CN1144969A

CN1144969A - Medium voltage gas isolation circuit breaker

Info

Publication number: CN1144969A
Application number: CN 96107667
Authority: CN
Inventors: 丹尼斯·拉法德; 雷蒙德·索博尔
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 1995-06-12
Filing date: 1996-06-12
Publication date: 1997-03-12
Anticipated expiration: 2016-06-12
Also published as: FR2735277A1; DE69606465D1; CN1068963C; ES2142561T3; EP0749139A1; FR2735277B1; EP0749139B1

Abstract

Disclosed is a gas isolation circuit breaker, comprising a main circuit having main contacts (20, 22) and an assistant circuit which is arranged in a flameout chamber (34) and is provided with electric arc contacts (36, 38). To facilitate the assembly, the flameout chamber (34) comprises an insulated bracing arm (62) which is provided with an articulated mandrel (64) in a notch (78) of a first support (26) which is arranged in a movable main contact (22), and at least one permanent joint (66) which is arranged at the opposite side of the mandrel (64) and connected with a a bolt (76) to fixed the flameout chamber on the shell (12).

Description

Volt circuit circuit breaker in the gas barrier

The present invention relates to a kind of multipole middle volt circuit circuit breaker that is contained in the insulation crust of filling high dielectric strength gas, comprising:

One main circuit of every utmost point, this main circuit comprise a disconnecting apparatus that is made of fixing main contact and movable main contact, and these two contacts are imported sleeve with a pair of electric current and are electrically connected;

One auxiliary circuit of every utmost point, this auxiliary circuit comprise a flame-out chamber, fixed arc contact that useful electrical connector is connected with fixedly main contact and movable main contact respectively in this flame-out chamber and movable arc contact;

And each extremely common operating mechanism, be used for the arc contact that before main contact closes, closes, and after described main contact is opened, open described arc contact.

Document FR-A-2,677,168 pairs of sort circuit circuit breakers are described, and flame-out chamber wherein is made of a self-expanding box that communicates with enclosure or a vacuum seal box.Different according to supply power voltage, rated current and interrupting capacity, available multiple device forms the circuit-breaker of multiple size.The suitable flame-out chamber that each device correspondingly has the main circuit of specific dimensions and must carry out machinery and be electrically connected, the manufacturing of so multiple circuit-breaker and production management complexity, and cost height.

The manufacturer's standardization of volt circuit circuit breaker in the objective of the invention is to make, and improved

Circuit-breaker of the present invention is characterised in that, each flame-out chamber comprises an insulation support arm, the hinged axle of one recess of first bearing that is arranged in movable main contact is housed on it, and at least one permanent joint, it is relative with axle, and by the screw connection, so that described flame-out chamber is fixed on the shell.

Recess on the movable main contact bearing remains unchanged with relative vertical position between the joint that is fixed on the shell, has nothing to do with the type of flame-out chamber and disconnecting apparatus.Select flame-out chamber and disconnecting apparatus in the time of can in factory, assembling at last for use, thereby simplify production management.

According to a feature of the present invention, screw the mechanical connection that screw can be finished flame-out chamber installing and fixing the joint, and make it simultaneously to be electrically connected with the input current end.

According to a preferred embodiment of the present invention, the movable main contact of the disconnecting apparatus that links to each other with main circuit comprises the contact folder of the end portion supports of a pair of parallel bifurcated by the first U-shaped bearing, and each contact folder and the conduct fixedly contact chip on first inverse-U-shape rack of main contact cooperate.

According to another feature of the present invention, the movable main contact of main circuit is a Modular, and comprises second support and/or the folder of the contact on the 3rd support that at least one pair of other width that is positioned at the described first support periphery increases.Fixedly main contact comprises second support and/or the 3rd support in the face of the folder of the contact on the second and/or the 3rd bearing.

According to the present invention, each contact folder comprises:

The a pair of conductive vanes that links with the elastic device that the contact pressure spring is housed;

Be used to insert first hole as the crank-pin of the hinged axle of movable main contact;

Second hole of the connecting rod that connection links to each other with operating mechanism;

The 3rd hole that spring and a pair of assembling support ring are passed.

