CN101331572B - 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
- CN101331572B CN101331572B CN200680046885.2A CN200680046885A CN101331572B CN 101331572 B CN101331572 B CN 101331572B CN 200680046885 A CN200680046885 A CN 200680046885A CN 101331572 B CN101331572 B CN 101331572B
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- Prior art keywords
- contact
- permanent magnetic
- magnetic system
- fixed contact
- break switch
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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 said layout of permanent magnet forms when causing the break contact system moves by this way; Promptly; Point moves in the shadow positions (Schattenlage) on the fixed contact device through the magnetic air blast at the bottom of making electric arc, prevents restriking after current over-zero electric arc extinguishes naturally thus.
The objective of the invention is, the load-break switch of the said type of design preface makes it when switching capability is strong, to have 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 breaking off 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 can permanent magnetic system be placed in its outside because the fixed contact device need not particular design with simple mode.
By another preferred design, permanent magnetic system is arranged as its bottom side and faces the 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 with 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 with 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 shifted to permanent magnetic system from the fixed contact device with simple mode equally.
By favourable the further developing of the present invention, permanent magnetic system is set to the angle between 65 ° and 75 ° that is oriented with respect to the fixed contact device.Through 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 break off 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 breaks off 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 be designed with to be beneficial to prevent that fully 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 can permanent magnetic system be located on the tracking contact easily because the fixed contact device need not particular design with 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 through 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 when the break contact system, forms thus, thereby forces electric arc along rotational symmetric permanent magnet rotation, in this case; Can stop the destruction to permanent magnet with simple mode on the one hand through shell, then easy on the other hand formation is electrically connected with the fixed contact device.
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 through the iron yoke.
By another kind of preferred form of implementation, enclosure 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 a supporting area that permanent magnetic system is fixed on the fixed area on the fixed contact device separately and 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; Advantageous particularly ground has formed an electric arc guide rail through supporting area on the other hand, thereby permanent magnetic system and especially shell are prevented by electrical arc erosion through the electric arc guide rail of 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 supported through following measures advantageous particularly ground, that is, cover plate has different radiuses with the hollow cylinder wall, thereby between them, form the gap that further strengthens radial magnetic field.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.Adopting this insulating lid is that permanent magnetic system and shell provide more favourable protection; The plastic insulating lid because electric arc can not burn; In this case can be advantageously through being in the groove in the fixed contact device zone at confined state, with one in the motion contact when fixed contact is separated the electric arc of formation transfer to easily on the electric arc guide rail.
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 up 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 up 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 up of hard ferrite.Hard ferrite advantageously makes the permanent magnet of processing with low cost.Preferred especially 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, and 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 permanent magnetic system is fixed on the fixed contact device separately and is 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 the fixed contact device separately 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 representes by accompanying drawing and accompanying drawing below elaborates to the present invention.
Wherein:
Fig. 1 representes 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 representes the permanent magnetic system permanent magnet detail drawing that can in the form of implementation of Fig. 1, use;
Fig. 4 representes the view by the another kind of embodiment of load-break switch of the present invention;
Fig. 5 representes by the another kind of form of implementation of load-break switch of the present invention;
Fig. 6 representes by the another kind of form of implementation of load-break switch of the present invention;
Fig. 7 representes by the another kind of form of implementation of load-break switch of the present invention;
Fig. 8 representes by the another kind of form of implementation of load-break switch of the present invention;
Fig. 9 representes by the another kind of form of implementation of load-break switch of the present invention;
Figure 10 representes by the another kind of form of implementation of load-break switch of the present invention;
Figure 11 representes by permanent magnetic system exploded view of the present invention;
Figure 12 representes the permanent magnetic system birds-eye perspective that assembles by the present invention of Figure 11; And
Figure 13 representes the permanent magnetic system bottom perspective view that assembles by the present invention of Figure 11.
Fig. 1 representes 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 representes 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 through 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 through drive unit with switch shaft 11; Then in this separation process, motion contact 8,9,10 and fixed contact 3,4, form electric arc between 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 through the permanent magnetic system 23 on the fixed contact device 2.
