CN103021728A

CN103021728A - Medium-voltage electric distribution apparatus

Info

Publication number: CN103021728A
Application number: CN2012103693722A
Authority: CN
Inventors: D.珀林; D.塔米西尔; F.皮蒂斯
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE; Schneider Electric Industries SAS
Priority date: 2011-09-27
Filing date: 2012-09-27
Publication date: 2013-04-03
Anticipated expiration: 2032-09-27
Also published as: CN103021728B; FR2980633B1; EP2575155B1; EP2575155A1; FR2980633A1

Abstract

The invention relates to a electric distribution apparatus comprising a circuit breaker device or interrupting device which is named as a first device, and an electric isolation device named as a second device. The first device and the second device are connected in parallel and occupying open and closed positions of a switching device. The two electric devices may use a first position and a second position. The opening and closing of the first and the second electric devices are controlled by the first electric device. When the switching device is moved from the closing position to the opening position, the contact of the isolation device is firstly opened. Arc and arc voltage generate between contacts so that current is switched to the breaker device or interrupting device. before the contact of the breaker device or interrupting device is opened, the contacts are open till the ample gap generates between contacts of the isolation device. Therefore, after contacts of two devices are closed, when transient recovery voltage is established, any subsequent dielectric breakdown at the position of the isolation device is prevented.

Description

Medium-voltage distribution equipment

Technical field

The present invention relates to a kind of medium-voltage distribution equipment, this equipment is installed between two parts of circuit, in order to carry out at least between these two parts the function of current interruptions under the current flowing and the situation in electric fault.

Background technology

The distribution board of the above-mentioned type is known, for example in patent application FR2940516.This distribution board comprises switch or circuit breaker, and it also carries out the disconnection handoff functionality, connects with this switch (or circuit breaker), comprises the selector with at least two positions, and these two positions are respectively current flowing position and earthing position.

This distribution board is designed to the electric current of conducting 630A, and therefore is unsuitable for the higher levels of current of conducting, for example 1250A.

When the rated current performance of this distribution board or any similar distribution board must increase, need large investment and excessive change operation, especially use complicated technology when these distribution boards, for example during armouring metal-insulator technology.

In addition, these distribution boards that can bear the rated electrical higher than common medium range are corresponding in the less scope that takies volume, cause the industrial cost of this transformation and improper.In the situation of vacuum circuit-breaker, the current lead-through function is very complicated and existing problems further, and this is the size reduction owing to the contact of contact box, and their high contact resistance, and the latter changes along with the quantity of performed short circuit operation.

In addition, the exploitation of this high electric current distribution board has increased the quantity of sub-component benchmark, says nothing of the improvement of all necessary peripheries that relate to the distribution board major function, namely, dielectric and electric current distribution function, the complexity of this electric function housing that need to come from casting is molded under specific circumstances.

Summary of the invention

The present invention addresses these problems and proposes a kind of simple in structure and economic distribution board, and it can bear high rated current, and needn't increase considerably required investment and the quantity of formed sub-component.

For this purpose, the switchgear that the purpose of this invention is to provide a kind of the above-mentioned type, this equipment is characterised in that it comprises current interruption or the interrupting device that is called first device, the electricity isolation device that is called the second device, they are connected in parallel, at the open position of switchgear with respectively in make position, these two electric devices can both be taked open position and make position, and the open and close of the first and second electric devices is controlled by the first electric device, and when switchgear moves to open position from make position, the contact of spacer assembly is at first opened, between its contact, produce electric arc and arc voltage, so that all redirecting to basically, electric current opens circuit or interrupting device, opening circuit or the opening before the generation of the contact of interrupting device, opening of these contacts continued, until between the contact of described disconnecting apparatus, obtain sufficient gap, so that when preventing from after the contact closure of two devices, setting up transient recovery voltage (TRR), produce thing followed electrical breakdown in the position of spacer assembly.

According to special characteristic, when moving to make position from open position, the electric device that is called first device is at first closed, and to set up current flowing by these devices, then the second electric device is closed, so that electric current distributes between above-mentioned two devices.

