The large circuit breaker installed at the input end inside the high-power

1. The machine shell is deformed due to impact, the cables connecting the empty circuit inside the machine are damaged, and a short circuit is formed between the charged body inside and the shell, resulting in a leakage current exceeding 30mA.
2. The machine is exposed to moisture and water inside, and the basic insulation between the charged components and the casing is damaged, resulting in a leakage current exceeding 30mA.
The leakage detection of RCD itself is very sensitive, and the leakage current may not exceed the standard, but RCD detects a leakage current exceeding 30mA.
One of the two wires, L and N, is connected in reverse to the PE wire, resulting in a leakage current exceeding 30mA.
5. For communication stations, in addition to the leakage current of the charging station itself, OBC may generate leakage and cause tripping.

7. Connect more loads to the circuit breaker branch, causing overload tripping.
8. The cable diameter of the input line of the circuit breaker is too thin, causing an increase in local contact resistance and heating, resulting in an increase in the temperature of the circuit breaker, a decrease in load capacity, and overload tripping.
9. The machine is damaged, causing L and N to be approximately short circuited inside the machine, resulting in overload tripping.
10. The weak power grid causes input current oscillation, resulting in overload tripping.

11. If the ambient temperature exceeds the working temperature of the circuit breaker, it will trip due to overheating.
12. The cable stripping is not standardized, and the conductive part at the end of the cable has an outer wire skin locked into the air switch. The air switch heats up and trips due to overheating.