CN104143465A - High-speed earthing switch and earthing switch assembly unit with the same - Google Patents
High-speed earthing switch and earthing switch assembly unit with the same Download PDFInfo
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- CN104143465A CN104143465A CN201310437611.8A CN201310437611A CN104143465A CN 104143465 A CN104143465 A CN 104143465A CN 201310437611 A CN201310437611 A CN 201310437611A CN 104143465 A CN104143465 A CN 104143465A
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a high-speed earthing switch and an earthing switch assembly unit with the high-speed earthing switch. The high-speed earthing switch comprises a sulfur hexafluoride arc-control device which is arranged in a sealed gas chamber of a shell of a corresponding assembly unit when used. The sulfur hexafluoride arc-control device comprises a static-end assembly device and a movable-end assembly device. The static-end assembly device comprises a static-end conductor and a static arcing contact electrically connected to the static-end conductor. The static-end conductor is provided with conductive rod connecting structures which are fixedly and electrically connected with the adjacent ends of two corresponding conductive rods respectively. The movable-end assembly device comprises a movable arcing contact, wherein a corresponding fault phase is earthed through closing between the movable arcing contact and the static arcing contact. The high-speed earthing switch further comprises a power output end and an operating mechanism which is in transmission connection with the movable arc contactor. The high-speed earthing switch is used for extinguishing a secondary arc current.
Description
Technical field
The present invention relates to high-speed grounding switch in transmission facility field and the earthed switch assembly unit of formation thereof.
Background technology
The fault of extra high voltage network more than 90% is single phase ground fault, and in single phase ground fault, approximately have 80% for " instantaneity " fault, mostly adopt single-pole reclosing to eliminate single phase ground fault at China 220kV and Above Transmission Lines, improve the stability of system and the reliability of power supply, the success or not of single-pole reclosing depends on that can the latent electric arc that supplies of fault point put out certainly.In transmission line when circuit generation single phase ground fault, system auto recloser moves immediately, and the circuit breaker at fault phase two ends disconnects immediately, and short circuit current is cut off, now perfect by electrostatic coupling and electromagnetic coupled and continue to provide electric current to fault point, i.e. secondary arc current.
Extra high voltage network adopts 8 divisions, even 12 divisions because wire, and phase spacing is larger, circuit is longer, therefore line-to-ground distributed capacitance and the electric capacity that distributes alternately are all very large, supply the arcing time longer from the latent of induced voltage generation that perfects phase, the success rate of single phase autoreclosing is reduced greatly, very serious to the harm of system, therefore, must take appropriate measures to shorten the fall time of diving for electric arc.At present, mainly contain and install high-speed grounding switch additional and shunt reactor neutral point connects two kinds of little reactance for the method for Secondary Arc Extinction.What China adopted while building ultra high voltage demonstration circuit is that shunt reactor neutral point connects little reactance; this method may form resonant tank due to alternate with the impedance of reactor with electric capacity relatively; need to take preventive measures and increase the complexity of system protection, investing is larger simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of for extinguishing the high-speed grounding switch of secondary arc current; The present invention also aims to provide a kind of earthed switch assembly unit that uses this earthed switch.
In order to address the above problem, the technical scheme of high speed earthed switch of the present invention is:
High-speed grounding switch, comprise the sulphur hexafluoride arc-control device of the sealed gas chamber of the housing for being placed in use corresponding assembly unit, sulphur hexafluoride arc-control device comprises quiet end assembling and moved end assembling, quiet end assembles the quiet end conductor comprising and is electrically connected in the static arc contact on quiet end conductor, on quiet end conductor, be provided with and be respectively used to the conducting rod syndeton that is fixedly electrically connected with the abutting end of corresponding two conducting rods, moved end assembling comprises by closing a floodgate the moving arcing contact of corresponding failure phase ground connection with described static arc contact, high-speed grounding switch also comprises the operating mechanism that clutch end and described moving arcing contact are in transmission connection.
Described quiet end conductor comprises the conductive sleeve that axis extends along the vertical direction, and described static arc contact is coaxially set in the endoporus lower end of described conductive sleeve by static arc contact fixed support.
Described conducting rod syndeton comprises that axis is vertically disposed with described static arc contact axis, the electric connecting sleeve of the corresponding conducting rod coaxial line conduction of confession plug-in mounting.
