EP0008513A1 - Schalteranordnung für ein dreiphasiges Elektrizitätsnetz - Google Patents

Schalteranordnung für ein dreiphasiges Elektrizitätsnetz Download PDF

Info

Publication number
EP0008513A1
EP0008513A1 EP79301601A EP79301601A EP0008513A1 EP 0008513 A1 EP0008513 A1 EP 0008513A1 EP 79301601 A EP79301601 A EP 79301601A EP 79301601 A EP79301601 A EP 79301601A EP 0008513 A1 EP0008513 A1 EP 0008513A1
Authority
EP
European Patent Office
Prior art keywords
terminals
fixed
switching
input
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP79301601A
Other languages
English (en)
French (fr)
Inventor
George Caton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0008513A1 publication Critical patent/EP0008513A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • 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
    • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing

Definitions

  • This invention relates to a switch arrangement for use with a three-phase electrical supply.
  • the arrangement finds utility in this field generally, but is particularly suitable for high power applications, that is for industrial or electrical supply distribution.
  • the arrangement can incorporate either a conventional switch device or a circuit breaker device.
  • Conventional high power three-phase switchgear commonly comprises feeder circuits supplying current to three fixed input terminals, one.for each phase, and busbar circuits each connected to one of three fixed output terminals, one for each phase.
  • Switching means are provided for connecting the input terminals to the output terminals, and the switching means may be a conventional switch device or, more commonly, a circuit breaker device.
  • both the feeder circuits and the busbar circuits may be isolated with no electrical connections made thereto.
  • the switching means is contained in a movable housing which is separate from a stationary housing containing the feeder circuits and busbar circuits. When earthing of the feeder circuits or . isolation of both circuits is required the movable housing has been withdrawn from the stationary housing, the earthing or isolation has been effected and then any required work on the earthed or isolated circuits carried out.
  • Other arrangements employ series-connected isolating switches, usually in separate compartments, and these switches are often provided with alternative earthirgcontacts so that the feeder circuits may be isolated from the busbar circuits and subsequently connected to earth.
  • the objective of the present invention is to provide a simplified arrangement whereby isolation and/or earthing can be effected, and in general wherein two or more alternative switching positions are made possible i: a simple manner.
  • a switch arrangement for making and breaking a three-phase electrical supply comprises an enclosure wherein are situated three spaced fixed input terminals, one for each phase, three spaced fixed output terminals, one for each phase, and an elongated switch device extending through the enclosure and mounted for rotation therein; the switch device comprising a housing having on the outer surface thereof three spaced switching input terminals, one for each phase, and three spaced switch-, ing output terminals, one for each phase, each of the switching terminals being connected with a respective one of three input and three output contacts within the housing and switching means movable within the housing to make or break simultaneously electrical connections between the input and output contacts of each-phase; and means for rotating the switch device between a first angular position wherein the fixed input and the switching input terminals are in electrical contact and the fixed output and the switching output terminals are in electrical contact, and a second angular position wherein the fixed and switching input terminals or the fixed and switching output terminals, or both, are out of electrical contact.
  • the switching means movable within the housing are operative to make or break the connection between the input terminals and the output terminals, so controlling the main supply, which will usually be from feeder circuits connected to the fixed input terminals, to busbar circuits or other means connected to the fixed output terminals, although other arrangements are, of course, possible.
  • the switch device can be moved to the second position, which may be one in which both the fixed input and switching terminals and the fixed output and switching terminals are out of electrical contact, so that in this position both the input and output are isolated.
  • the switch device may further be rotated to a third position wherein the device connects the switching input terminals to the fixed input terminals and the switching output terminals to respective ones of three spaced earth terminals, one for each phase, so enabling the input to be earthed through operation Q f the switching means.
  • the isolating position may be omitted or the switch device may have more than two angular positions and may be designed to have an isolating position, an earthing position and one or more operating positions wherein fixed input terminals are connected to a selected one of a number of sets of fixed output terminals.
  • the fixed input terminals are axially spaced apart on the enclosure, the fixed output terminals are axially spaced apart on the enclosure, the switching input terminals are axially spaced apart on the housing and the switching output terminals are axially spaced apart on the housing.
  • the fixed input terminals are then preferably diametrically opposite to their associated fixed output terminals with respect to the axis of the arrangement, and the switching input terminals are diametrically opposite to their associated switching output terminals on the outer surface of the housing.
