Air Gap Sensor AGS
Contents
1. Non calib at Non calib 3 6 72 2 4 2 4 0 0 10 50 mm 0 0 10 50 mm Figure 9a AGS 50 output signal diagrams Air Gap Sensor AGS 51 Air Gap Sensor AGS 51 Vout lout Pole profile Output signal 0 20mA Vout lout Pole profile Output signal 4 20mA V mA V mA 10 20 10 20 Calibrated Calibrated Non calib Fe Non calib 2 8 5 6 2 4 1 2 0 0 5 50 mm 0 0 5 50 mm Figure 9b AGS 51 output signal diagrams 10 23 MIKROTREND AGS Installation and user manual 141129 4 Installation instructions 4 1 AGSC Signal Conditioner unit installation guide Please select AGSC signal conditioner enclosure type a Sealed enclosure with connectors prefered enclosure type use for Stator installation Water and oil proofed IP64 cable connectors allow for easy installation without opening enclosure cover Offset adjustment possible from outside without opening Practical and simple installation within door and hinge box for EMC protection of cable wires No need to open and no replacement of desiccant needed NOTE Sealed enclosure must be placed inside auxiliary door and hinge enclosure for EMC protection of connection wires Rubber grummet MIKROTREND Air Gap Signal Conditioner D HOT OPER SER SERVICEABLE PARTS INSIDE HO USER i HUMIDITY SENSITIVE CIRCUITS AGSC enclosure w connectors 131008 jpg Figure 10b AGSC Signal Conditioner unit enclosure with connectors CON mounting dimensions 112. ONLY MULTIPLE GROUND POINTS WILL CAUSE NOISE PICK UP AND CAN DAMAGE CONDITIONER UNIT ELECTRONICS 4 4 Power supply connection Power to AGSC signal conditioner unit shall be 24VDC 10 0 15A max Conditioner unit input has insulated DC DC converter allowing any pole to be grounded or floating power supply as well as daisy chain of several Conditioner units 4 5 Calibration The AGSP sensor probe and AGSC signal conditioner units are factory matched and calibrated for best performance However if needed may be calibrated at site For details please cantact www mikrotrend com 4 6 AGSP Sensor probe installation guide CAUTION AGSP sensor probe shall be handled with care Do not apply paint or silicone to the sensor surface Never pull or use excessive force on the sensor cable or preamplifier The sensor surface is treated with high quality insulation varnish it shall not be scrached as damage to semiconductive electrodes may occur 4 7 Placing the sensor Choose position for AGSP sensor probe considering number of sensors and machine poles True acurate rotor stator geometry can be obtained with only one Rotor mounted Air Gap Sensors and four Stator mounted Air Gap Sensors http www mikrotrend com wrm wireless hydrogenerator rotor monitor htm If Wireless Rotor AGS is not used than good practical results are achieved with 4 sensors per generator for diameters of less than 7 5 meters 8 sensors per generator with d
3. 11 meters ext dia 17 mm int dia 14 mm Operating temperature 220 C Three core shielded cable length 10 meters diameter 4 mm AGSC Air Gap Signal Conditioner 220x120x80mm AGS Shielding and grounding 141129 Ground conduit Ground Figure 15b Air Gap Sensor AGS Shielding and grounding 18 23 MIKROTREND AGS Installation and user manual 141129 4 12 Connection to AGSC conditioner unit The Figure 16 illustrates how to connect the multicore cable to the AGSC conditioner unit Pole profile output gives instantaneous air gap value measured by the sensor Fig 1b It is optocoupled and insulated from sensor ground and also from power supply negative Output shall be grounded at acquisition card input Output signal can be ordered as 0 20mA or 4 20MA NOTE When 0 10V output is needed instead of 0 20mA a current to voltage conversion resistor of 500 ohms should be placed at the end of line at the acquisition unit the lowest noise level Multicore shielded cable NOTE This shield a Conn 2 Optional 5000hm resistor for conversion from shall be connected 0 20mA to 0 10V or 4 20mA to 2 10V with blue wire Shall be at the end of line for lowest noise level Preamplifier Modification for high electrical noise environment Remove ground connection from electronics board Connect preamplifier to ground Alternative color code DO NOT PAINT AGS Wiring dia
