Debugging Of Dry-type Transformer Before Operation

(1) Check the transformation ratio and connection group of Dry Type Transformer, measure the DC resistance of high and low voltage windings, and compare the results with the factory test data provided by the manufacturer.

(2) Check the insulation resistance between coils and between coils and ground. If the insulation resistance is significantly lower than the factory measurement data of the equipment, it indicates that the transformer is damp. When the insulation resistance is lower than 1000Ω/V (operating voltage), the transformer must be dried.

(3) The test voltage of the withstand voltage test should comply with the regulations. When performing the low voltage withstand voltage test, the temperature sensor TP100 should be removed. After the test, the sensor should be returned in time.

(4) When the transformer is equipped with a fan, the fan should be powered on and ensure that it operates normally.