CN101331572A - Load interrupter for an encapsulated switchgear and permanent magnet system for a load interrupter - Google Patents
Load interrupter for an encapsulated switchgear and permanent magnet system for a load interrupter Download PDFInfo
- Publication number
- CN101331572A CN101331572A CNA2006800468852A CN200680046885A CN101331572A CN 101331572 A CN101331572 A CN 101331572A CN A2006800468852 A CNA2006800468852 A CN A2006800468852A CN 200680046885 A CN200680046885 A CN 200680046885A CN 101331572 A CN101331572 A CN 101331572A
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- Prior art keywords
- contact
- permanent magnetic
- magnetic system
- break switch
- fixed contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
- H01H33/121—Load break switches
- H01H33/123—Load break switches in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/42—Knife-and-clip contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/187—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet comprising a hollow annular arc runner and a central contact between which a radially drawn arc rotates
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Keying Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Push-Button Switches (AREA)
Abstract
According to the invention, a load interrupter for an encapsulated, gas-insulated switchgear comprising at least one contact system with a fixed contact arrangement and a moving contact arrangement and a permanent magnet system provided on the fixed contact may be produced having a high switching capacity whilst being simple and economical of construction, by means of fixing the permanent magnet system externally to the fixed contact arrangement with an electrical connection such that on opening the load interrupter the arc which occurs runs to the permanent magnet system.
Description
The present invention relates to a kind of load-break switch of gas-insulated sealed switchgear, it has at least one contact system, and this contact system comprises the permanent magnetic system that a fixed contact device and motion contact making device and set for the fixed contact device.
By the known this load-break switch of EP0296915B1.Disclosed there load-break switch comprises that two are located at rotation plug-in strip on the switch shaft as moving contact making device along the opposed fixed contact of diameter as fixed contact device and one.Establish permanent magnet in the fixed contact in this load-break switch respectively as permanent magnetic system.The electric arc that the described layout of permanent magnet forms when causing the break contact system moves by this way, promptly, point prevents restriking after current over-zero electric arc extinguishes naturally thus by in the shadow positions (Schattenlage) on the magnetic air blast immigration fixed contact device at the bottom of making electric arc.
The objective of the invention is, the load-break switch of the described type of design preface makes it to have when switching capability is strong simple and inexpensive structure.
By the present invention is to reach the measure that this purpose takes to be, permanent magnetic system and the fixed contact device ground connection that is electrically connected is fixed on this fixed contact device outside, and the electric arc that forms when disconnecting load-break switch is extended to permanent magnetic system.
Adopt permanent magnetic system in the above layout of fixed contact device, constitute the arc-control device of load-break switch, just permanent magnetic system can be placed in its outside because the fixed contact device need not particular design in simple mode.
Preferably design by another, permanent magnetic system is arranged as its bottom side and faces an electric arc that forms when the break contact system.A kind of like this layout guarantees the interaction between the magnetic field of electric arc and permanent magnetic system in simple mode.
By a kind of favourable form of implementation, permanent magnetic system is located at outside the fixed contact device by first extreme position of the movement locus decision of motion contact making device and by in the zone between second extreme position of fixed contact device decision.A kind of like this layout guarantees to make electric arc to shift to permanent magnetic system from the fixed contact device in simple mode.By another favourable design, annular permanent magnnet is set to, and makes it center on fixed contact.Adopt this layout might electric arc be shifted to permanent magnetic system from the fixed contact device in simple mode equally.
By favourable the further developing of the present invention, permanent magnetic system is set to the angle between 65 ° and 75 ° of being oriented with respect to the fixed contact device.By a series of test identifications, such angle is particularly conducive to electric arc and shifts to permanent magnetic system from the fixed contact device.
By another preferred form of implementation, on the motion contact making device, hingedly be provided with one and follow the tracks of the contact, before a limit switch off angle that reaches between fixed contact device and the motion contact making device, be electrically connected following the tracks of to constitute between contact and the permanent magnetic system, and then disconnect being electrically connected between tracking contact and the permanent magnetic system during greater than this limit switch off angle in angle.By this tracking contact, advantageously guaranteed the burning of electric arc between permanent magnetic system and tracking contact.
By another design, following the tracks of the contact abuts on the fixed contact device when contact system is closed, and when contact system disconnects with situation that the fixed contact device keeps being electrically connected under change and is connected on the permanent magnetic system, and when reaching capacity switch off angle, cancel electrical connection.A kind of like this layout helps avoiding fully the fixed contact device to degrade material because of electric arc.
By a preferred design, follow the tracks of the contact and when contact system is closed, abut on the permanent magnetic system, and cancellation is electrically connected when reaching capacity switch off angle.Adopt this design to help preventing fully that the fixed contact device is because of the electric arc stand under load.