4. 3 5mm x 10m Ground wire 6 g Figure 5 AGS 4S outline drawing EE Air Gap Sensor AGS 4S eta Air Gap Sensor AGS 4S out lou out lou V mA Pole profile Output signal 0 20mA V mA Pole profile Output signal 4 20mA 10 20 10 20 Calibrated Calibrated Non calib st Non calib 36 7 2 2 4 2 4 0 0 0 8 4 mm 0 0 0 8 4 mm Figure 5a AGS 4S output signal diagrams 7 23 MIKROTREND AGS Installation and user manual 141129 Not to scale AGS 7 55 Inverted edge mounted air gap sensor ere All dimensions in milimeter SENSING SURFACE Not to scale 2 7mm x 0 8m AGSC 7 5 Air Gap Signal Conditioner 220x120x80mm 2 Multicore shielded cable 1070mm 3 5mm x 10m Ground wire Q lt Figure 6 AGS 7 5S outline drawing Air Gap Sensor AGS 7 5S Air Gap Sensor AGS 7 5S ry Pole profile Output signal 0 20mA ry re Pole profile Output signal 4 20mA 10 20 10 20 Calibrated Calibrated Non calib oo Non calib 3 6 7 2 2 4 2 4 0 0 1 5 7 5 mm 0 0 1 5 7 5 mm Figure 6a AGS 7 5S output signal diagrams 8 23 MIKROTREND AGS Installation and user manual 141129 1 ee e 2 2 5mm x 0 8m DO NOT PAINT gt AGSC 13 Preamplifier Air Gap Signal Conditioner 220x120x80mm Multicore shielded cable 210X70mm Il 3 5mm x 10m Ground wire o 141119 AGS 13 Outline drawing Figure 7 AGS 13 outline drawing Air Gap Sensor AGS 13 Air Gap Sensor AGS 13 P
5. 23 MIKROTREND AGS Installation and user manual 141129 b Enclosure with cable inlets use for Rotor mounted and stand alone installation where no door and hinge enclosure is available for protection Cables can be installed with tight fitting oil and water proofed up to IP64 NOTE AGSC must be closed during operation contains humidity sensitive circuits Replace desiccant after opening and allow at least 12h to dry up before calibration and or measuring DO NOT OPEN NO USER SERVICABLE PARTS INSIDE HUMIDITY SENSITIVE CIRCUITS Air Gap Sensor AGS 25 Uout lout Pole profile Output signal 0 20mA V mA ignal output 0 20mA 2 Power input P 24VDC 0 15 A Ds 3 Calibrated Non calib GND Shield S Use optional 5000hm resistor for conversion from current outrut 0 20mA to voltage output 0 10V For the lowest noise level place resistor at the end of line acquisition card Figure 10d AGS Signal Conditioner unit enclosure with cable inlets CAB after S N 144701 Mounting holes OF Smm MIKROTREND Air Gap Signal Conditioner Part Ho ADSG 58 Serial Modt 1 10502 Measuring range 0 Sims Zora E Poser input MVOC 0 158 ee ret ed fi i TE KEEP CLOSED Os HUMIDITY ITIVE CIRCUITE KDE WHEN OPENED KEEP DESICGANT IN TKIHTLY SEALED PLASTIC BAG REPLACE DESICCANT PERIODICALLY 2 om E g S T T p lt CO4m Figure 10d AGS Signal Conditioner unit e
6. C enclosure Another option is to use AGSC x x CON enclosure which has connectors for cable installation and OFFSET adjustment is possible without opening For units after S N 144701 New enclosure for electronics with protection from humidity No desiccant replacement needed OFFSET adjustment trimmer shall be sealed with adhesive tape after adjustment Q Pole profile Output signal higher lower than nominal A 1 Check the distance to pole surface is within measuring range 2 Check Sensor or Triax cable for damages 3 If replacement sensor probe is connected to already installed old Signal Conditioner slowly turn OFFSET adjustment trimmer potentiometer until reaching desired output Please see also 5 1 Output drift with change of temperature humidity Q 50 100Hz and or higher frequency noise in pole profile signal A 1 Metallic cable conduits are mandatory for AGS installation Most important for generators with newer Switching power regulators in the Exciter circuit a source of broadband electrical noise Figure 15b 2 Check grounding scheme Ground loops shall be avoided Figure 15b Installations before S N 144701 will have lower noise level with modification as per Fig 16 Main ground connection shall be removed from AGSC electronics PCB and placed at the Preamplifier body Calibration is not affected with this modification Pole profile output signal is electricaly floating minus pole shall be groun
