Leakage protection circuit with leakage protection in circuit breaker

A leakage protection and circuit breaker technology, applied in emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc. The effect of tripping current, simplifying design, and shortening tripping time

Inactive Publication Date: 2016-05-04
SUZHOU SHIYUN ROBOT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional leakage protection circuit does not have a forced tripping circuit. In practical applications, when a circuit breaker with this leakage protection circuit is used, the design of the application circuit is more complicated. When a certain electrical parameter reaches a certain value, it needs to be turned off. When the power supply is used, it is necessary to configure a special shutdown circuit; in addition, the shutdown time of the circuit breaker is relatively long, usually between 6 and 20 milliseconds

Method used

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  • Leakage protection circuit with leakage protection in circuit breaker
  • Leakage protection circuit with leakage protection in circuit breaker

Examples

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Embodiment Construction

[0015] The following structural drawings describe in detail the specific implementation of the leakage protection circuit of the present invention with a three-phase circuit breaker with leakage protection:

[0016] like figure 1 As shown, the leakage protection circuit in a circuit breaker with leakage protection according to the present invention has a structure comprising: a three-phase rectifier circuit, a leakage current transformer, a special chip for the leakage protector (such as figure 1 The leakage protection control circuit composed of the control chip of the model VG54123A) and its peripheral circuit, the tripping coil for driving the ferromagnet of the tripping mechanism in the circuit breaker, the forced tripping circuit, and the controllable electronic switch as a controllable electronic switch SCR Q1 and Q2, and a tripping energy storage circuit for storing energy for the tripping coil, the input terminals of the three-phase rectification circuit are connected ...

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Abstract

The invention discloses a leakage protection circuit with leakage protection in circuit breaker capable of simplifying application circuit design. The leakage protection circuit comprises a rectifying circuit, a leakage current transformer, a leakage protection control circuit, a controllable electronic switch, a trip coil and a forcing trip circuit; two ends of the trip coil are respectively connected to the positive output end of the rectifying circuit and a corresponding switching end of the controllable electronic switch; the other switching end of the controllable electronic switch is connected to the negative output end of the rectifying circuit; the control end of the controllable electronic switch is connected to the output end of the leakage protection control circuit; the output ends of the leakage current transformer are respectively connected to corresponding ends of the leakage protection control circuit; the power supply end and the ground end of the forcing trip circuit are respectively connected to the power supply end and the ground end of the leakage protection control circuit; the noise suppression end and the output end of the forcing trip circuit are respectively connected to the noise suppression end and the output end of the leakage protection control circuit. According to the leakage protection circuit, the design of the application circuit can be greatly simplified.

Description

technical field [0001] The invention relates to a leakage protection circuit, in particular to a leakage protection circuit in a circuit breaker with leakage protection. Background technique [0002] At present, the structure of the leakage protection circuit in the traditional circuit breaker with leakage protection includes: a rectifier circuit, a leakage current transformer, a leakage protection control circuit composed of a leakage protection dedicated chip and its peripheral circuits, a tripping coil and a controllable Silicon, the input end of the rectification circuit is connected to the corresponding output end of the circuit breaker in one-to-one correspondence, the positive output end of the rectification circuit is connected to the input end of the tripping coil, the negative output end of the rectification circuit is connected to the leakage protection special chip The ground terminal is connected, the output terminal of the tripping coil is connected with the an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/32H02H3/34
CPCH02H3/32H02H3/34
Inventor 林永才王俊涛
Owner SUZHOU SHIYUN ROBOT
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