Yes, the open (trip) time is less than 20ms. Thats qualified as per our acceptance criteria. But The close time is a bit higher than the range. Any IEC standard mentioning GIS breakers time testing range?
Guys, need help regarding open close time testing of 500kv GIS breaker. The close time of all three phases were about 66.7,67.2,67.3ms. But as per vendor specifications. The value of closing time should be around 48~60ms.
I have contacted vendor in this regard but now he is telling that value...