According to another feature, the electric device that is called first device is circuit breaker or the switch with at least two positions, these two positions are respectively make position and open position, and the second electric device is the isolating switch with at least two positions, and these two positions are respectively make position and open position.

According to another feature, above-mentioned current interruption or disconnecting apparatus comprise the contact spring, its be designed to described open circuit or the fixed contact of disconnecting apparatus and moving contact closure after pressure between fixed contact and the moving contact is provided, and the compression/de-compression phase place of these contact springs is used for activating isolating switch.

According to another feature, described current interruption or disconnecting apparatus comprise vacuum box.

According to another feature, before the contact of current interruption or disconnecting apparatus is opened, the contact spring decompresses, the contact part of its instruction the second device is opened, so that stopped and described opening circuit or the contact of interrupting device when beginning to open when this decompression phase place, the separating distance of the contact of the second device is enough to bear transient recovery voltage (TRR).

According to another feature, this switchgear comprises two different motions, be respectively applied to two electric devices, described motion is mechanically connected on the operating axis of contact of the electric device that is called first device, and two motions provide different speed reducing ratio with respect to described axle.

According to special characteristic, the driving actuating unit of isolating switch is finished, in order to simplify isolating switch rotatablely moving with respect to the operating axis of described circuit breaker.

According to another feature, the driving actuating unit of the contact of described first device is designed to increase speed reducing ratio when closing stroke finishes, and to have large angular travel when closure finishes, is used for the instruction isolating switch corresponding to the little compression travel of contact spring.

According to another feature, the increase of speed reducing ratio is to pass line by the formed assembly of the bent axle that is called three-crankshaft that will be connected in hinged way the bar that is called the second bar towards the dead point to move.

According to another feature, this equipment comprises such device, and this device is so that when the opening operation of equipment finished, operating means was opened the contact of first device, so that the rotation amplitude of isolating switch is minimum.

According to special characteristic, these devices comprise that the assembly that will comprise the bent axle that is called three-crankshaft that is connected in hinged way the bar that is called the first bar passes line towards the dead point and moves.

According to special characteristic, this equipment comprises such device, and this device is used for providing the large rotation of operating axis when the compression phase of contact spring occurs, with the closure of actuating equipment, so that the abundant rotation of isolating switch can realize, bear the required distance of transient recovery voltage to reach.

According to another feature, this equipment is by the operating means instruction, this operating means comprises the bent axle that is called the second bent axle, this second crankshaft rotating is fixed on the operating axis of the first electric device, described bent axle is connected on one of them end of the bar that is called the second bar in hinged way, another end of described the second bar is connected on one of them end of the bent axle that is called three-crankshaft in hinged way, this three-crankshaft is rotatably fixed on the axle installed of pivotal pin rotation of the 3rd fixing pivotal pin of being called of framework, and the other end of this three-crankshaft is connected on the bar that is called the first bar in hinged way, this first bar is connected on the bent axle that is called the first bent axle of the disconnecting link that supports isolating switch in hinged way through the other end, the described bent axle that is called the first bent axle is installed around the pivotal pin that is called the first fixing pivotal pin of framework with rotating freely, the rotation of described axle is prevented by releasable block sytem, when occuring with the manually or automatically opening operation at equipment, can rotate.

According to another feature, open circuit or interrupting device comprises the support bar of its moving contact, this support bar is fixedly attached on the sheath, this sheath comprises two loading ends, and the contact spring arranges around this sheath, described spring fitting is called on the one hand the first dish of top disc and is called on the other hand between the dish of bottom plate, described top disc is installed between first loading end and spring of described sheath, described bottom plate is installed between this spring and the bar, described bar is installed with respect to the bar rotation that is called the second bar and is slidingly installed around described sheath, described bar be pressed in respectively on the dish that is called bottom plate via two relative pars and the second loading end of described sheath on.

According to another feature, it is medium-voltage distribution equipment.

