CN1826677A

CN1826677A - Differential switch provided with a test circuit

Info

Publication number: CN1826677A
Application number: CNA2004800210678A
Authority: CN
Inventors: P·科克
Original assignee: Legrand SA; Legrand SNC
Current assignee: Legrand SA; Legrand SNC
Priority date: 2003-07-21
Filing date: 2004-07-20
Publication date: 2006-08-30
Anticipated expiration: 2024-07-20
Also published as: WO2005010905A3; FR2858108A1; CN100470706C; EP1647041B1; ATE408233T1; DE602004016518D1; ES2314441T3; FR2858108B1; RU2006105204A; EP1647041A2; BRPI0412068A; PL1647041T3; RU2346351C2; WO2005010905A2

Abstract

The inventive differential switch comprises a fixed power contact (1), a pivotable power contact (2) a test contactor (15, 16, 17) and an automatic interruption conductive branch (10) connected to a connection terminal of the test contactor (15, 16, 17) which extends in a transversal direction with respect to the axis of rotation (8) of said pivotable contact (2). Said differential switch also comprises an automatic interruption blade (7) which is connected to the pivotable contact (2) and arranged with respect to the automatic interruption branch (10) in such a way that when the pivotable contact (2) is in the closed position thereof, said automatic interruption blade (7) is placed in front of the automatic interruption branch (10), and when the pivotable contact (2) is in the opened position thereof, the automatic interruption blade (7) is removed from the automatic interruption branch (10).

Description

Have the differential circuit breaker that detects the loop

Technical field

[01] field that the present invention relates to is electric installation and personnel's protection.

[02] The present invention be more particularly directed to a differential circuit breaker, it is furnished with the detection loop, is used to guarantee the good function of differential circuit breaker.

Background technology

[03] differential circuit breaker is a kind of equipment that is used for cutting off electric current.When having a leakage current, it can start automatically, so that open a current path.

[04] in fact, in protected current circuit, under the situation of a device appearance one with the problem of the phase current ground connection in loop, the current direction the earth of part proper flow in the loop this means to produce electric leakage.

[05] for the consideration of this conspicuous safety factor, be necessary and usually be legal requiremnt, should detect the existence of this leakage current, cut off this electric current then.This work is preferably finished by differential circuit breaker.

[06] usually; in such differential circuit breaker; the conductor of the current circuit that connection will be protected is surrounded by an induction coil; and; when the current strength of the current strength of a direction and another flow direction (it is illustrated in the existence that leakage current is arranged in the protected current circuit) not simultaneously; produce an induced current in the induction coil; and allow to give an acting device to power; described acting device starts mechanical device; open a pair of power interface tentaculum (une paire de contacts de puissance) then, at least one electrode of this cut-off loop.

[07] in addition, differential circuit breaker generally comprises one and detects the loop, and it can simulate the appearance of leakage current, and therefore verifies the good open circuit conditions of differential circuit breaker.

[08] principle that is generally used for simulating leakage current is to produce a support arm loop in differential circuit breaker; there is a resistance in described support arm loop; a utmost point of protected current circuit on one side of one of them binding post connection induction coil, another binding post is connected to an other utmost point of protected current circuit on the other side that connects induction coil.According to resistance value, produce the leakage current that to simulate.

[09] this support arm loop stays open state by a detection contactor, and for example push-button switch, and this contactor can contact from the casing of differential circuit breaker and obtain, and the user can use this measuring ability like this.

[10] in addition,, preferably set parts, be used for when differential circuit breaker is in dissengaged positions, suppress to detect the effect of contactor for safer.

[11] in fact; when differential circuit breaker disconnects; acting on the pressure that detects on the contactor causes the binding post of the device of protected current circuit to be connected to the binding post that detects resistance; if particularly this device can stored energy---as be both for example situation of television set, this causes dangerous appearance.

[12] inhibitory action in this detection loop is commonly called " cut off device automatically ".

