CN1083611C

CN1083611C - Circuit breaker operating mechanism with wide opening angle

Info

Publication number: CN1083611C
Application number: CN97104909A
Authority: CN
Inventors: 菲利浦·德尔卡博利
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 1996-03-29
Filing date: 1997-03-26
Publication date: 2002-04-24
Anticipated expiration: 2017-03-26
Also published as: HU9700618D0; EP0798756A1; PL184352B1; HU221673B1; ID16415A; CN1164116A; DE69733168D1; ES2242210T3; FR2746957B1; DE69733168T2; FR2746957A1; CZ287559B6; ZA972539B; EP0798756B1; TR199700248A3; BR9701509A; BR9701509B1; PL319151A1; BRPI9701509B8; EA000520B1

Abstract

A machine for contrlling a breakable mechanical link comprises a rotated plate 16 driving a contact arm 12, a trigger rod 18 tripped automatically when creepage occurs and a handle 20. To improve the insulative space and insulative intensity, The abutment 70 placed on the plate 16 is separated with respect to the axis 42 of the contact arm 12 by a first radius, R1, and from the pivot 14 on which the plate rotates by a second radius, R2. The difference in radii produces an amplified angle of opening beta of the contact arm 12 which is greater than the angular path alpha of the plate 16.

Description

The operating mechanism of wide opening angle circuit-breaker

The present invention relates to a kind of operating mechanism of circuit-breaker.

Fig. 1-3 illustrates the operating mechanism of an available circuit circuit breaker D.This mechanism 10 comprises that one supports the support bar 11 of moving contact arm 12, and this moving contact arm is hinged on the pivot 14 of rotating drive plate 16.Trip(ping) bar 18 also is hinged on the plate 16, but its axle and pivot 14 stagger.For simplicity's sake, the connecting rod between the latch hook of handle 20 and plate 16 is not shown.First transferring elements 22 and second transferring elements 24 that can pass to position and power information supplementary module A are arranged respectively on handle 20 and the trip(ping) bar 18.

Supplementary module A can be tripping operation or the signaling module that is contained on the larger side face of shell 26 of circuit-breaker D.In Fig. 2, first transferring elements 22 of the handle 20 of circuit-breaker D is by handle 28 mechanical connections of first joystick 30 with supplementary module A.Second transferring elements 24 is mechanically connected on the supplementary module A by second joystick 32.First joystick 30 passes to this supplementary module to the signal of the open and close state of indication circuit circuit breaker when modules A is made of a signaling module OF.Two-way second joystick 32 signal along the tripping operation of a steering handle indication circuit circuit breaker D when supplementary module A is made of an electric leakage signal module SD passes to this supplementary module A; or represent supplementary module A with opposite steering handle; for example the signal of the trip command of an earth leakage protector passes to circuit-breaker D.

The visible patent EP-A-295 of the operational detail of this mechanism, 158.When opened in 34,36 minutes the contact, a stop 38 of rotor plate 16 drove support bar 11 and rotates counterclockwise around pivot 14.At open position (Fig. 3), the opening angle α of moving contact arm 12 is substantially equal to the angular displacement of plate 16 after eliminate in the gap between stop 38 and the support bar 11.

In order still to use same supplementary module A, when expanded circuit circuit breaker scope, must consider transferring

elements

22,24 at the different operating state, particularly closed, open and trip after position and gap, angle.If when support bar 11 was hinged on the pivot 14 of plate 16 all the time, the opening angle α of moving contact 12 just remained unchanged.The dielectric strength of the sort circuit circuit breaker that is directly proportional with the distance of separate contacts when opening 34,36 is just not much of that for the switching device of high rating electrical.

The purpose of this invention is to provide a kind of circuit-breaker, no matter be manually or automatic working method, the motion conditions that it need not to change the transferring elements that is connected with supplementary module just can improve dielectric strength.

