 2 INSTALLATION AND OPERATION 0000 000000000000000000000000000000000000000000000000000 12 2 1 MECHANICAL CONSIDERATIONS ee ee ee ee ee ee ee ee ee ee ee aaa aa ee ee ee ee ee ee 12 2 2 CONNECTOR PINOUT 0305 2 eue eie sa spe GE de 13 2 3 SECONDARY SIDE SIGNALSa eese hene ee aa aaa ee ee ee ee aa ee estates ee ee ee ee ed 14 2 3 1 Power Supply sm nno 14 2 3 2 Secondary Current current versions only sesse sees sesse ese ee ee anno 14 2 3 3 Voltage Output V versions only 14 2 3 4 STAM EE N 15 2 4 Matie mm RO N ee 17 2 5 PRIMARY CURRENT PATH EE EE EE N oe 18 2 6 FULL SCALE CURRENT EE ee ig zao ee se ee ee ee ed ee oe ee ee ed eue 19 QN lIONS e e vo vo vo vo rao eoo ao eoo os s A 20 ma N SPECIFICATIONS assseseeeecsesoeeo eoo es ee2. 214 5 V when the transducer is not In the configuration presented in Figure 6 the current transducer can be easily interfaced to a digital microcontroller a Digital Signal Processor or an FPGA supplied by a 43 3V voltage source Please note that the 3 3V supply and the OK SIGNAL is referred to DGND potential which can be the same or different from the GND potential on which the transducer device is supplied from The OK SIGNAL is found to be at low level 0 4V when the transducer is correctly working and at high level 23V when not Dc Current ansduce e Figure 7 STATUS OUT OK indications The OUT OK green light is on as shown in Figure 7 whenever the device is correctly working and regulating secondary output current 1 e zero flux is established and secondary circuit is closed on the shunt resistor external or internal in the V versions a CT 600 CT 1000 User s Manual Installation and Operation 2 4 Mounting The current transducers can be mounted in different configurations depending on user s needs and opportunities but heatsink shall never be faced to the floor The transducers are designed to be used in rack mount applications by means of any of the two 2 different 4 hole patterns placed in different sides of the mechanical case Four holes are present on the bottom of the device as indicated in the Figure 8 Mounting Mounting B Holes Figure 8 bottom mounting holes
3. 00 D 21 4 1 EE LENT INPERIAL A DR 1 22 4 2 INSULATION CHA RA EFERFSF G DERE 24 4 3 EXTERNAL SHUNT RESISTOR ea es aa aaa nean aa aaa ee aaa aaa aan aan an aaa ee ee ee ee aa 25 5 MECHANICAL DIMENSION e eee eee sesse esse ooo o o BAR 26 CT 600 CT 1000 User s Manual Document Revisions lo September 16 2014 1 0 recommendation section 1 2 12 November 3 2014 Manual graphics changed CT 600 CT 1000 User s Manual PS1215 Power Supply Recommendations We strongly recommend using this product with the CAEN ELS PS1215 power supply which has been especially deigned in order to obtain low noise operation and it is suited for DCCT measurement system where switching power supplies could corrupt measuring accuracy precision and noise BNC connection for VoltagesQutput DCCT Power Good LED monitors DCCT side AC Line Input SUB D connector The power supply is available in two different versions one to be used with the current output DCCTs and one with the voltage output ones the PS1212V is shown in the previous image Product Code Description PS1215V AC DC Single Output Dual Voltage 15V Low WPS1215VXAAA Noise Power Supply 27W max 3m cable with DB 9 and BNC Voltage Output PS12151 AC DC Single Output Dual Voltage 15V Low WPS1215IXAAA Noise Power Supply 27W max 3m cable with DB 9 and banana plugs Current Output For more
4. 600 V over voltage cat IlI reinforced insulation pollution degree 2 Between primary and secondary shield Parameter RMS voltage for AC insulation test 5 4 KV 50 60 Hz 1 min Clearance primary secondary Shorter distance path Table 5 Insulation characteristics The voltage insulation category could be improved if insulated cable is used for the primary circuit 24 CT 600 CT 1000 User s Manual Technical Specifications 4 3 External Shunt Resistor The maximum value of the external shunt resistor that can be connected on the Is output pin in the current output versions is shown hereafter in the following charts CT 600 65 60 55 50 45 40 35 30 25 20 15 Maximum Shunt Resistor O 125 150 175 200 225 250 275 300 325 350 375 400 I mA Figure 13 CT 600 maximum external shunt resistor Current version only CT 1000 70 65 60 55 50 45 40 35 30 25 20 15 10 lt Maximum Shunt Resistor Q 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 I mA Figure 14 CT 1000 maximum external shunt resistor Current version only Mechanical Dimensions CT 600 CT 1000 User s Manual 5 Mechanical Dimensions The mechanical dimensions of the CT 600 and CT 1000 case are hereafter presented all dimensions are in mm Figure 15 Mechanical drawings z O