Description of drawings

But other advantages of the present invention and feature will clearer understandings from the detailed description that only provides with the example purpose with reference to the accompanying drawings, among the figure:

Fig. 1 schematically shows the electric switch equipment of the particular implementation according to the present invention, and described equipment is in the close position;

Fig. 2 is the view identical with last view, and this switchgear is shown in an open position;

Fig. 3 is the end view of the described switchgear of particular implementation according to the present invention, and this switchgear is in the close position;

Fig. 4 is the view identical with last view, and the part of mechanism is removed, so that clearer understanding is at the mechanical connection at contact spring position place;

Fig. 5 is the end view identical with Fig. 3, is in the make position of open position and the box of isolating switch;

Fig. 6 is the identical view of Fig. 4, is in the position of switchgear shown in Figure 5;

Fig. 7 is the identical view of Fig. 5, is in the open position of isolating switch and box;

Fig. 8 is the fragmentary, perspective view that the part of described switchgear is shown, and does not have box and isolating switch; And

Fig. 9 and 10 is two partial cross section views, and the mechanical connection between the bent axle of the support bar of moving contact of box and pole axis is shown.

Embodiment

In Fig. 1 and 2, can find out the electric multipole motor switchgear, this switchgear comprises two

distribution boards

1,2 concerning each utmost point, this two parallel installations of distribution board and be electrically connected on the first bus-bar 1a in a side, and be connected on the second bus-bar b at opposite side.

The first distribution board 1 that is arranged in the figure right side comprises vacuum circuit-breaker 3 in this particular implementation, and this vacuum circuit-breaker 3 comprises vacuum box 4, and vacuum box 4 is connected with isolating switch 5, and this isolating switch has two positions, is respectively make position and earthing position.

The second distribution board that is positioned at the left side of the first distribution board comprises isolating switch, and this isolating switch has two positions, is respectively closed path flow locations and open position.

These two distribution board mechanical connections, in order to follow specific order, this will describe in detail below.

In Fig. 1, equipment is in the close position, because circuit breaker and isolating switch are closed, and two closings of circuit, rated current is distributed in two distribution boards.

In order to move to open position, the isolating switch 5 of the second distribution board at first must be opened, so that circuit all redirect to the circuit breaker 3 of the first distribution board.

When this opens generation, need to reach the contact 6 of

isolating switch

5,7 ample clearance distance, so that when the

contact

8,9 that opens circuit begins to separate thus turn-off current, when setting up transient recovery voltage, do not have thing followed dielectric breakdown in the position of isolating switch.

On the contrary, when generation moved to make position, the first vacuum box 4 must be closed, in order to set up the electric current that flows through these devices, and isolating switch 5 then must be closed, is used for electric current is assigned to two

distribution boards

1,2.

Equipment according to the present invention has operating means to control, this operating means so that the

vacuum box

4 and 6 of

isolating switch

5,7

contact

8,9 can the person of being operated individual part drive, in order to guarantee the aforesaid operations step.

In Fig. 3 to 7, comprise that the isolating switch 5 of the disconnecting link 10 that moving contact and the fixed leg 11 that represents fixed contact consist of illustrates in the left side of figure.

This disconnecting link 10 is supported by bent axle 12, and this bent axle 12 is known as the first bent axle, and it cooperates around the pivotal pin (X) that is called the first fixing pivotal pin with rotating freely, and this pivotal pin belongs to the framework of equipment.

Circuit breaker box 4 illustrates on the right side of figure, described box comprises the shell of substantial cylindrical in known manner, this shell comprises the fixed contact 8 of fixing with respect to described shell and the moving contact 9 that is supported by bar 13, this moving contact is removable along the axis of described box, described bar 13 comprises contact pad 14 at the one end, and be mechanically connected on the bent axle 15 that is called the second bent axle through its opposite end, this second bent axle is fixedly attached on the operating axis of the axle A that is called pole axis or box, described axle supports the bent axle of specific quantity, and this quantity is corresponding with the quantity of the utmost point of switchgear.This pole axis A cooperates around pivotal pin Y with rotating freely, and this pivotal pin Y fixes with respect to the framework of switchgear.

