CN201069746Y

CN201069746Y - Electronic current leakage breaker

Info

Publication number: CN201069746Y
Application number: CNU200720073963XU
Authority: CN
Inventors: 何邦权
Original assignee: Zhejiang Provice Zhiming Electric Imp & Exp Co Ltd
Current assignee: Zhejiang Dingwei Technology Co., Ltd.
Priority date: 2007-08-22
Filing date: 2007-08-22
Publication date: 2008-06-04
Anticipated expiration: 2017-08-22

Abstract

An electronic leakage circuit breaker includes a circuit breaker release mechanism, a leakage release mechanism and double metal sheets. The leakage circuit breaker is characterized in that a moving contact B and a bracket of the circuit breaker release mechanism are fixed on one end of a shaft coupler, the other end of the shaft coupler is fixed with a lever A of the leakage release mechanism, and a moving contact A is fixed on the lever A. The utility model has the advantages of good synchronism of close and separation of the moving and the static contacts of the circuit breaker part and the leakage part, improved stability of whole machine, compact structure, small volume, smart operation, leakage indicating function, and the function of indicating the contact state . The utility model is applicable to line with alternate current of 50Hz, rated operational voltage of 230V and rated current less than 63A, and used for backup protection of human subject to direct or indirect electric shock, over-current protection of the line for buildings or the like, and protection from fire caused by grounding failure which is continuously present due to failure actuation of a device for over-current protection.

Description

The electronic type residual current circuit breaker

Technical field

The utility model relates to a kind of residual current circuit breaker, particularly a kind of electronic type residual current circuit breaker that integrates overload protection, short-circuit protection and earth leakage protective.

Background technology

Interlock between existing circuit breaker part and the electric leakage part is the lever that connects the electric leakage part by the U-shaped bar on the handle of breaker portion; the closure that this design feature causes breaker portion and the dynamic/static contact of electric leakage part with separate poor synchronization; misoperation easily; do not reach the earth leakage protective effect; separate as moving contact, fixed contact when breaker portion; and this moment, handle can not reset; the U-shaped bar can not drive electric leakage part moving contact, fixed contact are separated; still be in "on" position, do not reach the earth leakage protective effect.

Summary of the invention

Technical problem of the present utility model is a closure that a kind of breaker portion and the dynamic/static contact of electric leakage part will be provided and separate synchronism good electron formula residual current circuit breaker.

In order to solve above technical problem, the utility model provides a kind of electronic type residual current circuit breaker, comprise breaker tripping mechanism, electrical leakage tripping device and bimetal leaf, be characterized in, the moving contact B of breaker tripping mechanism and an end of support and coupking shaft are fixed, the lever A of the other end of coupking shaft and electrical leakage tripping device fixes, and moving contact A is fixed on the lever A.

Described breaker tripping mechanism, its handle links to each other with an end of U-shaped bar, and the other end of U-shaped bar links to each other with lever C, and the cylindrical end of lever C is fixed on the housing, support and moving contact B go here and there together by coupking shaft and lever C, fixed contact B is fixed on the housing, and an end of support is near tripping, the adjacent snap close of the other end of tripping, breaker tripping mechanism also is provided with electromagnetic system, be provided with the iron core push rod in the electromagnetic system, an end of bimetal leaf is fixed on the housing, and the other end is near snap close.

Described electrical leakage tripping device, its instrument transformer links to each other with electronic building brick by lead, electronic building brick links to each other with release by lead, be provided with an iron core in the release, the adjacent iron core of lever B, the cylindrical end of lever B is fixed on the housing, the other end of lever B is near snap close, circular hole on the moving contact A is fixed on the lever A, fixed contact A is fixed on the housing, another cylindrical end of lever A is fixed on the housing with needle roller, and making lever A is that rotate at the center with the needle roller, and lever A and coupking shaft are fixed and linked with moving contact B in the breaker tripping mechanism.

Superior effect of the present utility model is:

1) closure of breaker portion and the dynamic/static contact of electric leakage part has improved the stability of complete machine with to separate synchronism good.

2) compact conformation, volume is little, and flexible operation has electric leakage deixis and contact state deixis.

