CN1272817C

CN1272817C - Electrical cutoff and sectioning equipment comprising a vacuum bulb

Info

Publication number: CN1272817C
Application number: CN 02813593
Authority: CN
Inventors: 菲利普·皮科特; 伯纳德·伊瓦斯
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE; Schneider Electric Industries SAS
Priority date: 2001-07-05
Filing date: 2002-06-06
Publication date: 2006-08-30
Anticipated expiration: 2022-06-06
Also published as: CN1524278A; FR2827075A1; FR2827075B1; EP1402549A1; WO2003005394A1

Abstract

The invention relates to a switch disconnector comprising a vacuum bulb (12) which is formed by a sealed enclosure (18), two screens (28, 30) which are fixed in relation to the enclosure, a contact (52) which is fixed in relation to the equipment support (16) and a movable contact (62) which is driven by a drive mechanism. The movable contact (62) moves rapidly between a contact position and a cutoff position, thereby opening the switch. In the cutoff position, the contacts (52, 62) project out towards each other in relation to the screens (28, 30) such that the screens are not affected by the electric arc during the cutoff. The movable contact (62) can be driven at a low speed from the cutoff position to a sectioning position. In said phase, the enclosure (18) is solidly connected to the movable contact using coupling means (74) in such a way that the enclosure (18) moves in relation to the fixed contact (52). In the sectioning position, the contacts (52, 62) are recessed relative to the screens (28, 30).

Description

Comprise the outage of vacuum box and cut off switching device

Technical field

The present invention relates to a kind of switching device that comprises at least one vacuum box, it is carried out band year cut-out function (switch or circuit breaker) and cuts off function.

Background technology

Vacuum box is used for circuit breaker or contactor purposes as tripper usually in middle pressure field.On the other hand, they are difficult to cut off purposes, because be difficult to guarantee the higher and reliable dielectric strength between the contact of vacuum box.Although vacuum is the good insulation performance medium, and after new box is through the step that is called voltage-regulation, can obtain very high dielectric strength, but, this dielectric strength is easy to be subjected to very big weakening owing to the influence of the operation (no-load, band carry or failure condition) that this box carries out.These operations will cause changing the surface state of contact, promptly increase roughness: owing to the influence of mechanical closure-opening operation or owing to the effect of arc that produces when band carries work makes the surface of contact bossy body occur, this bossy body will make and produce the electric field that the part increases on the surface in the contact when applying voltage between the contact separately.This increase electric field may cause occurring electron emission current by the Fowler-Nordheim effect, and this electric current causes between two contacts breakdown usually.Therefore, usually can observe such situation, the switch or the breaker vacuum box that have specified dielectric strength also therefore can bear the standard series of 15 surge pulses (surge impulse) under brand-new situation under not breakdown situation will produce the dielectric strength degeneration in normal range of operation, therefore and one or many will when applying the standard series of 15 pulses, will occur and puncture and (observe usually after puncturing several times, this box is returned to it and initially bears level, causes that by destruction the coarse point of puncture has repairing effect because puncture).This phenomenon is used and will can not produced any problem for relevant with the separation cut switch usually switch or circuit breaker, but be not suitable for cutting off function, this cut-out function is compared with switch, and need (separate a breaking distance) between break contact has higher and reliable especially dielectric strength.

In document US 3914568, introduced the high pressure cutout switch that comprises vacuum box.This vacuum switch forms the shell that comprises two contacts.Each contact by tube electrode around, this tube electrode forms the field line deflector shielding part that fixedly secures on outer cover body.In disconnection and closed procedure process, can move with respect to shell in these two contacts.At contact position, they are engaged with each other, and leave the only about half of length of deflector.When disconnecting, the contact returns to respectively in the corresponding tubular deflector, and is like this, shorter than the distance between the contact in the distance between the deflector.