[13] recognize a kind of such checkout gear from document EP 0165008, wherein, the inhibitory action of test button switch is that the mechanical caging by this button realizes, after differential circuit breaker started, described locking was worked.

[14] in addition, document EP 0456586 has been described one and has been detected the loop, and it is used for differential disconnector, and comprises several different springs, a mechanical transmission control device synergy of one of them spring and disconnector detects the loop thereby open when differential disconnector works.

[15] in the same manner, document EP 0295167 is described one and is used for differential electric protective Device Testing assembly.Assembly comprises a conductor piece that two support arms are arranged; a support arm guarantees the function of test button switch, and another support arm guarantees that by a mechanical component---this is used to open protected current circuit---of opening the contact connection automatic cut off device from its link position separately.

Summary of the invention

[16] the present invention is used to optimize such differential circuit breaker, and it is furnished with one and detects the loop, particularly relates to the detection loop with automatic cutting function.

[17] differential circuit breaker of the present invention's proposition, it comprises:

[18]-one a constant power contactor and a rotative power contactor, described rotative power contactor allows an off-position---and it abuts against described fixed contact arrangement in this position, and an open position---it separates mutually with described fixed contact in this position; With

[19]-one detect and touch device,

It is characterized in that [20] it also comprises:

[21]-one automatic cut off device conductor support arm, it is connected to the binding post that described detection touches device, and the edge is with respect to the horizontal direction extension of the rotating shaft of described rotating contactor;

[22]-one automatic cut off device conductor piece, it connects described rotating contactor, and face described automatic cut off device support arm and arrange, thereby, when described rotating contactor was in the closed position, described automatic cut off device conductor piece abutted against described automatic cut off device support arm and arranges, and, when described rotating contactor was shown in an open position, described automatic cut off device conductor piece from described automatic cut off device support arm separately.

[23] these make automatic cut off device realize that the element of function of automatically cutting off is all directly connecting the element of realizing the current circuit opening function that will protect.

[24] in fact, the cut off device conductor piece is directly to connect rotating contactor automatically, and the cut off device support arm faces automatic cut off device reed ground layout automatically, and these elements can be directly installed on the body of differential circuit breaker.Such as, do not need a differential circuit breaker box body that is used to support these elements.This makes and not to need to depend on dimensional tolerance, or does not need to depend on and be used for the change of shape of body such as add ons on the box body.

[25] in addition, the function of cut-out is automatically realized with respect to feasible not only the rotation by means of contactor of the layout of the horizontal direction extension of the rotating shaft of rotating contactor in described conductor arm edge, but also almost is independent of the mode of the change in location of rotating shaft by means of this rotation realization.

[26] element of forming differential circuit breaker mechanism has the trend of deformation, and for example under creep effect or moisture effect, the rotating shaft of described rotating contactor has along the trend that moves with the almost parallel direction of described automatic cut off device support arm.This to automatic cut off device reed with automatically between the cut off device support arm to contact influence little because this contact depends primarily on the position of automatic cut off device reed with respect to its described rotating shaft that is connecting.

[27] according to a preferable feature, described rotating contactor comprise in addition stretch out every a minute member, when described rotating contactor is shown in an open position, describedly can lift described automatic cut off device support arm every minute member.Described can be one transverse to described automatic cut off device support arm insulating material tongue piece every minute member.

[28] when rotating contactor is shown in an open position, describedly can increase distance between described automatic cut off device support arm and the described automatic cut off device reed every minute member.This guarantees that these two interelements better insulate, and also can less rely on the deformation of manufacturing tolerance and differential circuit breaker.

[29] in order to guarantee the good locations of automatic cut off device support arm, described can have a groove that can guide described automatic cut off device support arm every minute member.

[30] preferably, describedly place face-to-face, and be arranged in the both sides of the rotating shaft of described rotating contactor every minute member and described automatic cut off device conductor piece.

