CN112053889B - Vacuum circuit breaker with isolation function - Google Patents
Vacuum circuit breaker with isolation function Download PDFInfo
- Publication number
- CN112053889B CN112053889B CN202010982032.1A CN202010982032A CN112053889B CN 112053889 B CN112053889 B CN 112053889B CN 202010982032 A CN202010982032 A CN 202010982032A CN 112053889 B CN112053889 B CN 112053889B
- Authority
- CN
- China
- Prior art keywords
- rod
- insulating
- block
- conductive
- terminal
- 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.)
- Active
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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/6606—Terminal arrangements
-
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Landscapes
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
The invention discloses a vacuum circuit breaker with an isolation function, and relates to the technical field of circuit breakers. The connecting terminal comprises a pole, a connecting terminal and an isolating mechanism for connecting the pole and the connecting terminal, wherein the isolating mechanism comprises a conductive arm, a limiting mechanism and a connecting block; the conductive arm comprises a first connecting rod, a second connecting rod and a second spring, wherein one end of the first connecting rod is provided with a guide groove, one end of the second connecting rod is provided with a guide rod which is matched with the guide groove, and the guide rod positioned outside the guide groove is sleeved with the second spring; the two conductive arms are connected through the telescopic insulating connecting parts which are installed in the two different clamping grooves in a matching mode, and the two different conductive surfaces of the two mounted conductive arms are located on the same side. The two conductive arms are oppositely arranged to realize the communication of a circuit, the two conductive arms are pushed to rotate around the connecting end through the rod body, the end parts of the two conductive arms are provided with the protruding mechanisms, the two conductive arms are in a connected or disconnected state under the action of the second spring, and the structure is simple.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a vacuum circuit breaker with an isolation function.
Background
The gas insulated switchgear can make the equipment compact by utilizing the excellent insulating performance of sulfur hexafluoride (SF 6) gas, thereby contributing to the reduction of the space of the electric room. In general, the vacuum circuit breaker incorporated in the gas insulated switchgear is configured such that an operating mechanism of the vacuum circuit breaker is disposed outside a gas container, a main circuit part of the vacuum circuit breaker is disposed inside the gas container, and the operating mechanism and the main circuit part are connected by a shaft which can be driven while maintaining airtightness of the inside and the outside of the gas container.
An indoor high-voltage isolating switch is a high-voltage electrical appliance which is commonly used in an electric power system and used for switching a power supply line and isolating electrical equipment such as an overhauled high-voltage bus, a breaker and the like from the high-voltage power supply line, and a vacuum breaker is switching electrical equipment used for breaking and protecting the power supply line. At present, in a 12kV power distribution system, a known indoor high-voltage isolating and grounding switch is only provided with two stations, namely a closing position and an opening position, the isolating switch and a vacuum circuit breaker are separately installed, and a complex mechanical interlocking mechanism needs to be arranged between the isolating switch and the vacuum circuit breaker, so that the switch cabinet is large in size and complex in structure. With the upgrading and upgrading of the switch equipment, the miniaturization and combination become the development trend of the switch equipment, and particularly, the appearance of a small fixed cabinet makes the structure of the electric equipment needing to be matched more compact and more miniaturized; in addition, the existing high-voltage isolating switch cannot realize quick disconnection.
Disclosure of Invention
The invention aims to provide a vacuum circuit breaker with an isolation function, which realizes the communication of a circuit through two oppositely installed conductive arms, pushes the two conductive arms to rotate around a connecting end through a rod body, and ensures that the two conductive arms are in a connected or disconnected state under the action of an installed spring II because the end parts of the conductive arms are provided with a convex mechanism.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a vacuum circuit breaker with an isolation function, which comprises a pole, a wiring terminal and an isolation mechanism for connecting the pole and the wiring terminal, wherein the isolation mechanism comprises a conductive arm, a limiting mechanism and a connecting block; the conductive arm comprises a first connecting rod, a second connecting rod and a second spring, a guide groove is formed in one end of the first connecting rod, a guide rod which is matched with the guide groove is formed in one end of the second connecting rod, and the second spring is sleeved on the guide rod which is positioned outside the guide groove; the other end of the connecting rod II, which is opposite to the guide rod, is provided with a clamping groove II, the end surface of the clamping groove II is provided with a convex structure, one inclined surface forming the convex structure is a conductive surface, and the other inclined surface is an insulating surface; the two conductive arms are connected through telescopic insulating connecting parts which are arranged in the two different clamping grooves in a matching manner, and two different conductive surfaces of the two mounted conductive arms are positioned on the same side; the bottom of the telescopic insulating connecting part is movably connected with a rod body, the end part of the rod body is provided with a plate body II which drives the rod body to move, and the bottom surface of the plate body II is provided with a pull ring.