In off-position, the contact is positioned at electric field more weak zone relatively, and like this, even the surface state deterioration of contact, the danger that produces arcing on contact plane reduces greatly.When disconnecting with closed procedure, the contact is in the position of protruding toward each other with respect to deflector.Therefore, have only the contact to be exposed in issuable any electric arc, thereby can keep the surface condition of deflector.Therefore, even after carrying out a large amount of disconnections and closed procedure, this device can make this box obtain outstanding dielectric strength.But, mechanism's complexity that contact-actuating is required is because the twofold motion that it need make the contact cooperatively interact simultaneously along relative direction with respect to the shell of box.When switching device must be carried out band and carries open-circuit operation, mechanism must be in that to carry cut-out function strong and carry out at high speed and disconnect in the compatible time with band.Then, the push and pull system that is used to pass motion to two armature contacts has bigger moving-mass, this weight adds upper contact weight, has increased the inertia of movable component, therefore, has increased mechanism and has carried out the energy that institute when disconnecting must supply.Wherein, the stroke of mechanism also will be greater than the stroke that box adopted that does not cut off function.Therefore, driving mechanism will be very expensive.And, also do not take measures to be limited in the stress of bellows seal in disconnection and closing course between contact and the box shell.This bellows seal must be able to be born big and strain faster, and this standard bellows with respect to the switching device that does not cut off function has increased cost.Therefore, the structure of this switching device makes that the cut-out function is very expensive.

In document EP 1005058, introduced a kind of vacuum switch-cutter.The armature contact that box comprises shell, fixedly secures the rest(ing) contact on this shell and driven by mechanism, this armature contact has three marker locations: make position, off position and off-position.This is box-packed to have two coaxial tubular deflector shielding parts, and these two tubular deflector shielding parts keep at a certain distance away relative to one another, and fixedly secure on the shell of box.A shielding part surrounds rest(ing) contact, and protrudes along the direction towards another shielding part with respect to rest(ing) contact.In off-position, armature contact returns to corresponding shield parts inside, and like this, this shielding part provides the dielectric strength of box.Between make position and off position, carry out the operation of separate contacts at a high speed, the operation of low speed execution separate contacts between off position and off-position then, this can adopt cheap driving mechanism.

The shortcoming of this device is to have when carrying out under the voltage condition when close stage, and the rest(ing) contact shielding part is exposed in the electric arc in disconnected phase and close stage process.Therefore cause rest(ing) contact to wear and tear too early.

Summary of the invention

Therefore, the objective of the invention is to overcome these shortcomings of this area, open circuit and cut off switching device so that provide, this switching device guarantees on breaking distance, high and stable in a vacuum resistance to pressure, and can adopt simple and cheap mechanism.

For this reason, the purpose of this invention is to provide a kind of outage and cut off switching device, it comprises:

Fixed support, this fixed support has been determined the geometric reference axis;

Vacuum switch, this vacuum switch comprises hermetically sealed, this hermetically sealed is equipped with:

First shielding part, this first shielding part is fixed with respect to shell;

Secondary shielding spare, this secondary shielding spare is fixed with respect to shell, and this first shielding part and secondary shielding spare are separated from each other by space between shielding part, and the border is determined by two geometrical planes perpendicular to the geometric reference axis in the space between this shielding part;

First contact, this first contact is static with respect to fixed support, and links to each other with shell by the first deformable seal part, and this first contact is electrically connected with first shielding part;

Second contact, this second contact links to each other with shell by the second deformable seal part, this second contact is electrically connected with secondary shielding spare, and can be with respect to fixed support along the translational motion between contact position and off-position of geometric reference axis, at this contact position place, second contact contacts with first contact, and first and second contacts are positioned at space between shielding part, this off-position will be through off position, and at this off position, first and second contacts still are positioned at space between shielding part;

Jockey, when second contact is between middle link position and off-position, the motion that this jockey is formed between second contact and the shell connects, like this, when move between middle link position and off-position in second contact, it makes shell along the axis of reference translation, and when second contact is positioned at off-position, this first and second contact all is positioned between shielding part outside the space, and between this shielding part the both sides in space, this centre link position is between off position and off-position.