7. MIKROTREND AGS Installation and user manual 141129 Air Gap Sensor AGS Installation and user manual 1 23 MIKROTREND AGS Installation and user manual 141129 Contents 1e DNTV Le 3 2 AC Lene 4 2 1 AGS selection table rrrrnnrrrnnnrrrnnnrrrnnnrnrnnnrrrnnnrnrnnrenrnnsennansennnsnnnnn 4 3 Technical Specifications n anrnanennnnnnnnnnnnnnennnennnnnnnnnnnnnnennnennnn 6 4 Installation instructions n nn rannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennne 11 4 1 AGSC Signal Conditioner unit installation guide rrrrrnnnrrnnnnnnr 11 4 2 Appropriate location for AGSC signal conditioner unit 13 4 3 Grounding of AGSC signal conditioner Unit cc eeceseeeeeeeeee ees 13 4 4 Power supply CONNECTION cccccccsecceeeceeecceeeceeeceusecseeceeeeeaeenaees 13 ED Gre 13 4 6 AGSP Sensor probe installation Quide cccccesceseeeeseeeeseeeenees 13 4 7 Placing the Sensor rrnnrnnarennnrnnnnenanennnrnnnnennnennrnnnnennnennnnnnnnennsennnne 13 4 8 Preparing the Stator SUrfaCe rrrarrnnnrnnnnernnennnrnnanernnrnnnnnnnnennsnnnnn 14 4 9 Mounting the uVv hvrvrv v4v4erv4vrve4vervv4vvevvvrvir n 14 4 10 True Air Gap and offset rrrrarrrrnnrnrarrrrnnerrnnerrnnenranernnnennnnennnnennnn 17 Ati SN 18 4 12 Connection to AGSC conditioner unit cccceeeeeseeeeeeeeeeseeeeeees 19 5 Troubleshooting r anxrnnnnnnnnnnennnnnnnnnnnnnnennnennnnnnnn
8. ating varnish and a thin coat of adhesive will provide additional insulation After sanding once again clean stator surface with a rag moistened with isopropanol The glue surface should be flat without protruding laminations Slight unevenness can be tolerated 0 5mm Let the isopropanol evaporate at room temperature for about 10minutes before proceeding with glue application 4 9 Mounting the sensor CAUTION The AGSP sensor probe shall be aligned with the plane area of the rotor pole A small misalignement may be compensated with offset adjustment The sensor measuring surface shall be entirely covered by the pole surface We recommend three metods for fastening the sensors each with different curing times and operating temperatures Commonly found Epoxy adhesive is not flexible enough The sensor may come off due to uneven surface tensions during high load periods on generator 14 23 MIKROTREND AGS Installation and user manual 141129 A Double sided tape 150 C Double Side adhesive 3M Scotch Acrylic Foam Tape VHB 4611 With glue thickness of 1mm a foam type tape will allow stator unevenness of up to 0 3 mm Alowed temperatures of 149 C for weeks and short time up to 230 C hours Clean the back surface of the sensor with a cotton rag moistened with isopropanol Place double sided adhesive tape on the back side of the sensor Remove protective foil and carefully place sensor in position without touching adhe
9. ct capacitive type distance measuring sensor for measuring air gap in air cooled generators and electric motors AGS is made of low profile sensor probe with triaxial cable preamplifier and shielded cable Our unique Edge Mount type for wind generators and electric motors with very small air gap High stability carbon particle semiconductive electrode made from glass epoxy fiber FR4 DC DC insulated power supply Optocoupler insulated output 0 20 mA 0 10V or 4 20mA 2 10V Wide operating temperature range with 3 accuracy Full Scale Deflection Sensor probe 20 140 C Signal Conditioner 20 50 C Immune to magnetic fields dust and oil vapours EMI RFI 3 23 MIKROTREND AGS Installation and user manual 141129 2 Application Capacitive type distance measuring sensor for air cooled generators and