We have 50 current and voltage transformers installed since 1997. As there are frequent faults in transmission network, so, in that condition, what routine tests (3-years, 5 years, 10 years, 20 years) are required to confirm healthiness of current and voltage transformers as these transformers are used for energy metering and protection?
We recommend a Tan-delta measurement and/or taking an oil sample for dissolved gas analysis.
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