3) the utility model is applicable to and exchanges 50HZ; rated operational voltage 230V; in the circuit below the rated current 63A; be used for the people is carried out backup protection by direct contact or indirect contact electric shock; and the circuit of building and similar applications carried out overcurrent protection, the fire that the earth fault that also can continue to exist being failure to actuate owing to overcurrent protective device causes provides protection.

Description of drawings

Fig. 1 is the structural representation of electrical leakage tripping device of the present utility model;

Fig. 2 is the structural representation of breaker tripping mechanism of the present utility model;

Fig. 3 is the structural representation that lever A is connected with the moving contact B of breaker tripping mechanism by coupking shaft in the electrical leakage tripping device of the present utility model;

The number in the figure explanation

1-fixed contact A; 2-moving contact A;

3-lever A; The 4-needle roller;

The 5-test button; The 6-release;

7-release iron core; The 8-indication piece that leaks electricity;

9-lever B; The 10-electronic building brick;

The 11-instrument transformer; The 12-iron core;

The 13-coil; The 14-bimetal leaf;

The 15-snap close; The 16-handle;

17-U shape bar; The 18-tripping;

19-lever C; The 20-support;

The 21-coupking shaft; 22-moving contact B;

23-fixed contact B; The 24-housing.

Embodiment

See also Fig. 1, Fig. 2 and shown in Figure 3, the utility model will be further described.

The utility model provides a kind of electronic type residual current circuit breaker, comprise breaker tripping mechanism, electrical leakage tripping device and bimetal leaf, be characterized in, the moving contact B 22 of breaker tripping mechanism and support 20 are fixed with an end of coupking shaft 21, the lever A3 of the other end of coupking shaft 21 and electrical leakage tripping device fixes, and moving contact A2 is fixed on the lever A3.

Described electrical leakage tripping device, see shown in Figure 1, its instrument transformer 11 links to each other with electronic building brick 10 by lead, electronic building brick 10 links to each other with release 6 by lead, be provided with an iron core 7 in the release 6, the adjacent iron core 7 of lever B9, the cylindrical end of lever B9 is fixed on the housing 24, the other end of lever B9 is near snap close 15, circular hole on the moving contact A2 is fixed on the lever A3, and fixed contact A1 is fixed on the housing 24, and another cylindrical end on the lever A3 is fixed on the housing 24 with needle roller 4, making lever A3 is that rotate at the center with needle roller 4, and lever A3 and coupking shaft 21 are fixing and link with moving contact B22 in the breaker tripping mechanism.

Described breaker tripping mechanism, see shown in Figure 2, its handle 16 links to each other with an end of U-shaped bar 17, the other end of U-shaped bar 17 links to each other with lever C19, the cylindrical end of lever C19 is fixed on the housing 24, support 20 is gone here and there together with lever C19 by coupking shaft 21 with moving contact B22, fixed contact B23 is fixed on the housing 24, one end of support 20 is near tripping 18, the adjacent snap close 15 of the other end of tripping 18, breaker tripping mechanism also is provided with electromagnetic system 13, is provided with iron core push rod 12 in the electromagnetic system 13, one end of bimetal leaf 14 is fixed on the housing 24, and the other end is near snap close 15.

The operation principle of the utility model from the initial condition to the closing course is as described below: upwards operation of handle 16, drive 17 motions of U-shaped bar, U-shaped bar 17 links to each other with lever C19, because the impetus of U-shaped bar 17, lever C19 begins to rotate, support 20 is gone here and there together with lever C by coupking shaft 21 with moving contact B 22, so support 20 and and then motion of moving contact B22, because support 20 1 ends are near tripping 18, one end of tripping 18 supporting brackets 20, so moving to fixed contact B23 is closed, ends moving contact B22, have the contact state indication on the lever C19, green is designated as off-state, and redness is designated as "on" position, this moment, the contact state indication became redness by green, and breaker portion enters "on" position.Because lever A3 and the moving contact B22 of electric leakage part are interaction relations, the motion of moving contact B22, lever A3 also and then rotates, drive moving contact A2 up to fixed contact A1 closure, electric leakage partly also enters "on" position.

