1.what type of oil used in tranformer.
2.oil vesocity.
3.oil gauge.
4.witch time oil filterring & how much temperature
maintaned.
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Answer Posted / k.prakashchandra
1. Mineral oil-commonly called as Tr oil
2. 27CST (max)
3. ?
4.a) BDV is below 30KV for voltage below 72.5 Kv,40Kv for
voltage 72.5-170 Kv and 50Kv for above 170 Kv b)water
content above 20 ppm for above 170 Kv and40 ppm for below
170 Kv c) PI value less than 1.2 Temperature to be
maintained while filtering is 65- 70 C at almost full vacuum
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