why dhyedration test required for transformer oil once in a
year



why dhyedration test required for transformer oil once in a year..

Answer / k.prakashchandra

You mean water content test? Water is likely to enter the
oil through the breather or some leakage.Water content is
not to exceed 20 ppm for voltages below 72.5 KV,10 for
above 170,15 for 72.5 t0 170

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