Connection between shell and float electrode can be used the common case structure with single motion.Between make position and link position, have only the armature contact motion, it is motionless that shell keeps.This can make the quality minimum of moving between contact and off position, thereby makes required kinetic energy minimum in disconnection and the closing course.Being connected between open position and the off-position of shell and armature contact carried out, and do not need high-speed motion in this stage.This can make the cost minimum of jockey.Equally, first bellows seal is only worked between link position and off-position, therefore can obtain the sealing between first contact and shell at lower cost.

Preferably, the mid-plane between two geometrical planes determining space between shielding part is equidistant substantially in first contact of off position and second contact, and in each side of this mid-plane.At this moment, first and second contacts are in the position with respect to this mid-plane symmetry.

According to a concrete simple embodiment, jockey comprises retainer, and this retainer reliably guarantees to make shell and this second contact Union Movement when move in second contact between middle link position and off-position.Perhaps, can adopt progressive connector, it for example adopts cam or other any device with the variable gear ratio transmission.

Preferably, switching device comprises driving mechanism in addition, be used to make second contact to move with respect to fixed support, thereby make this second contact high-speed motion between contact position and off position, and making the slowly motion between off position and off-position of second contact, this driving mechanism is installed on the fixed support.Mechanism can make armature contact need a part of stroke high speed motion of rapid movement, so that be limited in the arc duration between the contact.Motion stage between off position and off-position, it is slower to move, the power that this can limiting mechanism, but the most important thing is to protect first bellows seal of box and connector.Thereby increase the reliability and the useful life of equipment.

Preferably, when second contact when contact position moves to off-position, driving mechanism makes second contact stop at off position.Therefore, even the electric arc that forms when contact separation continues the long period (about 20 milliseconds), also can guarantee when dissengaged positions moves, must make arc extinction when beginning.

Preferably, driving mechanism comprises that at least one disconnects energy accumulating device, and second contact is stretched to the high speed that moves through this disconnection energy accumulating device of off position from contact position and realized.This energy accumulating device guarantees to make opening time shorter.When second contact arrived off position, energy accumulating device is full extension preferably.According to an embodiment, this disconnection energy accumulating device comprises the store energy spring.

Preferably, driving mechanism comprises at least one closed energy accumulating device, and second contact is stretched to the high speed that moves through this closure energy accumulating device of contact position from off position and realized.This energy accumulating device guarantees to make closing time shorter, and must be when electric fault closure.According to an embodiment, closed energy accumulating device comprises the store energy spring.Disconnecting energy accumulating device can be different with closed energy accumulating device, so that can for example carry out high speed closure-disconnection circulation.Mechanism can be stage by stage, and the stretching, extension of closed storage device makes and disconnects the storage device load, so that obtain disconnection-closure-disconnection circulation at a high speed.The mechanism of the type is for example introduced in document EP 222645.Also can consider opposite situation, disconnect storage device and stretch and make closed storage device load.

Also can select, according to a special simple embodiment, the high speed that second contact disconnects energy accumulating device from off position to moving through of contact position stretches and realizes.At this moment, energy accumulating device is a bistable state, and process and the corresponding top dead-centre of load condition.

Preferably, driving mechanism comprises:

Operating means; And

The geared assembly of operating means, be used between the operating means and second contact, realizing that motion connects, thereby can be moved between off position and off-position in second contact, when second contact was between off position and contact position, this geared assembly was thrown off.

Operating means can be shirtsleeve operation bar or crank.These devices can motor driven or motor process auxiliary drive.

