During the operation of the diesel generator, a trip may occur. So why is there such a problem? Let's look at it below.
1. When the main circuit breaker at the outlet of the diesel generator transformer unit automatically trips, first check whether the generator indicating device has an obvious fault symbol. If there is no abnormal symbol, it indicates that the machine and the furnace are in good condition.
2. Judge the nature and scope of the fault according to the accident phenomenon and relay protection action, and conduct a detailed external inspection of the diesel generator transformer unit and related equipment to determine whether there are external fault characteristics.
3. If the diesel generator bus differential causes generator over-current protection, or the substation fault causes generator over-current protection, please check whether the generator is normal, and after the fault is isolated, contact the network for adjustment and connect to the grid.
4. Before tripping, if there is a strong excitation, there will be a current surge, which reflects the main protection measures (differential, heavy gas, etc.) of the internal fault of the generator transformer unit. The grid is operating normally and should be processed at this time.