In the present invention, the technical scheme of earthed switch assembly unit is: earthed switch assembly unit, comprise housing and mechanism's casing, in housing, be provided with sealed gas chamber, on the air chamber wall of sealed gas chamber, be equipped with two center conductors for being connected with corresponding single-phase conduction in use by insulating supporting structure insulated enclosure, in sealed gas chamber, be provided with respectively with each center conductor and conduct electricity the conducting rod being connected, in described sealed gas chamber, be also provided with sulphur hexafluoride arc-control device, sulphur hexafluoride arc-control device comprises the quiet end assembling and the moved end assembling that are fixedly installed by quiet end bearing housing relative to moved end bearing respectively, quiet end assembling comprises the quiet end conductor being arranged on quiet end bearing and is electrically connected in the static arc contact on quiet end conductor, on quiet end conductor, be provided with respectively the conducting rod syndeton being fixedly electrically connected with the abutting end of two conducting rods, assemble while being included in described single-phase fault by closing a floodgate the moving arcing contact of described single-phase earthing with described static arc contact moved end, earthed switch assembly unit also comprises the operating mechanism that clutch end and described moving arcing contact are in transmission connection.
Described quiet end conductor comprises the conductive sleeve that axis extends along the vertical direction, described static arc contact is coaxially set in the endoporus lower end of described conductive sleeve by static arc contact fixed support, described moving arcing contact is positioned at described static arc contact downside, and operating mechanism is positioned at described moved end assembling downside.
Described housing comprises the vertical cylindrical shell that axis extends along the vertical direction and is arranged at two horizontal cylindrical shells of vertical cylindrical shell both sides, each conducting rod is coaxially set with corresponding horizontal cylindrical shell respectively, and described moving arcing contact, static arc contact and described vertical cylindrical shell are coaxially set.
The upper/lower terminal of described vertical cylindrical shell is respectively arranged with the upper and lower hermetically-sealed construction being sealed and matched with the barrel wall of vertical cylindrical shell, insulating supporting structure is arranged at respectively in each horizontal cylindrical shell, and described sealed gas chamber is surrounded by vertical, the horizontal cylindrical shell of described upper and lower hermetically-sealed construction, each insulating supporting structure and corresponding position.
Described quiet end bearing comprises insulating supporting sleeve, upper insulation supporting cylinder comprises and is coaxially set in the shell portion of quiet end conductor upper end and is fixedly arranged on the upper cover plate of shell portion upper end, on described upper cover plate, be provided with for the removable upper bolt fastening structure being fixedly connected with in described vertical cylindrical shell upper end.
Described moved end bearing comprises the lower insulating supporting sleeve being coaxially set with described moving arcing contact, the lower end of described lower insulating supporting sleeve be provided with for the removable lower bolt fastening structure being fixedly connected with in lower end of described vertical cylindrical shell, in described lower insulation supporting cylinder, be equipped with and realize the insulated tension pole that operating mechanism and moving arcing contact are in transmission connection.
Beneficial effect of the present invention is: when use, the center conductor in the present invention and corresponding single-phase conduction are connected and realize quiet end conductor with this and be connected with single-phase electricity, in the time of working line single phase ground fault fault, produce one time electric arc, the single-phase fault phase that is called breaking down, fault phase two ends circuit breaker trip, an arc extinction, charged electrostatic coupling and the electromagnetic coupled of communicating of two-phase continues to provide electric current to fault point in addition, secondary arc current produces, now operating mechanism drives moving, static arc contact closes a floodgate, fault phase is by static arc contact and moving arcing contact ground connection, dive for arc extinction, operating mechanism drives moving subsequently, static arc contact separating brake, the present invention utilizes moving in sulphur hexafluoride arc-control device, static arc contact ground connection, can ensure to move, smooth arc extinguishing when static arc contact separating brake, thereby ensure the reclosing success of follow-up circuit breaker.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of earthed switch assembly unit in the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the schematic diagram that coordinates of earthed switch and vertical cylindrical shell in Fig. 1;
Fig. 4 is the structural representation of quiet end assembling in Fig. 3;
Fig. 5 is the structural representation of moved end assembling in Fig. 3;
Fig. 6 is the structural representation of operating mechanism in Fig. 1;
Fig. 7 is the right view of Fig. 6.