Furthermore, a first wiring terminal is arranged on the pole; a second wiring end is arranged on the wiring terminal; one end of the first connecting rod, which is opposite to the guide groove, is provided with a first clamping groove, and the first clamping groove is rotatably arranged on the first wiring end or the second wiring end.
Furthermore, the telescopic insulating connecting part comprises a limiting mechanism and a connecting block; the limiting mechanism comprises an insulating block, an insulating rod, a first spring, a limiting block and a connecting seat;
an insulating rod is fixed on two opposite side surfaces of the insulating block, a first spring is sleeved on the insulating rod, a limiting block is arranged on the end surface of the insulating rod, and a connecting seat is arranged on the other side surface, adjacent to the side surface where the insulating rod is located, of the insulating block;
the connecting block is sleeved on the insulating rod through the opened through hole, and the first spring installed at the same time pushes the connecting block to move to one side.
Furthermore, another side adjacent with through-hole place side in the connecting block is opened there is the shaft hole, the connecting block cooperation is in draw-in groove two to carry out the rotation through the shank that passes draw-in groove two and shaft hole in proper order and connect.
Furthermore, the connecting seat is connected with the top end of the rod body through a pin shaft.
Furthermore, the protruding structure of the second connecting rod is composed of an insulating block and a conductive block, and the height of the conductive block is smaller than that of the insulating block.
Furthermore, the pole is fixed on the second base, the wiring terminal is fixed on the first base, the second base and the first base are spliced to form a flat plate structure, and meanwhile, the first wiring end of the pole is as high as the second wiring end of the wiring terminal.
Furthermore, a slotted hole corresponding to the telescopic insulating connecting part is formed in the first base, a first plate body is installed in the slotted hole, a rod body is formed on the first plate body, and the installed rod body penetrates through the unthreaded hole.
Further, the connecting terminal 305 is made of a non-conductive material.
The invention has the following beneficial effects:
the two conductive arms are oppositely arranged to realize the communication of a circuit, the two conductive arms are pushed to rotate around the connecting end through the rod body, the end parts of the two conductive arms are provided with the protruding mechanisms, the two conductive arms are in a connected or disconnected state under the action of the second spring, and the structure is simple.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic bottom view of the present invention;
FIG. 3 is a schematic view of an isolation structure of the present invention;
FIG. 4 is a schematic view of a conductive arm structure according to the present invention;
FIG. 5 is a schematic side view of a conductive arm according to the present invention;
FIG. 6 isbase:Sub>A schematic view of the cross-sectional structure A-A of FIG. 5 according to the present invention;
FIG. 7 is a schematic view of the structure of the limiting mechanism of the present invention;
FIG. 8 is a schematic view of the connecting block structure of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-pole, 101-terminal I, 2-conductive arm, 201-connecting rod I, 2011-clamping groove I, 2012-guide groove, 202-connecting rod II, 2021-guide rod, 2022-insulating block, 2023-conductive surface, 2024-insulating surface, 2025-clamping groove II, 203-spring II, 3-limiting mechanism, 301-insulating block, 302-insulating rod, 303-spring I, 304-limiting block, 305-connecting seat, 4-connecting block, 401-through hole, 402-shaft hole, 5-connecting terminal, 501-terminal II, 6-pole body, 7-plate I, 8-plate II, 801-pull ring, 9-base I and 10-base II.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-8, the present invention is a vacuum circuit breaker with an isolation function, including a terminal 1, a connection terminal 5 and an isolation mechanism for connecting the terminal 1 and the connection terminal 5, wherein the connection terminal 5 is made of a non-conductive material to ensure safety in use, and the isolation mechanism includes a conductive arm 2, a limiting mechanism 3 and a connection block 4; the terminal 1 is provided with a first wiring terminal 101; a second wiring terminal 501 is arranged on the wiring terminal 5; one end of the first connecting rod 201, which is opposite to the guide groove 2012, is provided with a first clamping groove 2011, and the first clamping groove 2011 is rotatably installed on the first terminal 101 or the second terminal 501;
