Power transformer structure

2019-05-11 11:21:06 JuKe Technology (DongGuan) Co., Ltd. Read

Power transformer structure

Power Transformers are mainly composed of the following components:

1. Moisture absorber (silicone tube): Silicone is contained inside. The insulating oil in the oil conservator (oil pillow) communicates with the atmosphere through the moisture absorber. The desiccant absorbs moisture and impurities in the air.

2, oil level meter: reflect the oil level of the transformer, generally around +20O, too high to drain oil, too low to refuel.

3. Oil pillow: adjust the oil volume of the fuel tank to prevent the transformer oil from oxidizing excessively. The upper part has oiling holes.

4. Explosion-proof pipe: Prevent sudden accidents from causing explosion hazard due to pressure accumulation in the fuel tank.

5, signal thermometer: monitor the transformer operating temperature, send a signal. Indicates the upper oil temperature of the transformer, and the transformer coil temperature is 10 °C higher than the upper oil temperature.

6. Tap-changer: Change the voltage ratio by changing the high-voltage winding taps to increase or decrease the number of winding turns.

7, gas signal relay: (gas relay) light gas, heavy gas signal protection.
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Extended information:

Maintenance of power transformers:

1, oil sample test - pressure, impurities and other performance indicators are carried out every three years, the transformer long-term full load or overload operation can shorten the cycle.

2, high and low voltage insulation resistance is not lower than 70% (10MΩ) of the original factory value, the DC resistance of the winding at the same temperature, the difference between the three-phase average should not exceed 2%, compared with the results of the previous measurement Should be greater than 2%.

3. The working grounding resistance of the transformer is measured every two years.

4. The period of power-off cleaning and inspection is determined according to the surrounding environment and load conditions, usually from half a year to once a year.