electrical motors High sensitivity high resolution up to 50 microns with oversampling Measuring of air gap rotor vibrations rotor symmetry power angle CAUTION AGS is not certified for and shall not be installed in hydrogen cooled alternators 2 1 AGS selection table In order to ensure measurement headroom please select Air Gap Sensor measuring range according to the true air gap range per Table 1 Given dimensions are absolute maximum values Actual value of the true air gap shall be selected as close to the middle of true air gap range as possible If in doubt please contact Mikrot
10. d s General terms and conditions of sale http www mikrotrend com PDE Selling Policy GT05c pdf supplied at the time of order acknowledgment Mikrotrend warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Mikrotrend s standard warranty Testing and other quality control techniques are used to the extent Mikrotrend deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed Mikrotrend assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Mikrotrend components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards Mikrotrend does not warrant or represent that any license either express or implied is granted under any Mikrotrend patent right copyright mask work right or other Mikrotrend intellectual property right relating to any combination machine or process in which Mikrotrend products or services are used Information published by Mikrotrend regarding third party products or services does not constitute a license from Mikrotrend to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectua
11. ded at acquisition card input or AGSC enclosure but not at both places Please do not allow multiple grounding ie at AGSC and at acquisition card unit and at monitoring PC power supply and at Ethernet adapter etc Use opto isolated Ethernet adapters if needed 3 Air Gap Signal Conditioner unit will tolerate aprox 0 2 Tesla of stray magnetic fields If stronger fields are present use aditional protection box made from ferromagnetic material or move to other location 20 23 MIKROTREND AGS Installation and user manual 141129 6 Ordering information AGS Air Gap Sensor is delivered as factory calibrated sets containing P N AGSP sensor probe with integrated preamplifier and connection cable P N AGSC signal conditioner When ordering AGSP sensor probe please use the following format OSP a Lin measuring dad p pe J 13 e5 25 5 50 51 Installation Lagan Deep in the gap mount Edge mount 3 Operating temperature 0 125 C 19500 20 140 C 140 When ordering AGSC signal conditioner please use the following format AGSC Lin measuring range mm 0 8 4 4 Lt IE 150 2 6 13 13 Since 25 10 50 50 5 50 51 Output signal 0 20mA 0 4 20mA 4 Enclosure type With cable inlet CAB o With connectors CON 21 23 MIKROTREND AGS Installation and user manual 141129 7 Manufacturers Test and Calibration Report Air Gap Sensors are individualy calibrated and Man
12. gram 141119 jpg Triaxial cable Figure 16 AGS Wiring diagram before S N 144701 Multicore shielded AGSC Air Gap Signal Conditioner cable BOO Output Input 24VDC Pole profile 0 15A Preamplifier Optional 5000Ohm resistor for conversion from 0 20mA to 0 10V or 4 20mA to 2 10V Shall be at the end of line acquisition card for lowest noise level DO NOT PAINT AGS Wiring diagram 141121 jpg Triaxial cable Figure 16b AGS Wiring diagram after S N 144701 19 23 MIKROTREND AGS Installation and user manual 141129 lout MA Vout V at 500 Ohm lout MA Vout V at 500 Ohm o 0 ae en rrr O S A G 2 Table 2 AGS 25 0 20mA 0 8mA mm Output example Table 3 AGS 25 4 20mA 0 64mA mm Output example 5 Troubleshooting 1 Q Output signal drift with change of temperature humidity A For units before S N 144701 Altough Air Gap Sensor Probe AGSP is not temperature sensitive Air Gap Signal Conditioner AGSC contains humidity sensitive components which can cause significant output signal drift if humidity enters AGSC enclosure Each AGSC unit shall contain a fresh desiccant pack Please keep desiccant in tightly sealed zip bag during installation or better replace desiccant every time AGSC enclosure is opened Every attempt to adjust OFFSET shall be made only after fresh pack of dessicant has been installed for at least 12 hours in order to dry out inside of AGS
