The transformer winding temperature is the sum of the top oil temperature of the transformer and the temperature rise of the winding to the oil. The temperature rise of the winding to the oil is determined by the transformer winding current, and the secondary side current of the current transformer is proportional to the winding current.

Working Principle:

The working principle of the winding temperature controller is to take out a current proportional to the load through a current transformer, which is adjusted by the converter, and input it to the electric heating element in the elastic element of the winding temperature controller. The heat generated by the electric heating element causes an additional displacement of the elastic element, thereby generating a temperature indication value that is one temperature difference higher than the oil temperature. The winding temperature controller uses this indirect method to obtain the average indicated value of the winding temperature.

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