CN203288550U - Residual-current circuit breaker - Google Patents

Abstract

The utility model discloses a residual-current circuit breaker including a shell and an operation mechanism. A movable contact, a static contact, an arc extinguish chamber, a residual current detecting element, an electromagnetic trip unit, a mechanical trip mechanism and an operation executing mechanism are arranged in the shell. The electromagnetic trip unit includes a residual current movable iron core, a residual current coil and a push rod. An electromagnetic trip system includes an instant coil, an instant iron core spring, a magnetic yoke, a static contact rod, a movable iron core and a static iron core. The instant coil is correspondingly equipped with the movable iron core and the static iron core attracting each other. The instant iron core spring is arranged between the movable iron core and the static iron core. The push rod is penetrated through the movable iron core. And the residual current iron core spring is arranged between the push rod and the static iron core. A center shaft of the push rod is coaxial with a center shaft of the residual current movable iron core. The electromagnetic trip unit provided by the utility model is simple in structure and reliable in operation.

Description

A kind of residual current circuit breaker

Technical field

The utility model relates to a kind of low-voltage protection device, relates in particular to a kind of residual current circuit breaker.

Background technology

Residual current circuit breaker is a kind of electric safety device.Earth leakage protective device is arranged in low-voltage circuit, and when electric leakage occurring and get an electric shock, and while reaching the operating current value that protector limits, the auto power off that just moves within the time that limits is immediately protected.Existing earth leakage protective device structure mainly is comprised of three parts usually: detecting element, middle amplifying element, operation actuator.Wherein detecting element is comprised of zero-sequence transformer, in order to detect leakage current, and sends signal; Amplifying element: amplifying element comprises electric leakage signal amplifying unit, electromagnetic trip unit and mechanical trip mechanism; the electric leakage signal amplifying unit amplifies the action of rear drive electromagnetic trip unit with faint electric leakage signal; thereby this action touches snap close Crush trigger tripping mechanism; make main switch be transformed into open position by make position; thereby cut off the electricity supply, make protected circuit break away from the tripping operation parts of electrical network.The structure of existing electromagnetic trip unit normally yoke generation magnetic field adhesive armature drives the form of threading off, the complicated structure that this mode is leaked electricity and threaded off and move dropout wink.

Summary of the invention

The purpose of this utility model is to provide the electromagnetic trip cellular construction more simple residual current circuit breaker for the defect that overcomes prior art.

the utility model in order to achieve the above object, a kind of residual current circuit breaker is provided, comprise housing and operating mechanism, be provided with moving contact in housing, fixed contact, arc control device, the detection of electrical leakage element, electromagnetic trip unit and mechanical trip mechanism and operation actuator, it is characterized in that: described electromagnetic trip unit comprises moving trip unit of electric leakage electromagnetic trip unit and wink, described electric leakage electromagnetic trip unit comprises the moving iron core of electric leakage, electric leakage iron core spring, the electric leakage coil, push rod, wink, moving trip unit comprised the wink moving winding, wink is moved the iron core spring, yoke, moving iron core, static iron core, described electric leakage coil is on the electric leakage bobbin, and the moving iron mandrel of electric leakage is to being slidably disposed in electric leakage bobbin centre bore, described wink, moving winding was on wink moving winding frame, be provided with moving iron core and static iron core in wink moving winding frame centre bore, described moving iron core and static iron core are equipped with axially extending bore, moving iron core and static iron core is coaxial is arranged in wink moving winding frame centre bore, wherein moving iron mandrel is to being mounted slidably, described electric leakage bobbin is arranged on coaxially the wink moving winding and sets up the other end of static iron core, push rod clearance coordinates to be arranged in to be moved in iron core and static iron core centre bore, be provided with moving iron core spring of wink between described moving iron core and static iron core, be provided with electric leakage iron core spring between described push rod and static iron core, push rod central shaft and the coaxial formation interlock of the moving core center axle of electric leakage, described push rod front end is aimed at the snap close in mechanical trip mechanism.

Compared with prior art, electromagnetic trip cellular construction of the present utility model is simple, works more reliable.

Below in conjunction with the accompanying drawings and the specific embodiments the utility model is described further.

Description of drawings

Accompanying drawing 1 is the utility model specific embodiment internal structure schematic diagram;

Accompanying drawing 2 the utility model electromagnetic trip unit specific embodiment structural representations.

