(1)When my equipment does have leakage when the switch box leakage insurance and secondary box leakage insurance and the first level of the box leakage insurance why will be jumped together, "the swit

(1)When my equipment does have leakage when the switch box leakage insurance and secondary box leakage insurance and the first level of the box leakage insurance why will be jumped together, "the switch box and the secondary box". You this is a typical multi-level leakage protection, leakage protection level there are many, this level is the product of current and time, such as: 6mA * S, 10mA * S, 30mA * S, 100mA * S, 300mA * S, different occasions with different levels of protection, the more the upper level of the lower sensitivity, the more the end of the higher sensitivity, if the leakage of multi-level protection is the same sensitivity, then the tripping is Random, no law, this installation is not scientific, I have read on the Schneider website, the link is not easy to find, he gave an example of two leakage protection, the first level of 300mA * S, the role of a fire, major accidents, such as power outages, the second level of 30mA * S, for the protection of a single device. Another: medical use of a higher level. For industrial control, generally there is no leakage protection for the main gate, at most there are two levels further down, which is the way described above. Not a direct answer to your question, but I hope you understand!