Overload operation of distribution transformer Overload operation of the transformer means that the load current exceeds the rated current of the transformer. Under normal circumstances, when a transformer is operating at a small load, its insulating material cannot fully function. During continuous overload operation, the transformer will generate high temperatures, which will cause the insulation part of the winding to be burned and fall off, forming an inter-turn short circuit; at the same time, the transformer oil will produce Sludge accumulates on the tank plate, windings and core, causing poor heat dissipation of the transformer oil. This vicious cycle not only seriously affects the life of the transformer, but also causes accidents such as high-voltage breakdown and transformer burnout. Therefore, the three-phase load current should be observed frequently. The three-phase load current should be consistent. If there is any deviation, it should not exceed 10%.

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