1. Improper use of leakage circuit breaker causes tripping
Analysis of the cause: The three-pole leakage circuit breaker is used in the three-phase four-wire circuit. Since the normal working current in the neutral line does not pass through the leakage current transformer, it will trip as long as the single-phase load leakage circuit breaker is started.
Solution: The three-phase four-wire circuit must use a four-pole leakage circuit breaker.
2. Tripping caused by grounding of the neutral line on the load side of the leakage circuit breaker
Analysis of the cause: The ground wire of the load side of the leakage circuit breaker is grounded, causing the normal working current to trip to the ground through the grounding point.
Solution: The grounding wire can be connected to the zero line of the leakage circuit breaker power supply.
3. Leakage current and wire-to-ground capacitor current trip
Analysis of the cause: The wire allowance on the load side is laid on the ground for a long time, and there is a large capacitance current to the ground. The load side wire is reduced due to insulation, and the earth leakage current increases.
Solution: Select an earth leakage circuit breaker with a slightly larger operating current.
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