13. imeter 7 5 12 meters and 12 to 16 sensorsr for larger diameters 13 23 MIKROTREND AGS Installation and user manual 141129 For vertical machines place the sensors on the upper side of the stator as it will have higher excentricity than the lower side For stator height of more than 1 8 meters Air Gap sensors should be placed on the lower side also Sensor shall be glued against stator laminations as deep as practical in the air gap or at stator edge if EDGE type of sensor probe is to be used In general this is beneath the second ventilation hole The preamplifier small cylinder shape integrated within the cable must stay outside of the air gap and outside of the endwindings if possible outside of the stator casing stator Air Gap Sensors Rotor Air Gap Sensors Figure 11 Air Gap Sensor probe positions 4 8 Preparing the stator surface WARNING CAUTION Thoroughly clean the stator surface use allowed cleaning liquid such as isopropanol alcohol disposable cotton rags and fine non metallic sandpaper DO NOT USE ACETONE OR OTHER SOLVENTS Use a clean rag moistened with isopropanol over the stator surface to remove oil and carbon deposits Epoxy coated or painted stator laminations inspect for mechanical stability If necessary polish the surface and or remove unstable particles with non metallic sandpaper Sensor s bottom surface shall be insulated from stator iron Sensor bottom surface is coated with insul
14. l property of the third party or a license from Mikrotrend under the patents or other intellectual property of Mikrotrend Reproduction of information in Mikrotrend data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice Mikrotrend is not responsible or liable for such altered documentation Resale of Mikrotrend products or services with statements different from or beyond the parameters stated by Mikrotrend for that product or service voids all express and any implied warranties for the associated Mikrotrend product or service and is an unfair and deceptive business practice Mikrotrend is not responsible or liable for any such statements MIKROTREND d o o 4 Bizek 14 10090 ZAGREB CROATIA EU Tel 385 98 504838 385 1 3473106 e mail info at mikrotrend com www mikrotrend com 23 23
15. metod True air gap is sum of measured and offset value Offset compensation shall be made at the monitoring system and displayed value will be True air gap distance Before attempting new offset adjustement let AGSC Signal conditioner unit be powered for 20 30 minutes Slowly turn trimmer potentiometer labeled Offset adj untill reaching required output current or voltage Normally very small rotation will provide large changes on output DO NOT adjust other trimmer potentiometers factory adjustment only Sensor surface N Offset distance Stator surface Figure 14 AGS Offset distance Factory adj A Factory adj B Power supply 24VDC 0 15A O Factory adj C Input Output AGS 141129 jpg Figure 15 AGSC signal conditioner cable inlet enclosure adjustments before S N 144701 17 23 MIKROTREND AGS Installation and user manual 141129 DO NOT OPEN NO USER SERVICABLE PARTS INSIDE HUMIDITY SENSITIVE CIRCUITS OFFSET ADJ Air Gap Sensor AGS 25 seal after O Uout lout pole profile Output signal 0 20mA adjustment w 3 7 s v 3 ho m Signal output 0 20mA Calibrated Non calib 2 Power input Ks GND Shield Ky Si White Os Green 2 12V Brown Ql legs S a 24VDC 0 15 A 25 mm Use optional 5000hm resistor for conversion from current output 0 20mA to voltage output 0 10V For the lowest noise level place resi
