CN106571262A - Isolation switch and contact assembly thereof - Google Patents
Isolation switch and contact assembly thereof Download PDFInfo
- Publication number
- CN106571262A CN106571262A CN201610954304.0A CN201610954304A CN106571262A CN 106571262 A CN106571262 A CN 106571262A CN 201610954304 A CN201610954304 A CN 201610954304A CN 106571262 A CN106571262 A CN 106571262A
- Authority
- CN
- China
- Prior art keywords
- contact
- insulating supporting
- arcing contact
- arcing
- conductive seat
- 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.)
- Granted
Links
- 238000002955 isolation Methods 0.000 title abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 28
- 239000010949 copper Substances 0.000 claims description 28
- 229910052802 copper Inorganic materials 0.000 claims description 28
- 230000003068 static effect Effects 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 16
- 238000010891 electric arc Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 1
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- H01H33/04—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
-
- 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
Abstract
The invention relates to an isolation switch and a contact assembly thereof; the contact assembly comprises a main contact and an arc contact, wherein the main contact is provided with an insulation support; the arc contact is arranged on the insulation support; the arc contact is electrically connected with the main contact through a petersen coil winding on the periphery of the insulation support, thus ensuring electric current to pass the arc contact, the coil and the main contact in order, ensuring the magnetic field intensity in the coil, further improving arc extinguishing effect, and minimizing the arc contact diversion effect; in addition, the end portion of the petersen coil can be only provided with the arc contact of a small structure, thus saving cost.
Description
Technical field
The present invention relates to high-voltage switch gear field, more particularly to a kind of disconnecting switch and its contact assembly.
Background technology
In double-bus GIS, usually single female operation is poor due to existing between two buses when needing to change bus run
It is different, cause disconnecting switch to need to have the switching current and conversion voltage of opening-closing bus, especially in super extra-high voltage, double-bus
Longer, through-current capability is larger, differs greatly between two buses, and this causes the bus switching current at disconnecting switch beginning to be up to
1600A, voltage is up to 400V, and this proposes the requirement of harshness to disconnecting switch, needs disconnecting switch to possess very strong arc extinguishing
Ability, traditional mode is changed so as to improve disconnecting switch mainly using the divide-shut brake speed for improving disconnecting switch to bus
The connecting-disconnecting function of electric current, but this requires that mechanism's operation output work of disconnecting switch is very big, and isolating switch mechanism can be caused to claim root
This is higher, the vibrations of disconnecting switch moving process are larger, and reliability is low.
A kind of high_voltage isolation is disclosed in the notification number for authorizing is for the Chinese invention patent file of CN105428138A to open
Close, it includes moving arcing contact, static arc contact, both are on arcing contact, and moving arcing contact and are arranged with for producing in separating brake
The Petersen coil in magnetic field, wherein moving arcing contact are bolted to connection in dynamic main contac, and dynamic main contac is equal with quiet main contact
For main contact, during disconnecting switch cut-offs bus switching current, electric arc is produced between moving arcing contact and static arc contact, electricity
Arc current is entered in Petersen coil and forms magnetic field, and electric arc starts under the influence of a magnetic field rotary motion and is elongated, in the work of SF6
Can rapidly be cooled with, last electric arc extinguishes safely in current zero-crossing point, thus reach the purpose of magnetic quenching.But
Using the disconnecting switch when bus switching current is cut-off, because Petersen coil is set on moving arcing contact and moving arcing contact is fixed
In dynamic main contac, equivalent to moving arcing contact and coils from parallel connection of coils to dynamic main contac, this electric connection mode is produced simultaneously in electric arc
When forming high current, electric current will certainly be shunted during flowing through coil is to form magnetic field by moving arcing contact so that arc extinguishing line
The arc quenching effect of circle is not reaching to preferable effect, in addition, the manufacturing cost of moving arcing contact is higher, all adopts in dynamic main contac
With moving arcing contact so that the cost of the disconnecting switch increases.
The content of the invention
It is an object of the invention to provide a kind of disconnecting switch, to solve the moving arcing contact of disconnecting switch of the prior art
When causing electric arc to produce with coils from parallel connection of coils, the problem of moving arcing contact shunting；The present invention also aims to provide a kind of isolation
The contact assembly of switch.