the conductive arm 2 comprises a first connecting rod 201, a second connecting rod 202 and a second spring 203, wherein one end of the first connecting rod 201 is provided with a guide groove 2012, one end of the second connecting rod 202 is provided with a guide rod 2021 which is matched with the guide groove 2012 for installation, and the guide rod 2021 positioned outside the guide groove 2012 is sleeved with the second spring 203;
the other end of the second connecting rod 202, opposite to the guide rod 2021, is provided with a second clamping groove 2025, the end face of the second clamping groove 2025 is provided with a convex structure, one inclined plane forming the convex structure is a conductive surface 2023, and the other inclined plane is an insulating surface 2024; the protruding structure of the second connecting rod 202 is composed of an insulating block 2022 and a conductive block, the height of the conductive block is smaller than that of the insulating block 2022, and the conductive block is guaranteed to be in a disconnected state, so that a conductive surface cannot be contacted;
the two conductive arms 2 are connected through the telescopic insulating connecting parts which are arranged in the two different clamping grooves 2025 in a matching way, and two different conductive surfaces 2023 of the two mounted conductive arms 2 are positioned on the same side; the telescopic insulating connecting part comprises a limiting mechanism 3 and a connecting block 4; the limiting mechanism 3 comprises an insulating block 301, an insulating rod 302, a first spring 303, a limiting block 304 and a connecting seat 305; an insulating rod 302 is fixed on two opposite side surfaces of the insulating block 301, a first spring 303 is sleeved on the insulating rod 302, a limiting block 304 is installed on the end surface of the insulating rod 302, and a connecting seat 305 is arranged on the other side surface, adjacent to the side surface where the insulating rod 302 is located, of the insulating block 301;
the connecting block 4 is sleeved on the insulating rod 302 through a through hole 401, and meanwhile, a first spring 303 arranged pushes the connecting block 4 to move to one side; the other side face, adjacent to the side face where the through hole 401 is located, of the connecting block 4 is provided with a shaft hole 402, the connecting block 4 is matched in the second clamping groove 2025 and is in rotary connection through a pin body sequentially penetrating through the second clamping groove 2025 and the shaft hole 402; the connecting base 305 is connected with the top end of the rod body 6 through a pin shaft, so that the rotation is convenient to realize;
the terminal 1 is fixed on the second base 10, the wiring terminal 5 is fixed on the first base 9, the second base 10 and the first base 9 are spliced to form a flat plate structure, and meanwhile, the first wiring end 101 of the terminal 1 and the second wiring end 501 of the wiring terminal 5 are the same in height, so that the two conductive arms 2 can be conveniently installed;
the bottom swing joint of flexible insulating connecting portion has the body of rod 6, and the plate body two 8 that drives its motion is installed to the tip of the body of rod 6, and pull ring 801 is installed to the bottom surface of plate body two 8, and base one 9 is opened has the slotted hole that corresponds with flexible insulating connecting portion, installs a plate body 7 in the slotted hole, and it has the body of rod 6 to open on the plate body 7, and the body of rod 6 after the installation passes the unthreaded hole, prescribes a limit to the direction of motion of the body of rod 6.
