Instruction for Testing and Maintenance of Transformer and Switchgear Insulating Oil
|Publication Date:||1 June 2017|
Group 1: Transformers (high priority)
e.g. grid transformers, including the selector tanks of on-load tap changers and isolating transformers.
Group 2: Transformers (low priority)
e.g. booster transformers, regulating transformers, auxiliary transformers and rectifier transformers.
Group 3: Switchgear (subdivided into):
Group 3(a): All bulk oil circuit breakers.
Group 3(b): All minimum oil circuit breakers.
Group 3(c): Associated oil filled chambers and voltage reference/instrument