By below in conjunction with the explanation of accompanying drawing to a non-limiting example, other advantage of the present invention and feature will be clearer.In the accompanying drawing:

Fig. 1 is the constructed profile of circuit-breaker of the present invention, and contact is in open mode among the figure;

Fig. 2 opens end view behind the lid for Fig. 1, and right hand side pole illustrates the main circuit that removes behind the flame-out chamber, and interpole illustrates flame-out chamber, and the left hand side pole is empty;

Fig. 3 is the front view of the flame-out chamber of Fig. 1;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 and 7 same Fig. 3 illustrate two other embodiment;

Fig. 6 and 8 is the vertical view of Fig. 5 and 7;

Fig. 9 briefly shows dissimilar flame-out chambers and the relative position between the permanent joint on the outer casing inner wall;

Figure 10 is the installation diagram of the amplification of flame-out chamber;

Figure 11 is the front view of the main circuit of rated current minimum, and main contact is in open mode among the figure;

Figure 12 is the stereogram of Figure 11 main circuit;

Figure 13 and 15 same Figure 11, but rated current is bigger;

Figure 14 and 16 is the stereogram of main circuit shown in Figure 13 and 15;

Figure 17 is the exploded perspective view of the contact folder of disconnecting apparatus;

Figure 18 is the profile at this contact folder middle part.

In Fig. 1, press in one the utmost point of three-pole circuit circuit breaker 10 to be contained in one and fill high dielectric strength gas, particularly sulphur hexafluoride SF ₆Insulation crust 12 in.This utmost point comprises a pair of

sleeve

14,16, as the lug plate of electric current input, so that electric current flows through this circuit-breaker.

Sleeve

14,16 is directly connected to the disconnecting apparatus 18 of main circuit 19, this disconnecting apparatus is included in the fixedly main contact 20 that shell 12 interior usefulness screws 21 are fastened to first sleeve, 14 the inners, and one can be fastened on second sleeve 16 around movable main contact 22, the first bearings 26 usefulness hold-down screws 28 that pivotally is installed on the axle 24 of first bearing 26.

Shell 12 comprises usefulness lid 30 flanges that cover 29, between flange 29 and the lid 30 sealing ring 32 is housed.The auxiliary circuit of flame-out chamber 34 is positioned at shell 12, should in the flame-out chamber 34 a pair of arc contact 36,38 be arranged, wherein movable contact 38 is installed between closed position and the open position, can do longitudinal sliding motion, in closed position, it cooperates with fixed arc contact 36, and at open position, it separates with arc contact 36.

Arc contact 36,38 usefulness the bonding conductors 40 of flame-out chamber 34 and one weave bus 42 and are electrically connected with

sleeve

14 and 16 respectively and form a circuit in parallel.When closed position, arc contact 36,38 constitutes the shunt of

main contact

20,22.

In example shown in Figure 1, this flame-out chamber 34 is made of a box of self-expanding and/or the rotary electric-arc distinguishing device of electric arc.This box communicates with the inner space of shell 12 by the movable arc contact 38 of tubulose.

Also the vacuum available box replaces the box 43 among Fig. 1, and this vacuum box have one with fill SF ₆The airtight housing of shell 12.

Available one tightly passes the wall of shell 12 and the rotating shaft 44 that is external to an operating mechanism (not shown) drives movable main contact 22 and movable arc contact 38.In shell 12 inside, axle 44 is with a crank 46 at each utmost point place.

Crank 46 usefulness first connecting rods 48 link to each other with movable main contact 22, and link to each other with movable arc contact 38 with second connecting rod 50.Crank 46 is to put 51 drive link 48,50, and these parts are assembled into the arc contact 36,38 that closes earlier, and

main contact

20,22 can close; Open

main contact

20,22 earlier, can open arc contact 36,38.

This operation of then opening arc contact 36,38 of closing earlier is that those skilled in the art are known, repeats no more here.

In Fig. 2, axle 44 is that all are three extremely common, and it passes across the midfeather 52,54 between three adjacent compartments 56,58,60 of three utmost points.Right hand side pole shows and removes flame-out chamber 34 and cover the disconnecting apparatus 18 that is contained in the main circuit in the compartment 60 after 30.Intermediate compartment 58 shows the flame-out chamber 34 that is contained in axle 44 tops.Left-hand side compartment 56 is all removed empty because of disconnecting apparatus and corresponding flame-out chamber.Obviously, the electric equipment of each compartment 56,58,60 is identical, and with shown in Figure 1 extremely corresponding.

In Fig. 3 and 4, flame-out chamber 34 comprises a lower support arm 62 perpendicular to the longitudinal axis of box 43, and hinged axle 64 is equipped with in its end.Box 43 also has a pair of permanent joint 66 in vertically relative with arm 62 side.

Fig. 5 and 6 illustrates its interrupting capacity flame-out chamber 34A bigger than the flame-out chamber 34 of Fig. 3 and 4.Width between the two relative side 68,70 of box 43A is bigger than aforementioned box 43.Fore-and-aft distance L between axle 64 and the joint 66 ₁And the lateral separation L between hinged axle 64 and the box 43A longitudinal axis ₂All remain unchanged.