  • a series of three axially spaced earth terminals are then desirably provided, angularly spaced-from the fixed output terminals and a series of three auxiliary fixed output terminals are provided diametrically opposite to the earth terminals, each auxiliary input terminal being electrically connected to an associated one of the main fixed input terminals.
  • the diametrically opposite switching input and output terminals enable connections to be made between the fixed input and output terminals
  • the diametrically opposite switching input and output terminals enable a connection to be made between the diametrically opposite auxiliary fixed input and earth terminals.
  • the switching input and output terminals can lie out of alignment with any of the fixed terminals in an isolating * position of the switch arrangement.
  • the fixed input . terminals are radially spaced apart on the enclosure, the fixed output terminals are radially spaced apart on the enclosure and are axially spaced from the fixed input terminals, the switching input terminals are radially spaced apart around the housing and the switching output terminals are radially spaced apart around the housing and are axially spaced from the switching input terminals.
  • each fixed input terminal is axially aligned with its associated fixed output terminal, each switching input terminal is axially aligned with its associated switching output terminal, the fixed and switching input terminals lie in a first common radial plane and the fixed and switching output terminals lie in a second common radial plane.
  • a series of three radially spaced earth terminals are then desirably provided, in the same radial plane as the fixed output terminals and angularly spaced therefrom, and a series of three radially spaced auxiliary fixed input terminals are provided, in the same radial plane as the fixed output terminals, angularly spaced therefrom and in axial alignment with the associated earth terminals.
  • the axially aligned switching input and output terminals enable connections to be made between the axially aligned fixed input and output terminals
  • the axially aligned switching input and output terminals enable a connection to be made between the axially aligned auxiliary fixed input and earth terminals.
  • the switching input and output terminals can lie out of contact with any of the fixed terminals in an isolating position of the switch arrangement.
  • the switch arrangement includes a first interlock which prevents rotation of the switch device unless the switching means is in a position where the connections between the input and output contacts of each phase are broken.
  • the switch device is mounted so that it may be withdrawn axially from the assembly, for example for inspection, maintenance or replacement, and there is a second interlock that prevents such withdrawal unless the switch device is in an angular position such that the input and output terminals are isolated. The presence of these interlocks ensures safe operation of the switch arrangement.
  • the switching-means comprises an insulating carrier extending axially through the housing, the carrier carrying three axially spaced bridging contacts, each associated with a respective one of the input contacts and a respective one of the output contacts and the carrier being axially movable from a first limit position wherein each bridging contact electrically connects the associated input and output contacts, to a second limit position during which movement each bridging contact slides axially out of engagement with either or both of the associated input and output contacts to break the electrical connections.
  • each input contact preferably has a main contact section and an arcing contact section and each bridging contact in moving from its first to its second limit position slides axially out of engagement first with the main contact section and then with the arcing contact section.
  • the interior of the housing is filled with an arc-quenching fluid
  • the carrier carries three axially spaced pistons, each positioned so as to direct a stream of the fluid across the space between an associated bridging contact and arcing contact section as the bridging contact is moved out of engagement with the arcing contact section.
  • the pistons may each be separate from the bridging contact, although it is possible for one or more of the pistons to be constituted by, or combined with, a bridging contact.
  • a switch arrangement comprises an assembly having side members 1 and 2 and an end member 'la. Secured to the side members 1 and 2 are lower angle strips 3 and 4 respectively which support three cross bars 5, 6 and 7 of insulating material. Standing below the cross bars are three current transformers 8, 9 and 10, one for each phase of a three-phase electrical supply. A fixed input terminal 11, 12 and 13 respectively is mounted on each of the cross bars 5 to 7 and is electrically connected to the respective current transformer. The fixed input terminals each have an auxiliary fixed terminal such as 14 supported from the respective cross bar and electrically connected to the associated fixed input terminal.
  • Upper angle elements 15 and 16 are also secured respectively to the side plates 1 and 2 and support three upper cross bars 17 to 19 again of insulating material.
  • Supported above the cross bars 17 are three output supply busbars 20, 21 and 22 respectively, one for each phase of the supply.
  • the cross bars 17 to 19 support fixed output terminals 23, 24 and 25 respectively, each output terminal being electrically connected to one of the busbars.
