TRANSFORMER OIL TEST

time：2023-03-08

TRANSFORMER OIL TEST

ü Di-electric Test or Break Down Voltage Test

ü Viscosity Test

ü Acidity Test

Break Down Voltage Test

International standard

ü 2.5 mm gap between two electrodes, Applied voltage 25 KV for 1 min.

· 2.5 mm-25 KV-1 min: No Spark at oil, Oil is ok, Oil can be used at any voltage

level.

· Energy Pac follows this standard.

ü 4.0 mm gap between two electrodes, Applied voltage 45 KV for 1 min.

Acidity test

Acidity Level:

0.5 mg KOH/gm (Oil is ok.)

0.5 to 1.0 mg KOH/gm (Under observation)

1.0 mg KOH/mg (Discard Oil)

Viscosity Test

ü Viscosity of the oil increases as the oxidation reaction increases.

ü Oxidation increases as the dissolved gas of the oil increases.

ü By Dissolved Gas Analysis, the dissolved gas in the oil can be identified.

ü As the viscosity increases the oil turns bulky and it moves slowly and its insulation

capabilities gradually deteriorates.

ü Viscosity should be as low as possible.

Insulation Resistance Test

ü Japanese Standard: (Rated Voltage*2+1) KV dc is applied.