Description of drawings

By following explanation to specific embodiments of the present invention, can more know other advantage and feature, this specific embodiments is a purpose for example, and expression in the accompanying drawings, in the accompanying drawing:

Fig. 1 illustrates switching device of the present invention, and it is under closure, the no-load condition;

Fig. 2 illustrates the switching device of Fig. 1, and it is in closure, load condition is arranged;

Fig. 3 illustrates the switching device of Fig. 1, and it is in disconnection, no-load condition;

Fig. 4 illustrates the switching device of Fig. 1, and it is in disconnection, no-load condition, is illustrated in to move to off-state operation before;

Fig. 5 illustrates the switching device of Fig. 1, and it is in the middle transition state that disconnects between no-load condition and the dissengaged positions;

The switching device of Fig. 6 presentation graphs 1, it is in dissengaged positions;

The switching device of Fig. 7 presentation graphs 1, it is in disconnection, no-load condition, is illustrated in the operation before of load again;

Fig. 8 illustrates the switching device of Fig. 1, and it is in disconnection, load condition;

Fig. 9 illustrates the vacuum switch of the switching device of Fig. 1, and it is in contact position, corresponding to the state of the switching device shown in Fig. 1 and 2;

Figure 10 illustrates the vacuum switch that is in off position, corresponding to Fig. 3 and 4,7 and 8;

Figure 11 illustrates vacuum switch, and it is in the middle transition state between off position and the off-position, corresponding to Fig. 5; And

Figure 12 illustrates the vacuum switch that is in off-position, corresponding to Fig. 6.

Embodiment

Referring to figs. 1 to 8, high-voltage switch gear-cutter or circuit breaker-cutter 10 comprise at least one vacuum switch 12 and driving mechanism 14 thereof, and they are fixed on the bearing support 16.

The details of vacuum switch 12 is shown in Fig. 9 to 12.Vacuum casting 18 forms two parts by cylindricality ceramic body 20, and it has determined to be positioned at the geometric reference axis 22 of figure midplane, and seals by two

metal end plates

24,26 in its end.Each

end plate

24,26 extend into the inside of this shell by tubular

metal shielding part

28,30, the surface of revolution that this tubular

metal shielding part

28,30 forms around geometric reference axis 22.The free end of each

shielding part

28,30 is the shape of roll-in

pearl

32,34, and

geometrical plane

36,38 can be defined as tangent and perpendicular to the geometric reference axis with this pearl.These two

shielding parts

28,30 are arranged to be separated from each other, and by being that separate in space 40 between the shielding part on border with section 36,38.

Section

36,38 equates that from the distance on the geometric center plane 42 of box this geometric center plane 42 is also perpendicular to axis 22.The space is surrounded by the basic cylindricality metal intershield part 44 that is in floating potential (floatingpotential) between shielding part.This intershield part 44 is arranged to radially be positioned at the outside of shielding

part

28,30, and at the height place that can overlap with shielding

part

28,30 section axials.

Deflector shielding part 28 is around fixed electrode 50, and this fixed electrode 50 is formed by the Metallic rod of arranging along axis of reference 22, and is supported with rest(ing) contact 52 at an end place that is positioned at shell 18 inside.Metal electrode 50 comprises an end that is positioned at this housing exterior, and this end is designed for making bearing support 16 mechanical fixation of box with respect to switching device, and is electrically connected between electrode 50 and external circuit.Level and smooth cod 56 carries out axial lead between end plate 24 and electrode 50.Metal bellows seal 58 forms the deformability part that is tightly connected between end plate 24 and electrode 50.

Deflector shielding part 30 is around float electrode 60, and as fixed electrode 50, this float electrode 60 is formed by the Metallic rod of arranging along axis of reference 22 and is supported with armature contact 62 at an end place that is positioned at enclosure.Metal electrode 60 comprises an end that is positioned at this housing exterior, and this end is designed to be electrically connected between electrode 60 and external circuit on the one hand, and moving with driving mechanism 14 on the other hand is connected.This end also is formed with convex shoulder, and this convex shoulder can cooperate installs terminal pad 64, and this terminal pad 64 is fixed along translation direction with respect to electrode 60, and preferably can rotate freely with respect to this electrode 60, so that can not transmit torsional stress to this electrode 60.Be provided with boring 66 in this dish 64, be used to make gudgeon pin (gudgeonpin) 68 to pass through, these gudgeon pin 68 1 ends are welded on the end plate 26, and form head 70 as the axial retention device at its free end.Compression spring 72 will coil 64 and the end plate 26 of shell 18 push open each other.Dish 64, gudgeon pin 68 and spring 72 form connector 74 together between shell 18 and electrode 60.Level and smooth cod 76 carries out axial lead between end plate 26 and electrode 60.Metal bellows seal 78 forms the deformability part that is tightly connected between end plate and electrode.

