CN101814401B

CN101814401B - Tripping device of molded case circuit breaker

Info

Publication number: CN101814401B
Application number: CN201010149635XA
Authority: CN
Inventors: 杜建中; 姚相东; 李艳
Original assignee: SUZHOU INDUSTRIAL PARK FEIER INTELLIGENT ELECTRICAL APPARATUS Co Ltd
Current assignee: Jiangsu Feal Electrical Appliances Co., Ltd.
Priority date: 2010-04-16
Filing date: 2010-04-16
Publication date: 2012-08-22
Anticipated expiration: 2030-04-16
Also published as: CN101814401A

Abstract

The invention relates to a tripping device of a molded case circuit breaker, is an improvement on the tripping device of the conventional molded case circuit breaker and an improvement on the using method and mounting position of the tripping device, and belongs to the technical field of low-voltage electrical apparatus. The tripping device of the molded case circuit breaker is provided with a wire pad and an iron core, wherein the wire pad is wound by a plurality of loops of enameled wires and led out by two conducting wires; a spring is arranged in the wire pad; the lower half part of the step-shaped iron core is arranged in the spring; the wire pad is fixed between an upper bracket and a lower bracket; an upper gasket and a lower gasket are arranged between the iron core and the upper bracket and between the iron core and the lower bracket respectively; the iron core is 5.5 to 6mm higher than the upper gasket; the iron core, the upper gasket, the lower gasket, the upper bracket and the lower bracket are positioned on the same axis and provided with a hole respectively from which a screw rod is arranged from top to bottom; the lower gasket is arranged inside the wire pad; and the upper gasket is 3.5mm higher than the upper bracket. The tripping device has the advantages of integration, modular propelling, and improvement on the operation stability of the breaker and the like.

Description

A kind of tripping device of molded case circuit breaker

Technical field:

The present invention relates to a kind of tripping device of molded case circuit breaker, is the improvement to the release of existing breaker of plastic casing, also is simultaneously the method for using and the installation site of release are improved, and belongs to the low voltage electrical apparatus technology field.

Background technology:

Breaker of plastic casing is a protective device important in the low-voltage distribution system; In low-voltage distribution system, play connection, disjunction running current; And when circuit breaks down, play the effect of disengagement failure electric current apace automatically, generally comprise compositions such as contact arc-extinguishing system, operating mechanism, controller, manual tripping device and release.

The effect of release is to convert electrical energy into mechanical action, when receiving the controller trip signal, makes the breaker of plastic casing separating brake.Traditional release is divided into electronic trip unit and leakage tripping device etc., is generally the inner installation of circuit breaker, cooperates the draw bar of breaker of plastic casing to realize the action of threading off.

The basic structure of the release assembly of electric leakage breaker of plastic casing commonly used and manual tripping device is as shown in Figure 1 at present.Leakage tripping device is made up of line bag, iron core, spring, pull bar, support.The inner magnetic field that produces of line bag when the line bag passes through alternating current, iron core overcomes spring force pulling pull bar, and the draw bar of the operating mechanism of pull bar pulling circuit breaker makes breaker open operation.The effect of manual tripping device is to realize hand tripping, directly promotes the rotation of circuit breaker draw bar downwards through the moving trip push button of hand over hand, makes breaker open operation.The basic structure of manual tripping device is made up of trip push button, push rod, spring among Fig. 1.

The basic structure of another kind of electric leakage breaker of plastic casing release assembly of using always and manual tripping device is as shown in Figure 2, and its basic structure and operation principle are with basic identical with structure shown in Figure 1.

Fig. 3 is the basic block diagram of a kind of typical electronic release assembly and manual tripping device.Electronic trip unit is made up of line bag, magnet, iron core, spring, push rod, support.During breaker closing, circuit breaker promotes the push rod of release, release storage power; When the controller of circuit breaker sends control signal; Make the line bag through a DC, the inner moment generation of the line bag magnetic field force opposite, release release stored energy with Porcelain Jar; Promote the draw bar of circuit breaker operation mechanism, make breaker open operation; The manual tripping device principle is with the manual tripping device of RCCB.