Embodiment
The embodiment of earthed switch assembly unit is as shown in Fig. 1 ~ 7: comprise housing 40, housing comprises the vertical cylindrical shell 42 that axis extends along the vertical direction and the horizontal cylindrical shell 43 that is placed in the vertical cylindrical shell left and right sides, the opposite end of two horizontal cylindrical shells is provided with the flange connection 47 for being fixedly connected with other cylindrical shell of GIS equipment, in the time of transport, on each flange connection, all mount cover packaging cover plate 4.The lower end of vertical cylindrical shell is provided with mechanism's casing 7.In each horizontal cylindrical shell, all sealing is equipped with insulating supporting structure, the center position of each insulating supporting structure is provided with the center conductor being connected with corresponding single-phase electricity in use, insulating supporting structure is made up of disc insulator 2, on each center conductor, be all electrically connected with conducting rod 44, each disc insulator is sealedly and fixedly connected with the barrel wall of corresponding horizontal cylindrical shell respectively.Vertically cylindrical shell is upper, lower two ends are respectively arranged with hermetically-sealed construction and lower seal structure, wherein going up hermetically-sealed construction is made up of the maintenance lid 45 mounting cover in vertical cylindrical shell upper port, lower seal structure comprises the lower supporting plate 46 being connected with mechanism casing, vertical cylindrical shell and lower supporting plate seal by sealing ring, on, lower seal structure, each disc insulator and corresponding position laterally, vertical cylindrical shell surrounds sealed gas chamber, conducting rod is arranged in this sealed gas chamber, on the corresponding housing wall of sealed gas chamber, be provided with adsorbent 10, in this closed air chamber, be filled with sulfur hexafluoride gas, make this closed air chamber form large arc control device, in this sealed gas chamber, be provided with sulphur hexafluoride arc-control device, and realize with this arc-suppression function that sulphur hexafluoride arc-control device is good.The horizontal cylindrical shell of corresponding position refers to the horizontal cylindrical shell between two disc insulators, and the vertical cylindrical shell of corresponding position refers to the vertical cylindrical shell between upper and lower hermetically-sealed construction.Sulphur hexafluoride arc-control device is arranged in the vertical cylindrical shell of this sealed gas chamber, sulphur hexafluoride arc-control device comprises quiet end assembling 1 and the moved end assembling 6 by the fixing assembling of quiet end bearing housing relative to moved end bearing respectively, quiet end assembling comprises the quiet end conductor 16 being arranged on quiet end bearing and is electrically connected in the static arc contact 21 on quiet end conductor, quiet end conductor comprises the conductive sleeve being coaxially set with vertical cylindrical shell, static arc contact is coaxially set in the endoporus lower end of conductive sleeve by static arc contact fixed support 18, the two ends, left and right of conductive sleeve are respectively arranged with the conducting rod syndeton for being fixedly electrically connected with the abutting end of two conducting rods, conducting rod syndeton comprises the electric connecting sleeve for corresponding conducting rod coaxial line conduction plug-in mounting, two electric connecting sleeves are coaxially set, electric connecting sleeve is secured by bolts on conductive sleeve, the two ends up and down of conductive sleeve are respectively arranged with radome 15 and lower radome 19.Quiet end bearing comprises insulation supporting cylinder, upper insulation supporting cylinder comprises the shell portion 14 being coaxially set with vertical cylindrical shell and the upper cover plate 20 that is fixedly arranged on shell portion upper end, the upper end nozzle of vertical cylindrical shell is along the installation step that is above provided with a ring shape, installation step has installation base surface upward, upper cover plate is installed on this installation base surface by upper bolt fastening structure, maintenance lid is positioned at the top of upper cover plate, and quiet end conductor is fixedly arranged on shell portion lower end.Assemble while being included in single-phase fault by closing a floodgate the moving arcing contact of described single-phase earthing 28 with static arc contact moved end, moving