5. as possible from the DCCT Head CT 600 CT 1000 User s Manual Installation and Operation 2 6 Full Scale Current Rated full scale primary current can be easily changed by carrying out multiple turns on the primary conductor hole The full scale current can then be scaled by a factor of N with N number of turns of the primary conductor around the hole As an example see figure Figure 11 a primary full scale current of 600 A can be easily scaled by a factor 2 applying two primary turns and so the obtained full scale will be 300 A or by a factor 3 applying three turns and so the obtained full scale will be 200 A Figure 11 primary full scale current scaled by a factor 2 2 primary turns left and scaled by 3 3 primary turns right Do not apply rated nominal full scale primary current for example 600A for CT 600 when carrying out multiple turns on primary conductor hole Ordering Options CT 600 CT 1000 User s Manual 3 Ordering Options The CT 600 current transducers have two different versions differing by the secondary output signal types The ordering code 1s formatted as follows er gt 6 0 0 x Output Version empty current output V voltage output NOTE fields characters shaded in grey color are fixed The CT 1000 current transducers have also two different versions differing by the secondary output signal types current or voltage The ordering code 1s formatted as follows e T 1 0
6. manual Do not use the device if it 1s damaged Before you use the device inspect the instrument for possible cracks or breaks before each use Do not operate the device around explosives gas vapor or dust Always use the device with the cables provided Turn off the device before establishing any connection Do not operate the device with the cover removed or loosened Do not install substitute parts or perform any unauthorized modification to the product Return the product to the manufacturer for service and repair to ensure that safety features are maintained This instrument is designed for indoor use and in area with low condensation CT 600 CT 1000 User s Manual The following table shows the general environmental requirements for a correct operation of the instrument Environmental Conditions Operating Temperature Operating Humidity Storage Temperature Storage Humidity Requirements 0 C to 50 C 30 to 85 RH non condensing 10 C to 60 C 5 to 90 RH non condensing CT 600 CT 1000 User s Manual Introduction 1 Introduction This chapter describes the general characteristics and main features of the Es Current transducers 1 1 z cs Current Transducers Overview The Es current transducers family is based on a closed loop technology that allows accurate and precise monitoring of DC and AC currents with high bandwidth Main characteristics of the entire Es family are negligible t
7. pattern Other four holes are present on the rear side of the plastic cover and can be used in order to fix the device by means of self threading screws These holes are indicated in Figure 9 Fixing Holes Figure 9 rear mounting holes for self threading screws Installation and Operation CT 600 CT 1000 User s Manual The self threading screws can have a maximum length of 15 mm 2 9 mm diameter and the types that can be used are hereafter listed e UNI8119 e DIN 7504 P e ISO 15482 2 5 Primary Current Path A non symmetrical layout of the primary current return path may degrade the accuracy and the noise of the current transducer A cross section of the transducer plastic case illustrates what happens if the primary current is not equally distributed over the perimeter of the current transducer head Primary Current we N CI PU PUPPI GE GN GE GE DCCT Head Figure 10 primary current path non recommended layout left and recommended layout right Figure 10 left shows what happens if the primary current is routed over one side of the DCCT head the Magnetic flux density 1s higher in the area between the U path If the current path return is split in two or more paths over the DCCT Head the magnetic flux density is more homogenous over the perimeter and the resulting measurement will be more accurate If the split return path is not possible it is preferable to keep the retuning cable as far