The two conductive arms 2 which are oppositely arranged are communicated with each other, the two conductive arms 2 are pushed to rotate around the connecting end through the rod body 6, the end parts of the conductive arms 2 are protruding mechanisms, and the two conductive arms 2 are in a connected or disconnected state under the action of the second installed spring 203, so that the structure is simple.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a vacuum circuit breaker with isolation function, includes utmost point post (1), binding post (5) and is used for utmost point post (1) and binding post (5) to be connected's isolating mechanism, its characterized in that:
the isolation mechanism comprises a conductive arm (2), a limiting mechanism (3) and a connecting block (4);
the conductive arm (2) comprises a first connecting rod (201), a second connecting rod (202) and a second spring (203), a guide groove (2012) is formed in one end of the first connecting rod (201), a guide rod (2021) which is installed in a matched mode with the guide groove (2012) is formed in one end of the second connecting rod (202), and the second spring (203) is sleeved on the guide rod (2021) located outside the guide groove (2012);
a second clamping groove (2025) is formed in the other end, opposite to the guide rod (2021), of the second connecting rod (202), a protruding structure is arranged on the end face of the second clamping groove (2025), one inclined plane forming the protruding structure is a conducting surface (2023), and the other inclined plane is an insulating surface (2024);
the two conductive arms (2) are connected through telescopic insulating connecting parts which are arranged in two different clamping grooves II (2025) in a matching way, and two different conductive surfaces (2023) in the two mounted conductive arms (2) are positioned on the same side;
the bottom of the telescopic insulating connecting part is movably connected with a rod body (6), the end part of the rod body (6) is provided with a second plate body (8) driving the rod body to move, and the bottom surface of the second plate body (8) is provided with a pull ring (801);
the telescopic insulating connecting part comprises a limiting mechanism (3) and a connecting block (4);
the limiting mechanism (3) comprises a first insulating block (301), an insulating rod (302), a first spring (303), a limiting block (304) and a connecting seat (305);
an insulating rod (302) is fixed on two opposite side surfaces of the first insulating block (301), a first spring (303) is sleeved on the insulating rod (302), a limiting block (304) is installed on the end surface of the insulating rod (302), and a connecting seat (305) is arranged on the other side surface, adjacent to the side surface where the insulating rod (302) is located, of the first insulating block (301);
the connecting block (4) is sleeved on the insulating rod (302) through a through hole (401), and meanwhile, a first spring (303) arranged pushes the connecting block (4) to move to one side;
the protruding structure of the second connecting rod (202) is composed of a second insulating block (2022) and a conductive block, and the height of the conductive block is smaller than that of the second insulating block (2022);
the terminal post (1) is fixed on a second base (10), the wiring terminal (5) is fixed on a first base (9), the second base (10) and the first base (9) are spliced to form a flat plate structure, and meanwhile, the first wiring terminal (101) of the terminal post (1) and the second wiring terminal (501) of the wiring terminal (5) are the same in height;
the telescopic insulation connecting structure is characterized in that a slotted hole corresponding to the telescopic insulation connecting part is formed in the first base (9), a first plate body (7) is installed in the slotted hole, a rod body (6) is formed in the first plate body (7), and the installed rod body (6) penetrates through the slotted hole.
2. The vacuum circuit breaker with the isolation function according to claim 1, wherein a first terminal (101) is arranged on the pole (1);
a second wiring terminal (501) is arranged on the wiring terminal (5);
one end of the first connecting rod (201) opposite to the guide groove (2012) is provided with a first clamping groove (2011), and the first clamping groove (2011) is rotatably installed on the first terminal (101) or the second terminal (501).
3. The vacuum circuit breaker with the isolation function according to claim 1, wherein a shaft hole (402) is formed in the other side surface of the connecting block (4) adjacent to the side surface where the through hole (401) is located, and the connecting block (4) is fitted in the second clamping groove (2025) and is rotatably connected through a pin body sequentially passing through the second clamping groove (2025) and the shaft hole (402).
4. Vacuum circuit breaker with isolating function according to claim 1, characterized in that the connecting base (305) is connected to the top end of the rod (6) by a pin.
