CN201226440Y

CN201226440Y - Earth leakage protection circuit breaker

Info

Publication number: CN201226440Y
Application number: CNU2008200499081U
Authority: CN
Inventors: 诸克彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2009-04-22
Anticipated expiration: 2018-06-30

Abstract

The utility model discloses a leakage protective circuit breaker, which comprises an overload overcurrent breaker, a full-bridge redtifier, an LE circuit and an actuating mechanism, a zero sequence current transducer and leakage test buttons. The full-bridge redtifier is in the 360 degrees full-bridge redtifier structure, which is provided with eight rectifier diodes connected with the four powerlines of A, B, C and N. The leakage protective circuit breaker changes the fact that the prior leakage breaker is powered by just one phase of the three-phase four-wire circuit, which is powered by the 360 degrees full-bridge redtifier structure. The full-bridge redtifier powered by one phase of the wire circuit, namely, adopts the power supply proposal of (A+B+C+N). In this way, whichever power supply line of the wire circuit loses voltage; sufficient voltage can be acquired from the grid and is provided for the leakage breaker. In this way, the leakage protective circuit breaker has more reliable leakage protection function, and can protect circuit from leaking more reliably.

Description

Earth leakage circuit breaker

Technical field

The utility model belongs to electronic technology field, relates in particular to a kind of residual current circuit breaker.

Background technology

The residual current circuit breaker of existing three-phase and four-line circuit; usually has the overload flow circuit breaker; bridge rectifier; LE circuit and actuator; zero-sequence transformer; elements such as leak(age) test button; adopt simple single circuit power supply; the power supply that is residual current circuit breaker is wherein one to come power taking mutually by the rectification full-bridge from the three-phase and four-line circuit; when the circuit that power supply is provided for residual current circuit breaker because of certain reason comes in contact somewhere the bad or decompression that opens circuit; all mechanisms that shield in the residual current circuit breaker will all paralyse; just do not play earth leakage protective effect yet; so under this kind condition; residual current circuit breaker has just lost meaning, and earth leakage protective reliability is just not high.

Summary of the invention

The purpose of this utility model provides a kind of earth leakage protective residual current circuit breaker more reliably.

For achieving the above object; the technical solution of the utility model is: a kind of earth leakage circuit breaker; have overload flow circuit breaker, rectification full-bridge, LE circuit and actuator, zero-sequence transformer, leak(age) test button; rectification full-bridge wherein is 360 ° of rectification full bridge structures; it has eight rectifier diodes, is connected in A, B, four power lines of C, N.

360 ° of rectification full-bridges independently are provided with.

360 ° of rectification full-bridges are arranged on the circuit board of LE circuit.

The beneficial effects of the utility model are; it has changed an existing residual current circuit breaker wherein state of a phase power taking from the three-phase and four-line circuit; but by 360 ° of rectification full bridge structures; carry out power taking mutually from each of electric line; i.e. (A+B+C+N) power supply plan, which supply lines decompression of electric line so no matter, it can obtain sufficient voltage and offer residual current circuit breaker from electrical network; thereby more reliable creepage protection function has just been arranged, realized more reliable earth leakage protective.

Description of drawings

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is 360 ° of rectification full-bridge winding diagrams of the present utility model;

Fig. 3 is a schematic diagram of the present utility model.

Embodiment

As shown in Figure 1, 2, 3; the utility model earth leakage circuit breaker; have overload flow circuit breaker 1,360 ° of rectification full-bridges 2, LE circuit and actuators 3, zero-sequence transformer 4, leak(age) test button 5; wherein 360 ° of rectification full-bridges 2 have eight rectifier diodes, are connected in A, B, four power lines of C, N.360 ° of rectification full-bridges 2 can independently be arranged to an element, also can be arranged on the circuit board of LE circuit the element that forms a whole with it.

When the power supply normal power supply; the ABC three-phase sees through 360 ° of rectification full-bridges 2 and supplies with the subsequent conditioning circuit electric energy; after any phase or two-phase decompression; also have other two-phase or to pass through 360 ° of rectification full-bridges 2 mutually to subsequent conditioning circuit and actuator's electric energy; to improve the functional reliability of earth leakage circuit breaker greatly like this, realize the protection purpose of highly reliable earth leakage circuit breaker.

Claims

1. earth leakage circuit breaker; have overload flow circuit breaker (1), rectification full-bridge, LE circuit and actuator (3), zero-sequence transformer (4), leak(age) test button (5); it is characterized in that: described rectification full-bridge is 360 ° of rectification full-bridges (2) structures; have eight rectifier diodes, be connected in A, B, four power lines of C, N.

2. earth leakage circuit breaker according to claim 1 is characterized in that: described 360 ° of rectification full-bridges (2) are provided with for independent.

3. earth leakage circuit breaker according to claim 1 is characterized in that: described 360 ° of rectification full-bridges (2) are arranged on the circuit board of LE circuit.