16. nclosure with cable inlets CAB mounting dimensions 12 23 MIKROTREND AGS Installation and user manual 141129 4 2 Appropriate location for AGSC Signal Conditioner unit NOTE Distance up to 10 meters from the sensor probe longer distance is possible please enquire up to 200 meters from acquisition unit with 0 20mA loop If voltage output is used interference free distance may vary depending on type of wiring and nearby equipment which my generate electromagnetic disturbance Prefer well ventilated dry area free of vibrations and stray magnetic fields Ensure adequate grounding for enclosure with minimum lenght of wire Ensure access to 24 VDC 0 15A power supply When using enclosure with connectors auxiliary enclosure with door and hinge is mandatory to shield AGSC signal conditioner wires from environmental influences for EMC protection etc 4 3 Grounding of AGSC Signal Conditioner unit CAUTION WARNING Grounding is essential for system operation integrity as well as for protection against hazardous voltages For best grounding provide the shortest path possible between the AGSC signal conditioner unit and the grounded structure Use flexible steel conduit to protect all cables from electromagnetic fields except inside of stator winding where PVC conduit shall be used Keep ample distance from nearby power lines see Figure 15b MULTICORE CABLE SHIELD SHALL BE GROUNDED AT ACQUISITION CARD INPUT
17. nnennnennnnnnunnn 20 6 Ordering information an rnnnnnnnnnnnnnnnnnennnnnnnnnnnnnennnnnnnnennnnenen 21 7 Manufacturers Test and Calibration Report 0 22 Be IMPONSN NONE en 23 2 23 MIKROTREND AGS Installation and user manual 141129 THIS INSTRUCTION MANUAL SHOULD BE READ CAREFULLY AND THE SAFETY INSTRUCTIONS OBSERVED BEFORE INSTALLING CALIBRATING OR USING THE EQUIPMENT DESCRIBED HEREIN Installation and maintenance must be performed by qualified personnel familiar with the construction operation and hazards involved with the equipment Installation and maintenance must be performed with the control out of operation and disconnected from all sources of power Care should be taken when servicing electrostatic sensitive components The manufacturer s recommendations for these components should be followed Ventilation passages should be kept open The means employed for grounding or insulating the equipment from ground should be checked to assure its integrity Care must be taken to avoid damaging any delicate components and to avoid displacing dust dirt or debris in a way that permits it to enter or settle into parts of the control equipment Enclosures should be inspected for evidence of deterioration Accumulated dust and dirt should be removed from the top of the enclosures before opening doors or removing covers 1 Overview Air Gap Sensor AGS is high accuracy non conta
18. ole profile Output signal 4 20mA Uout lout V mA 10 20 Uout lout V mA 10 20 Pole profile Output signal 0 20mA Calibrated Calibrated Non calib at Non calib 3 6 7 2 2 4 2 4 0 0 2 6 13 mm 0 0 2 6 13 mm Figure 7a AGS 13 output signal diagrams ee p 4 3mm x 1 8m 207 2 DO NOT PAINT D AGSC 25 Preamplifier Air Gap Signal Conditioner GA Multicore shielded cable nn ll 3 5mm x 10m Ground wire 6 AGS 25 Outline drawing 141119 Figure 8 AGS 25 outline drawing Air Gap Sensor AGS 25 Air Gap Sensor AGS 25 Pole profile Output signal 4 20mA Uout lout V mA 10 20 Uout lout V mA 10 20 Pole profile Output signal 0 20mA Calibrated Calibrated Non calib at Non calib 36 72 I 2 4 2 4 I I I I 0 0 5 25 mm 0 0 5 25 mm Figure 8a AGS 25 output signal diagrams 9 23 MIKROTREND AGS Installation and user manual 141129 Bl 150 3 DO NOT PAINT p AGSP 50 51 4 dii x 1 8m AGSC 50 51 Preamplifier Air Gap Signal Conditioner 220x12 ARAE Multicore shielded cable o10x mm Il 3 5mm x 10m Ground wire AGS 50 Outline drawing 141119 Figure 9 AGS 50 AGS 51 outline drawing Air Gap Sensor AGS 50 Air Gap Sensor AGS 50 Pole profile Output signal 0 20mA a ie Pole profile Output signal 4 20mA 10 20 Uout lout V mA 10 20 Calibrated Calibrated
