Answer / jyotirmaya

Normally test are done before installation and commissioning
of the transformer. The following test are done;
1. Visual Inspection
2. Insulation Resistance Test
3. Ratio Test
4. Vector Group Test
5. Magnetizing Current Test
6. Core Balance Test
7. Winding Resistance Test

Answer / p m tamhane

Polarity Test also an important before loading

Answer / rajan singh tanwar(j.k. cement

For Power
Transformers the
following Pre
Commisioning tests
are done:-

1.Visual Inspection
2.Measurement of IR
Value
3.Measurement of P
I Value
4.Measurement of
Winding
Resistance
5.Short Circuit Test
6.Oprn Circuit Test
7.Magnetic Core
balance Test
8.Voltage Radio Test
9.Oil BDV & Acidity
Test
10.Checking the
function of
OTI, WTI, OSR, MOG,
PRV
Relays
Last one for the
relay's testing but
it also comes under
transformer testing.

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