In addition to checking the main windings, iron cores, clamps and other parts after a transformer short-circuit accident, a series of related issues should also be paid attention to in the process:
■ Inspection and testing of windings
■ Measurement of transformer DC resistance
■ Measurement of Transformer Winding Capacitance
■ Inspection behind the hood
■ Inspection of iron cores and clamps
■ Analysis of transformer oil and gas

Matters needing attention in transformer short-circuit fault handling
(1) When replacing the insulating parts, the performance of the insulating parts should be guaranteed
(2) The transformer insulation test should be carried out when the transformer is still oiled for 24 hours
(3) Attention should be paid to the sharp corners of the iron core when it is reassembled
(4) Replace the winding material with strong short-circuit resistance
(5) Drying of transformers
(6) Other matters needing attention
After a short-circuit accident occurs in a transformer, in addition to testing the transformer according to conventional items, the test results of transformer oil, gas in the gas relay, winding DC resistance, winding capacitance, and winding deformation should be used to judge and analyze the nature of the fault, and check The deformation of the winding, the displacement and looseness of the iron core and the clamp, and then determine the treatment plan for the transformer and the preventive measures to be taken. When the winding is seriously deformed due to the short-circuit accident of the transformer and the winding needs to be replaced, attention should be paid to the reassembly of the iron core chip, the drying of all insulating parts, the treatment of the transformer oil and the overall drying of the transformer.