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  1. cloonypan

    looking for battery capacitance tester(135VDC,1300ADC)

    Hello, I am looking for industrial battery capacity tester. The total voltage of 120 cells around 135V. Max discharge current will be 1300ADC. Is there any brand of tester might solve my problem? Thank you. regards,
  2. cloonypan

    any NDT method to find heat exchanger tube leakage?

    hello, Fin-tube Heat exchanger internal tube leakage problem was encountered on a large electrical motor. This problem is not easily found exact leakage position when lots of half inch tubes inside the exchanger especially tiny leakage. We use a water pump to check every tube to see if water...
  3. cloonypan

    load bank for testing 5000 kVA generator

    This is a 13.8kv 5MVA DG connected a with a MV bus of a newly built power plant. Our goal is to exam the AVR performance, bearing lubricant system and cooling system during generator full or no load. Consecutively Starting generator at full load, voltage droop..etc. Thank you.
  4. cloonypan

    load bank for testing 5000 kVA generator

    Hello, I'd like to test 5000 kVA generator performace by connecting a load bank. Any one ever purchase it and testing a emergency diesel generator? How much budget I shall prepare for one load bank? Thank you.
  5. cloonypan

    recommand silver plated thickness of bus-bar

    Many many thanks to Mr. DRWeig!!
  6. cloonypan

    recommand silver plated thickness of bus-bar

    Hello, We are going to coat silver on a bus-bar inter-connection surface for better conduction. Is there any guidances or standards states that how thickness of silver coating layer should be? Thank you. regards,
  7. cloonypan

    ground wire protective coating

    Hello, Please refer the attached pics. I am looking for a transparent coating material to preventing the ground wire rusting as attached. If possible, is there any recommended? Thank you. http://files.engineering.com/getfile.aspx?folder=46e47713-e736-45dc-b2aa-2de4f8ae20fe&file=DSC00341.JPG...
  8. cloonypan

    how to power capacitor bank?

    Hello, I have to capacitor bank which is inside a medium voltage VVVF equipment for maintainence job. This bank is seris connected with three 4700uF capacitors. Anyone could tell me what kind of meter is capable to check caps' volume? How about multimeter? Is capacitor meter better than...
  9. cloonypan

    Please help identify surge absorbe's manufacture

    Hello Skogsgurra, By your suggestion, this component could be found in Epcos company. Thanks for your help.
  10. cloonypan

    Please help identify surge absorbe's manufacture

    Hello, Please see attached surge absorber which is conneced with a relay coil. I want to buy some for spare part. Does anyone know which brand is it? Thank you. http://files.engineering.com/getfile.aspx?folder=5157a35d-19ef-4f90-a53f-f22906211682&file=DSCN1763.JPG
  11. cloonypan

    help indentify insulator manufacture

    sorry pleae see pics below... http://files.engineering.com/getfile.aspx?folder=1aa6920e-6d64-46dd-971d-9049ecb5bf94&file=DSCN1675.JPG http://files.engineering.com/getfile.aspx?folder=e09a7291-6983-457b-918a-85407c7f06c4&file=DSCN1650.JPG...
  12. cloonypan

    help indentify insulator manufacture

    Hello, The attached picture is a medium voltage ceramic insulator with a manufacture's mark on it. Do any one know this manufacture? Thank you.
  13. cloonypan

    any recommended Tangent-delta tester?

    Hello, I am working for a power plant electrical division. Recently insulation of a 5kV cable was failed, about two hundred kilo-ohm. Some expert said that we should try to use Tan-delta tester to diagnose other medium voltage cables. Therefore I would like to ask did any one ever use friendly...
  14. cloonypan

    screw/bolt material & torque

    Hello, I am the original poster. a electrical engineer. My question is a about a electrical power cable terminal to be tighten on flat-shaped copper bus of a electrical panel. Per the panel install instructions, the M12 bolt tighten torque should be 44.1 Nm. However refer to other information on...
  15. cloonypan

    screw/bolt material & torque

    Hello, I have a bolt as which need to be confirmed tighten torque. The said bolt picture is as enclosed. I need some help. Thank you. http://files.engineering.com/getfile.aspx?folder=38f95d14-69c2-4ca0-a21b-7de4034510d8&file=DSCN0933.JPG
  16. cloonypan

    how to check capacitors on old PCB boards

    Hi Mike, I think I was stuck in this question. Thanks for your solution. That's easier and cheaper.
  17. cloonypan

    how to check capacitors on old PCB boards

    Hello, The caps on PCB boards has already stored in warehouse orver five years. I am worried their capacitance still ok good or not. Therefore I would like to check their performances before those boards join into operation. I may provide some field pictures later.
  18. cloonypan

    how to check capacitors on old PCB boards

    Hello, We need to check aged electrolytic capacitors on PCB boards to see if capacitances still available or not. Per some manuals of component testers, the methods to take actual characteristics of capacitors the capacitors should taken off from boards. Taking them off from boards troubles me...
  19. cloonypan

    how to choose a osciloscope to check GTO trigger wave form.

    Thanks for Mr. Skogsgurra's. I think our inverter GTO driver is a typical design. The GTO triggering signals were isolated by optical fiber, optocoupler and IR emitters. Since that, not only GTO signals had to be checked by oscilloscope but also the optical emitting peak power had to be checked...
  20. cloonypan

    optical fiber peak power value detect instrument?

    Hi Scotty, I found some types of Newport optical instrument has the desired funtion. Thank you.

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