Fig. 2 representes 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 is fixed on the fixed contact 3 with cover plate 30 by retaining element 33 and sets up with it and is 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 on recessed dish, burns away.Through being contained in permanent magnet 24 and the magnetic field thereof in the recessed dish 27, power of effect forces electric arc on a circuit orbit, to rotate thus on electric arc.Along a circular surface rotation, degrade the localized burn or the part that have significantly reduced material, and guarantee when ensuing current over-zero, reliably to extinguish through electric arc.
Fig. 3 representes 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.Can be found out by Fig. 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 representes 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.Said movement locus C has determined below first extreme position D, by it confirm permanent magnetic system 23 from the motion contact 8 nearest positions.Confirm second extreme position E through fixed contact 3, nearest when permanent magnetic system 23 is fixed on this position from fixed contact 3.D and E in the position, 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.
Through the position F that angle [alpha] is confirmed, mean 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 between 65 ° and 75 °, select with respect to fixed contact device 2 directed angle [alpha].
Fig. 5 representes 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 representes the another kind of form of implementation by load-break switch 1 of the present invention, wherein on motion contact 8, follows the tracks of contacts 36 by hinged one of hinge 37.Dotting the motion contact of contact system when closed, is the motion contact when contact system breaks off 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 being made up of 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 representes 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.On fixed contact 3, establish to the side direction partition distance a permanent magnetic system 40, 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; In motion contact 8 when separating with fixed contact 3, follow the tracks of that contact 38 is final opened with permanent magnetic system in 40 minutes, 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; Said electrical connection is broken off, and follows the tracks of the arc burning between contact 42 and the permanent magnetic system 23 and when current over-zero next time, extinguishes.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 representes 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 when current over-zero next time, extinguish.
Figure 10 representes 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 through hinge 47 and not shown elastic component and stop portion.Following the tracks of a fixing permanent magnetic system 48 on the 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 same surface along recessed dish 50, magnetic field that this electric arc produces based on permanent magnet 49 rotates and when current over-zero next time, extinguishes.Tracking contact 46 and permanent magnetic system when the contact system disconnection is represented in tracking contact 46 and permanent magnetic system when dotting the contact system closure, solid line.
Fig. 2 and 4 gives an example until 10 and representes the configuration by 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 representes the exploded view by permanent magnetic system 23 of the present invention, and this perseverance magnetic system is as shown in Figure 1 to be arranged on the fixed contact 17,18,19.Fixture 33 has one permanent magnetic system 23 is fixed on fixed area 51 and a supporting area 52 on the fixed contact device separately.Here, fixed area 51 is made up of two fixed heads 53,54, and said fixed head has fixing hole 55 and 56, and fixture 33 is screwed on fixed contact separately through fixing hole.In addition, also be shaped on groove 57,58 at fixed area 51, they are given for installs the cover piece that hereinafter will be explained.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 through connecting plate 60,61, in connecting plate 60,61, is shaped on locked groove, can only see one of them locked groove 62 in the drawings.Permanent magnet 24 is contained in the shell; This shell is made up of an essential part 63 and a cover plate 66 that comprises the end 64 and hollow cylinder wall 65; So permanent magnet 24 is covered by shell basically fully; Here, use iron by the shell that essential part 63 and cover plate 66 are formed, thereby constitute the iron yoke of permanent magnetic system through 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, through 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 processing by plastics 67 and the over cap of cover piece 68 regulations as 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 can whole device be fixed on the fixture 33.Bezel ring, 67 is locked in their locked groove 62 on the fixture 33 by latch hook 73,74 equally; Thereby constitute the protecting cover of permanent magnetic system by bezel ring, 67 and cover piece 68; Wherein bezel ring, 67 has a front hole 75; Its radius is corresponding with the outer radius of electric arc guide rail 59, and the radius of cover piece 68 is corresponding with the inside radius of electric arc guide rail 59, so can cover the permanent magnetic system 63 except that electric arc guide rail 59 through bezel ring, 67 and cover piece 68.
Figure 12 representes 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.