Existing electronic trip unit and manual tripping device are two parts independent of each other, and these two parts are mounted respectively the diverse location at circuit breaker.In the process of breaker of plastic casing being carried out the expansion of intellectualized reconstruction and function, problems such as parts are many, installation complicacy have been run into when adopting existing scheme.This structure arrangement tends to the volume ratio of pursuing circuit breaker is brought obstacle and influenced integrated, modular realization; In addition, the electromagnetic field that produces under the heat that in running, produces of circuit breaker and the big current conditions may influence the tripping function of circuit breaker; Also have,, therefore can increase the loaded down with trivial details of assembling work and the raising that influences efficiency of assembling owing to need assemble respectively to two parts.

Summary of the invention:

In order to solve the deficiency of prior art, the invention provides a kind of tripping device of molded case circuit breaker.

The technical solution adopted for the present invention to solve the technical problems is: a kind of tripping device of molded case circuit breaker; Be provided with line bag, iron core, said line is wrapped and is wound with some circle enamelled wires and is drawn by two leads, and said line bag inside is provided with spring; Said iron core is a stairstepping; The latter half of said iron core is arranged in the spring, and said line bag is fixed between upper bracket and the lower carriage, is respectively equipped with liner and lower liner between said iron core and upper bracket and the lower carriage; Said iron core is than the high 5.5-6mm of last liner; Said iron core, last liner, lower liner, upper bracket and lower carriage are respectively equipped with the hole and are provided with a screw mandrel from top to bottom on same axis, said lower liner places the line bag inner, and the said liner of going up exceeds upper bracket 3.5mm.

For the ease of reaching optimum efficiency in use, further: said screw mandrel upper end is provided with an adjusting nut.

For the ease of the reliable separating brake of circuit breaker, further: said lower carriage below is provided with a push rod, and said push rod links to each other with the screw mandrel bottom.

For at the position of action point on leading screw and the circuit breaker draw bar on same straight line; Circuit breaker panel hand tripping button; Leading screw can make the reliable separating brake of circuit breaker equally not on same straight line the time, further: said screw mandrel top is fixed with a liner through nut.

The present invention has avoided in the prior art electronic trip unit, and the device of manually slipping out of the hand designs and be installed on the loaded down with trivial details phenomenon of diverse location respectively, progressively advances to integrated, modularization thereby help circuit breaker; Release of the present invention is installed on the inter panel of circuit breaker; The damage that electric arc causes release when having avoided circuit-breaker switching on-off; Improved the stability of circuit breaker operation; The dropout stroke and the natural length scalable that also have release, this installation and regulative mode are suitable for the electronic type molded case circuit breaker and the Thermomagnetic type breaker of plastic casing of various models and specification.

Description of drawings:

Fig. 1 is the basic block diagram of a kind of typical leakage tripping device assembly and manual tripping device.

Fig. 2 is the basic block diagram of another kind of typical leakage tripping device assembly and manual tripping device.

Fig. 3 is the basic block diagram of a kind of typical electronic release assembly and manual tripping device

Fig. 4 is a structure chart of the present invention.

Fig. 5 is an application example figure of the present invention.

Fig. 6 is the another application of the invention instance graph.

Fig. 7 is installed in the overall structure figure of circuit breaker for the present invention.

Among the figure: 1, line bag; 2, iron core; 3 springs, 4, lead; 5, upper bracket; 6, lower carriage; 7, go up liner; 8, lower liner; 9, screw mandrel; 10, adjusting nut; 11, push rod; 12, nut; 13, liner; 14, hand tripping button; 15, draw bar; 16, circuit breaker; 17, upper cover plate; 18, lower cover; 19, inter panel.

