The working principle of transformer winding thermometer1

Winding thermometer as an operation monitoring device has been more and more widely used in transformer products, contribute transformer operation safety, the use of transformer have some help. System set of thermometer is the use of 'principle of the thermal simulation' indirect measurement system set of hot spot temperature, the main group into parts: bulb, corrugated pipe and connecting the two capillary, reflect the transformer top oil temperature measurement system; Current transformer, current verifier and electric heating element.

winding thermometer mainly on the basis of an oil temperature table, equipped with a current verifier and an electric heating element, through out transformer current transformer is proportional to the load current, was adjusted by converter, through the embedded within the elastic component of electric heating element, heat electric heating element, the displacement in the elastic element increase. Therefore, after the transformer on load, displacement of elastic element is mild transformer by the transformer top oil jointly decided by both load current, the temperature of the transformer winding thermometer indicator is the transformer top oil temperature and coil to the sum of the rise of temperature of the oil.