The bottom perspective view of the permanent magnetic system that Figure 13 representes to have made up, the wherein visible electric arc guide rail 59 that between bezel ring, 67 and cover piece 68, constitutes by supporting area 52.Can find out the groove 76 of bezel ring, 67 by 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 tracking contacts
37 hinges
38 tracking contacts
38 hinges
40 permanent magnetic systems
41 steady pins
42 tracking contacts
43 hinges
44 permanent magnets
45 recessed dishes
46 tracking contacts
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 (26)
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 the motion contact making device (7) and a permanent magnetic system (23,40,44) that sets for fixed contact device (2) that can be connected with said fixed contact device (2) foundation conduction by the drive unit revolution; Wherein, This perseverance magnetic system (23,40,44) has each permanent magnet of each fixed contact (3,4,5) that is respectively applied for said fixed contact device (2); It is characterized by: permanent magnetic system (23,40,44) said fixed contact device (2) outside be located at by first extreme position (D) of the movement locus decision of motion contact making device with by the zone between second extreme position (E) of fixed contact device decision in and with fixed contact device (2) ground connection the fixing that be electrically connected, the electric arc that forms during feasible disconnection load-break switch extends to permanent magnetic system.
2. according to the described load-break switch of claim 1, it is characterized by, said permanent magnetic system (23,40,44) is arranged to its bottom side towards the electric arc that forms when the break contact system.
3. according to the described load-break switch of claim 2, it is characterized by, said permanent magnetic system (44) comprises an annular magnet and is set to, and makes it center on said fixed contact (3,4,5).
4. according to the described load-break switch of one of claim 1 to 3, it is characterized by, said permanent magnetic system (23) is set to the angle between 65 ° and 75 ° that is oriented with respect to fixed contact device (2).
5. according to the described load-break switch of one of claim 1 to 3; 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 break off 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.
6. according to the described load-break switch of claim 5; It is characterized by; Said tracking contact (36,38,42,46) abuts on the fixed contact device (2) when contact system is closed; And when contact system breaks off, be connected on the permanent magnetic system (23,40,44) with the conversion that is electrically connected of fixed contact device (2) in order to keep, and cancellation is electrically connected when reaching capacity switch off angle.
7. according to the described load-break switch of claim 5, it is characterized by, said 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.
8. the load-break switch of a sealed switchgear (1); It has at least one contact system; It 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 the permanent magnetic system (48) that is arranged on it; 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 fixed contact device (2), and then break off being electrically connected between tracking contact (36,38,42,46) and the fixed contact device (2) during greater than this limit switch off angle in the disconnection angle.
9. according to the described load-break switch of claim 8; It is characterized by; Said permanent magnetic system (23,40,44,48) comprises a rotational symmetric permanent magnet (24,25,26,44,49), and it is inserted in the shell (27,28,29,45,50) of electric conducting material system.
10. according to the described load-break switch of claim 9; It is characterized by, said 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.
11. according to the described load-break switch of claim 10, it is characterized by, recessed dish (27,28,29,45,50) seals by cover plate (30,31,32) in the side back to electric arc.
12., 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 9.
13. according to the described load-break switch of claim 9; It is characterized by; One fixture (33) has one permanent magnetic system (23) is fixed on the fixed area (51) on the fixed contact device (2) separately and a supporting area (52) that is used for permanent magnetic system (23) shell (63,66) is arranged, and this supporting area (52) comprises an electric arc guide rail (59).
14. according to the described load-break switch of claim 13; It is characterized by; Shell (63,66) comprises that an essential part (63) that the end (64) and 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 cover plate (66).
15. according to claim 13 or 14 described load-break switchs; 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 groove (76), they can be respectively by buckling and locking device (72,73,74) kayser on fixture (33,57,58,62).
16. according to the described load-break switch of one of claim 9 to 14, it is characterized by, permanent magnet (24,25,26,44,49) is the annular magnet of axial magnetized.
17. according to the described load-break switch of one of claim 9 to 14, it is characterized by, permanent magnet (24,25,26,44,49) is the annular magnet of diametrical magnetization.
18. according to the described load-break switch of one of claim 9 to 14, it is characterized by, permanent magnet (24,25,26,44,49) is made up of neodymium ferro-boron compound.
19. according to the described load-break switch of one of claim 9 to 14, it is characterized by, permanent magnet (24,25,26,44,49) is made up of the SmCo compound.
20. according to the described load-break switch of one of claim 9 to 14, it is characterized by, permanent magnet (24,25,26,44,49) is made up of hard ferrite.