The utility model integrates overload protection, short-circuit protection and earth leakage protective, below specifies:

1) overload protection:

When the energising operation, having electric current in circuit passes through, when this electric current during in rated current, can make bimetal leaf 14 heatings crooked, bimetal leaf 14 bends to one regularly, its top will come to snap close 15, snap close 15 will rotate, snap close 15 will separate with tripping 18, because an end of support 20 is by tripping 18 supportings, so the rotation of tripping 18 can make support 20, lever C19, moving contact B22 returning movement together, moving contact B22 separates rapidly with fixed contact B23, and handle 16 is got back to initial position.Because moving contact B22 returning movement, lever A3 is interlock and then, and moving contact A2 separates rapidly with fixed contact A1.

2) short-circuit protection

When circuit is short-circuited, coil in the electromagnetic system 13 can produce a powerful magnetic field pulling iron core push rod 12, make iron core push rod 12 promote snap close 15, snap close 15 is separated with tripping 18, because an end of support 20 is by tripping 18 supportings, so the rotation of tripping 18 can make support 20, lever C19, moving contact B22 returning movement together, moving contact B22 separates rapidly with fixed contact B23, and handle 16 is got back to initial position.Because moving contact B22 returning movement, lever A3 is interlock and then, and moving contact A2 separates rapidly with fixed contact A1.

3) earth leakage protective:

Press test button 5 and can produce a simulation electric leakage, when leakage current flows through instrument transformer 11, produce induced current, induced current is through electronic building brick 10, under the electric current amplification of electronic building brick 10, produce amplified current and give leakage tripping device 6, leakage tripping device iron core 7 pull lever B9 are rotated, the end of lever B9 promotes snap close 15 and rotates, snap close 15 is separated, because an end of support 20 is by tripping 18 supportings, so the rotation of tripping 18 can make support 20 with tripping 18, lever C19, moving contact B22 is returning movement together, moving contact B22 separates rapidly with fixed contact B23, and handle 16 is got back to initial position.Because moving contact B22 returning movement, lever A3 is interlock and then, and moving contact A2 separates rapidly with fixed contact A1.

Claims

1. an electronic type residual current circuit breaker comprises breaker tripping mechanism, electrical leakage tripping device and bimetal leaf, it is characterized in that:

The moving contact B (22) of breaker tripping mechanism and support (20) are fixed with an end of coupking shaft (21), and the lever A (3) of the other end of coupking shaft (21) and electrical leakage tripping device is fixing, and moving contact A (2) is fixed on the lever A (3).

2. by the described a kind of electronic type residual current circuit breaker of claim 1, it is characterized in that:

Described breaker tripping mechanism, its handle (16) links to each other with an end of U-shaped bar (17), the other end of U-shaped bar (17) links to each other with lever C (19), the cylindrical end of lever C (19) is fixed on the housing (24), support (20) is gone here and there together with lever C (19) by coupking shaft (21) with moving contact B (22), fixed contact B (23) is fixed on the housing (24), one end of support (20) is near tripping (18), the adjacent snap close of the other end (15) of tripping (18), breaker tripping mechanism also is provided with electromagnetic system (13), be provided with iron core push rod (12) in the electromagnetic system (13), one end of bimetal leaf (14) is fixed on the housing (24), and the other end is near snap close (15).

3. by the described a kind of electronic type residual current circuit breaker of claim 1, it is characterized in that:

Described electrical leakage tripping device, its instrument transformer (11) links to each other with electronic building brick (10) by lead, electronic building brick (10) links to each other with release (6) by lead, be provided with an iron core (7) in the release (6), the adjacent iron core of lever B (9) (7), the cylindrical end of lever B (9) is fixed on the housing (24), the other end of lever B (9) is near snap close (15), circular hole on the moving contact A (2) is fixed on the lever A (3), fixed contact A (1) is fixed on the housing (24), another cylindrical end of lever A (3) is fixed on the housing (24) with needle roller (4), lever A (3) and coupking shaft (21) fixing and with breaker tripping mechanism in moving contact B (22) interlock.