By the present invention is to reach the measure that the purpose of proposition takes to be in another kind of scheme, on the motion contact making device, hingedly be provided with one and follow the tracks of the contact, which is provided with permanent magnetic system, before a limit switch off angle that reaches between fixed contact device and the motion contact making device, is electrically connected following the tracks of to constitute between contact and the fixed contact device, and disconnection angle being electrically connected between disconnection tracking contact and the fixed contact device during greater than limit switch off angle.Adopt the layout of this permanent magnetic system on the fixed contact device just can design an arc-control device that is used for load-break switch, just permanent magnetic system can be located at easily on the tracking contact because the fixed contact device need not particular design in simple mode.Help the motion contact making device fully not because of the electric arc stand under load by this form of implementation.
By a kind of preferred form of implementation, permanent magnetic system comprises a rotational symmetric permanent magnet, and this permanent magnet is inserted in the shell of electric conducting material system.Just can constitute a magnetic field in an advantageous manner by this permanent magnet, there is the field regions that is parallel to the magnet surface extension in this magnetic field, one Lorentz force acts on the electric arc that forms when the break contact system thus, thereby force electric arc to rotate along rotational symmetric permanent magnet, in this case, on the one hand can stop destruction by shell, then constitute easily on the other hand and being electrically connected of fixed contact device in simple mode to permanent magnet.
By a preferred design, shell is a recessed dish that constitutes with nonmagnetic metal, and is facing those side shielding permanent magnets of electric arc.Nonmagnetic metal, for example copper or zinc help constituting a kind of screening arrangement of protecting permanent magnet not destroyed by electric arc, and this screening arrangement is electrically connected with the fixed contact device.
By a design that meets purpose, recessed dish back to a side of electric arc by a cover closure.Thisly preferably use cover plate made of iron that a kind of simple and economic possibility is provided, be the protection permanent magnet and seal recessed dish.In addition, cover plate strengthens effective magnetic field by the iron yoke.
By another kind of preferred form of implementation, housing designs is a ring-type, and accommodates the permanent magnet of an annular.By this shell, just can shield those sides that permanent magnet faces electric arc in an advantageous manner, thereby prevent to destroy permanent magnet.
By another kind of preferred design, fixture has one permanent magnetic system is fixed on fixed area on separately the fixed contact device and the supporting area that a permanent magnetic system shell is arranged, and supporting area comprises an electric arc guide rail.This fixture is very favorable, because can be electrically connected with the fixed contact device by the permanent magnetic system shell of its one side, particularly advantageously formed an electric arc guide rail on the other hand, thereby permanent magnetic system and especially shell are prevented by electrical arc erosion by the electric arc guide rail of supporting area by supporting area.
By another design, shell comprises that an essential part that an end and a hollow cylinder wall arranged and diameter less than the cover plate of hollow cylinder wall, establish central through hole in essential part and in cover plate.This shell provides a kind of iron yoke that is used for permanent magnetic system in an advantageous manner, puts acceleration thereby form at the bottom of strong radial magnetic field makes electric arc.This can be particularly advantageously supported by following measures, that is, cover plate has different radiuses with the hollow cylinder wall, thereby form the gap that further strengthens radial magnetic field between them.Can shell be fixed on the fixture with simple mode by central through hole.By another kind of preferred form of implementation, establish an insulating lid that is used for permanent magnetic system, it comprises the bezel ring, and the cover piece that have a groove, they can be by the buckling and locking device kayser on fixture.Adopt this insulating lid to provide more favourable protection for permanent magnetic system and shell; the plastic insulating lid because electric arc can not burn; can one electric arc that forms when fixed contact is separated in the motion contact be transferred on the electric arc guide rail easily advantageously by be in the groove in the fixed contact device zone at confined state in this case.
By a kind of preferred form of implementation, permanent magnet is the annular magnet of axial magnetized.This magnet is with low cost and have a magnetic field in an advantageous manner, and this magnetic field comprises a plurality of zones that have the magnetic line of force that is parallel to the magnet surface extension.
By another kind of preferred form of implementation, permanent magnet is the annular magnet of diametrical magnetization.This magnet has a magnetic field, and this magnetic field comprises that some are parallel to the zone of the magnetic line of force of magnet surface extension.
By a favourable design, permanent magnet is made of neodymium ferro-boron compound.This permanent magnet provides high magnetic field intensity value and big demagnetization resistance in an advantageous manner.
By another kind of preferred design, permanent magnet is made of the SmCo compound.This permanent magnet can advantageously use under higher temperature.
By a kind of preferred form of implementation, permanent magnet is made of hard ferrite.Hard ferrite advantageously makes the permanent magnet made from low cost.Particularly preferred hard ferrite is strontium ferrite or barium ferrite.
In addition, the invention still further relates to a kind of permanent magnetic system that is used for load-break switch, this load-break switch is used for a gas-insulated sealed switchgear, it has at least one contact system, this contact system comprises a fixed contact device and a motion contact making device, and sets this permanent magnetic system for the fixed contact device.
The objective of the invention is, further design this permanent magnetic system, making it when switching capability is strong load-break switch can have simple and inexpensive structure.