The circuit-breaker driving mechanism can resolve into three sub-components interact with each other: bistable state motor sub-component 80, transmission sub-component 82 and multi-functional control and resetting sub assembly 84.These three sub-components have public live spindle (spindle) 86, and this axle 86 is fixing with respect to bearing support 16, intersect perpendicular to plan and with geometric reference axis 22.

Motor sub-component 80 uses flexible energy accumulating device 88, and this flexible energy accumulating device 88 has: compression spring 90, and this compression spring 90 is around carrying out hinged with respect to bearing support 16 fixing rotating dogs; And, Y-piece 94, this Y-piece 94 has two 94A of branch and 94B, can be around axle 86 pivoted, and be hinged on the energy accumulating device 88 by rotating dog 96.Spring 90 will make flexible energy accumulating device launch, like this, should vibrate between two settling positions that are shown in respectively among Fig. 1 and among Fig. 3 to 7 by flexible energy accumulating device, wherein, this energy accumulating device 88 arrives the maximum extension position that the retainer 98 between retractor device is determined.

Transmission sub-component 82 is formed by 102 pairs on bar 100-crank, and 102 pairs on this bar 100-crank extends to axial stretching contact pressure connector 104, and this connector 104 has spring 106, the connection between these spring 106 formation and the float electrode 60.Crank 102 is around axle 86 pivoted, and fixedly secures on dish 108, and this dish 108 is equipped with piece 110, and this piece 110 moves retainers 112,114 with two ends fixing with respect to the bearing support 16 of switching device and cooperates.Crank 102 is connected with bar 100 by transmission spindle 116, and the vibration of this transmission spindle 116 is by the 94A of branch, the 94B restriction of Y-piece 94, and the 94A of this branch, 94B are as retainer.Shrinking connecting-rod 104 slides in cod 118, and this cod 118 is by bearing support 16 supporting, and guiding shrinking connecting-rod 104 and float electrode 60 are along the translation of axis 22.Compression spring 104 will make this flexible connector launch.

Multi-functional control and resetting sub assembly 84 comprise half dish 120, this partly coils 120 around axle 86 pivoted, be equipped with two retainers 122,124 that cooperate with Y-piece 94, and be provided with cylindricality epitheca 126, the axial guides that this cylindricality epitheca 126 constitutes along axis 130 pilot operationp bars 128.Action bars 128 is equipped with handle 132 at the one end, is equipped with pin 134 in the opposite end, and this pin 134 cooperates with groove 136 in being formed at piece 110, and this piece 110 is integral with dish.

To introduce the operational cycle of switching device below.

Under the closure shown in Fig. 1 and 9, no-load condition, switching device can conduct electricity between the

electrode

50,60 that is in contact position.The transmission spindle 116 of bar-toggle 100,102 is positioned at the left side on the plane of being determined by geometrical axis 22 and live spindle 86.106 fractional loads of contact pressure spring, and will make axle 116 and dish 108 motion counterclockwise.But, piece 110 is resisted against and prevents to coil on the retainer 112 of 108 rotations.Energy accumulating device 88 is in the maximum extension position by retainer 98 restrictions.Store energy spring 90 stretches, but still makes Y-piece 94 be in position shown in Figure 1.Mechanism is in stable state.