For realizing purpose of the present invention, circuit-breaker of the present invention has an insulation crust, and fixed contact and moving contact are housed in the shell, and described moving contact is subjected to the support of a contact point arm, this contact point arm is subjected to the driving of this mechanism and can moves between make position and open position, and this mechanism comprises:

One handle has first parts that are used for transmitting position and/or operation information on it;

One drives the drive plate of the support bar of support contact arm, and described plate is contained on the pivot with rotating manner, and when tripping operation took place, described plate (16) was first angular displacement alpha around the angular displacement of described pivot (14);

One be arranged in this drive plate and one with bar that this handle is connected between the mechanical linkage that disconnects, described connecting rod is by a manipulation that is subjected to the trip(ping) bar of trip component control, makes to disconnect when electric leakage and realize the automatic trip of this mechanism;

Transmission power supply on this trip(ping) bar and/or second transferring elements of operation information.

Mechanism of the present invention is characterised in that, the opening that the axle of contact point arm is fastened on the shell and this plate pivot passes this plate with staggering certain distance relatively; And have one to drive stop on the plate, described driving stop is first radius apart from the distance of the axle (42) of described contact point arm, described driving stop is second radius apart from the distance of this pivot, described two radius is different, the angular displacement that contact point arm turns over around its axle during tripping operation is opening angle β, and described angle β is bigger than the angular displacement alpha of described plate.

Contact point arm that is caused by the off-centre of contact point arm axle and the differences in motion between the plate make the angular displacement that need not to change plate can improve insulation distance, and still can be connected with the standard supplementary module.

According to a feature of the present invention, the opening ovalize that passes for the axle of plate, thus contact point arm played the leverage that separates in two contacts on the direction.

From to can clearlyer finding out other advantage and feature the following explanation of the nonrestrictive exemplary embodiment of the present invention shown in the drawings, in the accompanying drawing:

Fig. 1 is the front view of the signal of available circuit breaker mechanism, and two contacts are in closure state;

Fig. 2 illustrates Fig. 1 circuit-breaker and supplementary module with dwindling, particularly the connection of tripping operation or signaling module;

Fig. 3 is identical with structure shown in Figure 1, but two contacts are in open mode;

Fig. 4 is the cutaway view vertically according to operating mechanism of the present invention;

Fig. 5 and Fig. 6 are respectively along 5-5 line among Fig. 4 and 6-6 line and cut open the profile of getting; Two contacts of this mechanism are in closure state;

Fig. 7 is identical with the structure of Fig. 6, but two contacts of this mechanism are shown in an open position;

Fig. 8 is the schematic diagram according to mechanism shown in Figure 6, illustrates two contact manual unlocking of fusion;

Fig. 9 equally is another embodiment according to Fig. 6 with Fig. 8;

In Fig. 4-7, represent with same numeral with parts identical in the mechanism of Fig. 1-3.This mechanism 40 comprises a moving contact arm 12, and its opening angle β enlarges because of the off-centre of the pivot 14 of axle 42 relative drive plates 16.

Two part plates 16 are made of a pair of

parts

16a, 16b, and each parts has the pivot 14 among bearing 44a, the 44b that is installed on the insulation crust 46.Trip(ping) bar 18 is enclosed within rotationally on the axle 48 of plate 16 and cooperates with a tripping operation part 50 that handled by the disconnecting link 52 of electromagnetic trip device 54.

Second transferring elements 24 is arranged in when electric leakage and disconnects plate 16 and be connected on the trip(ping) bar 18 of mechanical connection between the bar 56 on the handle 20.This mechanical connection is realized by the latch hook 58 on the axle 60 that is hinged on plate 16.

The axle 42 of moving contact arm 12 is passed an elliptical openings 62 of plate 16 and is supported in the bearing on the relative both sides of shell 46.Opening 62 and pivot 14 and the axle 48 of each

parts

16a, 16b of plate 16 stagger, and pivot 14 is between the axle 42 and moving contact 36 of contact point arm 12.

First spring 64 that plate 16 is shifted onto open position comprises a torsion spring on the pivot 14.One steel hinge line end of torsion spring 64 is fixed on the plate 16, the other end and shell 46 one fixedly stop be connected.Second spring 66 that forms contact pressure is arranged on the projection 68 of support bar 11 and on axle 42.But this spring 66 makes plate 16 shift make position onto with support bar 11 relative motions and support bar, thus and 34 formation of fixed contact, one predetermined contact pressure.