  • Three earth terminals such as 26 are mounted on carriers 27 on the side plate 2 and are electrically connected to earth through that side plate. Each earth terminal 26 lies in the same radial plane as its associated fixed input and output terminals and auxiliary terminal.
  • An end memeber 2a has angle elements 70 and 71 connected thereto, which are supported by slides 72 and 73 on angle elements 74 and 75 secured to the side members 1 and 2.
  • An elongated switch device 2B extends through the enclosure and is mounted for rotation therein by bearings 29 and 30 supported by the end plates la and the end member 2a. The device fits axially loosely within bearing 29, but is axially secured to the bearing 30.
  • the switch device comprises a generally tubular housing 31 made of insulating material.
  • the housing is closed at one end by an end assembly 32 incorporating a solenoid 33 and at the opposite end by an end assembly 34 incorporating a pressure-sealed tube 35, which extends through a solenoid 35a secured by means, not shown to the end plate la.
  • the housing has three input switching terminals, 36, 37, and 38, one for each phase of the three-phase electrical supply, arranged along one side thereof, the terminals being shielded from each other and from the end assemblies by fins 39 extending partially round the circumference of the housing.
  • the housing carries three output switching terminals 40, 41 and 42, one for each phase of the supply, and these terminals are similarly separated from each other and from the end assemblies by fins 43.
  • the input switching terminal 36 is electrically connected through the housing with an input contact 44, and the output switching terminal 40 is similarly connected through the wall of the housing to an output contact 45.
  • the input and output terminals 37 and 41 are connected respectively to input and output contacts 46 and 47, and the input and output terminals 38 and 42 are connected to respective input and output contacts 48 and 49.
  • an insulating carrier in the form of a shaft 50 which is supported for axial movement by linear bearings 51 and 52 housed in the respective end assemblies 32 and 34.
  • the shaft 50 carries ferro-magnetic cores 53 and 54 at the respective ends thereof, and these cores co-operate with the respective solenoids 33 and 35a.
  • the shaft 50 carries three bridging contacts 55, 56 and 57.
  • the contact 55 is designed electrically to connect the input and output contacts 44 and 45 of the first phase of the supply
  • the bridging contact 56 is designed electrically to connect the input and output contacts 46 and 47 of the second phase
  • the bridging contact 57 is designed electrically to connect the input and output contacts 48 and 49 of the third phase.
  • the switch is shown in this condition in Figure 1, with the shaft 50 in its extreme left-hand position.
  • Each of the bridging contacts 55 to 57 is in the form of a disc which is dished and is split into two or more laminations, e.g. the inner part 55a and the outer part 55b of contact 55.
  • the outer part 55b has an inturned rim 55c presenting a convex contact portion to the input and output contacts 44 and 45.
  • the inner part 55a is of a spring material exerting an outward force on the outer part 55b to maintain the bridging contact in good electrical connection with the input and output contacts 44 and 45.
  • each piston is a close fit within the bore of the housing and comprises a rigid disc such as 58a formed with a series of holes 58b therethrough, which holes are covered by a flexible flap valve 58c.
  • the interior of the housing is filled with an arc-quenching fluid, which may be either a liquid or a gas and is preferably sulphur hexafluoride.
  • a shaft 76 is secured to the ferro-magnetic core 53 and extends through a pressure seal 77 of the end assembly 32. At its free end the shaft 76 is pivoted at 77 to a lever 78 supported by a pivot 79 on a carrier 80 integral with or secured to the housing of the solenoid 33. A pin 81 is also pivoted to the lever 78 at 82, and the pin passes through a hole 83 in the carrier 80.
  • the extreme end of the lever 78 is formed with an open slot 84 in which engages a pin fixed to the end of a link 85 which may be connected to auxiliary switches and/or indicators.
  • An arcuate member 86 is secured towards the front of the housing, the member being shown in broken lines in Figure 1 so as not to obscure other detail.
  • the member 86 is provided with three holes 87, 88 and 89, any one of which may be engaged by the pin 81.
  • the pin 81 and the arrangement including lever 78 are not shown in Figure 1.
  • the arcuate member 86 is also formed with a slot 90 and the carrier 80 has an extension 91 which normally lies behind the arcuate member 86, but can be aligned with the slot 90 to pass axially therethrough.
  • a radially extending plate 92 formed with a slot 93 therein.
  • a bar 94 extends inwardly from the angle element 75 in a position to engage the slot 93.
  • the bar 94 extends along the length of the side member 1 from the front thereof but terminates short of the solenoid 35a so that when the switch device 28 is in the fully home position as shown in Figure 2 the plate 92 lies between the end of the bar 94 and the solenoid 35a so that the bar and plate do not engage and the switch device is free to rotate. However, if the switch device lies to the left of the fully home position as shown in Figure 2 the plate 92 engages the slot 93 in the bar 94 to prevent rotation of the switch device 28.
  • the lever 78 is pivoted anti-clockwise so that the pin 81 is withdrawn from the hole 81 in the arcuate member 86.