19. onal Magnetic flux density withstand 2 Tesla Operating temp AGS probe 20 125 C or 20 140 C Operating temp AGS preamp 20 80 C Operating temp AGS conditioner 20 50 C Storage temperature AGS conditioner 20 80 C Power input 24Vdc 10 0 15A max Warm up time approx 20 min Relative humidity 95 non condensing Vibration IEC 68 2 27 5 g peak 10 Hz to 150 Hz Shock CEC 6B 227 15 gpeak tims O O O O OO S O AGSP cable length m 0 8 or 1 8 10 m orn8 10 AGSC sig conditioner dimension mm 220 x 120 x 80 w o cable inlets AGSC sig conditioner protection class IPOS Weight AGSC signal conditioner 1 AGSC signal conditioner at 50 C AGS preamp at 80 C AGS probe at 125 C 2 AGSC signal conditioner at 50 C AGS preamp at 80 C AGS probe at 140 C Voutput V 0 5 10 15 20 25 LLoaNa _ _ _ _ Linear measuring range Air Gap mm Figure 4 AGS 25 Linearity definition Full Scale Deflection FSD 6 23 MIKROTREND AGS Installation and user manual 141129 N Air Gap ag ala Not to scale AGS 4S Inverted edge mounted air gap sensor SONOT BANE All dimensions in milimeter SENSING SURFACE Not to scale 2 7mm x 0 8m AGSC 4S Air Gap Signal Conditioner 2 220x120x80mm ee Multicore shielded cable 10x 0mm 9
20. perature not exceding 80 C If stator laminate coating is strong and stable You can use two component adhesive type LOCTITE MULTIBOND 330 It is quick and simple application but flexibility is not great and above mentioned precautions about surface stability and operating temperature shall be observed When generator is under heavy load and if surface is not stable enough the sensor may come off due to stator core tensions which adhesive cannot compensate Clean the back surface of the sensor with a rag moistened with alcohol Follow manufacturers instructions Curing times will vary with surface temperature 50 of the final strength is reached after 10 30 minutes full strength after approx 5 hours 15 23 AGS Installation and user manual 141129 Figure 12 AGSP sensor probe installed at stator surface AGS sensor pictured on the left magnetic field sensor on the right side Figure 13 AGSP sensor probe installed at rotor pole AGSP sensor pictured next to Magnetic field sensor in the middle of rotor pole 16 23 MIKROTREND AGS Installation and user manual 141129 4 10 True Air Gap and offset NOTE CAUTION The output of the signal conditioner provides the distance value between the sensor surface and rotor pole Offset is the distance between the stator surface and sensor surface including the thickness of the glue Offset glue thickness sensor thickness varies with sensor type and mounting
21. rend i lt a AGS 7 5S Linear measuring Min Max true air 1 7 4 9 2 7 8 7 3 8 14 2 8 3 28 3 13 3 53 3 gap range mm Table 1 Linear measuring distance from the sensor surface vs true air gap other ranges available per request AGS Measuring range diagram 140514 50mm 40 30 linear measuring range 20 10 non linear measuring range dg 2mm Sensor thickness 0 1mm Adhesive Min true air gap 8 3 mm Figure 1 Minimum true air gap vs measuring range 4 23 MIKROTREND AGS Installation and user manual 141129 Figure 1b Image of AGS pole profile output signal zoom of two poles only Figure 2 AGS Pole profile output signal one rotation 3 5 range 30mm Figure 3 Image of AGS output signal polar data 5 23 MIKROTREND AGS Installation and user manual 141129 3 Technical specifications po AGS HAS AGS 755 AGS 13 AGS 25 AGS 50 AGS 51 from sensor surface from sensor surface pe H i 1 5 Linearity FSD 20 50 80 125 C 1 3 Linearity FSD 20 50 80 140 C 2 3 Output noise of FSD 0 5 0 20mA OmA Omm or 4 20mA 4mA 0mm ere pore pel with 500 Ohm termination resistor 0 10V 2 10V opto insulated Sensitivity 0 20mA output S5mA mm 0 4mA mm Sensitivity 0 10V output 0 2V mm Sensitivity 4 20mA output 0 32mA mm Sensitivity 2 10V output 0 16V mm Typical frequency response 0 1000Hz 3dB other bandwidth opti
