Winding thermometer use matters needing attention

In ensuring safe and reliable operation of the large and medium-sized power transformer, extend the life of the transformer winding thermometer plays an important role. Due to winding thermometer is adopting thermal simulation technology of hot point temperature monitoring of the power transformer coil, so the rise of temperature of the electric heating element properties conform to the ideal temperature characteristic is one of the key factors which affect measurement accuracy of the instrument. Transformer winding heat is produced by the load loss in the transformer, the load loss is the heat and is proportional to the square of the current transformer winding. In the use of winding temperature time should pay attention to the following matters: ( 1) Fine-tuning potentiometer w in the thermometer to ensure that production assembly 3 foot welding. One thousand trimmer potentiometer moving contact, when open two fixed foot form fixed resistance and shunt effect, to slow down the impact of the moving contact open. ( 2) Beside the trimmer potentiometer w 1 in parallel to cast off the fixed resistor, before fine-tuning potentiometer w series a fixed resistance, in order to reduce the trimmer potentiometer w adjust quantity, mitigating the effects of moving contact open. ( 3) After school table, restore the bulb on the transformer, be sure to inject a certain amount of transformer oil will insert the L, to prevent the package insert temperature, oil spill, put the bulb on the cover, at the same time to put the nut tightening, better sealing heads, prevent the rain, will restore the table cover at the same time table cover nut and tighten, table cover sealing ring seal, prevent rain water from entering the cause short circuit and burn out electrical circuits.