What are the inspection and maintenance of dry-type transformers?

29 Jan 2024
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GNEE dry type current transformer

What places do dry-type transformers need to check when leaving the factory?

• Before carrying out the dry-type transformer visual inspection test, it must be ensured that it is powered off and has stopped working. And before the power is connected, the inside of the transformer must be exhausted, drained and cleaned, and the inspection process must be ensured. Through the above inspection and test, the problems existing in the transformer can be found in time, the reliability of the transformer can be improved, and the occurrence of faults can be reduced.


1. Check the appearance of the transformer, including whether the machine casing, welding, connection, paint film, and signs are damaged, peeled off, dirty or deformed.

2. Check whether the transformer insulation materials, including partitions, grids, insulation pads, winding insulation, etc., are intact. If any problem is found, it needs to be replaced or repaired in time.

3. Check whether the wiring, screws, etc. are fastened reliably. If any looseness is found, it should be dealt with in time.

4. Check whether the circuit breaker, relay, thermometer and other equipment are normal. If any problem is found, it needs to be repaired or replaced.

5. Infrared thermometers are often used to test transformers. When serious dust accumulation or local high temperature is found, cleaning measures should be taken in time.

6. Check whether there are alarm lights on the machine, whether the temperature and humidity meter, LCD display and other instruments are working normally, so as to ensure the normal operation of the equipment.

cast coil dry type transformer
indoor dry type transformer

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