Maintenance Of Main Transformer Tripping

If the main transformer trips for whatever reason, on the one hand, the load should be transported as soon as possible and the operation method should be changed. On the other hand, what maintenance action is to be found. The submersible pump should be stopped immediately, and the maintenance operation should be checked for abnormal phenomena, whether the main transformer is overloaded when tripping, and whether the transmission and feeder lines are tripped at the same time. In addition to confirming that it is a malfunction and can be closed immediately, the insulation resistance should be measured and judged according to the following conditions deal with:

1. Oil change of power transformer

First lift out the body of the device, put the clean oil and clean the oil tank. If there is oil on the body of the device, it should also be washed. After the body is dry, inject new oil and replace all oil-resistant rubber seals. After the test is qualified, it can be connected to the network and run.

2. Drying treatment of main power transformers

There are many ways to dry the body. When users bake by themselves, zero-phase sequence drying method, eddy current drying method, short-circuit drying method, oven drying method, etc. can be used. For power transformers with larger capacity and voltage of 35 kV, it is best to send them to the manufacturer for vacuum drying. In this way, it can not only ensure that the insulation of the power transformer is completely dry, but also not make the insulation aging.