Recent content by protocolo

You could take the moisture copling a intermdiate filter like a device to capture the water between the transformer compartment and vacuum pump.

I don´t advice that you could make process vacuum only to 10 % of active parts(pappers, isolaters), remenber that furanos test is for aging of papper, you need to makea good process vacuum to all active part,after that dew point test finally fill up the oil under vacuum then Power factor test...

Evacuate completely the oil, after that fill up dry N2 100% to 0,5 bar , after 24 hour carry out DEW POINT TEST.

Each manufacter has his own spewcification, upon Circuit Breakers , GIS and insulated equipments must be carried out HV test on site.for example for a equipment of 145 KV be aplied 235 KV x 1min partial discharge measurements-> o,5 pc but IEC could accept some peaks until 10 PC.