In Fig. 7 and 8, flame-out chamber 34B has maximum breaking capacity, and the size of box 43B is bigger than the box 43A in Fig. 5 and 6.Distance L ₁And L ₂Identical with box 43 and 43A.

The square cross section that the vertical view of Fig. 9 illustrates different flame-out chambers 34,34A, 34B increases gradually.Between the space bit of permanent joint 66 no matter be that any flame-out chamber all remains unchanged.Each permanent joint 66 all is drilled with a hole 72 of aliging with the conical socket 74 on insulation crust 12 housings.One rigging screw 76 is passed the hole 72 of each joint 66 and is screwed in this jack 74.

In Figure 10, the hinged axle 64 of support arm 62 is packed in the U-shaped recess 78 in the horizontal extension portion 80 of bearing 26 of movable main contact 22.The middle part of bonding conductor 40 is inserted between the shoulder of each joint 66 and shell 12, and the dististyle of conductor 40 is connected on the main circuit by the screw 21 that fixing main contact 20 is fixed on the sleeve 14.

On relative one side, bus 42 is connected on the middle conductor 82, and its dististyle is pressed onto on bearing 26 bases with screw 28.

Main circuit 19 comprises disconnecting apparatus 18 shown in Figure 11 and 12, this device comprises two identical contact folders 84, the contact folder forms movable main contact 22, and the

contact chip

90,92 of main contact 20 cooperates contact folder 84 with forming fixedly by the end portion supports of two parallel bifurcateds 86,88 of bearing 26.

Contact chip

90,92 is arranged in the end of the first U-shaped support 94, and the base of U-shaped support is fixed on the sleeve 14 with screw 21, and each folder 84 usefulness crank-pin 96 is hinged on the corresponding bifurcated 86,88.The structure of folder 84 describes in detail in conjunction with Figure 17 and 18 below.Main circuit 19 is applicable to the circuit-breaker of minimum rated current shown in Figure 11 and 12.

If rated current is bigger, then must use main circuit 19A (Figure 13 and 14) with four folders 84.The circuit of two therebetween 84 is with identical shown in Figure 11 and 12, but two outside 84 second bearing 26A by the broad that is positioned at first bearing, 26 peripheries that press from both sides support.These two outside folders 84 cooperate with the contact chip 90A, the 92A that are fastened to than on the second wide support 94A of first internal stent 94.

Figure 15 and 16 illustrates the main circuit 19B that has six folders 84 corresponding to one of the maximum rated current of circuit-breaker.Circuit with four therebetween 84 is identical with Figure 13 and 14, and two outside folders 84 are supported by the 3rd bearing 26B wideer than the second bearing 26A and cooperate with contact chip 90B, the 92B at the place, the 3rd support 94B end that is positioned at the second support 94A periphery.

Be parallel to each other bifurcated 86,86A, the 86B of three supports 26,26A, 26B; 88, the length of 88A, 88B is identical, is positioned on the same level height thereby respectively press from both sides 84 after each common center line overlaps.The situation of each bifurcated of three

supports

94,94A, 94B is identical therewith.

When factory assembles, for satisfying the performance requirement of circuit-breaker, especially consider rated current and interrupting capacity, can from flame-out chamber 34,34A or 34B and

main circuit

19,19A or 19B, select, to obtain to be suitable for the particular combinations of each device technology requirement.

For example, if rated current is 1200A (Fig. 2), then can select three main circuits 19 shown in the flame-out chamber 34 of three shown in Fig. 3 and 4 and Figure 11 and 12 for use.

If the medium rated current of circuit-breaker reaches 2500A, then can use shown in Fig. 5 and 6 three main circuit 19A shown in three flame-out chambers and Figure 13 and 14.

If maximum rated current reaches 3200A, the main circuit 19B of flame-out chamber 34B and Figure 15 and 16 shown in Fig. 7 and 8 need be used in combination.

The concrete size of shell 12 depends on the combination of selected flame-out chamber and main circuit, thereby can use standarized component to obtain the circuit-breaker of various sizes as much as possible.

During wiring harness circuit breaker 10, at first bearing 26,26A, 26B and

support

94,94A, 94B are installed on the

sleeve

14,16, flame-out chamber 34 is installed then with screw.The hinged axle 64 of support arm 62 is packed behind the corresponding recess 78 into rotation box 43 and make permanent joint 66 withstand the inwall of shell 12.Carry out mechanical connection and fixed contact 36 is electrically connected with sleeve 14 with screwing screw 76 chamber of will stopping working.Must be connected with 38 movable contact 22 with power transmission shaft 44 with connecting rod 48,50 then.

