GFI TESTING/CERTIFICATION MAIN BREAKERS WHEN SO EQUIPPED

[Charles Martel]

VERY CURIOUS TO SEE IF THERE ARE INDIVIDUALS WHO CURRENTLY PERFORM OR ARE VERY EXPERIENCED IN TESTING MAIN BREAKERS AND THEIR GFI MODULES.

MU UNDERSTANDING IS THAT INJECTION OF A CURRENT TO 1200A IS MADE ON THE PRIMARY SIDE WITH BREAKER IN PLACE. AND OF COURSE DE-ENERGIZED ON BOTH PRIMARY AND SECONDARY. BUT THE VARIOUS CONFIGURATIONS ELUDE ME. CT WRAP AROUND THREE PHASES AND THEN THERE IS A CT ON NEUTRAL. IN SOME CASES MODULE IS EXTERNAL AND WITH OTHERS IT IS INTERNAL IN THAT SAME CONFIGURATION. IN SOME CASE A SIEMENS WILL HAVE EVERYTHING INTERNAL, CT AND GFI MODULE.

WONDERED IF YOU HAVE NOTES ON WHERE TO CONNECT THE CABLES TO INJECT. I ASSUME ONE IS ON ONE OF THE PHASES AND THE OTEHR IS ON THE NEUTRAL WITH CABEL LOOPING THROUGH ONE OR TWO TIMES AROUND THE CT. NOT SURE WITH MOULDED CASE BREAKERS WHEERE EVERYTHING IS INTERNAL. I BELIEVE IT REQUIRES BREAKING THE BND OF THE NEUTRAL TO THE GROUND OR CASING GROUND BOND.

IS THERE A MANUAL FROM ANYONE ON THIS?

 

[roger]

WHY ARE YOU YELLING AT US?

Roger

 

[zog]

There are many different configurations so would need details to help, most people just call in a testing company as this often requires special test equipment to do properly.

 

[brian john]

20 years ago this would have been a simpler question to answer, and testing main line bolted pressure switches is still pretty basic, testing circuit breakers can be a bit more complicated and there is typical more to testing than just testing at hitting at 1200 amps.

The typical equipment to test GFP on switches and CBs can run from the low of $14,000 (doctor, megger and small high current test set. and up. Plus knowing how to use the equipment.

While I would not deter anyone from learning i would suggest you sub this out.