Method for making earth leakage protection without action dead region and breaker thereof

Abstract

The invention relates to an ignore blind area earth leakage protective method and the circuit breaker. The circuit breaker comprises a casing, a power supply circuit, an electrical detection circuit, a control circuit and an electrical wiring board of actuator, wherein the power supply circuit is provided with a expend full wave bridge circuit with rectification branch circuit of PE input earth connection, the electrical detection circuit is provided with an zero-sequence current transformer with the secondary coin and an LED insulation condition indicator light, the control signal output foot of IC control chip of the control circuit is provided with the method of selective switch in the operation mode in order that the control circuit has normal operation electric voltage in any case, the drive operation execution device can apply the protective function of tripping operation and cutting power when the abnormal condition happens on the phase line or the center lines. The area earth leakage protective circuit breaker has real coverage earth leakage protective function, which has strong practicability.

Description

technical field [0001] The invention relates to the technical field of electrical protection, in particular to a method and a circuit breaker for making the leakage protection function cover the whole range without action dead zone. Background technique [0002] At present, the commonly used single-phase leakage protectors can only operate correctly when there is voltage at the input terminal. Once the neutral line (commonly known as the neutral line) in the power supply line is disconnected, electric shock accidents and artificial stealing of electricity will occur on the load side. When the "one line, one place" is used illegally, the automatic tripping function will be lost. This is actually the most dangerous period, because the phase line (live line) is electrically connected to the load through the circuit breaker, and objectively it is easy to cause harm to people. The illusion that the power supply line has been cut off, so it is easy to cause electric shock accident...

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used single-phase leakage protectors can only operate correctly when there is voltage at the input terminal. Once the neutral line (commonly known as the neutral line) in the power supply line is disconnected, electric shock accidents and artificial stealing of electricity will occur on the load side. When the "one line, one place" is used illegally, the automatic tripping function will be lost. This is actually the most dangerous period, because the phase line (live line) is electrically connected to the load through the circuit breaker, and objectively it is easy to cause harm to people. The illusion that the power supply line has been cut off, so it is easy to cause electric shock accidents or accidental fire accidents. Therefore, the protection function of the single-phase leakage protector of the prior art cannot cover the whole range, and there is a certain working dead zone. Therefore, from the perspective of safety , practicability and economical point of view, not ideal

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