Embodiment

As shown in Figure 1, residual current circuit breaker comprises detection of electrical leakage unit, electric leakage signal amplifying unit, electromagnetic trip unit and mechanical trip mechanism, operation actuator, and detecting unit is comprised of zero-sequence transformer, detects leakage current, and sends signal; The electric leakage signal amplifying unit amplifies faint electric leakage signal, operation actuator comprises transmission mechanism, the latching device between movable contact spring support 3, handle 2 and movable contact spring support 3 and handle 2, handle 2 is arranged on the shell wall of housing 1 front side rotationally, arc control device 4 are arranged on relative opposite side, described electromagnetic trip unit is arranged between operating mechanism and arc control device 4, and described mechanical trip mechanism is arranged on downside.as shown in Figure 2, described electromagnetic trip unit comprises moving trip unit 6 of electric leakage electromagnetic trip unit 5 and wink, and described electric leakage electromagnetic trip unit 5 comprises that the moving iron core 501 of electric leakage, electric leakage iron core spring 502, electric leakage coil 503, push rod 504, wink moving trip unit 6 comprises moving iron core spring 602 of wink moving winding 601, wink, yoke 603, moving iron core 604, static iron core 605, described electric leakage coil 503 is on electric leakage bobbin 505, and the moving iron core 501 of electric leakage axially is slidably disposed in electric leakage bobbin 505 centre bores, described wink, moving winding 601 was on wink moving winding frame 606, wink, the moving winding frame 606 was fixed on L shaped yoke 603, described moving iron core 604 and static iron core 605 are equipped with axially extending bore, moving iron core 604 and static iron core 605 is coaxial is arranged in wink moving winding frame 606 centre bores, wherein moving iron core 604 axially is mounted slidably, static iron core 605 is fixedly installed, described electric leakage bobbin 505 is arranged on coaxially wink moving winding frame 606 and is provided with the other end of static iron core 605, push rod 504 matched in clearance are arranged in moving iron core 604 and static iron core 605 centre bores, be provided with moving iron core spring 602 of wink between described moving iron core 604 and static iron core 605, moving iron core spring 602 1 ends were set in outside static iron core 605 and were against on yoke 603 wink, the other end is against on the end face of described moving iron core 604, described push rod 504 rear ends are provided with the shoulder rank, electric leakage iron core spring 502 is set on push rod 504 front ends, electric leakage iron core spring 502 1 ends are against on push rod 504 shoulder rank, the other end is against on the end face of described static iron core 605, push rod 504 is provided with axial blind hole towards an end of the moving iron core 501 of electric leakage, push rod 504 central shafts and the moving iron core 501 spigot shaft coaxle settings of electric leakage, the front end of the moving iron core 501 of described electric leakage and described axial blind hole matched in clearance are through and wherein form interlock, described push rod 504 front ends are aimed at the snap close in mechanical trip mechanism.In order to have excess current protective function; be provided with and also be provided with bimetal leaf 7 in described housing 1; described bimetal leaf 7 is near the snap close setting, and bimetal leaf 7 one ends are connected with the binding post conducting of a side in housing 1, and the other end connects and composes overload protecting mechanism by brush wire and moving contact conducting.

The course of work of residual current circuit breaker is as follows: when overload occurred circuit, bimetal leaf 7 thermal deformations produced thrust, promoted snap close and made mechanism's release minute deenergizing.When circuit is short-circuited, magnetictrip work, be wink moving winding 601 generation electromagnetic forces, thereby force moving iron core 604 to overcome and wink move iron core spring 602 compression stresses and static iron core 605 adhesives, simultaneously when moving iron core 604 motion, the compression stress that 504 of push rods overcome electric leakage iron core spring 502 promotes forward, and then promotes push rod 504, makes mechanism's release; When the electric current electric leakage occurs to set in circuit, magnetictrip is not worked, and this body running of leakage tripping device, the utility model adopt respectively the wink be separated from each other moving iron core spring 602 and electric leakage iron core spring 502 replace, electric leakage coil 503 produces electromagnetic force, electric leakage coil 503 generation electromagnetic forces will force moving iron core 501 504 of the push rods of promotion of electric leakage to overcome electric leakage iron core spring 502 compression stresses and promote forward, and then promotion push rod 504, can make mechanism's release equally.

Claims (3)

1. residual current circuit breaker, comprise housing and operating mechanism, be provided with moving contact, fixed contact, arc control device, detection of electrical leakage element, electromagnetic trip unit and mechanical trip mechanism and operation actuator in housing, it is characterized in that: described electromagnetic trip unit comprises moving trip unit of electric leakage electromagnetic trip unit and wink, described electric leakage electromagnetic trip unit comprises the moving iron core of electric leakage, electric leakage iron core spring, electric leakage coil, push rod, and wink, moving trip unit comprised moving iron core spring of wink moving winding, wink, yoke, moving iron core, static iron core, described electric leakage coil is on the electric leakage bobbin, and the moving iron mandrel of electric leakage is to being slidably disposed in electric leakage bobbin centre bore, described wink, moving winding was on wink moving winding frame, be provided with moving iron core and static iron core in wink moving winding frame centre bore, described moving iron core and static iron core are equipped with axially extending bore, moving iron core and static iron core is coaxial is arranged in wink moving winding frame centre bore, wherein moving iron mandrel is to being mounted slidably, described electric leakage bobbin is arranged on coaxially the wink moving winding and sets up the other end of static iron core, push rod clearance coordinates to be arranged in to be moved in iron core and static iron core centre bore, be provided with moving iron core spring of wink between described moving iron core and static iron core, be provided with electric leakage iron core spring between described push rod and static iron core, push rod central shaft and the coaxial formation interlock of the moving core center axle of electric leakage, described push rod front end is aimed at the snap close in mechanical trip mechanism.

2. residual current circuit breaker according to claim 1 is characterized in that: described operating mechanism and arc control device are arranged on both sides before and after the housing inner chamber, and described electromagnetic trip unit is arranged between operating mechanism and arc control device, and described mechanical trip mechanism is arranged on downside.

3. residual current circuit breaker according to claim 1; it is characterized in that: be provided with and also be provided with bimetal leaf in described housing; described bimetal leaf is near the snap close setting; bimetal leaf one end is connected with the binding post conducting of a side in housing, and the bimetal leaf other end connects and composes overload protecting mechanism by brush wire and moving contact conducting.

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