These are called in the bent axle of the second bent axle 15 each and comprise with the fixing end 15a of pole axis rotation and be mechanically connected to opposite end 15b on the control lever of moving contact of equipment.For this purpose, form in the opening that hinged these ends that are engaged in bent axle 15 of bar 16 of local toggle (toggle joint) arrange, this bar 16 comprises two

relative par

16a, 16b, sheath 17 is slidingly mounted on the inboard of this bar 16, and pass this bar, this sheath 17 comprises the [Dan 18 of a taper, and the control lever 13 of the moving contact 9 of box 4 is fitted in this 18 inboards, hole and screw threads for fastening.Can find out that also this sheath 17 is included in two parts 19,20 that two relative end forms respectively two

loading ends

21,22 magnifying diameter.

Also be combined with the dish that is called the first dish 23 around this sheath 17, this dish comprises surperficial 23a, this surface pressure is at the above-mentioned loading end 21 of sheath 17, in 22 one is called on first the surface 21, another surperficial 23b of dish is as loading end, one of them the end 24a that is used for contact spring 24, this contact spring 24 is pressed on the dish that is called the second dish 25 of sheath 17 installations via its relative end 24b, and be pressed on the 16a in the par of above-mentioned toggle, and another par 16b of toggle is designed to be pressed on the loading end that is called the second loading end 22 of sheath.

The bent axle that is called the first bent axle 12 passes through the mechanical component mechanical connection with the bent axle that is called the second bent axle 15, this mechanical component comprises the bar that is called the first bar 25, this first bar is connected on the bent axle that is called the first bent axle 12 via one end thereof in hinged mode, and be connected on one of them end of the bent axle that is called three-crankshaft 26 in its relative end, this three-crankshaft 26 fixedly secures on axle, this axle is installed around the pivotal pin rotation that is called the 3rd pivotal pin Z, and the 3rd pivotal pin Z fixes with respect to the framework of equipment.This bent axle that is called three-crankshaft 26 also is connected on one of them end of the bar that is called the second bar 27 in hinged way via its other end, this second bar is connected in hinged way via its other end on the bent axle that is called the second bent axle 15, and this second bent axle 15 is fixedly attached on the pole axis A.

Describe with reference to the accompanying drawings previously described and corresponding to the mode of operation of the operating means of the electric switch equipment of particular implementation of the present invention.

In Fig. 3 and 4, operating means is in the close position, and the disconnecting link 10 of this isolating switch 5 closes on the fixed leg 11, and the fixed contact 8 of box 4 and moving contact 9 closures.In this position, the operating axis A of circuit breaker 3 is blocked the locking of institute of system, this block sytem prevents the operating axis A of this circuit breaker owing to unshowned effect of opening spring is driven in rotation, and it is equipped around contact spring 24 that this opens spring, and these springs also are pressed on the above-mentioned bottom plate 25.In this position, the mechanism of contact spring 24 and circuit breaker 3 to open spring compressed, and the bent axle that is called the second bent axle 15 is in upper position.

When opening operation occurs when, the locking device of the operating axis A of circuit breaker 3 is disengaged, this causes contact spring 24 to decompress in the phase I, and simultaneously drive the bent axle that is called the second bent axle 15 that they press and turn clockwise via being pressed in the dish that is called bottom plate 25 on the toggle 16, this toggle 16 is fixedly attached on the bent axle that is called the second bent axle 15.By means of the bar that is called the second bar 27, this bent axle that is called three-crankshaft 26 that causes being fixedly attached on the operating axis turns clockwise, cause thus being called the bar of the first bar 25 and the rotation of supporting the bent axle that is called the first bent axle 12 of disconnecting link 10, this clockwise rotation causes the part of the moving contact 10 of isolating switch 5 to be opened thus.This local open position at the isolating switch 5 shown in Fig. 5 and 6, the separating distance of isolation switch contact is enough to keep transient recovery voltage, and this is the voltage of setting up at the end of the contact of isolating switch and is the voltage of setting up at the end of box when electric equipment closed occurs subsequently.In this rotary course of the bent axle that is called the second bent axle 15, these bent axles also do not drive the driving of the moving contact 8 of box and do 13, in this motion process, spring 24 driving-disc 25 along sheath 17 translations, this dish 25 has been delivered to bar 16 with this motion, but this assembly is mobile, and not have arrival to be positioned at the bottom of sheath and by the formed edge of the loading end that is called the second loading end 22 of sheath 16.In this stage of the operation of mechanism, also be pressed in opening spring and will taking over and drive in the clockwise direction pole axis A and bent axle 15 of mechanism on the dish that is called bottom plate 25, this causes the motion of bar 13, and therefore causes the

