(1) If the transformer is overloaded, the load should be reduced according to the regulations, if there is oil leakage, the oil level is too low or too high, the temperature is too hot, the sound is abnormal, etc., it should be eliminated as soon as possible after the power failure;

(2) If the oil temperature is high, but the oil level is low, the oil should be refueled immediately; because the oil leakage is serious, the oil level drops rapidly, the gas protection is changed to only act on the signal, and measures are taken immediately to block the oil leakage part, and the oil is refueled immediately;

(3) If the oil level gradually rises due to high temperature, or even may be higher than the indicated position, the oil should be drained immediately to reduce it to an appropriate height to prevent the oil from escaping;

(4) When the winding or core fault occurs, the DC resistance between the windings of each phase should be measured for comparison, if the difference is large, it means that the winding fault has occurred. Then check the appearance of the iron core, and then use the ammeter under DC voltage to measure the insulation resistance between the piece and the piece, if the damage is not serious, it can be solved by painting the damaged part.

(5) If there is strong noise during the working process of the transformer, the oil pillow door is damaged, the oil spray smoke appears, the oil color becomes darker, there is carbon in the oil, the bushing is ruptured, and there is a possibility of short circuit, at this time, the use of the transformer should be stopped immediately regardless of whether there is a backup transformer, so as to save time and reduce the probability of danger.