  • the switch device 28 is free to be rotated about the axis of the assembly and can be rotated from the central position shown in Figure 1 either anti-clockwise to an earthing position or clockwise to an isolating position. If moved to the earthing position the current transformers may then be earthed by energising the solenoid 35a, so moving the shaft 50 to the left and causing the bridging contacts again to make contact with the associated input and output contacts.
  • This arrangement also acts as a safety device controlling replacement of the switch device, which cannot be inserted unless slot 93 and bar 94 are axially aligned and part 91 and slot 90 are axially aligned. This ensures that the device can only be inserted in the isolating position of the switch.
  • the switch device itself may take any one of a number of forms and that described is purely by way of example.
  • the shaft need not be operated by two solenoids as described, but operation could be by way of a single solenoid only, operating in a push/pull manner.
  • the shaft 50 carrying the bridging contacts could be operated by hand or by pneumatic, hydraulic or mechanical actuating means, for example by an electric motor driving an operating screw. If required, operation may be by way of a spring assembly in either or both directions of the shaft, the springs being charged either by hand or by a power arrangement to give required operation when desired.
  • the device may comprise an elongated housing which contains three separate, individually sealed, single-pole vacuum modules, each of which makes and breaks the respective circuit by an axial movement of an operating member.
  • the internal arrangement of each module may take any convenient form and each module may have an internal vacuum to prevent arcing or cause rapid extinction of any arc that may be struck, or may contain gas, oil or other arc quenching medium.
  • the operating members of each module are then axially aligned and linked to each other by insulating connecting members within the housing, and are operated simultaneously by solenoids or other operating means at one or both ends of the housing.
  • FIG. 3 A further alternative switch device is shown in Figure 3, the device being rotatably mountable in a terminal assembly somewhat similar to that shown in Figures 1 and 2,although in the terminal assembly the fixed and auxiliary input terminals lie in a different radial plane to the associated fixed output and earth terminals.
  • the switch device shown in Figure 3 comprises an insulating housing 150 having end assemblies 151 and 152 in which are mounted solenoids l5la and 152a.
  • a carrier 154 extends through the housing and is supported by sliding bearings 155 and 156 at the two ends thereof, the carrier having at its ends ferro-magnetic cores 157 and 158 co-operating with the solenoids.
  • the carrier carries three bridging contact assemblies, which are identical for each of the three phases and only one will therefore be described. Similarly the fixed switching contacts are identical for each of the three phases and only one will be described.
  • Each phase incorporates a switching input terminal 159 and a switching output terminal 160.
  • the switching input terminal is electrically connected through the housing to an input contact 161.
  • This contact comprises an annular member 162 to which are secured and electrically connected a plurality of contacts such as 163 forming the main contact section of the input contact.
  • the inner periphery of the annular member 162 has a high melting point alloy insert 164 which forms an arcing contact section of the input contact.
  • An insulating shield 165 extends axially from the arcing contact section.
  • the carrier 154 at this region of the device includes a disc 166 forming a piston, from which a number of rods 167 project axially and extend through bores 168 in the annular member 162.
  • These rods support an electrically conducting sleeve 169 secured to an electrically conductive disc 170 having an annular insert 171.
  • This insert is in sliding electrical contact with an annular output contact 172 connected through the wall of the housing with the switching output terminal 160.
  • the disc 170 carries an axially extending electrically conductive probe 173.
  • the solenoid 152a is energised to drive the carrier from its right-hand limit position as shown to its left-hand limit position.
  • electrical contact is maintained between the part 170 of the bridging contact and the output contact 172.
  • the probe 173 of the bridging contact engages the arcing contact section 164 of the input contact and then the sleeve 169 of the bridging contact engages the contacts 163 forming the main contact section of the input contact. Electrical connection is thus established between the switching input terminal 159 and the switching output terminal 160.
  • the solenoid 157a is energised to drive the carrier 154 back to its extreme right-hand position.
  • the section 170 of the bridging contact acts as the piston for driving the arc-quenching medium across the arc of the next adjacent phase and similarly the section 170 of the bridging contact of that phase acts as the piston for driving arc-quenching medium across the arcing contacts of the final phase.
  • the arrangement shown in Figure 3 may be modified by substituting for the solenoid arrangement shown any of the operating arrangements described with reference to Figure 1.
  • Either the Figure 1 or the Figure 3 arrangement may also be modified by providing fluid relief arrangements within the wall of the housing or within the parts of the bridging contacts in order to ensure that pressure equalising is achieved while still obtaining the required flows of arc-quenching medium.