Reaching the measure that this purpose takes permanent magnetic system by the present invention is, makes permanent magnetic system that external fixation device is arranged, and is used for being fixed on permanent magnetic system on separately the fixed contact device and being used for being electrically connected with the fixed contact device.
Adopt this configuration on the fixed contact device of permanent magnetic system, simply mode constitutes a kind of arc-control device that is used for load-break switch, because permanent magnetic system is positioned in the outside of fixed contact device.
By a kind of preferred form of implementation, fixture has one permanent magnetic system is fixed on the fixed area on separately the fixed contact device and a supporting area that is used for permanent magnetic system shell is arranged, and wherein, this supporting area comprises an electric arc guide rail.
By another kind of preferred form of implementation, shell comprises that an essential part that an end and a hollow cylinder wall arranged and diameter less than the cover plate of hollow cylinder wall, establish central through hole in essential part He in the cover plate.
By another design of the present invention, establish an insulating lid that is used for permanent magnetic system, it comprises the bezel ring, and the cover piece that have a groove, they can be by the buckling and locking device kayser on fixture.
The embodiment that represents by accompanying drawing and accompanying drawing elaborates to the present invention below.
Wherein:
Fig. 1 represents first kind of form of implementation by load-break switch of the present invention;
Press load-break switch detail drawing of the present invention in Fig. 2 presentation graphs 1;
Fig. 3 represents the permanent magnetic system permanent magnet detail drawing that can use in the form of implementation of Fig. 1;
Fig. 4 represents the view by the another kind of embodiment of load-break switch of the present invention;
Fig. 5 represents by the another kind of form of implementation of load-break switch of the present invention;
Fig. 6 represents by the another kind of form of implementation of load-break switch of the present invention;
Fig. 7 represents by the another kind of form of implementation of load-break switch of the present invention;
Fig. 8 represents by the another kind of form of implementation of load-break switch of the present invention;
Fig. 9 represents by the another kind of form of implementation of load-break switch of the present invention;
Figure 10 represents by the another kind of form of implementation of load-break switch of the present invention;
Figure 11 represents by permanent magnetic system exploded view of the present invention;
Figure 12 represents the permanent magnetic system birds-eye perspective that assembles by the present invention of Figure 11; And
Figure 13 represents the permanent magnetic system bottom perspective view that assembles by the present invention of Figure 11.
Fig. 1 represents that one is used for the load-break switch 1 of gas-insulating type switchgear by the present invention, especially with SF6 or SF6 mixture as insulating gas (its sealing is not shown among the figure), this load-break switch has a fixed contact device 2 that comprises fixed contact 3,4,5.Fixed contact 3,4,5 is installed on the support 6, here constitutes with the conduction of a not shown cylinder manifold device to be connected.Load-break switch 1 also comprises the motion contact making device 7 with motion contact 8,9,10.The contact 8,9,10 of moving in the present embodiment is designed to double-pole motion contact and is fixed on the switch shaft 11, and this switch shaft can be rotated to support on the support 12 and by unshowned driver drives.In addition, establish an earthing contact device 13 that comprises earthing contact 14,15,16.It all is solid cavetto that fixed contact 3,4,5 faces the side 20,21,22 of that side 17,18,19 and earthing contact 14,15,16 of motion contact 8,9,10 the same at them, so the contact system of forming by fixed contact device 2 and motion contact making device 7 or by earthing contact device 13 and motion contact making device 7 closure easily.On fixed contact device 2, be provided with the permanent magnetic system 23 that comprises permanent magnet 24,25,26, they are the housing shroud of recessed dish 27,28,29 in that side that it faces motion contact making device 7 by formal respectively, and seal by for example cover plate 30,31,32 made of iron in its that side back to motion contact making device 7.Recessed dish 27,28,29 is connected with fixed contact 3,4,5 conductions by fixture 33,34,35.
The position and the isolation of the load-break switch that Fig. 1 represents are corresponding, and motion this moment contact making device 7 neither is not connected with earthing contact device 13 conductions with fixed contact device 2 yet.Motion contact making device 7 can be by not shown drive unit, sets up position that conduction is connected and motion contact making device 7 by switch shaft 11 at motion contact making device 7 and fixed contact device 2 and conducts electricity with 13 foundation of earthing contact device and turn round between the position that is connected.
If to conduction between fixed contact device 2 and the motion contact making device 7 is connected the contact system of closure, trigger the switching process that motion contact making device 7 separates with fixed contact device 2 by drive unit with switch shaft 11, then in this separation process, form electric arc between motion contact 8,9,10 and the fixed contact 3,4,5.This electric arc extinguishes during follow-up current over-zero.Can guarantee the switching capability that extinguishing also thereby guaranteeing load-break switch 1 of electric arc by the permanent magnetic system 23 on the fixed contact device 2.