contact

8,9 of box 4 to open position as shown in Figure 7.

This motion of bent axle will be delivered to by means of previously described motion the disconnecting link of isolating switch.

When the reversed closed operation of generation, the closing spring of mechanism drives in the counterclockwise direction pole axis A and is called the bent axle of the second bent axle 15, and this causes the second loading end 22, bar 16 and bottom plate 25 compression contact springs 24 via sheath 17.Then closing force is delivered to the drive rod 13 of the moving contact 9 of box 4 via another loading end 21 of the dish that is called top disc 23 and sheath 17 by these springs 24.This of these bent axles 15 rotatablely moves and also causes the counter clockwise direction rotation of the bent axle that is called three-crankshaft 27 by means of the rod guidance that is called the second bar 27, and cause the counter clockwise direction rotation of the bent axle that is called the first bent axle 12 by means of the rod guidance that is called the first bar, this causes the contact 8 of

isolating switch

5,9 closure, the position shown in Fig. 3 and 4.

The length of bar and bent axle is so selected, so that in this compression phase process of contact spring 24, the rotation of operating axis A so that the abundant rotation of the moving contact of isolating switch 5 can realize, reaching the distance that must reach when opening, in order to keep transient recovery voltage.

Especially in Fig. 3, be appreciated that the contact 8 that opens circuit, 9 actuation movement mechanism realize, to increase the closed speed reducing ratio that forms when finishing.This produces the motion of passing line L towards the dead point and is achieved by being called the bar of the second bar 27 and being called when closure finishing between the bent axle of three-crankshaft 26.

The actuation movement mechanism of isolating switch 5 by simplifying this wide-angle stroke of pole axis, is achieved so that the rotation of isolating switch can stand transient recovery voltage.

When the opening operation of isolating switch 5 finishes, these motions are so realized, that is: when opening operation finishes, also pass line M near the dead point that is called the bent axle of three-crankshaft 26 and be called between the bar of the first bar 25, so that so that control device can be opened the contact that opens circuit, so that the rotation of isolating switch is minimum.This dead point is passed the isolating switch 5 that line also is and can leniently be stopped, and prevents that thus the latter from opening thermal agitation when finishing, and this can open harmful the rotatablely moving that cause control device when finishing.

The operation of the apparatus according to the invention device is designed thus, so that realize two kinds of different motions for every kind of electric device, each device for mechanical is connected on the output shaft of operating means of circuit breaker, speed reducing ratio is different between two motions, and these speed reducing ratio are recently determined by the length between different bars and the bent axle.

The present invention can realize such mechanical device thus, this mechanical device so that tripper and disconnecting apparatus can be arranged in parallel, in single operation, to be handled, the disconnecting apparatus of this device must at first be opened, in order to all electric currents are redirect to tripper, and the disconnecting apparatus of this device must be last closed, because this is avoided having the manufacturing capacity, in order to shift the one part of current of tripper after the closure of circuit has been carried out by disconnecting apparatus.This device is so that the sufficient clearance distance of disconnecting apparatus can be guaranteed that to begin keeping transient recovery voltage before the operation at the contact that opens circuit, this is to realize by the compression/de-compression phase place of utilizing the contact spring that triggers isolating switch.

This equipment so that two electric devices can by one with respect to another staggered operation the aspect the open and close, have such motion, that is, the formed motion of pivot link can not interrupted (not having the space of non-loaded stroke), therefore, can not produce any impact.