arcing contact is positioned at static arc contact downside, in mechanism's casing, be provided with the operating mechanism 8 that clutch end is in transmission connection by insulated tension pole 27 and moving arcing contact, sulphur hexafluoride arc-control device also comprises that coaxial line is sheathed on the pneumatic cylinder 22 of moving arcing contact periphery, moving arcing contact is connected with pneumatic cylinder conduction, the upper end of pneumatic cylinder is installed with spout 29, pneumatic cylinder fairlead is loaded on piston cylinder 24, pneumatic cylinder and insulated tension pole are in transmission connection, that is to say insulated tension pole, pneumatic cylinder, spout and moving arcing contact synchronization action, moved end assembling also comprises moved end support, moved end is provided with pneumatic cylinder and conducts electricity the fingertip 23 being connected on supporting, fingertip is supported with earth terminal assembling 9 and is electrically connected by moved end, thereby realizing moving arcing contact is electrically connected with earth terminal assembling, the lower end that moved end is supported is installed with moved end support tube 25, the lower end of piston cylinder is provided with damper piston 26, the operation principle of sulphur hexafluoride arc-control device is: moving, when static arc contact closes a floodgate, by moving, static arc contact is realized single-phase earthing, moving, when static arc contact separating brake, insulated tension pole drives moving arcing contact, spout, pneumatic cylinder moves down, sulfur hexafluoride gas in pneumatic cylinder is compressed and pressure raises, in the time that spout is opened, the gas of high pressure will be discharged by nozzle, realize arc blowing function.Be provided with the upper backup pad 50 being fixedly connected with lower insulation supporting cylinder in the lower end of moved end support tube, insulated tension pole is passed by the through hole of offering on upper backup pad, through hole sealing on insulated tension pole and upper backup pad is slidably matched, in mechanism case, be provided with the operating mechanism 8 being in transmission connection by insulated tension pole and moving arcing contact, operating mechanism is a hydraulic actuating mechanism, operating mechanism comprises power transmission shaft 32, on power transmission shaft, be installed with crankshaft-link rod 31, the connecting rod of crankshaft-link rod and the lower end of insulated tension pole are hinged and connected, the clutch end of hydraulic drive mechanism is connected with transmission shaft driven, in the time that reality is used, hydraulic drive mechanism drives power transmission shaft to rotate, thereby make crankshaft-link rod drive insulated tension pole to move up and down, moving to realize, the on/off switch of static arc contact.Item 30 represents crankcases; Item 3 represents to realize conducting rod and the corresponding single-phase electrical connector being electrically connected, and electrical connector is a sleeve-like structure; Item 17 represents the electrical connection supporting seats of installing for electric connecting sleeve.
When use, the cylindrical shell of this earthed switch assembly unit and GIS miscellaneous equipment is coupled together, and conducting rod is connected with corresponding single-phase conduction, in the time of working line single phase ground fault fault, produce one time electric arc, fault phase two ends circuit breaker trip, an arc extinction, charged communicated electrostatic coupling and electromagnetic coupled of two-phase continues to provide electric current to fault point in addition, now secondary arc current produces, be installed in earthed switch moving of fault phase, static arc contact closes a floodgate, realize single-phase earthing, dive for arc extinction, moving of consequent earth connection switch, static arc contact separating brake, last circuit breaker reclosing success, circuit recovers normal charging operation.
Quiet end assembling and moved end assembling are arranged in the vertical cylindrical shell of vertical setting, the floor space that is conducive to save assembly unit; Quiet end assembling is fixed by upper insulation supporting cylinder and housing, and upper insulation supporting cylinder plays insulation and supporting role, the quiet end Parts optimization of upper and lower radome maskable electric field structure; Moved end assembling is fixed by lower insulation supporting cylinder and housing, and lower insulation supporting cylinder plays insulation and supporting role.