Fig. 2 represents a contact system detail drawing of load-break switch 1 shown in Figure 1, and it comprises the permanent magnetic system 23 under fixed contact 3 and motion contact 8 and the permanent magnet 24, and permanent magnet 24 is contained in the recessed dish 27.Permanent magnet 24 is covered by cover plate 30 in its that side back to motion contact 8.Recessed dish 27 and cover plate 30 are fixed on the fixed contact 3 by retaining element 33 and set up with it and be electrically connected.In position shown in Figure 2, carry out so far with the separation process of fixed contact 3 motion contact 8, that is, at first the electric arc of burning has jumped onto recessed dish 27 between motion contact 8 and fixed contact 3, and burns away on recessed dish.By being contained in permanent magnet 24 and the magnetic field thereof in the recessed dish 27, power of effect forces electric arc to rotate on a circuit orbit thus on electric arc.Rotate along a circular surface by electric arc, degrade the localized burn or the part that have significantly reduced material, and guarantee reliably to extinguish when ensuing current over-zero.
Fig. 3 represents the annular permanent magnnet 24 of an axial magnetized, and its utmost point is represented with S and N, and represented the corresponding magnetic line of force in magnetic field with M.As seen from Figure 3, form three area I, II, III by this layout, the magnetic line of force is parallel to the surface extension of permanent magnet 24 in these zones.If for example electric current flows through towards the direction of permanent magnet under the situation of arc burning, then this electric current suffers a Lorentz force by magnetic field, and it impels electric arc to rotate around the rotation of permanent magnet 24.The annular permanent magnnet 24 that replaces axial magnetized also can use the annular permanent magnnet of diametrical magnetization, and it has the zone of the magnetic line of force that some surfaces that are parallel to permanent magnet extend equally.
Fig. 4 represents the different fixed position of permanent magnetic system 23 on fixed contact 3 for example, and fixed contact 3 has been set up to conduct electricity with motion contact 8 and has been connected in Fig. 4.With symbol C and the dotted line movement locus of contact 8 in switching process of representing to move, in this switching process, will separate by the contact system that fixed contact 3 and motion contact 8 are formed.Described movement locus C has determined below first extreme position D, by it determine permanent magnetic system 23 from the motion contact 8 nearest positions.Determine second extreme position E by fixed contact 3, nearest when permanent magnetic system 23 is fixed on this position from fixed contact 3.At position D and E, permanent magnetic system is represented with chain-dotted line or dotted line.Represent a fixed position of permanent magnetic system 23 with alphabetical F, this moment is with respect to an angled α of horizontal axis of load-break switch.
Position F by angle [alpha] is determined means it is a kind of preferred allocation position of permanent magnetic system 23 with respect to fixed contact device 2 fixed contacts 3 orientations, here can select between 65 ° and 75 ° with respect to the angle [alpha] of fixed contact device 2 orientations.
Fig. 5 represents the another kind of form of implementation that permanent magnetic system 23 is fixed on fixed contact 3, this moment, annular permanent magnnet 24 was in its outside, bottom side and inboard, all by the direction shielding of the annular outer cover 27 of the annular permanent magnnet that reclining along the move direction of contact 8 or the contact 8 movement locus C that move.
Fig. 6 represents the another kind of form of implementation by load-break switch 1 of the present invention, wherein follows the tracks of contacts 36 by hinged one of hinge 37 on motion contact 8.Dotting the motion contact of contact system when closed, is motion contact when contact system disconnects and solid line is represented.Here, follow the tracks of contact 36 by not shown a kind of suitable elastic mechanism supporting, for example one with at the stop portion coefficient compression spring of motion on the contact 8, thereby in the separation process of the contact system of forming by motion contact 8 and fixed contact 3, follow the tracks of contact 36 by elastic component being electrically connected between contact 8 and the fixed contact 3 that keep moving, move contact 8 or its free end are then away from fixed contact 3., follow the tracks of contact 36 and finally stop it to continue motion when movement locus C moves in motion contact 8, thereby when arriving the limiting angle of regulation, also cut off being electrically connected between tracking contact 36 and fixed contact 3 or the permanent magnetic system 23 by not shown stop portion.Electric arc burns between contact 36 and the permanent magnetic system 23 and extinguishes during at current over-zero next time following the tracks of in this case.
Fig. 7 represents by the side-looking of the another kind of form of implementation of load-break switch of the present invention and front view, here, follows the tracks of contact 38 and is contained on the motion contact 8 by hinge 39 and above-mentioned not shown elastic component and stop portion.Establish to the side direction partition distance a permanent magnetic system 40 on fixed contact 3, it is electrically connected with fixed contact 3 by steady pin 41.During separation process, at first keep contacting as in the embodiment shown in fig. 6 by the recessed dish of following the tracks of contact 38 and permanent magnetic system 40, under the situation at angle that oversteps the extreme limit, when separate with fixed contact 3 motion contact 8, follow the tracks of contact 38 and finally separate with permanent magnetic system 40, the arc burning between permanent magnetic system 40 and the tracking contact 38 also extinguishes when current over-zero next time.