Can find out by Figure 17 and 18, each contact folder 84 of disconnecting apparatus 18 comprises a pair of blade 100,102, be used to keep in touch the elastic device 104 of pressure and make the two over against, first hole 106 and second hole 108 that is used to be connected connecting rod 48 that have the crank-pin 96 for the hinged axle 24 of movable main contact 22 to insert on each blade 100,102.This elastic device 104 comprises a compression spring 110, and it is along passing the 3rd hole 112 perpendicular to the direction of blade 100,102.With two with concentric assembling support ring 114, the 116 assembling springs 110 in the 3rd hole 112 to guarantee the precommpression of spring 110.On each support ring 114,116 two lock pawls relative on diametric(al) 118,120 are arranged, these lock pawls pass 112 backs, hole and cooperate with two grooves 122,124 of blade 100,102 when direction shown in the arrow A is moved for the first time in Figure 17, then in motion for the second time, rotate 1/4 circle along direction shown in the arrow B lock pawl 118,120 is locked on the inclined-plane of blade rear surface (seeing Figure 18).

Claims

1, a kind ofly be contained in one and fill volt circuit circuit breaker in multipole in the insulation crust (12) of high dielectric strength gas, comprising:

One main circuit of every utmost point (19,19A, 19B), this main circuit comprise a disconnecting apparatus (18) that is made of fixedly a main contact (20) and a movable main contact (22), and these two contacts are imported sleeve (14,16) with a pair of electric current and are electrically connected;

One auxiliary circuit of every utmost point, this auxiliary circuit comprise a flame-out chamber (34,34A, 34B), fixed arc contact (36) that useful electrical connector is connected with fixedly main contact (20) and movable main contact (22) respectively in this flame-out chamber and movable arc contact (38);

And each extremely common operating mechanism, be used for the arc contact (36,38) that before main contact (20,22) closes, closes, and after described main contact is opened, open described arc contact,

It is characterized in that, each flame-out chamber (34,34A, 34B) comprises has one to be contained in the insulation support arm (62) of the hinged axle (64) in the recess (78) of first bearing (26) of movable main contact (22) on it, and is positioned at this axle (64) and connects described flame-out chamber is fixed at least one permanent joint (66) on the shell (12) relatively on one side and by screw (76).

2,, it is characterized in that fixed arc contact (36) is electrically connected with fixing main contact (20) with the bonding conductor (40) between the shoulder that is inserted in permanent joint (66) and shell (12) in the middle part of it by the described circuit-breaker of claim 1; And movable arc contact (38) is electrically connected with bearing (26) with a fexible conductor, particularly a braiding bus (42).

3, by the described circuit-breaker of claim 1, it is characterized in that, the movable main contact (22) of the disconnecting apparatus (18) that links with main circuit (19) comprises the contact folder (84) of the end portion supports of a pair of parallel bifurcated by the first U-shaped bearing (26) (86,88), each folder (84) with cooperate as a part of contact chip (90,92) of first inverse-U-shape rack (94) of fixing main contact (70).

4, by the described circuit-breaker of claim 1, it is characterized in that, the movable main contact (22) of main circuit (19A, 19B) is a standard component, and comprises second bearing (26A) of the width increase that is positioned at described first bearing (26) periphery and/or the other at least a pair of contact folder (84) on the 3rd bearing (26B).

5, by claim 3 or 4 described circuit-breakers, it is characterized in that, fixedly main contact (20) comprise with the above-mentioned second and/or the 3rd bearing (26A, 26B) on contact press from both sides second support (94A) and/or the 3rd support (94B) that (84) are faced.

6, by the described circuit-breaker of claim 5, it is characterized in that, the same length of the parallel bifurcated of all bearings (26,26A, 26B), thus each folder (84) is positioned on the same level height.

By the described circuit-breaker of claim 1, it is characterized in that 7, the recess (78) of packing into wherein for hinged axle (64) is positioned in the horizontal extension portion of first bearing (26).

By one of claim 3 to 7 described circuit-breaker, it is characterized in that 8, each contact folder (84) comprising:

The a pair of conductive vanes (100,102) that links with the elastic device (104) that contact pressure spring (110) are housed;

One can make movably first hole (106) of crank-pin (96) insertion of the hinged axle (24) of main contact (22) of conduct;

Be used to connect second hole (108) of the connecting rod that links to each other with operating mechanism;

The 3rd hole (112) that spring (110) and a pair of assembling support ring (114,116) are passed.

9, by the described circuit-breaker of claim 8, it is characterized in that, on each assembling support ring (114,116) two lock pawls relative on diametric(al) (118,120) are arranged, these two lock pawls when doing to move for the first time can and two grooves (122,124) of blade (100,102) cooperate, rotate 1/4 circle then and these lock pawls be locked on the inclined-plane of paired blade can make spring (110) precommpression.