[31] this layout makes described automatic cut off device sheet and described automatic cut off device support arm cooperate mutually, thereby, when described automatic cut off device sheet during away from described automatic cut off device support arm, describedly lift described automatic cut off device support arm every a minute member, and, describedly unclamp described automatic cut off device support arm every a minute member when described automatic cut off device sheet during near described automatic cut off device support arm.The therefore favourable merging of the effect of these two elements.

[32] in addition differential circuit breaker it comprise that also one first stop refers to bar, it is arranged on the described automatic cut off device arm path, and can limit lifting of described automatic cut off device support arm.Equally, it comprises that also one second stop refers to bar, and itself and described first stop refer to ground, pole face opposite layout; And described automatic cut off device support arm is maintained at described first stop and refers to that bar and described second stop refer between the bar.

[33] these stop refer to that bar keeps described automatic cut off device support arm effectively, thereby abut against described automatic cut off device support arm when in place at described automatic cut off device reed, guarantee a good electrical connection.

[34] according to a preferred feature, detection touches device and comprises:

[35]-one test button, it can have a rest position to put and an active position;

[36]-one button spring, it is connected to described automatic cut off device support arm, and faces described conduction and touch end and arrange;

[37] described button spring is controlled by described test button, thereby, when described test button is in rest position, described button spring touches end separately from described, and, when described test button is in active position, described button spring and the described end in contact that touches.

[38] detection touches device therefore by economic and realization reliably.

[39] described button spring and described automatic cut off device support arm can be monomer spares, and the element number in the detection loop that this mode constitutes can reduce widely.

[40] for realizing considering that easily rotating contactor can be installed on the rotating stand, described bearing is made with insulating material, and has the described tongue piece of giving prominence to every minute member of formation.Equally, described movable contactor is connected to a conductor contact spring leaf, and described conductor contact spring leaf comprises a projection, and described projection forms described automatic cut off device reed.

Description of drawings

[41] other features and advantages of the present invention are by describing the preferred implementation that provides as limiting examples, and this is described with reference to following accompanying drawing:

[42] Fig. 1 is the perspective view of an assembly, described assembly comprises a joystick, fixed contact and one has the movable contactor of an automatic cut off device sheet, and one form the button spring and the member of cut off device support arm automatically, and movable contactor is in the closed position;

[43] Fig. 2 is an end view corresponding with Fig. 1;

[44] Fig. 3 one is similar to the perspective view of Fig. 1, and wherein, movable contactor is in the position of opening;

[45] Fig. 4 is an end view corresponding with Fig. 3;

[46] Fig. 5 is a left view corresponding to Fig. 4, and this figure comprises the subsidiary component of differential circuit breaker: the detection button of the one second pair of contactor and a control contact spring.

Embodiment

[47] at the element of Fig. 1 to the detection loop of some composition differential circuit breakers shown in Fig. 4, these elements illustrate by the position that normally occupies in cutter inside, and for the consideration that clearly demonstrates problem more, other parts show in the drawings.

[48] can see a fixed contact 1 and a movable contactor 2 in the drawings, they are used for opening or closing protected current circuit according to the order of differential circuit breaker.

[49] function of differential circuit breaker is well-known to those skilled in the art, does not do detailed description at this, equally also relevant element is not done description.Remind simply, under the situation that electrical problems (d é faut é lectrique) arranged, movable contactor 2 Be Controlled are so that separate (open position) with fixed contact 1.

Open spring 3 for [50] one and act on contactor 1,2, so that their rest position is exactly an open position.

[51] movable contactor 2 has a contact device 4, and when movable contactor 2 was in the closed position, contact device 4 was used in place against the similar contact device 5 that belongs on the fixed contact 1.

[52] contact device 4 of movable contactor 2 is installed on the insulated leg 6, and by a contact spring leaf 7 location, described contact spring leaf guarantees that the function of the reed of automatic cut off device realizes that this can be further explained below.

