Neutral bushing insulation level for a solidly grounded 400/132/20 kv Ynyn0d11
Neutral bushing insulation level for a solidly grounded 400/132/20 kv Ynyn0d11
(OP)
I would like to know how can I size the insulation level for both primary and secondary neutral bushings of a solidly grounded 400/132/20 KV Ynyn0d11 power transformer.
Regards
Massoud
Regards
Massoud






RE: Neutral bushing insulation level for a solidly grounded 400/132/20 kv Ynyn0d11
RE: Neutral bushing insulation level for a solidly grounded 400/132/20 kv Ynyn0d11
for similar units in terms of nominal voltages (i.e. 400/135 kV autotransformsers), operating in an effectively neutral grounded system, we specify 72.5 kV for neutral bushings. Obviously we are speaking about non-uniformly insulated windings.
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