Have one to drive stop 70 and cooperate with a bearing-surface 72 of support bar 11 and this support bar is shifted onto open position on the plate 16.Radius R 1 between the axle 42 of contact point arm 12 and the driving stop 70 is less than the pivot 14 of plate 16 and the radius R 2 between the same stop 70.

When pulling handle 20 with hand or the electric leakage automatic trip takes place, contact 34,36 moves to open position along with plate 16 and separates.In both cases, drive that stop 70 cooperates with the bearing-surface 72 of support bar 11 and support bar is pushed to counterclockwise the position (Fig. 7) of

opening contact

34,36.

The difference of radius R 1 and radius R 2 forms the opening angle β of a contact point arm 12 that has enlarged, and the rotational travel of plate 16 still equates with Fig. 3.Because therefore 12 dozens of De Gengkai of contact point arm have increased insulation distance; And the rotational angle α of plate 16 still is suitable for the motion conditions of transferring

elements

22,24 at handle 26 and trip(ping) bar 18 places.

From Fig. 8 as seen, when opening with handle 20, the bearing of the axle 42 in the slotted eye 62 of shell 46 makes moving contact arm 12 play leverage, thereby is convenient to open in the

contact

34,36 of fusion state at the S point everywhere.Axle 42 is pushed to the right-hand member of elliptical openings 62 usually by spring 66.When

contact

34,36 was in the fusion state, handle 20 was shifted open position onto and just can be made the last slightly act of contact point arm 12 and axle 42 is shifted onto the left side of opening 62, thereby moves on to primary importance 1 from initial position 0.

According to another embodiment of Fig. 9, opening 62 tilts, this make along with axle 42 when initial position 0 moves on to the second place 2, except leverage, also produce shear action at fusion points S place.This shear action makes between moving contact 36 and the fixed contact 34 and to take place to slide and play the contact automatic cleaning action.

Claims

1. the operating mechanism of a circuit-breaker, this circuit-breaker has an insulation crust (46), a pair of fixed contact and moving contact (34,36) are housed in the described shell, described moving contact is supported by a contact point arm (12), this contact point arm is subjected to the driving of this mechanism (40) and can moves between make position and open position, and this mechanism comprises:

One handle (20) has first parts (22) that are used for transmitting position and/or operation information on it;

The drive plate (16) of one contact-actuating arm (12) support bar (11), described plate (16) are installed on the pivot (14), and when tripping operation took place, described plate (16) was first angular displacement alpha around the angular displacement of described pivot (14);

One be arranged in this drive plate (16) and one with bar (56) that this handle (20) is connected between the mechanical linkage that disconnects, described connecting rod is subjected to the manipulation of the trip(ping) bar (18) of trip component control by one, and disconnects when electric leakage and realize the automatic trip of this mechanism (40);

Second transferring elements (24) of transmission power supply on this trip(ping) bar (18) and/or operation information,

It is characterized in that the axle (42) of described contact point arm (12) is fastened on the opening (62) that described shell (46) is gone up and this pivot (14) passes this plate (16) with staggering a preset distance relatively; And have one to drive stop (70) on the plate (16), described driving stop (70) is first radius (R1) apart from the distance of the axle (42) of described contact point arm (12), described driving stop (70) is second radius (R2) apart from the distance of this pivot (14), described two radius (R1, R2) is different, the angular displacement that contact point arm during tripping operation (12) turns over around its axle (42) is opening angle β, and described angle β is bigger than the angular displacement alpha of described plate (16).

2. by the described operating mechanism of claim 1, it is characterized in that, for described axle (42) pass described plate (16), can go up at contact point arm (12) and produce opening (62) ovalize that makes the leverage that two contacts (34,36) separate.

3. by the described operating mechanism of claim 2, it is characterized in that, the opening (62) on the described plate (16) have can make two contacts produce can self-cleaning shear action, according to the inclination of predetermined direction.

4. by the described operating mechanism of arbitrary claim of claim 1-3, it is characterized in that the pivot (14) of described plate (16) is positioned between the axle (42) and described moving contact (36) of described contact point arm (12); The axle (48) of described trip(ping) bar (18) is on plate (16).