Category Archives for High Voltage Testing
CT Primary Injection Ratio Testing Problems
Situation after CT Primary Injection: New 230kv breaker Testing CT’s, 4000/5, by high current injection injecting 80 amps A phase to ground the secondary leads are shorted in a junction box A-B-C-N
Continue readingUnderstanding Transformer Vector Groups
Transformer vector groups can be a difficult concept to understand. I was lucky because the transformer ratio test-set I used for the first couple of years in my career allowed me to make three-phase connections,
Continue readingPotential Transformer Testing (PT/VT)
I co-wrote an article for the NETA World magazine in 2004/2005 that covers several different manual techniques for potential transformer testing that explains several low-tech solutions for potential transformer
Continue readingCurrent Transformer Testing (CT)
I wrote an article for the NETA World magazine in 2004 that covers several different manual techniques for Current Transformer Testing that should help even the most experienced technicians. Here’s
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