BWR-04J (TH) Integrated transformer winding thermometer is a transformer instrument. The instrument is designed based on the principle of additional temperature rise. The product has the characteristics of small size, full function, convenient installation and simple operation. And it can output DC (4-20) mA standard current signal for computer system and secondary instrument to realize unmanned power station management.

working principle

 BWR-04J (TH) Integrated transformer winding thermometer is mainly composed of elastic element, sensing tube, temperature sensing component, electric heating element, integrated converter and digital display.

The temperature bulb of the transformer winding thermometer is inserted into the oil hole on the top of the transformer oil tank (. When the transformer load is zero, the reading of the winding thermometer is the temperature of the transformer oil; when the transformer is loaded, the current directly proportional to the load taken out through the transformer current transformer flows through the electric heating element embedded in the bellows after adjustment by the converter; the heat generated by the electric heating element increases the displacement of the elastic element. Therefore, after the transformer is loaded, the displacement of the elastic element is determined by the top layer of the transformer Oil temperature and transformer load current are determined by both; The temperature indicated by the transformer winding thermometer is the sum of the transformer oil temperature and the temperature rise of the coil to the oil, reflecting the temperature of the hot part of the measured transformer coil.

 

 

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DFYLSYC-2023-03-02-A