Pre-operation inspection and precautions of Air-cooled Transformer

Air-cooled Transformer's improved engine fuel supply method has been used in many domestic 200MW units in southern my country. What are the pre-operation inspections and precautions for the Air-cooled Transformer?

Here is the content list:

l Pre-operation inspection of Air-cooled Transformer.

l Precautions for the operation of Air-cooled Transformer.

Pre-operation inspection of Air-cooled Transformer.

1. The Air-cooled Transformer is in good condition, and the inspection and maintenance work has been completed.

2. The oil color, oil level, and oil temperature of the oil pillow and casing should be normal without oil leakage or oil leakage.

3. The relay, radiator, and oil regeneration shut-off door should be opened. There is no gas in the relay and the wiring is good.

4. The high and low-pressure casing is intact, the closed bus bar is well connected, and the pressure release valve is intact without cracks.

5. The position of the tap switch is correct, and the adjustment device of the on-load tap changer should be intact and flexible.

6. Test the insulation of all parts of the transformer to be qualified.

7. There are no leftovers on the top and conductive parts of the Air-cooled Transformer.

8. The Air-cooled Transformer shell and iron core grounding wire are good.

9. The power supply of the cooling device is in good condition, and all parts of the cooler are normal and put into operation according to regulations.

10. The protection device action test is correct, and the transformer switch opening and closing test are correct. The relay protection input is correct.

11. The transformer after maintenance should have a written explanation that it can be put into operation.

12. Check whether the instructions of the Air-cooled Transformer body oil temperature gauge and winding temperature gauge are consistent with the actual situation, and check with the value of the control room.

13. The lightning arresters on each side of the Air-cooled Transformer are turned on, and the counter indicates normally. Fire-fighting equipment and safety equipment are in good condition.

14. There are no other factors that threaten the safe operation of the transformer.

Precautions for the operation of Air-cooled Transformer.

When the Air-cooled Transformer is running, the cooler must be put in, and should not be put in too much cooler when there is no load or light load. When the oil in the transformer is stagnant due to low temperature in winter, the cooler should not be used for no-load operation. At the same time, the top oil temperature should be monitored, and the load should be gradually increased until the corresponding number of coolers are put into normal operation. A heating device is installed in the Air-cooled Transformer control box. When the temperature in the control box is lower than the specified value or the humidity is higher than the specified value, the heater starts heating, and when the temperature is higher than the specified value or the humidity is lower than the specified value, the heater stops heating.

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