  • the housing may be formed by two concentric tubes defining an annular space therebetween, openings into the space from the interior of the inner tube being i provided at the ends of the tube and adjacent to each of the contacts.
  • the embodiment shown in Figure 3 can be constructed as a vacuum switch or vacuum circuit breaker, the housing 50 then being sealed and evacuated.
  • the switch arrangement comprises an enclosure 200 within which are situated three radially spaced fixed input terminals 201, 202 and 203.
  • Three corresponding fixed output terminals such as 204 are each axially aligned with a respective one of the fixed input terminals.
  • Three auxiliary fixed input terminals 205, 206 and 207 are located in the same radial plane as the fixed input terminals 201 to 203 and are radially spaced from those terminals.
  • the fixed input terminals and auxiliary fixed input terminals are electrically connected as pairs by connectors 208, 209 and 209a.
  • a set of three earth terminals (not shown) are provided on the enclosure in the same radial plane as the fixed output terminals 204, each earth terminal being axially aligned with a respective one of the auxiliary fixed input terminals 205 to 207.
  • An elongated switch device shown generally as 210 extends through the enclosure and is mounted for rotation therein by bearings such as 211.
  • the switch device comprises a housing 213 in which is included three switching modules 213 to 215, one for each phase of the supply.
  • the three modules are identical and only module 213 will be described in detail.
  • the module 213 is housed in an axial bore 216 within the housing 212 and extending through the housing into the bore is a switching input terminal 217 and a switching output terminal 218.
  • the switching input terminal 217 is electrically connected to a fixed contact arrangement shown generally as 219 which includes a main contact 220 of tubular construction and with short axial splits at the free end to give flexibility and a tubular, probe-like arcing contact 221.
  • the switching output terminal 218 is electrically connected to an annulus . 222 having a sliding contact 223.
  • the bore 216 also houses a moving contact formed by a conducting tube 224 which is in sliding engagement with the contact 223.
  • the tube carries a main contact head 225 connected to the tube by radial spokes, and a sealing ring 226 is located between the head and the bore 216.
  • the head 225 has a contact face 227 which can engage the inner surface of the main contact 220.
  • the tube 224 also carries an auxiliary arcing contact 228 which can engage the outer surface of the end of the arcing contact 221, and an insulating shield 228a which slides around the fixed arcing contact 221,and which is of a streamlined shape.
  • the tube 224 is connected by insulating links to an operating mechanism (not shown) which is located within the housing 212, the mechanism. being operative to move the shaft 224 axially and thus to move the contacts 227 and 228 from the solid line position in Figure 5 to the broken line position-in that Figure.
  • each module is identical in construction and each has its associated switching input terminal 217, 217a, 217b, and switching output terminal such as 218.
  • the switching input terminals for modules 214 and 215 are shown as 217a and 217b in Figure 4: All the switching input terminals 217 lie in the same radial . plane as the fixed input terminals and auxiliary fixed input terminals, and all the switching output terminals 218 lie in the same radial plane as the fixed output terminals 204 and earth terminals.
  • the shafts 224 of each of the three switch modules are moved axially by a common operating mechanism. This mechanism may take any suitable form.
  • the mode of operation of the switch arrangement may then be changed by rotating the switch device 210.
  • Rotation in an anti-clockwise direction as shown in Figure 4 will cause the switching input terminals to make contact with the auxiliary fixed input terminals and will cause the switching output terminals to make contact with the earth terminals.
  • the switches for each phase are now closed the input circuits are connected to earth.
  • the switch device 210 were to be rotated clockwise from the direction shown in Figure 4 the switching input and switching output terminals would be moved to a position whereby they are electrically isolated from any of the terminals on the enclosure. The circuit inputs and outputs are thus isolated one from the other.
  • FIG. 6 shows application of the invention to yet a different arrangement of circuit breaker having an elongated switch device shown generally as 229 having three switching modules 230 to 232 arranged in side by side relationship.
  • Each of the modules may include a switching arrangement identical to that described in Figure 5 or of any other convenient form.
  • Each module has a switching input contact 233, 234 and 235 respectively, all of which lie in a common radial plane, axially aligned with a respective switching output contact, which contacts also lie in a second common radial plane.
  • the switch device shown in Figure 6 may be incorporated in a housing similar to that shown in Figures 4 and 5 and having fixed input terminals, auxiliary fixed input terminals, fixed output terminals and earth terminals.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP79301601A 1978-08-18 1979-08-07 Schalteranordnung für ein dreiphasiges Elektrizitätsnetz Withdrawn EP0008513A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB7833812 1978-08-18
GB3381278 1978-08-18
GB7914376 1979-04-25
GB7914376 1979-04-25