This equipment so that two electric devices can one with respect to other functional interleaving, this by rigidity and reliably the motion link guarantee.

This equipment can also guarantee the state of two kinds of different electric devices be consistent (not opening another for can not open).

This has guaranteed that the position of two electric devices is with respect to the ipsec reliable mode IPSEC of the position of control system.

Various improvement all are possible naturally.The quantity of module is not limited to three.The present invention also used the two poles of the earth, four utmost points or even sextupole or ends of the earth box, driving mechanism can be any type, the utmost point has different closures and opens spring, has single spring or has the single spring that can be closed and opens.

Claims

1. controller switching equipment, this controller switching equipment is designed to be installed between two parts of circuit so as to carry out at least between these two parts streaming current and in the electric fault situation function of interruptive current,

It is characterized in that, it comprises electrical open or the interrupting device that is called first device (3), and the electricity isolation device (5) that is called the second device, first device and the second device are in parallel, respectively in open position and the make position of switchgear, two electric devices can both be taked primary importance and the second place, the open and close of the first and second electric devices is controlled by the first electric device (3), and when switchgear moves from closing device to device for opening, the contact (6 of spacer assembly (5), 7) at first open, between its contact, produce electric arc and arc voltage, so that all being diverted into basically, electric current opens circuit or interrupting device (3), opening circuit or the contact (8 of interrupting device (3), 9) open before, opening of these contacts is lasting, until between the contact of described spacer assembly, obtain the ample clearance, after the contact closure with two devices of box lunch, when setting up transient recovery voltage, prevent any thing followed dielectric breakdown in the position of spacer assembly.

2. equipment as claimed in claim 1, it is characterized in that, it comprises following device, this device when moving from open position to make position at first closure be called the electric device of first device (3), in order to set up the current flowing by these devices, and closed the second electric device (5) then, so that electric current is dispensed in above-mentioned two electric devices (3,5).

3. equipment as claimed in claim 1 or 2, it is characterized in that, the described device that is called first device is formed by circuit breaker or switch (3) with at least two positions, described two positions are respectively closing device and device for opening, and the second electric device is formed by isolating switch (5), it has at least two positions, is respectively make position and open position.

4. such as each described equipment in the claims 1 to 3, it is characterized in that, above-mentioned current interruptions or tripper (3) comprise contact spring (24), this contact spring is designed to provide contact between these contacts after the fixed contact of described interruption or tripper (3) and moving contact (8,9) closure, and the compression/de-compression phase place of these contact springs (24) is used for triggering isolating switch (5).

5. such as each described equipment in the above-mentioned claim, it is characterized in that described current interruptions or tripper (3) comprise vacuum box (4).

6. such as claim 4 or 5 described equipment, it is characterized in that, it comprises control device, this control device is by the decompression institute instruction of contact spring (24), and before the contact (8,9) of current interruptions or tripper (3) is opened, the contact of these control device instruction the second devices (5) is opened a part, so that stopped and described opening circuit or the contact (8,9) of interrupting device (3) when beginning to open when this decompression phase place, the distance of separating the contact (6,7) of described the second device (5) is enough to bear transient recovery voltage.

7. such as each described equipment in the above-mentioned claim, it is characterized in that, two electric devices (3,5) had respectively two different motions, described motion is mechanically connected on the operating axis A of contact of the electric device that is called first device (3), and these two motions provide different speed reducing ratio with respect to described axle.

8. such as each described equipment in the claim 3 to 7, it is characterized in that, two electric devices (3,5) had respectively two different motions, described motion is mechanically connected on the operating axis A of contact of the electric device that is called first device (3), these two motions provide different speed reducing ratio with respect to described axle, and the actuation movement mechanism of isolating switch (5) is implemented as and simplifies isolating switch (5) rotatablely moving with respect to the operating axis A of circuit breaker.