[53] insulated support 6 can be around one 8 rotation, so that the free angle that movable contactor need to obtain occupies open position (Fig. 1,2) and off-position (Fig. 3,4).

[54] insulated support 6 also has a tongue piece 14, and described tongue piece 14 faces contact spring leaf 7 ground and protrudes.These two

elements

7,14 extend along the direction transverse to rotating shaft 8, and are arranged in the both sides of axle 8.Tongue piece 14 has one to be used for the groove 19 of cooperating with automatic cut off device support arm 10 at an upper portion thereof.

[55] in Fig. 1 to Fig. 5, a joystick 9 also is shown, being used for can be approaching from the outside, so that the user can handle it.The parts of described joystick 9 control differential circuit breakers, and two positions are arranged, these two corresponding movable contactors 2 of positions difference are in two positions of Fig. 1 and Fig. 3.

[56] the monomer spare that comprises automatic cut off device support arm 10 and button spring 11 is placed on the described parts, thereby it laterally extends with respect to axle 8 on insulated support 6.

[57] automatically cut off device support arm 10 is retained in place in two stop and refers between the

bar

12,13 that described two stop refer to that

bar

12,13 is connected to a standing part (not shown) of differential circuit breaker.

[58] in addition, this automatic cut off device support arm 10 connects button spring (ressort depoussoir) 11, and button spring 11 faces conduction by a spiral coil and one and touches the protrusion support arms 15 that end 16 arranges and constitute.

[59] this conduction touches the terminals that end 16 is used for joint detection resistance (not shown), and the another one terminals of resistance connect an electrode of differential circuit breaker.

[60] referring to Fig. 5, a test button 17 sets in addition and is used for cooperating with described protrusion support arm 15.Test button is used for keeping slidably by the box body (not shown) of differential circuit breaker, so that can occupy a rest position puts---it actuates a described protrusion support arm 15 and an active position in this position---its promotes (under the effect the user) described protrusion support arm 15 and abuts against the described end 16 that touches in this position.

[61] element among Fig. 1 to 4 shown in Fig. 5 in addition, also illustrates a pair of second contactor 18, and the contactor 1,2 of 18 pairs of fronts of described second contactor is implemented control simultaneously, and this is a kind of common form in differential circuit breaker.

[62] in the position of Fig. 1 and 2, differential circuit breaker is in bonding station, and movable contactor 2 is in the closed position.

[63] therefore, the layout of the reed 7 by described tongue piece 14 and described automatic cut off device, when the reed 7 of automatic cut off device abutted against automatic cut off device support arm 10 location, tongue piece 14 had certain distance with cut off device support arm 10 automatically.Refer to the effect of

bar

12,13 automatic cut off device support arm 10 to be kept by two stop, with the reed 7 of automatic cut off device one good being electrically connected arranged so that guarantee by means of its elasticity.

[64] on Fig. 1 and 2, described protrusion support arm 15 is held and abuts against described conduction and touch end 16, the effect of this corresponding user on test button 17, but in order to make figure clear, test button 17 does not show in these two figure.

[65] in this configuration, by detecting resistance, touch the continuous electric of holding between 16 (the another one utmost points of differential circuit breaker) in fixed contact 1 (one of them utmost point of differential circuit breaker just) and conduction and be connected and guaranteed.

[66] therefore the function of cut off device is not in state of activation automatically, and can realize described measuring ability effectively under the effect of test button 17.

[67] in the situation of Fig. 3 and 4, antithesis, differential circuit breaker is in disengaging configuration, movable contactor 2 corresponding being shown in an open position.

[68] tongue piece 14 thereby be held against automatically cut off device support arm 10, and lift described support arm, cut off device reed 7 separates mutually with described support arm automatically simultaneously.

[69] reed 7 of cut off device depends on that with support arm 10 distance separating tongue piece 14 (also being and axle 8) and stop refer to the distance between the

bar

12,13 automatically.