Publications (1)

Publication Number Publication Date
EP0008513A1 true EP0008513A1 (de) 1980-03-05

Family

ID=26268591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301601A Withdrawn EP0008513A1 (de) 1978-08-18 1979-08-07 Schalteranordnung für ein dreiphasiges Elektrizitätsnetz

Country Status (2)

Country Link
EP (1) EP0008513A1 (de)
AU (1) AU4986479A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595003A1 (fr) * 1986-02-27 1987-08-28 Merlin Gerin Appareillage electrique multipolaire a enveloppe commune et a isolement gazeux
FR2645342A1 (fr) * 1989-03-20 1990-10-05 Eb Distribusjon Interrupteur de puissance a isolant gazeux et boitier rotatif
EP2909855A4 (de) * 2012-10-19 2016-06-15 Jan Karlsson Vorrichtung zum schnellen kurzschliessen und erden der phasen in einem versorgungsnetz
CN105938774A (zh) * 2016-06-28 2016-09-14 广东广特电气股份有限公司 一种旋转式双断口负荷开关
CN107845537A (zh) * 2017-11-13 2018-03-27 上海天灵开关厂有限公司 一种电动接地刀闭锁装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107994463B (zh) * 2017-12-01 2023-08-22 国网浙江杭州市富阳区供电有限公司 一种接地稳定的智能保护接地箱

