Wattmeter reading x C.T. ratio
Wattmeter reading x P.T. ratio
Wattmeter reading x C.T. ratio x P.T. ratio
(Wattmeter reading/C.T. ratio) x P.T. ratio
primary winding
secondary winding
low voltage winding
high voltage winding
110 V
220 V
330 V
440 V
1100 V, 50 A
11 kV, 50 A
11 kV, 500 A
110 kV, 500 A
to provide cooling air to the winding
to arrest the flow of moisture into the tank
to control the level of oil in the tank
to filter the transformer oil