1. The current in phase A is too large and phase BC is too small, indicating that phase A is a faulty phase
2 There are reverse current and zero sequence current, indicating that. there is a ground fault
3. The air temperature at the generator output increases, indicating that the point of short circuit to ground is at the generator output.
The result is: phase A ground fault. the generator output.
Then it is necessary to reduce the load, then stop the machine, check the fault status of phase A during power failure and carry out maintenance.
The inspection items of the generator set are as follows:
1) The coil temperature and iron core temperature of the generator cannot exceed the standard
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2. ) The air temperature at the inlet and outlet of the generator cannot exceed the standard Exceeding the standard
3) No spark din the carbon brush slip ring
4) No discharge or spark. inside the generator
5) The excitation current and voltage of the generator must match the primary voltage and current of the generator and cannot exceed the standard.