In other embodiments of the invention: upper insulation supporting cylinder can also be arranged at quiet end assembling below, the upper end of now going up insulation supporting cylinder is fixedly connected with quiet end conductor, the lower end of upper insulation supporting cylinder is fixedly connected with lower supporting plate, and moved end assembling is arranged in the endoporus of insulation supporting cylinder; The all right transverse arrangement of turbo of dynamic and static arcing contact; Conducting rod syndeton can be also the screwed hole being arranged on conductive sleeve, when use, directly conducting rod is fixed on conductive sleeve by bolt; Certainly upper insulation supporting cylinder also can not established, and now quiet end bearing can be made up of conducting rod, and conducting rod had both played a part, to quiet end conductor conduction, to play a part again to support quiet end assembling; Operating mechanism can be also spring operating mechanism or pneumatic, electromagnetic operating mechanism etc.; Sulphur hexafluoride arc-control device in the present invention is air pressing type arc extinguishing, and sulphur hexafluoride arc-control device can also adopt self-energy air-blowing arc-control device certainly; Disc insulator can also be insulated supporting bracket or other insulating supporting structure replaces; Upper insulation supporting cylinder also can only comprise shell portion, now can directly access hole be fixed on in shell portion upper end and cover; Certainly maintenance lid also can not be arranged at insulation supporting cylinder directly over, such as be arranged at the side of vertical cylindrical shell; Two conducting rods can also vertically arrange, in the time that horizontal cylindrical shell is longer, and all right suitable increase of the number of the conducting rod of the vertical every side of cylindrical shell; Installation step also can not established, and now upper cover plate can be secured by bolts on the inwall of maintenance lid or vertical cylindrical shell.
The embodiment of high-speed grounding switch is as shown in Fig. 1 ~ 7: high-speed grounding switch comprises sulphur hexafluoride arc-control device and operating mechanism, the concrete structure of sulphur hexafluoride arc-control device and operating mechanism is identical with sulphur hexafluoride arc-control device and operating mechanism described in above-mentioned each earthed switch assembly unit embodiment, is not described in detail in this.
Claims (9)
1. high-speed grounding switch, it is characterized in that: the sulphur hexafluoride arc-control device that comprises the sealed gas chamber of the housing for being placed in use corresponding assembly unit, sulphur hexafluoride arc-control device comprises quiet end assembling and moved end assembling, quiet end assembles the quiet end conductor comprising and is electrically connected in the static arc contact on quiet end conductor, on quiet end conductor, be provided with and be respectively used to the conducting rod syndeton that is fixedly electrically connected with the abutting end of corresponding two conducting rods, moved end assembling comprises by closing a floodgate the moving arcing contact of corresponding failure phase ground connection with described static arc contact, high-speed grounding switch also comprises the operating mechanism that clutch end and described moving arcing contact are in transmission connection.
2. high-speed grounding switch according to claim 1, is characterized in that: described quiet end conductor comprises the conductive sleeve that axis extends along the vertical direction, and described static arc contact is coaxially set in the endoporus lower end of described conductive sleeve by static arc contact fixed support.
3. high-speed grounding switch according to claim 1 and 2, is characterized in that: described conducting rod syndeton comprises that axis is vertically disposed with described static arc contact axis, the electric connecting sleeve of the corresponding conducting rod coaxial line conduction of confession plug-in mounting.
4. earthed switch assembly unit, it is characterized in that: comprise housing, in housing, be provided with sealed gas chamber, on the air chamber wall of sealed gas chamber, be equipped with two center conductors for being connected with corresponding single-phase conduction in use by insulating supporting structure insulated enclosure, in sealed gas chamber, be provided with respectively with each center conductor and conduct electricity the conducting rod being connected, in described sealed gas chamber, be also provided with sulphur hexafluoride arc-control device, sulphur hexafluoride arc-control device comprises the quiet end assembling and the moved end assembling that are fixedly installed by quiet end bearing housing relative to moved end bearing respectively, quiet end assembling comprises the quiet end conductor being arranged on quiet end bearing and is electrically connected in the static arc contact on quiet end conductor, on quiet end conductor, be provided with respectively the conducting rod syndeton being fixedly electrically connected with the abutting end of two conducting rods, assemble while being included in described single-phase fault by closing a floodgate the moving arcing contact of described single-phase earthing with described static arc contact moved end, earthed switch assembly unit also comprises the operating mechanism that clutch end and described moving arcing contact are in transmission connection.
5. earthed switch assembly unit according to claim 4, it is characterized in that: described quiet end conductor comprises the conductive sleeve that axis extends along the vertical direction, described static arc contact is coaxially set in the endoporus lower end of described conductive sleeve by static arc contact fixed support, described moving arcing contact is positioned at described static arc contact downside, and operating mechanism is positioned at described moved end assembling downside.
6. earthed switch assembly unit according to claim 5, it is characterized in that: described housing comprises the vertical cylindrical shell that axis extends along the vertical direction and is arranged at two horizontal cylindrical shells of vertical cylindrical shell both sides, each conducting rod is coaxially set with corresponding horizontal cylindrical shell respectively, and described moving arcing contact, static arc contact and described vertical cylindrical shell are coaxially set.