The another kind design of the tracking contact of Fig. 8 presentation graphs 6, here, tracking contact 42 among Fig. 8 is set up conduction with permanent magnetic system 23 equally and is connected, and in separation process, under the situation that surpasses the limit switch off angle between motion contact 8 and the fixed contact 3, described electrical connection disconnects, and follows the tracks of the arc burning between contact 42 and the permanent magnetic system 23 and extinguishes when current over-zero next time.Motion contact 8 when the contact system disconnection is represented in the motion contact 8 when dotting the contact system closure, solid line.
Fig. 9 represents the another kind of form of implementation by load-break switch of the present invention, wherein permanent magnetic system 44 is circlewise around fixed contact 3, here, permanent magnet 44 at least its face the motion contact 8 or the motion contact 8 movement locus C that side still by recessed dish 45 conductively-closeds.In this layout, the magnetic field that permanent magnet 44 produces acts on the electric arc equally in this way, that is, force the electric arc rotation and finally extinguish when current over-zero next time.
Figure 10 represents the another kind of form of implementation by load-break switch of the present invention, wherein follows the tracks of contact 46 and is contained on the motion contact 8 by hinge 47 and not shown elastic component and stop portion.Fix a permanent magnetic system 48 on tracking contact 46, this perseverance magnetic system has a permanent magnet 49 and and is used for towards the recessed dish 50 of the direction shielding permanent magnet of fixed contact 3.By this form of implementation, when separated with fixed contact 3 motion contact 8, the electric arc between fixed contact 3 and the permanent magnetic system 48 was lighted, and the magnetic field that this electric arc produces based on permanent magnet 49 rotates along the surface of recessed dish 50 equally and extinguishes when current over-zero next time.Tracking contact 46 and permanent magnetic system when tracking contact 46 and permanent magnetic system when dotting the contact system closure, solid line are represented the contact system disconnection.
Fig. 2 and 4 gives an example until 10 and represents to press the configuration of load-break switch of the present invention, wherein for for simplicity, has only represented one respectively by a fixed contact and the contact system that the motion contact is formed.
Figure 11 represents the exploded view by permanent magnetic system 23 of the present invention, and this perseverance magnetic system is arranged on the fixed contact 17,18,19 as shown in Figure 1.Fixture 33 has one permanent magnetic system 23 is fixed on fixed area 51 and a supporting area 52 on separately the fixed contact device.Here, fixed area 51 is made of two fixed heads 53,54, and described fixed head has fixing hole 55 and 56, and fixture 33 is screwed on fixed contact separately by fixing hole.In addition, also be shaped on groove 57,58 at fixed area 51, they are given for the cover piece that installation hereinafter will illustrate.The supporting area 52 of fixture 33 comprises the annulus 59 of an arcing guide rail 59.Electric arc guide rail 59 is connected with fixed area 51 by connecting plate 60,61, is shaped on locked groove in connecting plate 60,61, can only see one of them locked groove 62 in the drawings.Permanent magnet 24 is contained in the shell, this shell comprises that by one the essential part 63 of the end 64 and hollow cylinder wall 65 and a cover plate 66 form, so permanent magnet 24 is covered by shell basically fully, herein, the shell iron of forming by essential part 63 and cover plate 66, thus constitute the iron yoke of permanent magnetic system by shell.Cover plate 66 has the external diameter littler than the internal diameter of hollow cylinder wall 65 here, make to form the radial magnetic field that strengthens in the gap of between cover plate 66 and hollow cylinder wall 65, reserving, by this radial magnetic field with electric arc at the bottom of point farthest be pushed on the electric arc guide rail 59.Bezel ring, of making by plastics 67 and cover piece 68 regulations are as the over cap of permanent magnetic system 23.In addition, cover plate 66, permanent magnet 24 and essential part 63 have central through hole 69,70,71, the buckling and locking device 72 of cover piece 68 passes them and extends, and buckling and locking device 72 inserts in the groove 57,58 of fixture 33 fixed areas 51, and whole device can be fixed on the fixture 33.Bezel ring, 67 is locked in their locked groove 62 on the fixture 33 equally by latch hook 73,74, thereby protecting cover by bezel ring, 67 and the permanent magnetic system of cover piece 68 formations, wherein bezel ring, 67 has a front hole 75, its radius is corresponding with the outer radius of electric arc guide rail 59, the radius of cover piece 68 is corresponding with the inside radius of electric arc guide rail 59, so can cover permanent magnetic system 63 except that electric arc guide rail 59 by bezel ring, 67 and cover piece 68.
Figure 12 represents the permanent magnetic system birds-eye perspective that has made up on the fixture 33, wherein, the buckling and locking device 72 of cover piece 68 kayser in groove 57 and 58, bezel ring, 67 with its latch hook 73 and 74 kaysers in the locked groove 62 of connecting plate 60,61.
Figure 13 represents the bottom perspective view of the permanent magnetic system that made up, wherein the electric arc guide rail 59 that as seen is made of supporting area 52 between bezel ring, 67 and cover piece 68.The groove 76 of bezel ring, 67 as seen from Figure 13, it is in the zone of fixed contact device at confined state, and the electric arc that it forms when motion contact 8,9,10 is separated with fixed contact 17,18,19 is easier to transfer on the electric arc guide rail.
