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

A technology of leakage protection and action dead zone, which is applied to emergency protection circuit devices, switches and circuit devices that operate due to overcurrent and other abnormal electrical conditions, and can solve the problem that the protection function of single-phase leakage protectors cannot cover all Range, loss of automatic tripping function, accidental fire accidents and other issues, to achieve the effect of safe electricity use, strong security, and extended protection range

Active Publication Date: 2009-12-30
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and typical embodiments.

[0018] exist figure 1 and figure 2 Among them, the main body of the circuit breaker of the present invention, which makes leakage protection without action dead zone, is composed of an external casing 1 and an internal electrical circuit board 2. The casing 1 is provided with an input terminal 10 for the power phase line Φ and an input connection for the neutral line N. Column 11, phase line Φ output terminal 12 and neutral line N output terminal 13, the internal electrical circuit board 2 includes a power supply circuit 3, an electrical detection circuit 4, a control circuit 5 and an action actuator 6, characterized in that: The housing 1 is also provided with a terminal 14 for inputting the ground wire PE; the power supply circuit 3 includes a power supply phase line Φ, a neutral line N, an input ground wire PE, and is composed of rectifier ...

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Abstract

The invention relates to an ignore blind area earth leakage protective method and the circuit breaker. The circuit breaker comprises a casing, an upper tape 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 an extend full wave bridge circuit with a rectification branch circuit with a 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 a method of selective switch in the operation mode in order to insure 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/14H01H83/20
Inventor 唐屹峰廖铀倪景皓周伟
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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