As shown in Figure 9,

contact

52,62 is arranged in space 40 between shielding part.Contact plane can be defined as perpendicular to the axis between the preceding

facial planes

36,38 of two

shielding parts

28,30, and compares the shielding part 28 of more close fixed electrode 50 with the shielding part 30 of float electrode.

For the cut-off switch device, the operator moves clockwise to the position shown in Fig. 2 action bars 128.When rotated, fixedly secure partly coiling on

action bars

128 and 120 drive Y-pieces 94 by retainer 122, this will make flexible energy accumulating device 88 return, and make spring 90 loads of this energy accumulating device 88.Last revolving process before the position that arrives Fig. 2, the left branch 94A of Y-piece contacts with transmission spindle 116, and begins to make bar-toggle 100,102 to move to the top dead-centre that aligns with axis 22, thus the flexible connector 104 of compression.The position of Fig. 2 is dual unstable position, because it comprises bar-toggle 100,102 on the one hand along the alignment of the instability of translated axis line 22, comprises the aliging of live spindle 86 of expansion link 88 and Y-piece 94 on the other hand.In case action bars 128 moves clockwise to surpassing position shown in Figure 2, the spring 90 of energy accumulating device 88 will stretch, and promote the position that Y-piece 94 moves to Fig. 3.The left-hand branch 94A of Y-piece drives transmission spindle 116, drives transmission sub-component 82 simultaneously, and this makes float electrode 60 move to the off position shown in Figure 10.In this position, contact 52,62 still is positioned at space between shielding part, and approximate equidistant from mid-plane 42.When the electric current that disconnects moment flows through

electrode

50,60, between

contact

52,62, produce electric arc.Distance between the

contact

52,62 at the off position place of Figure 10 is enough to make that electric arc finally extinguishes.At this off position, still protrude toward each other with respect to shielding

part

28,30 contact.Therefore guarantee that electric arc can not transfer on the

shielding part

28,30, and guarantee the surface state of roll-in

pearl

32,34 is remained intact.

Stable at the disconnection no-load condition shown in Fig. 3 and 10.The spring 90 of energy accumulating device stretches, and the spring 106 of flexible connector also stretches.

Can make the contact further mutually away from, thereby arrive off-position.For this reason, at first must around its longitudinal axis 130 rotations (shown in arrow among Fig. 4) this action bars 128 be connected with dish 108, so that pin 134 is entered in the groove 136 by making action bars 128.In second step, action bars 128 is rotated so that driving-disc 108 makes transmission spindle 116 rotate to position shown in Figure 6 from position shown in Fig. 4 simultaneously, around axle 86 clockwise directions wherein fast by the crossover position shown in Fig. 5.

Between the position of Figure 4 and 5,82 of transmission sub-components drive float electrode 60.It is fixing with respect to fixed electrode 50 and bearing support 16 that shell 18 keeps, because it is subjected to the bias voltage of spring 72.When the position shown in arrival Fig. 5 and 11, head 70 forms connection against by dish 64 retainers that form between float electrode 60 and shell 18.In this position, armature contact 62 is return with respect to secondary shielding spare 30, and leaves space 40 between shielding part.The further along clockwise direction pivoted of action bars 128 will make mechanism 14 move to off-position shown in Figure 6, and in this position, piece 110 is stoped by retainer 114.In the last stages of this motion, transmission sub-component 82 drives electrode 60 and the shell 18 that is fixed together, up to arriving the off-position shown in Figure 12.Therefore, it is constant with respect to the centre position of Figure 11 that the relative position of float electrode 60 and secondary shielding spare 30 keeps, and the whole casing 18 that comprises shielding

part

28,30 and float electrode 60 is together with respect to 50 motions of the fixed electrode on the bearing support 16 that is fixedly mounted on switching device.In this off-position, rest(ing) contact 52 relative first shielding parts 28 are in the position of returning, and leave space 40 between shielding part.