9. such as claim 7 or 8 described equipment, it is characterized in that, it comprises following device, the assembly that this device forms for the bent axle (26) that will be called three-crankshaft passes line L and moves towards the dead point, this three-crankshaft (26) is connected on the bar that is called the second bar (27) in hinged way, when closing stroke finishes, increase thus speed reducing ratio, when closure finishes, have large angle and form, be used for instruction isolating switch (5) corresponding to the little compression travel of contact spring (24).

10. such as each described equipment in the claim 7 to 9, it is characterized in that, it comprises following device, this device comprises that for mobile the bent axle that is called three-crankshaft (26) passes line L and moves towards the dead point, so that when the opening operation of equipment finishes, operating means is opened the contact (6,7) of first device (3), so that the rotation amplitude of isolating switch (5) is minimum, wherein said three-crankshaft (26) is connected on the bar that is called the first bar (25) in hinged way.

11. as each described equipment in the above-mentioned claim, it is characterized in that, it is by the operating means instruction, this operating means comprises the bent axle that is called the second bent axle (15), this second bent axle (15) is rotatably fixed on the operating axis A of the first electric device (3), described bent axle (15) is connected on one of them end of the bar that is called the second bar (27) in hinged way, another end of described bar (27) is connected on one of them end of the bent axle that is called three-crankshaft (26) in hinged way, this three-crankshaft (26) is rotatably fixed on the axle of the pivotal pin rotation installation of the 3rd fixing pivotal pin Z of being called of framework, and the other end of this three-crankshaft (26) is connected on the bar that is called the first bar (25) in hinged way, this first bar (25) is connected on the bent axle that is called the first bent axle (12) of the disconnecting link (10) that supports isolating switch (5) in hinged way through the other end, the described bent axle that is called the first bent axle (12) is installed around the pivotal pin that is called the first fixing pivotal pin X of framework with rotating freely, the rotation of described axle is prevented by releasable block sytem, when occuring with the manually or automatically opening operation at equipment, can rotate.

12. as each described equipment in the above-mentioned claim, it is characterized in that, it is by the operating means instruction, this operating means comprises the bent axle that is called the second bent axle (15), this second bent axle (15) is rotatably fixed on the operating axis A of the first electric device (3), described bent axle (15) is connected on one of them end of the bar that is called the second bar (27) in hinged way, another end of described the second bar (27) is connected on one of them end of the bent axle that is called three-crankshaft (26) in hinged way, this three-crankshaft (26) is rotatably fixed on the axle of the pivotal pin rotation installation of the 3rd fixing pivotal pin Z of being called of framework, and the other end of this three-crankshaft (26) is connected on the bar that is called the first bar (25) in hinged way, this first bar (25) is connected on the bent axle that is called the first bent axle (12) of the disconnecting link (10) that supports isolating switch (5) in hinged way through the other end, the described bent axle that is called the first bent axle (12) is installed around the pivotal pin that is called the first fixing pivotal pin X of framework with rotating freely, the rotation of described axle is prevented by releasable block sytem, when occuring with the manually or automatically opening operation at equipment, can rotate; And it comprises such device, this device is used for providing the large rotation of operating axis A when the compression phase of contact spring (24) occurs, with the closure of actuating equipment, so that isolating switch (5) can be realized abundant rotation, bear the required distance of transient recovery voltage to reach.

13. as each described equipment in the above-mentioned claim, it is characterized in that, described current interruption or interrupting device (3) comprise the support bar (13) of its moving contact (9), this support bar (13) is fixedly attached on the sheath (17), this sheath (17) comprises two loading ends (21,22), and contact spring (24) arranges around this sheath, described spring (24) is installed in the first dish (23) that is called on the one hand top disc and is called on the other hand between the dish of bottom plate (25), described top disc is installed between first loading end (21) and spring (24) of described sheath (17), described bottom plate is installed between this spring (24) and the bar (16), described bar (16) is installed with respect to the bar rotation that is called the second bar (27) and is slidingly installed around described sheath (17), and described bar (16) is via two relative par (16a, 16b) be pressed in respectively on the dish that is called bottom plate (25) and second loading end (22) of described sheath (17) on.

14. such as each described equipment in the above-mentioned claim, it is characterized in that it is medium-voltage distribution equipment.