What is a PCORE POC bushing?

A POC bushing is a Paper-Oil-Capacitor type bushing. A capacitance graded core is wound around a center conductor which is created with high dielectric paper and conductive layers. This bushing core is impregnated with dried, degassed oil. A POC bushing utilizes an upper and lower porcelain insulator for external insulation. POC bushings are available starting at 25kV 400/1200 Amps through 500kV 2000 Amps. The C1 power factor reading for a POC bushing should be 0.5% or below per the IEEE bushing standard. 

Bushings

  1. Where is PCORE Electric, Inc. located?
  2. How long has PCORE been manufacturing bushings?
  3. Is PCORE Electric an ISO Certified Company?
  4. What is PCORE’s product offering?
  5. What standards does PCORE manufacture it’s bushings to?
  6. What is a PCORE POC bushing?
  7. What is a PCORE PRC bushing?
  8. What is an Oil Free PRC bushing?
  9. What is a PCORE Quick Link bushing?
  10. What is a PCORE Test Terminal?
  11. What different designs of the test terminal are available?
  12. What are the current limits for draw-lead connected bushings?
  13. What elevation are PCORE bushings rated for?
  14. Are PCORE bushings Transformer / Breaker Interchangeable (TBI)?
  15. Are PCORE bushings seismically rated?
  16. Does PCORE supply the gasket / o-ring for use between the bushing & equipment?
  17. What are benefits of PCORE’s bushing technologies?
  18. What tests does PCORE recommend be performed on a bushing in the field?
  19. How often should PCORE bushings be tested?
  20. What are the average power factor limits on PRC & POC bushings?
  21. Should power factor correction factors be used with PCORE bushings?
  22. When should you be concerned with power factor and capacitance test results of a PCORE bushing?
  23. What should the oil level be in the sight glass of a PCORE bushing?
  24. What can be done in the field to eliminate testing issues / abnormalities?
  25. What are the recommended testing modes?
  26. What information do I need to provide when replacing a bushing?
  27. What bushings are candidates for repair?
  28. What is the PCB level that is acceptable to ship a bushing to PCORE?
  29. How should a PRC bushing be stored?
  30. How should a low voltage (15kV – 69kV) POC bushings be stored?
  31. How should a high voltage (115kV-230kV) POC bushings be stored?
  32. How should an EHV (345kV -500KV) POC bushings be stored?

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