The insulating oils in the transformer and breather system are subject to regular monitoring by end-user in accordance with relevant rules and regulation. Monitoring of the OLTC oil -the dielectric strength is the decisive criteria – should be combined with the usual check-up on the transformer oil.

Dielectric Transformer Oil Breakdown 
Tan & Sons services, Oil Testing and Oil Sampling with modern, high quality, and fully automatic laboratory base Oil Test Set which can measure according to IEC, VDE or ANSI standards.