1. Humidifier (silica gel cylinder): silica gel is filled inside, the insulating oil in the oil storage tank (oil storage tank) is communicated with the atmosphere through the dehumidifier, and the desiccant absorbs moisture and impurities in the air.
2. Oil level meter: It reflects the oil level of transformer, which is generally around +20O. If it is too high, it needs drainage; if it is too low, it needs refueling.
3. Oil storage tank: adjust the oil quantity in the oil tank to prevent the transformer oil from being oxidized at an excessive speed, and the upper part is provided with an oil injection hole.
4. Explosion-proof tube: to prevent pressure accumulation in the oil tank and explosion danger caused by unexpected accidents.
5. Signal thermometer: Monitor the working temperature of the transformer and send a signal. Indicates the upper oil temperature of transformer, and the temperature of transformer coil is higher than the upper oil temperature 10℃.
6. Tap-changer: Change the voltage ratio by changing the tap of the high-voltage winding and increasing or decreasing the number of winding turns.
7. Gas signal relay: (gas relay) Light gas and heavy gas signal protection.
Extended data:
Maintenance of power transformer;
1, oil sample test-performance indicators such as withstand voltage and impurities are conducted once every three years. If the transformer is fully loaded or overloaded for a long time, the cycle can be shortened.
2, high and low voltage insulation resistance is not less than 70% of the original value (10Ω), winding DC resistance at the same temperature, the difference between the three-phase average should not be greater than 2%, compared with the last measurement results should not be greater than 2%.
3. The working grounding resistance of transformer is measured every two years.
4. The cleaning and inspection cycle of power supply is generally once every six months to once a year according to the surrounding environment and load.
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