tan delta
tan delta
(OP)
Hello Engrs
We conducted a tan delta test on a 30MVA, 132/33KV transformer recently using OMICRON CPC 100. At different voltages we had values like -6%, 0.5 % and 23%. What can we deduce from these. Iread that for good insulation the value should be around 0.007%
what does the minus sign imply.
We conducted a tan delta test on a 30MVA, 132/33KV transformer recently using OMICRON CPC 100. At different voltages we had values like -6%, 0.5 % and 23%. What can we deduce from these. Iread that for good insulation the value should be around 0.007%
what does the minus sign imply.






RE: tan delta
Lots of moisture *could* be a reason. But those numbers are all over the place and indicate bad measurement practice. Or faulty equipment.
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: tan delta
RE: tan delta
RE: tan delta