21. according to the described load-break switch of claim 20, it is characterized by, hard ferrite is a strontium ferrite.
22. according to the described load-break switch of claim 20, it is characterized by, hard ferrite is a barium ferrite.
23. 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; Comprise a fixed contact device (2) and a motion contact making device (7), for fixed contact device (2) sets this permanent magnetic system, it is characterized by: this perseverance magnetic system (23) has external fixation device (33) to be used for that permanent magnetic system (23) is fixed on separately fixed contact device (2) to go up and be used for being electrically connected with fixed contact device (2).
24. according to the described permanent magnetic system of claim 23; It is characterized by; Said external fixation device (33) has one permanent magnetic system (23) is fixed on the fixed area (51) on the fixed contact device (2) separately and a supporting area (52) that is used for permanent magnetic system (23) shell (63,66) is arranged; Wherein, said supporting area (52) comprises electric arc guide rail (59).
25. according to the described permanent magnetic system of claim 24; It is characterized by; Said shell (63,66) comprises that an essential part (63) that the end (64) and 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 cover plate (66).
26. according to claim 24 or 25 described permanent magnetic systems; It is characterized by; Be provided with an 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 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 CN101331572A (en) | 2008-12-24 |
CN101331572B true 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) |
Families Citing this family (11)
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 |
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 |
DE102012215479B4 (en) | 2012-08-31 | 2014-08-21 | Siemens Aktiengesellschaft | Method for closing a switch and switch for carrying out the method |
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 |
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 |
CN106218742B (en) * | 2016-08-18 | 2017-08-11 | 国网湖南省电力公司带电作业中心 | The load-switch automobile and its application process built are bypassed for agriculture distribution line |
DE202017104597U1 (en) * | 2017-08-01 | 2018-11-13 | Walter Kraus Gmbh | Residual load-break switch |
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 |
EP3928344B1 (en) | 2019-03-29 | 2023-02-15 | Siemens Aktiengesellschaft | Optimised three-position switch |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0088167A2 (en) * | 1981-12-30 | 1983-09-14 | Yaskawa Electric Mfg. Co., Ltd. | Rotary-arc type gas-filled switch |
GB2218262A (en) * | 1988-05-07 | 1989-11-08 | George Francis Chrisp | Electric arc interrupter |
GB2224885A (en) * | 1988-11-12 | 1990-05-16 | George Francis Chrisp | Electric arc interrupter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2618251B1 (en) | 1987-06-25 | 1989-11-17 | Merlin Gerin | ROTARY SWITCH WITH MIGRATION CURVE TRACK OF AN ARC ROOT. |
GB2223880B (en) * | 1988-10-15 | 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 CN CN200680046885.2A patent/CN101331572B/en active Active
- 2006-12-12 WO PCT/EP2006/069594 patent/WO2007068693A1/en active Application Filing
- 2006-12-12 ES ES06830547.3T patent/ES2437580T3/en active Active
- 2006-12-12 EP EP06830547.3A patent/EP1961027B1/en active Active
-
2008
- 2008-06-25 NO NO20082898A patent/NO340194B1/en unknown
-
2009
- 2009-05-06 HK HK09104181.2A patent/HK1124169A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0088167A2 (en) * | 1981-12-30 | 1983-09-14 | Yaskawa Electric Mfg. Co., Ltd. | Rotary-arc type gas-filled switch |
GB2218262A (en) * | 1988-05-07 | 1989-11-08 | George Francis Chrisp | Electric arc interrupter |
GB2224885A (en) * | 1988-11-12 | 1990-05-16 | George Francis Chrisp | Electric arc interrupter |
Also Published As
Publication number | Publication date |
---|---|
HK1124169A1 (en) | 2009-07-03 |
EP1961027A1 (en) | 2008-08-27 |
ES2437580T3 (en) | 2014-01-13 |
WO2007068693A1 (en) | 2007-06-21 |
NO20082898L (en) | 2008-09-08 |
DE102005060633A1 (en) | 2007-06-14 |
NO340194B1 (en) | 2017-03-20 |
EP1961027B1 (en) | 2013-11-13 |
CN101331572A (en) | 2008-12-24 |
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