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MIKROTREND AGS Installation And User Manual

Air gap sensor
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MIKROTREND
AGS Installation and user manual 170622
Air Gap Sensor
AGS
Installation and user manual
Valid for serial numbers up to: 172305
1/29

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Summary of Contents for MIKROTREND AGS

  • Page 1 MIKROTREND AGS Installation and user manual 170622 Air Gap Sensor Installation and user manual Valid for serial numbers up to: 172305 1/29...

  • Page 2: Table Of Contents

    1. Overview ................... 5 2. Application................5 2.1. AGS selection table ................. 5 2.2. AGS resolution and output signal samples ........7 3. Technical specifications ............8 4. Installation instructions ............16 4.1. AGSC Signal Conditioner unit installation guide ......16 4.2.

  • Page 3: Safety Recommendations

    Mikrotrend reserves the right to change the features or characteristics of its products at any time. Therefore, the information contained in this publication is subject to change at any time without notice.

  • Page 4: Performance Data

    MIKROTREND AGS Installation and user manual 170622 The conducting of any tests shall be mutually agreed upon and Seller shal be notified of, and may be present at, all tests that may be made. Buyer requested on-site warranty service (consisting of time, travel and expenses related to such services) will be at Buyer’s expense.

  • Page 5: Overview

    Overview - Air Gap Sensor (AGS) is a high accuracy, non contact, capacitive type distance measuring sensor for measuring air-gap in air-cooled generators and electric motors. - A low profile sensor probe with triaxial cable, preamplifier and Conditioner electronics.
  • Page 6 MIKROTREND AGS Installation and user manual 170622 Figure 1. Minimum true air gap vs. measuring range for AGS-51 Figure 2: Image of AGS output signal, polar data 6/29...

  • Page 7: Ags Resolution And Output Signal Samples

    (Figure 3, 4, 5). Figure 3: Image of AGS pole profile output signal, ( two poles view ), arrow showing hoist attachment holles Figure 4: AGS Pole profile output signal (one rotation) arrow showing hoist attachment holles...

  • Page 8: Technical Specifications

    (1) AGSC (signal conditioner) at 80°C, AGSP (preamp.) at 80°C, AGSP (probe) at 125°C (2) AGSC (signal conditioner) at 80°C, AGSP (preamp.) at 80°C, AGSP (probe) at 140°C (3) AGS-13 and AGS-15 sensor probe tickness from S/N: 153601 onward has been changed from 1.2mm to current 2.2mm. ±3%...
  • Page 9 MIKROTREND AGS Installation and user manual 170622 Figure 7. AGS-4S (cable attachment inverted type) outline drawing Figure 8. AGS-4S output signal diagrams 9/29...
  • Page 10 MIKROTREND AGS Installation and user manual 170622 Figure 9. AGS-7,5-N outline drawing Figure 10. AGS-7,5 output signal diagrams 10/29...
  • Page 11 MIKROTREND AGS Installation and user manual 170622 Figure 11. AGS-13-N outline drawing Figure 12. AGS-13 output signal diagrams 11/29...
  • Page 12 MIKROTREND AGS Installation and user manual 170622 Figure 13. AGS-15-N outline drawing before S/N: 153601 Figure 14. AGS-15-N outline drawing after S/N:153601, (changed sensor probe thickness) 12/29...
  • Page 13 MIKROTREND AGS Installation and user manual 170622 Figure 15. AGS-25-N outline drawing Figure 16. AGS-25 output signal diagrams 13/29...
  • Page 14 MIKROTREND AGS Installation and user manual 170622 Figure 17. AGS-50 / AGS-51 outline drawing Figure 18. AGS-50 output signal diagrams Figure 19. AGS-51 output signal diagrams 14/29...
  • Page 15 MIKROTREND AGS Installation and user manual 170622 Figure 20. AGS-65 outline drawing Figure 21. AGS-65 output signal diagrams 15/29...

  • Page 16: Installation Instructions

    MIKROTREND AGS Installation and user manual 170622 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 IP60 cable connectors allow for easy installation without opening enclosure cover.
  • Page 17 Later S/N numbers are fully sealed and does not need desiccant ( Figure 25 ). Figure 24. AGS Signal Conditioner unit enclosure with cable inlets (CAB) (before S/N 144701) Figure 25. AGS Signal Conditioner unit enclosure with cable inlets (CAB) (after S/N 144701) Figure 26.

  • Page 18: Appropriate Location For Agsc Signal Conditioner Unit

    Life time of electronic components and MTBF hours depend on thermal load and ambient temperature. AGS electronics is designed to provide more than 20 years of continuous service if installed properly. As a general rule for every 10°C increase of ambient temperature above maximum specified, components life time will be halved.

  • Page 19: Agsp Sensor Probe Installation Guide

    (4) Stator mounted Air Gap Sensors, upper side and four (4) at lower side. (http://www.mikrotrend.com/wrm-wireless-hydrogenerator-rotor-monitor.htm) If Wireless Rotor AGS is not used than good practical results are achieved with ( Figure 24. ) - 4 sensors for upper and 4 for lower side, generator diameter of less than 7,5 meters, - 8 sensors for upper and 8 for lower side, generator with diameter 7,5…12 meters,...

  • Page 20: Preparing The Stator Surface

    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.
  • Page 21 MIKROTREND AGS Installation and user manual 170622 Figure 29. Air gap sensor probe mounting position diagram Figure 30. AGS Sensor probe mounting position showing triax cable and protective conduit 21/29...
  • Page 22 AGS Installation and user manual 170622 Figure 31. AGSP sensor probe installed at stator surface (AGS sensor pictured on the left, magnetic field sensor on the right side) Figure 32. AGSP sensor probe installed at rotor pole (AGSP sensor pictured next to Magnetic field sensor in the middle of rotor pole)

  • Page 23: True Air-Gap And Offset

    MIKROTREND AGS Installation and user manual 170622 4.11. True Air-Gap and offset 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 metod.

  • Page 24: Cable Installation

    - Hold the triaxial cable temporary with Cyanoacrylate type adhesive, 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 (Figure 30). Figure 36. Air Gap Sensor AGS Shielding and grounding 24/29...

  • Page 25: Connection To Agsc Conditioner Unit

    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 ( for the lowest noise level). Figure 37. AGS Wiring diagram (before S/N 144701) Figure 38. AGS Wiring diagram (after S/N 144701)

  • Page 26: Troubleshooting

    5.3. Q: 50/100Hz and/or higher frequency noise in pole profile signal: 5.3.1. EMC protection with 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 36 ).

  • Page 27: Ordering Information

    MIKROTREND AGS Installation and user manual 170622 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: AGSP Lin.

  • Page 28: Manufacturers Test And Calibration Report

    MIKROTREND AGS Installation and user manual 170622 Manufacturers Test and Calibration Report Air Gap Sensors are individualy calibrated and Manufacturers Test and Calibration report (MTR) included with each unit as per sample below: 28/29...
  • Page 29 Mikrotrend d.o.o. assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, or copyright to these products, and makes no representations or warranties that these products are free from patent or copyright infringement, unless otherwise specified.

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