Embodiment:

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

In conjunction with shown in Figure 4, also draw around some circle enamelled wires on the at first online bag 1 with two leads 4, lower liner 8 is installed on the lower carriage 6; Last liner 7 installs on the upper bracket 5, and exposes 3.5mm, and leading screw 9 precession iron cores 2 are until exposing required leading screw length; Said iron core 2 is a stairstepping, and the latter half of iron core 2 places in the spring 3 in the line bag 1, then with iron core 2 and line bag 1 whole being separately fixed at up and down on upper bracket 5 and the lower carriage 6; Thereby last liner 7 makes and is mounted on the iron core 2, and said iron core 2 is than the high 5.5-6mm of last liner, and owing to iron core 2, go up liner 7, lower liner 8, upper bracket 5 and lower carriage 6 and on same axis, be provided with the hole; So final leading screw 9 can make leading screw 9 expose indefinite length with work requirements on integral body, then the present invention is installed on the inter panel 17 of circuit breaker 16; When 1 energising of line bag, produce magnetic field force, iron core 2 overcomes spring 3 and moves downward; Screw mandrel 9 pushes away the draw bar 15 of circuit breaker 16, makes the operating mechanism release of circuit breaker 16, circuit breaker 16 tripping operations; Also can push away the draw bar 15 of circuit breaker 16, make circuit breaker 16 tripping operations equally through hand tripping button 14.Circuit breaker 16 is divided into upper cover plate 17, lower cover 18 and inter panel 19; Its inside is provided with hand tripping button 14, draw bar 15 etc.; Tripping device of molded case circuit breaker is installed in circuit breaker 16 inside, and hand tripping button 14 is just in time supporting the screw mandrel 9 of tripping device of molded case circuit breaker, sees Fig. 7.

Because circuit breaker model, diversified in specifications, hand tripping button 14, leading screw 9, the position of action point on the draw bar 15 are not necessarily on same straight line.Suppose hand tripping button 14 at present, leading screw 9 on same straight line, leading screw 9; Draw bar 15 position of action point on same straight line, are not seen Fig. 5, and it is provided with a push rod 11 in lower carriage 6 bottoms on the basis of Fig. 4; And; Said push rod 11 is connected with screw mandrel 9, through push rod 11 make on leading screw 9 and the draw bar 15 position of action point point-blank, no matter be that the trip signal that the controller of circuit breaker 16 sends is threaded off circuit breaker 16; Still by hand tripping button 14, all can make circuit breaker 16 reliable separating brakes.To also have a kind of situation be leading screw 9 with draw bar 15 on position of action point on same straight line, hand tripping button 14, leading screw 9 be not on same straight line; See Fig. 6; It is on the basis of Fig. 4, on the prolongation screw mandrel 9 above the adjusting nut 10, through nut 12 fixed-bearings 13, its objective is to make circuit breaker 16 hand tripping buttons 14; Leading screw 9 is on same straight line, and the effect that is reached also is to let circuit breaker 15 reliable separating brakes.

Because circuit breaker 16 is highly different, hand tripping button 14, leading screw 9; Even the position of action point on the draw bar 16 is on same straight line; Push rod 11 is bad with the cooperation of circuit breaker draw bar, and circuit breaker is separating brake reliably, and an adjusting nut 10 can be set in the upper end of screw mandrel 9; Regulate the stroke of tripping device of molded case circuit breaker through regulating adjusting nut 10 on the leading screw 9, make circuit breaker 16 reliable separating brakes.

It is emphasized that: above only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. tripping device of molded case circuit breaker; Be provided with line bag (1), iron core (2), be wound with some circle enamelled wires on the said line bag (1) and drawn by two leads (4), said line bag (1) inside is provided with spring (3); Said iron core (2) is a stairstepping; The latter half of said iron core (2) is arranged in the spring (3), and said line bag (1) is fixed between upper bracket (5) and the lower carriage (6), is respectively equipped with liner (7) and lower liner (8) between said iron core (2) and upper bracket (5) and the lower carriage (6); It is characterized in that: said iron core (2) is than the high 5.5-6mm of last liner (7); Said iron core (2), last liner (7), lower liner (8), upper bracket (5) and lower carriage (6) are respectively equipped with the hole and are provided with a screw mandrel (9) from top to bottom on same axis, said lower liner (8) places line bag (1) inside, and the said liner (7) of going up exceeds upper bracket (5) 3.5mm; Said screw mandrel (9) upper end is provided with an adjusting nut (10); Said lower carriage (6) below is provided with a push rod (11), and said push rod (11) links to each other with screw mandrel (9) bottom; Said screw mandrel (9) top is fixed with a liner (13) through nut (12).