After the protection device of the capacitor trips, the cause of the fault should be judged according to the action situation. Before the cause is identified and the fault is eliminated, the capacitor capacitor is not allowed to be powered.
In order to ensure safety, first check the capacitor switch, current transformer, power cable and wiring for defects, and whether each capacitor has abnormalities such as heat generation, fuel injection, casing bulge and sleeve discharge.
If defects or abnormalities are found, replace the capacitors immediately or take corresponding measures. After returning to normal, test the power.
If no abnormality is observed, it may be caused by an external fault that causes the bus voltage to fluctuate and the protection device trips. After the verification, the test can be sent.
If the protective device trips again, the protective device should be fully electrical tested and the current transformer tested for characteristics.
If you still can't find the cause of the fault, you need to disassemble the capacitor bank and test it one by one until you find out the cause.
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