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Locking device for leakage breaker

A technology of leakage circuit breaker and locking device, which is applied to circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc. Effect

Inactive Publication Date: 2006-12-06
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing leakage circuit breaker does not have dual protection functions and has potential safety hazards, and aims to provide a locking device for the leakage circuit breaker, which can play an additional protection function

Method used

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  • Locking device for leakage breaker
  • Locking device for leakage breaker
  • Locking device for leakage breaker

Examples

Experimental program
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Embodiment Construction

[0014] Referring to the accompanying drawings, the zero-sequence current transformer 13 has an iron core made of nanocrystalline alloy, and there are two secondary coils, one provides input for leakage protection, and the other provides input for the locking device. The locking device of the leakage circuit breaker includes a control unit and an execution unit. The control unit is composed of an electronic circuit, and the printed circuit board 10 is used as a base for fixing and transmitting signals of electronic components; the connecting wire 15 is used as a channel for electrical signals; the piezoresistor R11 is used to absorb the overvoltage of the line and atmospheric pulse, and prevent the thyristor VT2 from malfunctioning due to overvoltage. Diodes VD5-VD8, capacitor C14, and resistor R10 form a step-down, rectification, and filter circuit to enable the electronic circuit to obtain the required power supply voltage; resistors R6, resistor R7, capacitor C8, capacitor C9...

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PUM

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Abstract

This invention discloses a locking device of a leakage breaker including a control unit composed of a filtering, interference-proof circuit, regulation circuit, differential amplifier, time-delay circuit and switch circuit and executing unit made up of coil, iron core, magnet yoke and pull-rod, the input of the said control unit connects to the secondary coil of the leakage breaker zero-sequence mutual-inductor. When the leakage protection function of the leakage breaker gets lost, the iron core is pick-up to drive the pull-rod to operate with the leakage breaker breaking at setting time.

Description

technical field [0001] The invention relates to an auxiliary device of a leakage circuit breaker, in particular to a locking device of a leakage circuit breaker. Background technique [0002] Existing leakage circuit breakers do not have dual protection functions except their own leakage tripping function. Once the electronic component board or leakage tripper burns out, they cannot protect users. gate, it is easy to cause the line to catch fire and cause a fire hazard. If someone gets an electric shock and the circuit breaker does not open at this time, it will cause an electric shock casualty accident. Contents of the invention [0003] The present invention aims to solve the problem that the existing leakage circuit breaker does not have dual protection functions and has potential safety hazards, and aims to provide a locking device for the leakage circuit breaker, which can play an additional protection function. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/32H02H3/34H01H83/14
Inventor 郑士杰吴爱新李孔斛
Owner ZHEJIANG CHINT ELECTRIC CO LTD