Symbol table
1 load-break switch
2 fixed contact devices
3,4,5 fixed contacts
6 supports
7 motion contact making devices
8,9,10 motion contacts
11 switch shafts
12 supports
13 earthing contact devices
14,15,16 earthing contacts
17,18,19 fixed contact sides
20,21,22 earthing contact sides
23 permanent magnetic systems
24,25,26 permanent magnets
27,28,29 recessed dishes
30,31,32 cover plates
33,34,35 fixtures
36 follow the tracks of the contact
37 hinges
38 follow the tracks of the contact
38 hinges
40 permanent magnetic systems
41 steady pins
42 follow the tracks of the contact
43 hinges
44 permanent magnets
45 recessed dishes
46 follow the tracks of the contact
47 hinges
48 permanent magnetic systems
49 permanent magnets
50 recessed dishes
51 fixed areas
52 supporting areas
53,54 fixed heads
55,56 fixing holes
57,58 grooves
59 electric arc guide rails
60,61 connecting plates
62 locked grooves
63 essential parts
64 ends
65 hollow cylinder walls
66 cover plates
67 bezel ring,s
68 cover pieces
69,70,71 central through holes
72 buckling and locking devices
73,74 latch hooks
75 holes
76 grooves
The C movement locus
D first extreme position
E second extreme position
The preferred fixed position of F
G electric arc
I, II, III field regions
Claims (27)
1. the load-break switch of a gas-insulated sealed switchgear (1), it has at least one contact system, this contact system comprises a fixed contact device (2) and a motion contact making device (7) and a permanent magnetic system (23,40,44) that sets for fixed contact device (2), it is characterized by: permanent magnetic system (23,40,44) and fixed contact device (2) ground connection that is electrically connected is fixed on this fixed contact device (2) outside, makes the electric arc that forms when disconnecting load-break switch extend to permanent magnetic system.
2. according to the described load-break switch of claim 1, it is characterized by, described permanent magnetic system (23,40,44) is arranged as its bottom side and faces an electric arc that forms when the break contact system.
3. according to claim 1 or 2 described load-break switchs, it is characterized by, described permanent magnetic system (23,40,44) is located at outside described fixed contact device (2) by first extreme position (D) of the movement locus decision of motion contact making device and by in the zone between second extreme position (E) of fixed contact device decision.
4. according to the described load-break switch of claim 3, it is characterized by, described permanent magnetic system (44) comprises an annular magnet and is set to, and makes it center on described fixed contact (3,4,5).
5. according to claim 3 or 4 described load-break switchs, it is characterized by, described permanent magnetic system (23) is set to the angle between 65 ° and 75 ° that is oriented with respect to fixed contact device (2).
6. according to the described load-break switch of one of all claims in prostatitis, it is characterized by, on motion contact making device (7), hingedly be provided with one and follow the tracks of contact (36,38,42,46), before a limit switch off angle that reaches between fixed contact device (2) and the motion contact making device (7), be electrically connected following the tracks of to constitute between contact (36,38,42,46) and the permanent magnetic system (23,40,44), and then disconnect being electrically connected between tracking contact (36,38,42,46) and the permanent magnetic system (23,40,44) during greater than this limit switch off angle in the disconnection angle.
7. according to the described load-break switch of claim 6, it is characterized by, described tracking contact (36,38,42,46) abuts on the fixed contact device (2) when contact system is closed, and when contact system disconnects with situation that fixed contact device (2) keeps being electrically connected under change and is connected on the permanent magnetic system (23,40,44), and when reaching capacity switch off angle, cancel electrical connection.
8. according to the described load-break switch of claim 6, it is characterized by, described tracking contact (36,38,42,46) abut on the permanent magnetic system (23,40,44) when contact system is closed, and cancellation is electrically connected when reaching capacity switch off angle.
9. the load-break switch of a gas-insulated sealed switchgear (1), it has at least one contact system, this contact system comprises a fixed contact device (2) and a motion contact making device (7) and a permanent magnetic system (48), it is characterized by: on motion contact making device (7), hingedly be provided with one and follow the tracks of contact (36,38,42,46), this tracking contact has permanent magnetic system (48) disposed thereon, before a limit switch off angle that reaches between fixed contact device (2) and the motion contact making device (7), following the tracks of contact (36,38,42,46) with between the fixed contact device (2) constitute and be electrically connected, and when disconnecting angle, then disconnect and follow the tracks of contact (36 greater than this limit switch off angle, 38,42,46) with fixed contact device (2) between be electrically connected.
10. according to the described load-break switch of one of all claims in prostatitis, it is characterized by, described permanent magnetic system (23,40,44,48) comprises a rotational symmetric permanent magnet (24,25,26,44,49), and this permanent magnet is inserted in the shell (27,28,29,45,50) of electric conducting material system.
11. according to the described load-break switch of claim 10, it is characterized by, described shell (27,28,29,45,50) is a recessed dish (27,28,29,45,50) that constitutes with nonmagnetic metal and is facing those sides shielding permanent magnets (24,25,26,44,49) of electric arc.
