Power transformers mainly include

A. Moisture Absorber (silica gel cylinder): it is filled with silica gel, and the insulating oil in the oil conservator (oil conservator) communicates with the atmosphere through the moisture absorber. The desiccant absorbs moisture and impurities in the air to keep the winding inside the transformer in good condition. insulation properties.
B. Oil level gauge: reflects the oil level of the transformer. In winter, when the temperature is low and the load is light, the oil level does not change much, or the oil level drops slightly; in summer, when the load is heavy, the oil temperature rises, and the oil level also rises slightly; Both are normal.
C. Oil pillow: adjust the oil volume of the oil tank to prevent the transformer oil from over-speed oxidation, and there is an oil filling hole in the upper part.
D. Explosion-proof pipe: prevent sudden accidents from causing explosion hazards due to pressure build-up in the fuel tank.
E. Signal thermometer: monitor the operating temperature of the transformer and send out a signal. Indicates the upper oil temperature of the transformer, and the transformer coil temperature is 10°C higher than the upper oil temperature. The national standard stipulates that the limit operating temperature of the transformer winding is 105°C;
F. Tap Changer: Change the voltage ratio by changing the tap of the high-voltage winding and increasing or reducing the number of winding turns. Generally, the transformer is no-load voltage regulation, and it needs to be powered off:

G. Gas signal relay: (Gas Relay) light gas and heavy gas signal protection. Generally, the gas relay is full of oil, indicating that there is no gas. When there is gas in the fuel tank, it will enter the gas relay. When it reaches a certain level, the gas will squeeze out the oil storage to make the contacts move; open the outer cover of the gas relay, and there are two adjustment rods on the top. Open one of the caps to release the gas in the relay; the other adjustment lever is the protective action test button; when operating with electricity, you must wear insulating gloves and emphasize safety.