What can be done in the field to eliminate testing issues / abnormalities?

  • Disconnect the overhead cable / bus from all bushings
  • Clean and dry porcelain
  • Insure test tap / voltage tap is clean and dry
  • Do not test bushing in a crate
  • Only open the tap cover for the bushing that is being tested
  • Ensure that the flange of the busing being tested is DIRECTLY grounded rather than through other device such as a jump switch.
  • Insure test setup is correct 
If testing H1, make sure all low side bushings are connected together & grounded. Insure all HV bushings including neutral are connected together. Contact PCORE for additional assistance with testing. 

Feedback and Knowledge Base