12. according to the described load-break switch of claim 11, it is characterized by, recessed dish (27,28,29,45,50) seals by a cover plate (30,31,32) in the side back to electric arc.
13., it is characterized by the permanent magnet (49) that shell (50) is designed to ring-type and holds an annular according to the described load-break switch of claim 10.
14. according to the described load-break switch of claim 10, it is characterized by, one fixture (33) has one permanent magnetic system (23) is fixed on the fixed area (51) on separately the fixed contact device (2) and a supporting area (52) that is used for permanent magnetic system (23) shell (63,66) is arranged, wherein, described supporting area (52) comprises an electric arc guide rail (59).
15. according to the described load-break switch of claim 14, it is characterized by, shell (63,66) comprises that an essential part (63) that an end (64) and a hollow cylinder wall (65) arranged and diameter less than the cover plate (66) of hollow cylinder wall (65), establish central through hole (70,71) in essential part (63) and in the cover plate (66).
16. according to the described load-break switch in one of claim 14 or 15, it is characterized by, if insulating lid (67,68) that is used for permanent magnetic system (23), it comprises the bezel ring, (67) and the cover piece (68) that have a groove (76), and they can be by buckling and locking device (72,73,74) difference kayser on fixture (33,57,58,62).
17. according to the described load-break switch of one of claim 10 to 16, it is characterized by, permanent magnet (24,25,26,44,49) is the annular magnet of axial magnetized.
18. according to the described load-break switch of one of claim 10 to 16, it is characterized by, permanent magnet (24,25,26,44,49) is the annular magnet of diametrical magnetization.
19. according to the described load-break switch of one of claim 10 to 18, it is characterized by, permanent magnet (24,25,26,44,49) is made of neodymium ferro-boron compound.
20. according to the described load-break switch of one of claim 10 to 18, it is characterized by, permanent magnet (24,25,26,44,49) is made of the SmCo compound.
21. according to the described load-break switch of one of claim 10 to 18, it is characterized by, permanent magnet (24,25,26,44,49) is made of hard ferrite.
22. according to the described load-break switch of claim 21, it is characterized by, hard ferrite is a strontium ferrite.
23. according to the described load-break switch of claim 21, it is characterized by, hard ferrite is a barium ferrite.
24. permanent magnetic system (23) that is used for load-break switch, this load-break switch is used for a gas-insulated sealed switchgear, it has at least one contact system, this contact system comprises a fixed contact device (2) and a motion contact making device (7), and set this permanent magnetic system for fixed contact device (2), it is characterized by: this perseverance magnetic system (23) has an external fixation device (33), be used for permanent magnetic system (23) is fixed on separately fixed contact device (2), and be used for and being electrically connected of fixed contact device (2).
25. according to the described permanent magnetic system of claim 24, it is characterized by, described external fixation device (33) has one permanent magnetic system (23) is fixed on the fixed area (51) on separately the fixed contact device (2) and a supporting area (52) that is used for permanent magnetic system (23) shell (63,66) is arranged, wherein, described supporting area (52) comprises an electric arc guide rail (59).
26. according to the described permanent magnetic system of claim 25, it is characterized by, described shell (63,66) comprises that an essential part (63) that an end (64) and a hollow cylinder wall (65) arranged and diameter less than the cover plate (66) of hollow cylinder wall (65), are provided with a central through hole (70,71) in essential part (63) and in the cover plate (66).
27. according to the described permanent magnetic system in one of claim 25 or 26, it is characterized by, be provided with an insulating lid (67,68) that is used for permanent magnetic system (23), this insulating lid comprises the bezel ring, (67) and the cover piece (68) that have a groove (76), and they can be by buckling and locking device (72,73,74) kayser on fixture (33,57,58,62).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005060633.4 | 2005-12-13 | ||
| DE102005060633A DE102005060633A1 (en) | 2005-12-13 | 2005-12-13 | Switch-disconnector for an enclosed switchgear |
| PCT/EP2006/069594 WO2007068693A1 (en) | 2005-12-13 | 2006-12-12 | Load interrupter for an encapsulated switchgear and permanent magnet system for a load interrupter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101331572A true CN101331572A (en) | 2008-12-24 |