5. Vacuum interrupter as in claim 1, characterized in that the main body of the connecting terminal (5) is of non-conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982032.1A CN112053889B (en) | 2020-09-17 | 2020-09-17 | Vacuum circuit breaker with isolation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982032.1A CN112053889B (en) | 2020-09-17 | 2020-09-17 | Vacuum circuit breaker with isolation function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112053889A CN112053889A (en) | 2020-12-08 |
| CN112053889B true CN112053889B (en) | 2022-10-28 |
Family
ID=73603080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010982032.1A Active CN112053889B (en) | 2020-09-17 | 2020-09-17 | Vacuum circuit breaker with isolation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112053889B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114023597B (en) * | 2021-11-13 | 2024-04-16 | 安徽明远电力设备制造有限公司 | Outdoor high-voltage alternating current vacuum circuit breaker |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6198062B1 (en) * | 1999-05-17 | 2001-03-06 | Joslyn Hi-Voltage Corporation | Modular, high-voltage, three phase recloser assembly |
| CN204289241U (en) * | 2015-01-16 | 2015-04-22 | 浙江汉高电力科技有限公司 | A kind of outdoor high-voltage vacuum breaker |
| CN104576175A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | High-voltage double-break circuit breaker |
| CN205140848U (en) * | 2015-11-09 | 2016-04-06 | 西南交通大学 | Open high voltage isolator that opens ice perpendicularly |
| CN107731619A (en) * | 2017-11-14 | 2018-02-23 | 宁波天安智能电网科技股份有限公司 | A kind of High aititude indoor HVAC combined vacuum breaker |
| CN109193399A (en) * | 2018-10-15 | 2019-01-11 | 武胜县烈面镇小学 | A kind of isolator |
| CN210607087U (en) * | 2019-10-23 | 2020-05-22 | 宁波天安智能电网科技股份有限公司 | Combined high-voltage vacuum circuit breaker |
| CN111489911A (en) * | 2020-04-09 | 2020-08-04 | 陕西省地方电力(集团)有限公司延安供电分公司 | Anti-overheating and anti-corrosion high-voltage alternating-current isolating switch |
-
2020
- 2020-09-17 CN CN202010982032.1A patent/CN112053889B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6198062B1 (en) * | 1999-05-17 | 2001-03-06 | Joslyn Hi-Voltage Corporation | Modular, high-voltage, three phase recloser assembly |
| CN104576175A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | High-voltage double-break circuit breaker |
| CN204289241U (en) * | 2015-01-16 | 2015-04-22 | 浙江汉高电力科技有限公司 | A kind of outdoor high-voltage vacuum breaker |
| CN205140848U (en) * | 2015-11-09 | 2016-04-06 | 西南交通大学 | Open high voltage isolator that opens ice perpendicularly |
| CN107731619A (en) * | 2017-11-14 | 2018-02-23 | 宁波天安智能电网科技股份有限公司 | A kind of High aititude indoor HVAC combined vacuum breaker |
| CN109193399A (en) * | 2018-10-15 | 2019-01-11 | 武胜县烈面镇小学 | A kind of isolator |
| CN210607087U (en) * | 2019-10-23 | 2020-05-22 | 宁波天安智能电网科技股份有限公司 | Combined high-voltage vacuum circuit breaker |
| CN111489911A (en) * | 2020-04-09 | 2020-08-04 | 陕西省地方电力(集团)有限公司延安供电分公司 | Anti-overheating and anti-corrosion high-voltage alternating-current isolating switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112053889A (en) | 2020-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0444345A2 (en) | Switch for electrical distribution | |
| CN106253120B (en) | A kind of solid insulation switch for integrating breaker and disconnecting switch | |
| CN201893269U (en) | High-voltage disconnector contact component | |
| CN112466701B (en) | Double-break linkage type three-station isolation grounding switch structure | |
| CN214479039U (en) | Common-box type gas insulation switch cabinet | |
| CN112053889B (en) | Vacuum circuit breaker with isolation function | |
| CN2578956Y (en) | Direct-actuated three position switch | |
| CN211208317U (en) | Isolated vacuum circuit breaker | |
| CN103166143A (en) | Solid dead ring main unit | |
| CN115986612B (en) | Fixed switch cabinet | |
| CN209118985U (en) | Three station high-pressure vacuum breakers | |
| CN217690935U (en) | Double-fracture isolating switch | |
| CN203135294U (en) | Solid insulation ring main unit | |
| CN211088097U (en) | Main loop single-pole device of automatic change-over switch electric appliance | |
| CN112053888B (en) | Vacuum circuit breaker based on isolation structure | |
| CN202977287U (en) | Insulation pull bar structure | |
| CN212570818U (en) | Earthing switch for high-voltage switch cabinet maintenance | |
| CN109243883B (en) | Vacuum load looped netowrk cabinet of isolation linkage | |
| CN219476562U (en) | Isolating switch fuse set | |
| CN220272363U (en) | Two-station isolation grounding device for GIS | |
| CN209880515U (en) | Internal series structure of high-voltage direct-current molded case circuit breaker | |
| CN203013602U (en) | Directly-operated type earthing switch | |
| CN109166746B (en) | Breaking and closing method of isolation linkage vacuum load switch | |
| CN219575483U (en) | Three-station isolating switch | |
| CN214589875U (en) | High-voltage isolation switch cabinet with insulation isolation board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |