Overcurrent relay action circuit breaker tripping reason and treatment method

(1) Immediately find out the cause of the fault. If it is an external cause (such as overload, external short circuit, etc.), if there is no internal short circuit phenomenon and discharge burn marks, you should contact the power supply immediately.

(2) After checking to confirm that the line has caused a leap-level trip, the fault circuit can be cut off first, and then the power supply can be quickly contacted.

(3) If the secondary busbar and the transformer outlet lead are short-circuited, the transformer should be carefully inspected and recorded for comprehensive testing. Power can only be sent after the defect has been processed.