For achieving the above object, the technical scheme of contact assembly of the present invention is：
Contact assembly, including main contact, arcing contact, are provided with insulating supporting on main contact, the arcing contact is arranged on insulation
In support, the arcing contact with main contact around the Petersen coil for being located at insulating supporting periphery by being conductively connected.
Insulating supporting is fixed on main contact by conductive seat, and the arcing contact and conductive seat are respectively with the two of insulating supporting
End connection, has the middle part winding section for Petersen coil winding on insulating supporting, on the arcing contact and conductive seat confession is respectively provided with
The end winding section of Petersen coil winding, the middle part winding section is consistent with the external diameter of end winding section.
Petersen coil is formed using copper strips, and the end of copper strips is separately fixed at arcing contact and conductive seat by screw
On.
Insulating supporting is tubular structure, and its two ends is provided with external screw thread, the conductive seat and arcing contact by screw thread with
Insulating supporting connects.
The one end being connected with arcing contact on insulating supporting is provided with the escape groove for avoiding arcing contact, and insulating supporting
Smallest radial size of the internal diameter size more than corresponding arcing contact inner peripheral surface.
The technical scheme of disconnecting switch of the present invention is：
Disconnecting switch, including moving contact component and static contact component, two contact assemblies include main contact and arcing contact, wherein
Insulating supporting is provided with the main contact of at least one contact assembly, arcing contact is arranged on insulating supporting, the arcing contact leads to
Cross and be conductively connected with main contact around the Petersen coil for being located at insulating supporting periphery.
Insulating supporting is fixed on main contact by conductive seat, and the arcing contact and conductive seat are respectively with the two of insulating supporting
End connection, has the middle part winding section for Petersen coil winding on insulating supporting, on the arcing contact and conductive seat confession is respectively provided with
The end winding section of Petersen coil winding, the middle part winding section is consistent with the external diameter of end winding section.
Petersen coil is formed using copper strips, and the end of copper strips is separately fixed at arcing contact and conductive seat by screw
On.
Insulating supporting is tubular structure, and its two ends is provided with external screw thread, the conductive seat and arcing contact by screw thread with
Insulating supporting connects.
The one end being connected with arcing contact on insulating supporting is provided with the escape groove for avoiding arcing contact, and insulating supporting
Smallest radial size of the internal diameter size more than corresponding arcing contact inner peripheral surface.
The invention has the beneficial effects as follows：
Compared to prior art, contact assembly involved in the present invention is propped up by arranging insulating supporting on main contact in insulation
Winding Petersen coil in support, arcing contact is realized being conductively connected with main contact by Petersen coil, thus can ensure that electric current can
Arcing contact, coil, main contact are flowed through successively, it is ensured that the magnetic field intensity in coil, further improve arc quenching effect, and by arcing contact
Minimum is down in the impact of shunting, further, it is only necessary to arrange the arcing contact of smaller structure, cost in the end of Petersen coil
It is low.
Further, insulating supporting is fixed on main contact by conductive seat, by the installation of transition conductive seat, it is ensured that
The compactedness of structure, and the fixed form of coil is selectively more, winding section in middle part is consistent with the external diameter of end winding section, it is ensured that
The stability in the magnetic field of Petersen coil, and ensure effective electrical conduction.
Further, Petersen coil adopts copper strips, two ends to be fixed on conductive seat and arcing contact using screw, effectively protects
Effective electrical contact of the coil respectively between arcing contact and conductive seat is demonstrate,proved.
Further, the escape groove for avoiding arcing contact is provided with insulating supporting, it is ensured that arcing contact is on insulating supporting
Installing space, and the minimum inner peripheral surface of arcing contact is smaller in size than the internal diameter of insulating supporting, it is ensured that the electrical contact of arcing contact it
Afterwards to the avoidance of corresponding arcing contact.
