Winding thermometer guarantee transformer winding temperature shall not exceed the allowable values

Winding thermometer mainly used to monitor the transformer top oil temperature, generally in the transformer top oil temperature than, the lower the oil temperature is high, therefore, through the use of the winding thermometer monitoring top oil temperature to control the high temperature of the transformer winding. Because the average winding temperature is higher than the oil temperature, usually prescribed upper oil temperature does not allow more than 95 ℃, it will not exceed 105 ℃, the highest temperature winding that is consistent with A level allows the temperature of the insulation.

the maximum permissible standard transformer winding temperature is 105 ℃, while winding also can run more than the temperature, but if not controlled by winding thermometer, continuous operation under this temperature, insulation aging soon, life will be greatly reduced. According to the test, such as winding operating temperature kept at 95 ℃, the service life of 20 years, the temperature is 105 ℃, the service life for seven years, the temperature is 120 ℃, the service life is 2 years.

so, the use fixed number of year of transformer mainly depends on the operating temperature of winding, the winding temperature monitoring of transformer oil temperature at the top, which is to monitor the insulation of the transformer winding temperature, thus ensuring transformer winding temperature does not exceed allowable values, and to ensure that the service life of the transformer must be. Therefore, the importance of the winding thermometer for transformer is self-evident.