8. pin has to be kept within 0 5 V Voer Venp 0 5 V In the voltage output V version of the transducers the current output pin Is pin 6 and its return pin 1 are not present Please note that output impedance for the V version models is 50 Q and it is low pass filtered with a 0 5 us time constant 2 3 4 STATUS Signal A STATUS signal obtained from the outputs of an optocoupler phototransistor Status and Status pins 8 and 3 is present on all versions Please note that the OK signal is not internally connected to the ground potential and can be connected to an external reference potential A green LED is also present on the front side of the DCCT indicating the correct operation of the devices A pull up resistor is needed between the OK and some supply voltage referred to the OK potential in order to correctly obtained the correct signaling Two examples on how to connect the OK and OK signals are hereafter presented in Figure 5 and in Figure 6 OK OK Figure 5 OUT OK signals connections using the 15V and the GND pins Installation and Operation CT 600 CT 1000 User s Manual OK DGND pa OK OK SIGNA Figure 6 OUT OK signals connections as digital interfacing to 3 3V Note that the connection scheme presented in Figure 5 is referred to the GND potential and the OK SIGNAL is at low level 0 4V if the current transducer is correctly working while itis at high level
9. s Manual 2 Installation and Operation General considerations and description of pinout and functionalities are herein presented 2 1 Mechanical Considerations Each version of the CT Series current transducer presents an embossed arrow with the CAEN ELS logo on one side of the plastic casing that indicates the verse of the positive primary current measurement This arrow can be seen in Figure 3 on the right side of the enclosure Embossed arrow indicating the verse of positive primary current JE IT P Poi Positive Current Negative Current Figure 3 embossed arrow indicating the verse of positive primary current r O CT 600 CT 1000 User s Manual Installation and Operation 2 2 Connector Pinout The CT 600 and CT 1000 have a standard D SUB 9 pin or commonly referred to as DE 9 in both their current output and voltage output versions The standard pin numbering to refer to 1s herein presented in Figure 4 Pin 9 Pin 6 Pins 5 Pin 1 Figure 4 D sub 9 connector pin numbering The pinout for the two versions are presented in Table 2 These two versions have current or voltage output pins and their signal returns CT 600 or CT 1000 CT 600V or CT 1000V Current Output Voltage Output ls return nc GND Status 5 15V nc 7 Vour return 15V Table 2 CT 600 and CT 1000 pinout Please note that pins not internally connected on the specific model are indicated i
10. 0 0 x Output Version empty current output V voltage output NOTE fields characters shaded in grey color are fixed VIN CT 600 CT 1000 User s Manual Technical Specifications 4 Technical Specifications Technical Specifications for current transducers of the CT 600 and CT 1000 series are herein presented Technical Specifications CT 600 CT 1000 Current Transformation Ratio N 1 1500 1 2000 Maximum DC Primary 600 A 1000 A Current Ip pc _ _ Maximum RMS Primary 424 708 A Current Ip nws Maximum DC Secondary 400 mA 500 mA Current Iso B F Maximum RMS Secondary 283 mA 354 mA Current Is rms External Shunt Resistor Value Rs 0 30 9 0 20 9 Small Signal Bandwidth 3 dB typ BW EE Equivalent Input Noise lt 1 5 ppm FS o 200Hz QBandwidth lt 10 ppm FS 50 kHz Output Voltage m Output Voltage Gain u 1 60 V A 1 100 V A V version Vour Irpc nanu Dia Current MEE V version lt 0 5 ppm C Temperature Coefficient TC typ lt 2 ppm C V version i 5 ppm Induction into Primary 0 100 kHz typ AL Offset with factory calibration lt 10 ppm FS Protection Signal OK Status Supply Voltage 15 V 6 15 V 3 Current Consumption 50 mA Is 21 Technical Specifications CT 600 CT 1000 User s Manual Secondary Coil Resistance Rsgc Connections D sub 9 connector Operating Tempe
11. emperature coefficient excellent linearity and extremely low noise The transducers CT Series family has a transiorm ratio between primary and secondary The transform ratio value depends over the CT Series model External plastic casing guarantees galvanic isolation between the primary and the secondary circuits in order to allow to current measurements at a different potential and simplifies interfacing when using the as the feedback element of current regulated power supplies The internal conductive casing guarantees higher noise immunity and reduces undesired noise pick up from external sources DC current transiormers and transducers represent the ideal replacement for systems where Hall effect sensors or shunt resistors are used as current sensing elements and better performances are needed Main application fields for these current transducers are precise and extremely stable regulated power supplies and power inverters Due to the excellent characteristics the Es transiormers can be used in a variety of calibration acceptance testing and quality control applications in the industrial and automotive fields Introduction CT 600 CT 1000 User s Manual 1 2 CT 600 CT 1000 Models and Versions The CT 600 and CT 1000 current transducers are available in two different versions that differ by the output type e standard secondary current output or e buffered voltage output where low temperature coefficient shunt resistor and low n
12. information or further details please refer to the PS1215 User s Manual o CT 600 CT 1000 User s Manual Safety information Warnings CAEN ELS will repair or replace any product within the guarantee period if the Guarantor declares that the product is defective due to workmanship or materials and has not been caused by mishandling negligence on behalf of the User accident or any abnormal conditions or operations Please read carefully the manual before operating any part of the instrument Z WARNINGZ Do NOT open the boxes CAEN ELS d o o declines all responsibility for damages or injuries caused by an improper use of the Modules due to negligence on behalf of the User It is strongly recommended to read thoroughly this User s Manual before any kind of operation CAEN ELS d o o reserves the right to change partially or entirely the contents of this Manual at any time and without giving any notice Disposal of the Product The product must never be dumped in the Municipal Waste Please check your local regulations for disposal of electronics products CT 600 CT 1000 User s Manual Read over the instruction manual carefully before using the instrument The following precautions should be strictly observed before using the device CAUTION Do not use this product in any manner not specified by the manufacturer The protective features of this product may be impaired 1f it 1s used in a manner not specified in this
13. n Table 2 as nc not connected Please DO NOT connect any signal to the pins indicated as Internal Use Installation and Operation CT 600 CT 1000 User s Manual 2 3 Secondary side Signals The signals on the secondary side of the CT 600 and CT 1000 current transducers are found on pins 1 2 3 6 7 and 8 please note that not all of them are present on all versions of the DE 9 connector 2 3 1 Power Supply Supply voltages Tor the CT 600 and CT 1000 have to be fed to pin 9 15V and to pin 5 15V of the D sub 9 pin connector both these voltages are referred to pin 4 GND Maximum current that can be drawn irom each one oi these supply voltages is of 450 mA for CT 600 and 550mA for CT 1000 a maximum of 50 mA for supplying the internal electronics circuits and a maximum of 400 mA for CT 600 or 500 mA for CT 1000 for the secondary current 2 3 2 Secondary Current current versions only On the standard current output versions the secondary current output Is scaled by its current transformation ratio is fed to pin 6 Current return pins are respectively found on pin 1 and on pin 7 Maximum secondary current depends over the full scale range and the current transformation ratio of the sensor For example for a CT 1000 the full scale range 1s 1000 A and its transformation ratio is 1 2000 thus its maximum secondary current is rated at 4500 mA An external shunt resistor which can be placed close to the use