In this position, to compare during with off position, contact 52,62 is spaced from each other farther, and this can reduce the dielectric deterioration.The more important thing is, the both sides in space 40 between shielding part, contact 52,62, and be in the protection zone from the dielectric aspect as the

shielding part

28,30 of field wire deflector.Have only shielding

part

28,30 to be subjected to high electric field, this can't cause problem, because their surface state will be kept when opening circuit.

The closure of switching device is also carried out with two stages.In the phase I, the operator makes action bars 128 pivoted counterclockwise, up to reaching aforementioned disconnection no-load condition.Then, he throws off pin and piece by rotatablely move (shown in the arrow among Fig. 7) of handle, thereby action bars 128 and transmission sub-component 82 are thrown off.Then, the retainer 124 of half dish contacts with Y-piece 94.The operator can make action bars 128 counterclockwise around axle 86 motions, so that arrive the position of Fig. 8 from the position of Fig. 7 again.In this motion process, transmission sub-component 82 no longer is driven, and keeps motionless, and the motor sub-component is driven, thus the spring 90 of compression energy storage device 88.The right-hand branch 94B of Y-piece presses the transmission spindle 116 of transmission sub-component 82.The disconnecting consumers state labile of Fig. 8, in a single day the operator makes action bars 128 counter clockwise direction pivoted surpass this position, alignment between Y-piece 94 and energy accumulating device 88 will destroy, thereby the spring 90 of energy accumulating device 88 is stretched, and make Y-piece 94 pivoted counterclockwise, thereby make the switching device high-speed motion to closed no-load condition shown in Figure 1, this hour indicator 108 is stopped by retainer 112.

Therefore, the closure of box is extremely quick as disconnecting, and when move under the charged situation of parts toward each other in the contact, can prevent that also the contact from suffering damage.

Various versions are certainly arranged.

Preferably, the motor sub-component can arrive load condition before its dead point of transmission sub-component arrival, and like this, its guarantees that energy accumulating device has begun the stretching, extension to open position when through top dead-centre.

Control and resetting sub assembly can motor driven, particularly at the reseting stage of store energy spring.More generally, driving mechanism can be to guarantee to disconnect and the close stage high-speed motion, and any kind that slowly moves between disconnection and off-position.Preferably, this mechanism will guarantee to stop at open position, perhaps suspend at least, so that carried out arc extinguishing before moving to off-position.

In the embodiment that provides as an example, shielding part 28 is in the current potential of fixed electrode 50, and shielding part 30 is in the current potential of float electrode 60.The electrical connection of electric capacity or resistance but, also can be provided between each shielding part and respective electrode.

Certainly, also can be in the ground connection toning (earthing overtravel) that float electrode 60 is provided above position shown in Figure 6, this makes float electrode that the 4th indicating positions be arranged.

Present embodiment relates to high voltage.But, the present invention also can be used for low pressure.

Fixed supporting frame 16 constitutes the reference bearing support of box and mechanism.But, it self also can be with respect to the integrated electric equipment moving of switching device.Particularly, it can be formed by the framework of the travelling carriage that is used for being connected with the bus insertion.

Claims

1. one kind cuts off the power supply and cut-out switching device (10), and it comprises:

Fixed support (16), this fixed support have been determined geometric reference axis (22);

Vacuum switch (12), this vacuum switch comprise hermetically sealed (18), and this hermetically sealed is equipped with:

First shielding part (28), this first shielding part is fixing with respect to shell (18);

Secondary shielding spare (30), this secondary shielding spare is fixing with respect to shell (18), this first shielding part (28) and secondary shielding spare (30) are separated from each other by space between shielding part (40), and the border is determined by two geometrical planes (36,38) perpendicular to geometric reference axis (22) in the space between this shielding part;

First contact (52), this first contact is static with respect to fixed support (16), and links to each other with shell (18) by the first deformable seal part (58), and this first contact (52) is electrically connected with first shielding part (28);