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB249250A (en) * 1925-01-07 1926-03-25 Callenders Cable & Const Co Improvements in or relating to electric switches
DE1225736B (de) * 1960-10-21 1966-09-29 Licentia Gmbh Dreipoliger Druckgasschalter fuer mittlere Spannungen
FR1533266A (fr) * 1967-05-18 1968-07-19 Alsthom Cgee Cellule blindée d'encombrement réduit pour ensemble préfabriqué
DE2721258A1 (de) * 1977-05-11 1978-11-23 Siemens Ag Elektrisches schaltfeld
EP0005209A1 (de) * 1978-04-28 1979-11-14 Siemens Aktiengesellschaft Schalterkombination für Sammelschienenanlagen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB249250A (en) * 1925-01-07 1926-03-25 Callenders Cable & Const Co Improvements in or relating to electric switches
DE1225736B (de) * 1960-10-21 1966-09-29 Licentia Gmbh Dreipoliger Druckgasschalter fuer mittlere Spannungen
FR1533266A (fr) * 1967-05-18 1968-07-19 Alsthom Cgee Cellule blindée d'encombrement réduit pour ensemble préfabriqué
DE2721258A1 (de) * 1977-05-11 1978-11-23 Siemens Ag Elektrisches schaltfeld
EP0005209A1 (de) * 1978-04-28 1979-11-14 Siemens Aktiengesellschaft Schalterkombination für Sammelschienenanlagen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595003A1 (fr) * 1986-02-27 1987-08-28 Merlin Gerin Appareillage electrique multipolaire a enveloppe commune et a isolement gazeux
FR2645342A1 (fr) * 1989-03-20 1990-10-05 Eb Distribusjon Interrupteur de puissance a isolant gazeux et boitier rotatif
EP2909855A4 (de) * 2012-10-19 2016-06-15 Jan Karlsson Vorrichtung zum schnellen kurzschliessen und erden der phasen in einem versorgungsnetz
CN105938774A (zh) * 2016-06-28 2016-09-14 广东广特电气股份有限公司 一种旋转式双断口负荷开关
CN107845537A (zh) * 2017-11-13 2018-03-27 上海天灵开关厂有限公司 一种电动接地刀闭锁装置

Also Published As

Publication number Publication date
AU4986479A (en) 1980-02-21

Similar Documents

Publication Publication Date Title
US7829814B2 (en) Vacuum circuit interrupter grounding assembly
US7250583B2 (en) Gas-insulated switchgear device
US9196439B2 (en) Vacuum interrupter arrangement for a circuit breaker
US4500762A (en) Resistor-type disconnecting switch for circuit breaker
US3339118A (en) Metal enclosed switchgear with one or more fuses mounted on a drawer interlocked with interrupter switch means and operating mechanism therefor
AU2005201311B2 (en) Gas-insulated switchgear device
EP3671990B1 (de) Dreiphasiges schaltgerät
KR0123024B1 (ko) 개폐장치
US20080042786A1 (en) Power Switch Comprising an Interrupter Unit Disposed within an Encapsulating Housing
US4109124A (en) Circuit-breakers for high voltages
EP0008513A1 (de) Schalteranordnung für ein dreiphasiges Elektrizitätsnetz
US4525612A (en) Gas insulated switch
EP0517295B1 (de) Schwefelhexafluoridisolierter Mittelspannungsschalter mit drei Positionen
EP3843117A1 (de) Lasttrennschalter ohne sf6-gas mit einem vakuumleistungsschalter für mittelspannungsschaltanlagen
EA030580B1 (ru) Коммутационный аппарат для электроэнергетических систем
KR100374239B1 (ko) 스위치 기어
US4183003A (en) Load-break fuse equipment
EP0196240B1 (de) Gasisoliertes gekapseltes Schaltgerät
CZ296238B6 (cs) Plynem hexafluoridu síry (SF6) izolovaná rozvodnapro rozdelovací síte
KR200196865Y1 (ko) 퓨즈내장형 계기용변압기의 개폐장치
JPH02210389A (ja) 中圧又は高圧メタルクラッドステーション用のセル及びこの種のセルで作られるステーション
CN218351373U (zh) 断路器
US4211903A (en) Electromagnetic puffer type gas circuit breaker
US3301986A (en) Electric current transfer structure including contact balls
US2772335A (en) Circuit breakers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19801219