| CN101331572B CN101331572B (en) | 2012-12-05 |
Family
ID=37775219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680046885.2A Active CN101331572B (en) | 2005-12-13 | 2006-12-12 | Load interrupter for an encapsulated switchgear and permanent magnet system for a load interrupter |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1961027B1 (en) |
| CN (1) | CN101331572B (en) |
| DE (1) | DE102005060633A1 (en) |
| ES (1) | ES2437580T3 (en) |
| HK (1) | HK1124169A1 (en) |
| NO (1) | NO340194B1 (en) |
| WO (1) | WO2007068693A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522252A (en) * | 2011-12-19 | 2012-06-27 | 中国西电电气股份有限公司 | Fracture structure of non-SF6 gas-insulated metal-enclosed isolating switch |
| CN103280368A (en) * | 2013-06-13 | 2013-09-04 | 北京合纵科沃尔电力科技有限公司 | Magnetic quenching SF6 three-position load switch |
| CN106218742A (en) * | 2016-08-18 | 2016-12-14 | 国网湖南省电力公司带电作业中心 | The load-switch automobile built for the bypass of agriculture distribution line and application process thereof |
| CN110944870A (en) * | 2017-08-01 | 2020-03-31 | 瓦尔特克劳斯有限公司 | Residual load isolating switch |
| CN113826181A (en) * | 2019-03-29 | 2021-12-21 | 西门子股份公司 | Optimized three-position switch |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008015463B3 (en) * | 2008-03-18 | 2009-09-17 | Siemens Aktiengesellschaft | Permanent magnet extinguishing device for switch-disconnector |
| DE102012215479B4 (en) * | 2012-08-31 | 2014-08-21 | Siemens Aktiengesellschaft | Method for closing a switch and switch for carrying out the method |
| US9552951B2 (en) | 2015-03-06 | 2017-01-24 | Cooper Technologies Company | High voltage compact fusible disconnect switch device with magnetic arc deflection assembly |
| US9601297B2 (en) | 2015-03-23 | 2017-03-21 | Cooper Technologies Company | High voltage compact fuse assembly with magnetic arc deflection |
| US10854414B2 (en) | 2016-05-11 | 2020-12-01 | Eaton Intelligent Power Limited | High voltage electrical disconnect device with magnetic arc deflection assembly |
| US10636607B2 (en) | 2017-12-27 | 2020-04-28 | Eaton Intelligent Power Limited | High voltage compact fused disconnect switch device with bi-directional magnetic arc deflection assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58117621A (en) * | 1981-12-30 | 1983-07-13 | 株式会社安川電機 | Rotary arc type gas breaker |
| FR2618251B1 (en) | 1987-06-25 | 1989-11-17 | Merlin Gerin | ROTARY SWITCH WITH MIGRATION CURVE TRACK OF AN ARC ROOT. |
| GB2218262B (en) * | 1988-05-07 | 1992-01-15 | George Francis Chrisp | Electric arc interrupter |
| GB2223880B (en) * | 1988-10-15 | 1992-01-02 | George Francis Chrisp | Electric arc interrupter |
| GB2224885B (en) * | 1988-11-12 | 1992-01-02 | George Francis Chrisp | Electric arc interrupter |
| FR2762710B1 (en) * | 1997-04-25 | 2003-05-30 | Soule Materiel Electr | ELECTRICAL SHUTDOWN DEVICE FOR LOW AND HIGH VOLTAGE |
-
2005
- 2005-12-13 DE DE102005060633A patent/DE102005060633A1/en not_active Withdrawn
-
2006
- 2006-12-12 EP EP06830547.3A patent/EP1961027B1/en active Active
- 2006-12-12 ES ES06830547.3T patent/ES2437580T3/en active Active
- 2006-12-12 CN CN200680046885.2A patent/CN101331572B/en active Active
- 2006-12-12 WO PCT/EP2006/069594 patent/WO2007068693A1/en active Application Filing
-
2008
- 2008-06-25 NO NO20082898A patent/NO340194B1/en unknown
-
2009
- 2009-05-06 HK HK09104181.2A patent/HK1124169A1/en unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522252A (en) * | 2011-12-19 | 2012-06-27 | 中国西电电气股份有限公司 | Fracture structure of non-SF6 gas-insulated metal-enclosed isolating switch |
| CN103280368A (en) * | 2013-06-13 | 2013-09-04 | 北京合纵科沃尔电力科技有限公司 | Magnetic quenching SF6 three-position load switch |
| CN103280368B (en) * | 2013-06-13 | 2015-10-28 | 北京合纵科沃尔电力科技有限公司 | The SF6 three-stations load switch of magnetic quenching |
| CN106218742A (en) * | 2016-08-18 | 2016-12-14 | 国网湖南省电力公司带电作业中心 | The load-switch automobile built for the bypass of agriculture distribution line and application process thereof |
| CN110944870A (en) * | 2017-08-01 | 2020-03-31 | 瓦尔特克劳斯有限公司 | Residual load isolating switch |
| CN110944870B (en) * | 2017-08-01 | 2023-11-03 | 瓦尔特克劳斯有限公司 | Residual load isolating switch |
| CN113826181A (en) * | 2019-03-29 | 2021-12-21 | 西门子股份公司 | Optimized three-position switch |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1124169A1 (en) | 2009-07-03 |
| NO20082898L (en) | 2008-09-08 |
| DE102005060633A1 (en) | 2007-06-14 |
| WO2007068693A1 (en) | 2007-06-21 |
| NO340194B1 (en) | 2017-03-20 |
| EP1961027A1 (en) | 2008-08-27 |
| EP1961027B1 (en) | 2013-11-13 |
| ES2437580T3 (en) | 2014-01-13 |
| CN101331572B (en) | 2012-12-05 |
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