14. oise amplifier are embedded in the internal electronics in the V model Connections for power supply and output signals are available through a standard D SUB connector also known as DE 9 The different models and versions of the CT 600 and CT 1000 are summarized in the following table Table 1 Product Code Model Description WCT600XAAAAA CT 600 600 A Primary Current 977 ME Current Output WCT600VXAAAA CT 600V 600 A Primary Current Voltage Output WCT1000XAAAA CT 1000 1000 A Primary Current C Current Output WCT1000VXAAA CT 1000V 1000 A Primary Current CL Voltage Output Table 1 CT 600 and CT 1000 versions and models The CT Series transducer with the current output acts mainly as a transformer with DC capability that converts a full scale bipolar primary current to a secondary current up to 400 mA The voltage output V version converts the primary bipolar full scale current to a secondary output voltage of 410 V e CT 600 CT 1000 User s Manual Introduction Front view of a CT 600 CT 1000 current transducer is presented in Figure 1 o 8 CAENels o beer For Science mm DC Curre Figure 1 front view of a CT 600 or CT 1000 Cres current transducer Rear view of the same current transducer where self threading holes for screws are visible is presented in Figure 2 Figure 2 rear view of a CT 600 or CT 1000 Cres current transducer Installation and Operation CT 600 CT 1000 User
15. r s desired measuring circuit to avoid the noise pick up is needed in order to convert the current signal to a voltage The voltage output pins Vo and Vo RET cannot be found on standard current output versions 2 3 3 Voltage Output V versions only A buffered output voltage signal 1s present on the voltage output versions of the transducers in order to allow easier connection of the DCCT to an external circuit or an Analog to Digital converter ADC The full scale output bipolar signal Vo pin 2 for V version is referred to Vo RET pin 7 and the behavior 1s as follows e 10V output if the primary current is equal to positive full scale of the sensor e 1OV output if the primary current is equal to negative full scale of the sensor GEES CT 600 CT 1000 User s Manual Installation and Operation This behavior can be resumed in the gain parameter G in V A expressed as the ratio between the transducer output voltage Vy Vy ggr and the primary current p Wo VvonET Ip Vo RET pin is not internally connected to ground GND pin 4 and it should be connected to ground directly using a single point connection e g on an external ADC ground pins or Vm pin The availability of this return signal is very useful in order to avoid additional ground loops and noise pickup on the voltage output version of the transducer Please note that the maximum differential voltage between the Vo RET and the GND
16. rature Range 0 C 50 C Mechanical Outer Dimensions 107 x 91 x 50 mm Primary Conductor 30 mm Hole Diameter d Maximum Weight 600 g Table 3 Technical Specification 4 1 Equivalent Input Noise The typical equivalent input noise of the transducers is hereafter presented as a function of the measuring bandwidth and of the output version The table and its graph are valid for both current and voltage output options CT 600 CT 1000 Bandwidth Equivalent Input Equivalent Input Noise ppm FS Noise ppm FS 200 Hz 1 5 1 7 EET EE EEN EE RN 10 kHz 5 9 6 8 we e n Table 4 Equivalent Input Noise typical values z CT 600 CT 1000 User s Manual Technical Specifications 8 7 Loo df INN 2 4 oo Noise CT 600 Equivalent Input Noise ppm FS se CT 1000 Technical Specifications CT 600 CT 1000 User s Manual 4 2 Insulation characteristics In the following table are represented the insulation characteristics of the CT 600 and CT 1000 current transducers Reference IEC 61010 1 conditions Raged insulation voltage RMS EP over voltage cat Ill basic insulation pollution degree 2 IEC 61010 1 conditions Raged insulation voltage RMS i over voltage cat III reinforced insulation pollution degree 2 EN 50178 conditions Raged insulation voltage RMS i over voltage cat IlI basic insulation pollution degree 2 EN 50178 conditions Raged insulation voltage RMS
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