7. earthed switch assembly unit according to claim 5, it is characterized in that: the upper/lower terminal of described vertical cylindrical shell is respectively arranged with the upper and lower hermetically-sealed construction being sealed and matched with the barrel wall of vertical cylindrical shell, insulating supporting structure is arranged at respectively in each horizontal cylindrical shell, and described sealed gas chamber is surrounded by vertical, the horizontal cylindrical shell of described upper and lower hermetically-sealed construction, each insulating supporting structure and corresponding position.
8. earthed switch assembly unit according to claim 5, it is characterized in that: described quiet end bearing comprises insulating supporting sleeve, upper insulation supporting cylinder comprises and is coaxially set in the shell portion of quiet end conductor upper end and is fixedly arranged on the upper cover plate of shell portion upper end, on described upper cover plate, be provided with for the removable upper bolt fastening structure being fixedly connected with in described vertical cylindrical shell upper end.
9. earthed switch assembly unit according to claim 5, it is characterized in that: described moved end bearing comprises the lower insulating supporting sleeve being coaxially set with described moving arcing contact, the lower end of described lower insulating supporting sleeve be provided with for the removable lower bolt fastening structure being fixedly connected with in lower end of described vertical cylindrical shell, in described lower insulation supporting cylinder, be equipped with and realize the insulated tension pole that operating mechanism and moving arcing contact are in transmission connection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310437611.8A CN104143465B (en) | 2013-09-24 | 2013-09-24 | The earthed switch assembly unit of high-speed grounding switch and its composition |
| PCT/CN2014/087223 WO2015043460A1 (en) | 2013-09-24 | 2014-09-23 | High-speed grounding switch and grounding switch assembly unit composed thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310437611.8A CN104143465B (en) | 2013-09-24 | 2013-09-24 | The earthed switch assembly unit of high-speed grounding switch and its composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104143465A true CN104143465A (en) | 2014-11-12 |
| CN104143465B CN104143465B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310437611.8A Active CN104143465B (en) | 2013-09-24 | 2013-09-24 | The earthed switch assembly unit of high-speed grounding switch and its composition |
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| Country | Link |
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| CN (1) | CN104143465B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106611678A (en) * | 2015-10-26 | 2017-05-03 | 上海思源高压开关有限公司 | Directly-connected transmission mode |
| CN112771740A (en) * | 2018-10-30 | 2021-05-07 | Ls电气株式会社 | Quick grounding switch of gas insulated switchgear |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61237316A (en) * | 1985-04-13 | 1986-10-22 | 株式会社東芝 | Gas insulated ground switch |
| CN1030326A (en) * | 1987-07-02 | 1989-01-11 | 三菱电机株式会社 | Tank-truck circuit-breaker |
| CN2924763Y (en) * | 2006-07-20 | 2007-07-18 | 丹东供电设备厂 | Sulfur hexafluoride circuit breaker arc-quenching mechanism |
| CN201038042Y (en) * | 2007-04-25 | 2008-03-19 | 上海泰高开关有限公司 | Earth switch |
-
2013
- 2013-09-24 CN CN201310437611.8A patent/CN104143465B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61237316A (en) * | 1985-04-13 | 1986-10-22 | 株式会社東芝 | Gas insulated ground switch |
| CN1030326A (en) * | 1987-07-02 | 1989-01-11 | 三菱电机株式会社 | Tank-truck circuit-breaker |
| CN2924763Y (en) * | 2006-07-20 | 2007-07-18 | 丹东供电设备厂 | Sulfur hexafluoride circuit breaker arc-quenching mechanism |
| CN201038042Y (en) * | 2007-04-25 | 2008-03-19 | 上海泰高开关有限公司 | Earth switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106611678A (en) * | 2015-10-26 | 2017-05-03 | 上海思源高压开关有限公司 | Directly-connected transmission mode |
| CN112771740A (en) * | 2018-10-30 | 2021-05-07 | Ls电气株式会社 | Quick grounding switch of gas insulated switchgear |
| CN112771740B (en) * | 2018-10-30 | 2023-04-28 | Ls电气株式会社 | Fast grounding switch of gas-insulated switchgear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104143465B (en) | 2017-03-15 |
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