Second contact (62), this second contact links to each other with shell (18) by the second deformable seal part (78), this second contact (62) is electrically connected with secondary shielding spare (30), and can be with respect to fixed support (16) along geometric reference axis (22) translational motion and process off position between contact position and off-position, at this contact position place, second contact (62) contacts with first contact (52), and first and second contacts are positioned at space between shielding part (40), at this off position, first and second contacts still are positioned at space between shielding part (40);

Jockey (74), when second contact (62) between middle link position and off-position the time, this jockey forms motion and connects between second contact (62) and shell (18), like this, when move between middle link position and off-position second contact (62), it makes shell (18) along axis of reference (22) translation, and when second contact is positioned at off-position, this first contact (52) and second contact (62) all are positioned at outside the space between shielding part (40), and between this shielding part the both sides of space (40), this centre link position is between off position and off-position.

2. outage according to claim 1 and cut-out switching device, wherein: equidistant in first contact (52) of off position and second contact (62) mid-plane (42) between two geometrical planes determining space between shielding part, and in the both sides of this mid-plane.

3. outage according to claim 1 and cut-out switching device, wherein: jockey (74) comprises retainer, and this retainer reliably guarantees to make shell (18) and this second contact (62) Union Movement when move in second contact between middle link position and off-position.

4. outage according to claim 2 and cut-out switching device, wherein: jockey (74) comprises retainer, and this retainer reliably guarantees to make shell (18) and this second contact (62) Union Movement when move in second contact between middle link position and off-position.

5. according to described outage of aforementioned any one claim and cut-out switching device, also comprise: driving mechanism (14), be used to make second contact (62) to move with respect to fixed support (16), thereby make this second contact (62) high-speed motion between contact position and off position, and making second contact (62) slowly motion between off position and off-position, this driving mechanism (14) is installed on the fixed support (16).

6. outage according to claim 5 and cut off switching device, wherein: when second contact when contact position moves to off-position, driving mechanism (14) makes second contact stop at off position.

7. outage according to claim 5 and cut-out switching device, wherein: driving mechanism (14) comprises that at least one disconnects energy accumulating device (88), and second contact (62) are stretched to the high speed that moves through this disconnection energy accumulating device (88) of off position from contact position and realized.

8. outage according to claim 6 and cut-out switching device, wherein: driving mechanism (14) comprises that at least one disconnects energy accumulating device (88), and second contact (62) are stretched to the high speed that moves through this disconnection energy accumulating device (88) of off position from contact position and realized.

9. outage according to claim 7 and cut-out switching device, wherein: this disconnection energy accumulating device comprises store energy spring (90).

10. outage according to claim 8 and cut-out switching device, wherein: this disconnection energy accumulating device comprises store energy spring (90).

11. outage according to claim 5 and cut-out switching device, wherein: driving mechanism comprises at least one closed energy accumulating device (88), and second contact (62) are stretched to the high speed that moves through this closure energy accumulating device (88) of contact position from off position and realized.

12. outage according to claim 11 and cut-out switching device, wherein: closed energy accumulating device comprises store energy spring (90).

13. outage according to claim 7 and cut off switching device, wherein: second contact is stretched and is realized from the high speed that disconnects energy accumulating device (88) that moves through of off position to contact position.

14. outage according to claim 8 and cut off switching device, wherein: second contact is stretched and is realized from the high speed that disconnects energy accumulating device (88) that moves through of off position to contact position.

15. outage according to claim 9 and cut off switching device, wherein: second contact is stretched and is realized from the high speed that disconnects energy accumulating device (88) that moves through of off position to contact position.

16. outage according to claim 10 and cut off switching device, wherein: second contact is stretched and is realized from the high speed that disconnects energy accumulating device (88) that moves through of off position to contact position.

17. outage according to claim 5 and cut-out switching device, wherein, driving mechanism comprises:

Operating means (128); And

The geared assembly of operating means (134,136), be used between operating means (128) and second contact (62), realizing that motion connects, thereby can be moved in second contact (62) between off position and off-position, when second contact (62) between off position and contact position the time, this geared assembly (134,136) is thrown off.