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30
Sep

How to deal with the cooler failure of the main transformer?

1. When the working power supply of bugnaw section I and II of the transformer is lost, the signal of “power failure of # 1 and # 2” will be sent, and the full stop tripping circuit of the cooler of the main transformer will be connected, which shall be reported to the dispatcher immediately and the set of protection will be stopped.

2. When the switching failure of the working power supply of section I and II occurs during the operation of the transformer, the “full stop of the cooler” lights up. At this time, the full stop tripping circuit of the cooler of the main transformer is connected, and the dispatcher shall be immediately reported to stop using this set of protection, and the manual switching shall be carried out quickly. In case of KM1 and KM2 faults, the strong excitation cannot be performed.

3. When any of the cooler circuits of the transformer fails, isolate the failed cooler circuit.