[70] therefore the function of cutting off automatically activates, even mean that pressing detection button 17 to be based upon contacting of

support arm

15 and 16 of contraventions, to detect the loop and also do not set up continuous electrical connection.

[71] more generally, the example that the present invention is not limited to describe in the literary composition particularly is not limited to relate to the example that sets that conduction touches end 16 and button spring 11.

Claims

1. differential circuit breaker, it has:

-one a constant power contactor (1) and a rotative power contactor (2), described rotative power contactor allows an off-position---and it abuts against described fixed contact (1) arrangement in this position, and an open position---it separates mutually with described fixed contact (1) in this position; With

-one detection touches device (15,16,17),

It is characterized in that it also comprises:

-one automatic cut off device conductor support arm (10), it is connected to the binding post that described detection touches device (15,16,17), and the edge is with respect to the horizontal direction extension of the rotating shaft (8) of described rotating contactor (2);

-one automatic cut off device conductor piece (7), it is connected to described rotating contactor (2), and face described automatic cut off device support arm (10) and arrange, thereby, when described rotating contactor (2) was in the closed position, described automatic cut off device conductor piece (7) abutted against described automatic cut off device support arm (10) and arranges, and, when described rotating contactor (2) when being shown in an open position, described automatic cut off device conductor piece (7) from described automatic cut off device support arm (10) separately.

2. differential circuit breaker according to claim 1, it is characterized in that, described rotating contactor (2) also comprise stretch out every a minute member (14), when described rotating contactor (2) when being shown in an open position, describedly be suitable for lifting described automatic cut off device support arm (10) every a minute member (14).

3. differential circuit breaker according to claim 2 is characterized in that, described is an insulating material tongue piece every a minute member (14), and it arranges transverse to described automatic cut off device support arm (10).

4. differential circuit breaker according to claim 3 is characterized in that, described have a groove (19) every a minute member (14), and described groove (19) can guide described automatic cut off device support arm (10).

5. according to each described differential circuit breaker in the claim 2 to 4, it is characterized in that, describedly place face-to-face, and be arranged in the both sides of the rotating shaft (8) of described rotating contactor (2) every a minute member (14) and described automatic cut off device conductor piece (7).

6. according to each described differential circuit breaker in the claim 1 to 5, it is characterized in that it comprises that also one first stop refers to bar (12), it is arranged on described automatic cut off device support arm (10) path, and can limit lifting of described automatic cut off device support arm.

7. differential circuit breaker according to claim 6 is characterized in that, it comprises that also one second stop refers to bar (13), and itself and described first stop refer to that bar (12) arranges Face to face; And described automatic cut off device support arm (10) is maintained at described first stop and refers to that bar (12) and described second stop refer between the bar (13).

8. according to each described differential circuit breaker in the claim 1 to 7, it is characterized in that described detection touches device and comprises:

-one test button (17), it can have a rest position to put and an active position;

-one button spring (11,15), it is connected to described automatic cut off device support arm (10), and touches end (16) with described conduction and arrange Face to face;

Described button spring (11,15) control by described test button (17), thereby, when described test button (17) when being in rest position, described button spring (11,15) touches end (16) separately from described, and, when described test button (17) when being in active position, described button spring (11,15) contacts with the described end (16) that touches.

9. differential circuit breaker according to claim 8 is characterized in that, described button spring (11,15) and described automatic cut off device support arm (10) are made into monomer spare.

10. according to the described differential circuit breaker of claim 1 to 9, it is characterized in that, described rotating contactor (2) is contained on the rotatable support (6), described rotatable support (6) is made by insulating material, and having an outstanding tongue piece (14), described outstanding tongue piece (14) forms described every a minute member.

11. according to each described differential circuit breaker in the claim 1 to 10, it is characterized in that, described movable contactor (2) is connected to a conductor contact spring leaf (7), and described conductor contact spring leaf (7) comprises a projection, and described projection forms described automatic cut off device conductor piece.