22. sive surface Using protective gloves or a rag press the sensor firmly against the stator surface Adhesive is pressure sensitive and reacts on the first applied pressure The sensor can be put in use imediatelly after gluing full strenght will be reached after 24 hours B Silicone sealant adhesive non acid neutral high temperature TEMPFLEX Loctite 5145 250 C Our prefered mounting technique with high flexibility and high holding force This is only metod recommended for Wireless Rotor AGS where high G forces are present Standard operation temperatures from 85 250 C short time up to 300 C A must for locations where stator surface coating has low adhesion to stator laminate Silicone adhesive sealant effectively compensates uneven surface tensions during high load periods on generator thus ensuring stable mounting of the sensor With paper adhesive tape mark border area about 5 mm larger on each side than sensor surface Apply Silicone sealant about 1mm thick evenly spread over entire back surface of the sensor Carefuly place sensor within paper covered opening and firmly press until sealant stops comming out Wipe of excess sealant with paper towel until clean and remove adhesive paper border Fix the sensor in position with adhesive tape Power Tape for at least 6 hours Full curing times up to 24 h shorter with higher ambient moisture C Two component glue short curing time LOCTITE MULTIBOND 330 continuous operation tem
23. stor at the end of line acquisition card AGS 141128 jpg Figure 15a AGSC signal conditioner cable inlet enclosure adjustments after S N 144701 4 11 Cable installation WARNING BEWARE OF HIGH VOLTAGES ON THE STATOR BARS 5 22 KV DO NOT ATTACH TRIAXIAL CABLE DIRECTLY TO THE STATOR BARS THE TRIAXIAL CABLE PREAMPLIFIER AND MULTICORE SHIELDED CABLE MUST BE PROTECTED BY A FLEXIBLE OR SEMI RIGID STEEL WITH POLYETHYLENE PVC CONDUIT SEE FIGURE 15B CAUTION The triaxial cable shall not be modified Muticore shielded cable between preamplifier and signal conditioner unit may be shortened if neccesary This will change output readings approx 3 met Please adjust offset accordingly Gently preshape the triaxial cable by hand to get the right form avoid to bend it beyond a right angle with minimum bending radius of 30mm Immobilize the triaxial cable inside the air gap to prevent vibrations and or mechanical displacement hold the triaxial cable temporary with Cyanoacrylate type glue point glued to the stator laminations iron surface applly Silicone sealant along the cable in the air gap up to the exit making a strong permanent bond Flexible polyamid PA 6 conduit length 1 meter ext dia 10 mm int dia 6 5 mm Preamplifier Operating temperature max 115 C 10x70 mm AGSP DO NOT PAINT Adjustable length Ground preamplifier Triaxial cable Flexible metallic conduit length
24. ufacturers Test and Calibration Report MTR included with each unit as per sample below Manufacturer MIKROTREND d o o 4 Bizek 14 10000 Zagreb CROATIA e mail info at mikrotrend com www mikrotrend com Date 07 March 2014 Ambient 26 C Test performed by K Pavlovic Manufacturers Test and Calibration report No 141003 Product name Air Gap Sensor Probe Part No AGSP 51 N 125 Ser No P51 141003 with Product name Air Gap Signal Conditioner Part No AGSC 51 4 CAB Ser No C51 141003 Scope of testing tested and recorded is sensor output at specified distance Distance Output voltage Output voltage 97 ss se 090 iF Vmeasured V 05 Error Vmeasured V Error INT J EA MR mn gt snill re a Np OO a A OO O LJ Distance mm The product and the factory surveillance system meet all applicable requirements as laid down in the relevant Installation and user manual 22 23 MIKROTREND AGS Installation and user manual 141129 8 Important notice Mikrotrend d o o and its subsidiaries reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Mikrotren
Download Pdf Manuals
Related Search