Description of the drawings
Fig. 1 is the structural representation of contact assembly specific embodiment of the present invention；
Fig. 2 is the assembling structure schematic diagram of Fig. 1 moving contact components and static contact component；
Fig. 3 is assembling structure schematic diagram of Fig. 1 contact assemblies in disconnecting switch；
Fig. 4 is the C-C direction views of Fig. 3.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment of the contact assembly of the present invention, as shown in Figure 1 to Figure 2, the contact assembly is in disconnecting switch
Moving contact component, it include axis or so extend dynamic main contac 1, its adopt material for 6063 aluminium machine-shaping, outer surface
It is silver-plated reducing contact resistance coefficient, it is ensured that effective electrical contact of dynamic main contac 1 and main conductive circuit, along axle in dynamic main contac 1
Line is extended through hole, and right-hand member is provided with inward flange in the through hole, upper on the inward flange to be connected with by screw 2
Copper touch base 3（That is conductive seat）, the copper touch base 3 is tubular structure, and one end carries outward flange, and copper touch base 3 and dynamic main contac 1 pass through
The screw 2 screwed on outward flange and inward flange is solid-located, and is provided with screw thread on the hole inwall of the copper touch base 3, the contact
Also include insulation supporting cylinder 6 be insulating supporting, the insulation supporting cylinder 6 including the thread segment and connection screw thread section for being arranged at two ends
Middle part winding section, more than the external diameter of thread segment, middle part winding section Shangrao is provided with coil 5 i.e. arc extinguishing line for the external diameter of middle part winding section
Circle, coil 5 along insulation supporting cylinder 6 axis direction it is two-way extend to thread segment top, and be arranged on the outer peripheral face of copper touch base 3 lead to
Cross screw 4 to be fixedly connected, the external diameter that overhang winding section is arranged with copper touch base is consistent with the external diameter of middle part winding section；Copper
Touch base 3 is consistent with the axis of insulation supporting cylinder 6 as transition base, its axis is installed, and is bolted in the left end spiral shell of insulation supporting cylinder 6
In line section, meanwhile, copper touch base 3 also serves as the connector of coil 5 and the electrical circuit of dynamic main contac 1.The right-hand member of coil 5 is fixedly connected
There is moving arcing contact 7, moving arcing contact adopts resistance to ablation, and the high copper-tungsten material of hardness is machining, is mainly used for isolating out
Striking when closing opening-closing bus switching current, and avoid ablation of the electric arc to dynamic main contac 1；Between dynamic arc arcing contact and main contact 1
It is contactless, electric current conduction is completed by the copper touch base 3 of coil 5 and connection coil 5, moving arcing contact 7 is bolted in insulation supporting cylinder 6
Right-hand member thread segment, the two ends of coil 5 are secured by bolts in respectively on copper touch base 3 and moving arcing contact 7, ensure that coil
5 with copper touch base 3, effective electrical contact of moving arcing contact 7.The escape groove for avoiding moving arcing contact, and dynamic arc are provided with insulating supporting
Internal diameter of the minimum inner peripheral surface diameter of contact less than insulation supporting cylinder.Coil 5 using copper material copper strips, can the short time it is resistance to
By a range of high current, copper strips presses right-hand screw mode uniform winding in copper touch base 3, insulation supporting cylinder 6, moving arcing contact 7
On, using insulation heat-shrinkable tube outside copper strips, to ensure the turn-to-turn insulation of copper coil 5, and the two ends end naked heat of copper strips is received
The draw, it is ensured that coil 5 and copper touch base 3, effective electrical contact of moving arcing contact 7.Insulation supporting cylinder 6 adopts Vaccum Permeating sebific duct, has
Certain dielectric strength, higher mechanical strength, it is arranged between moving arcing contact 7 and copper touch base 3 and ensure that the electricity of the two
Draw last breath and scribble epoxyn on edge, and the thread segment of insulation supporting cylinder 6, it is to avoid occur the feelings for loosening after prolonged exercise
Condition, the part outside thread segment is covered using layer of polyurethane, protects Vaccum Permeating sebific duct not receive corroding for the electric arc product of SF6.
During the moving contact is applied to the switching of disconnecting switch, as shown in Figure 2 is arranged on moving contact component 12
The static contact component 13 of right-hand member, static contact component has the contact base 10 electrically connected with dynamic main contac 1, arranges on contact base 10
There is leaf spring fingertip 9, when disconnecting switch is closed a floodgate, for the electrical connection of disconnecting switch dynamic main contac 1 and contact base 10, static contact is also
Including the radome 8 being arranged on contact base 10, the inner member on static contact can be shielded, it is ensured that possess inside disconnecting switch
Relatively low field intensity value, in contact base 10 static arc contact 11 is extended with to the left, and with moving arcing contact 7 starting the arc is coordinated.
In the beginning bus switching current of disconnecting switch, disconnecting switch dynamic main contac 1 is quickly moved to the left, makes main touching
1 disconnects with leaf spring fingertip 9, but now the moving arcing contact 7 and static arc contact 11 of disconnecting switch also keeps contact, disconnecting switch after
Continuous when wanting to move left, moving arcing contact 7 disconnects with static arc contact 11, now because dynamic main contac 1 is long-range with the distance of leaf spring fingertip 9
Only produce between moving arcing contact 7 and static arc contact 11 in the distance between moving arcing contact 7 and static arc contact 11, therefore electric arc,
Arc current Jing moving arcing contacts 7 flow into coil 5 so that coil 5 it is electric after produce larger axial magnetic field, by electric arc in magnetic field
The lower rapid rotation of effect is elongated, and coordinates SF6 quickly to cool down, then dynamic main contac 1 is moved to the left after a certain distance, and electric arc is touched
Head flows through and quickly extinguish after zero point, reaches on the premise of disconnecting switch moving contact opening velocity is not increased, and coil 5 can be complete
Arc current is obtained so that the arc extinction performance of itself is maintained at higher level.
The structural representation of combination isolation earthing switch as shown in Figures 3 and 4, including disconnecting switch transmission case 14,
The moving contact component 12 of disconnecting switch is driven to carry out the divide-shut brake of disconnecting switch by insulated tension pole 19, guide support seat 15 passes through
Leaf spring fingertip is electrically connected with disconnecting switch moving contact component 12, and conducting rod 16 is arranged on guide support seat 15 by bolt
On, conducting rod 16 is connected by spring touch finger with electrically connecting 17, is electrically connected 17 and is arranged on disc insulator 18, disc insulator
18 another side is connected with main conductive circuit.
In other embodiments, the contact assembly can be static contact component, also can be in static contact component and moving contact group
Adopt simultaneously on part.
In other embodiments, conductive seat can be not provided with, by being directly fixedly connected between main contact and coil.
In other embodiments, other types of attachment such as bonding, riveting can be passed through to fix coil.
In other embodiments, insulating supporting can be not arranged in escape groove, and directly arcing contact is set to for insulation
The cannelure that supporting base end portion is stretched into can also ensure installing space.
In other embodiments, Petersen coil can be replaced with common copper cash or other kinds of coil, it is ensured that it can be steady
Admittedly it is fixed on arcing contact and conductive seat.
Disconnecting switch involved in the present invention, it includes moving contact component and static contact component, wherein at least one contact
The specific embodiment of component is consistent with the specific embodiment of above-mentioned contact assembly, is no longer developed in details in.
Claims (10)
1. contact assembly, including main contact, arcing contact, it is characterised in that：Insulating supporting, the arc are provided with the main contact
Contact is arranged on insulating supporting, and the arcing contact is by conductive with main contact even around the Petersen coil for being located at insulating supporting periphery
Connect.
2. contact assembly according to claim 1, it is characterised in that：The insulating supporting is fixed on main touching by conductive seat
On head, the arcing contact is connected respectively with conductive seat with the two ends of insulating supporting, has on insulating supporting and supplies Petersen coil winding
Middle part winding section, be respectively provided with the end winding section for Petersen coil winding on the arcing contact and conductive seat, the middle part around
If section is consistent with the external diameter of end winding section.
3. contact assembly according to claim 2, it is characterised in that：The Petersen coil is formed using copper strips, copper
The end of band is separately fixed on arcing contact and conductive seat by screw.
4. contact assembly according to claim 2, it is characterised in that：The insulating supporting is tubular structure, and its two ends is equal
External screw thread is provided with, the conductive seat and arcing contact are connected by screw thread with insulating supporting.
5. contact assembly according to claim 4, it is characterised in that：The one end being connected with arcing contact on the insulating supporting
The escape groove for avoiding arcing contact, and the internal diameter size of insulating supporting are provided with more than the minimum of corresponding arcing contact inner peripheral surface
Radial dimension.
6. a kind of disconnecting switch, including moving contact component and static contact component, two contact assemblies include that main contact and arc are touched
Head, it is characterised in that：Insulating supporting is provided with the main contact of wherein at least one contact assembly, arcing contact is arranged on insulation
In support, the arcing contact with main contact around the Petersen coil for being located at insulating supporting periphery by being conductively connected.
7. disconnecting switch according to claim 6, it is characterised in that：The insulating supporting is fixed on main touching by conductive seat
On head, the arcing contact is connected respectively with conductive seat with the two ends of insulating supporting, has on insulating supporting and supplies Petersen coil winding
Middle part winding section, be respectively provided with the end winding section for Petersen coil winding on the arcing contact and conductive seat, the middle part around
If section is consistent with the external diameter of end winding section.
8. disconnecting switch according to claim 7, it is characterised in that：The Petersen coil is formed using copper strips, copper
The end of band is separately fixed on arcing contact and conductive seat by screw.
9. disconnecting switch according to claim 7, it is characterised in that：The insulating supporting is tubular structure, and its two ends is equal
External screw thread is provided with, the conductive seat and arcing contact are connected by screw thread with insulating supporting.
10. disconnecting switch according to claim 9, it is characterised in that：One be connected with arcing contact on the insulating supporting
End is provided with the escape groove for avoiding arcing contact, and the internal diameter size of insulating supporting is more than corresponding arcing contact inner peripheral surface most
Little radial dimension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954304.0A CN106571262B (en) | 2016-10-27 | 2016-10-27 | A kind of disconnecting switch and its contact assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954304.0A CN106571262B (en) | 2016-10-27 | 2016-10-27 | A kind of disconnecting switch and its contact assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106571262A true CN106571262A (en) | 2017-04-19 |
| CN106571262B CN106571262B (en) | 2019-03-12 |
Family
ID=58535661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610954304.0A Expired - Fee Related CN106571262B (en) | 2016-10-27 | 2016-10-27 | A kind of disconnecting switch and its contact assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106571262B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111261448A (en) * | 2020-01-07 | 2020-06-09 | 平高集团有限公司 | Circuit breaker |
| CN112701005A (en) * | 2020-12-07 | 2021-04-23 | 河南平高电气股份有限公司 | Combined electric connection and isolation grounding switch using same |
| CN112701004A (en) * | 2020-12-07 | 2021-04-23 | 河南平高电气股份有限公司 | Isolation grounding switch arc contact base and isolation grounding switch |
| CN114498212A (en) * | 2022-01-26 | 2022-05-13 | 南京超捷智能科技有限公司 | Connector for arc extinguishing during high-voltage live-line plugging |
| CN114743824A (en) * | 2021-12-22 | 2022-07-12 | 平高集团有限公司 | Double-break isolating switch and GIS equipment |
| CN114743824B (en) * | 2021-12-22 | 2024-05-17 | 平高集团有限公司 | Double-break isolating switch and GIS equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19613568A1 (en) * | 1996-04-04 | 1997-10-09 | Asea Brown Boveri | Circuit breaker |
| CN2805259Y (en) * | 2005-06-16 | 2006-08-09 | 华中科技大学 | Digital TV integrated set having ADSL interface |
| CN101587787A (en) * | 2009-06-24 | 2009-11-25 | 河南平高电气股份有限公司 | Isolating switch |
| US8575509B2 (en) * | 2011-09-27 | 2013-11-05 | Eaton Corporation | Vacuum switching apparatus including first and second movable contact assemblies, and vacuum electrical switching apparatus including the same |
| CN105428138A (en) * | 2015-11-20 | 2016-03-23 | 河南平芝高压开关有限公司 | High-voltage isolation switch |
-
2016
- 2016-10-27 CN CN201610954304.0A patent/CN106571262B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111261448A (en) * | 2020-01-07 | 2020-06-09 | 平高集团有限公司 | Circuit breaker |
| CN111261448B (en) * | 2020-01-07 | 2022-07-05 | 平高集团有限公司 | Circuit breaker |
| CN112701005A (en) * | 2020-12-07 | 2021-04-23 | 河南平高电气股份有限公司 | Combined electric connection and isolation grounding switch using same |
| CN112701004A (en) * | 2020-12-07 | 2021-04-23 | 河南平高电气股份有限公司 | Isolation grounding switch arc contact base and isolation grounding switch |
| CN114743824A (en) * | 2021-12-22 | 2022-07-12 | 平高集团有限公司 | Double-break isolating switch and GIS equipment |
| CN114743824B (en) * | 2021-12-22 | 2024-05-17 | 平高集团有限公司 | Double-break isolating switch and GIS equipment |
| CN114498212A (en) * | 2022-01-26 | 2022-05-13 | 南京超捷智能科技有限公司 | Connector for arc extinguishing during high-voltage live-line plugging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106571262B (en) | 2019-03-12 |
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