CN115332006A - Arc extinguishing device of direct current isolating switch in cabinet - Google Patents
Arc extinguishing device of direct current isolating switch in cabinet Download PDFInfo
- Publication number
- CN115332006A CN115332006A CN202211249810.1A CN202211249810A CN115332006A CN 115332006 A CN115332006 A CN 115332006A CN 202211249810 A CN202211249810 A CN 202211249810A CN 115332006 A CN115332006 A CN 115332006A
- Authority
- CN
- China
- Prior art keywords
- knife valve
- movable knife
- shaft
- cabinet
- direct current
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses an arc extinguishing device of a direct current isolating switch in a cabinet, which comprises: the insulating base and a first moving knife valve and a second moving knife valve which are rotatably arranged on the insulating base, wherein an insulating support plate is fixedly arranged at the middle position on the insulating base, the first moving knife valve and the second moving knife valve are both rotatably arranged on the insulating support plate, and the first moving knife valve is communicated with the second moving knife valve through a circuit; the lower ends of the first movable knife valve and the second movable knife valve are fixedly sleeved with rotating pieces, the linkage mechanism is connected between the two rotating pieces and comprises a traction shaft; the starting mechanism comprises a connecting ring and a connecting rod. This device simple structure utilizes the breakdown effect of high current-voltage to the air to make protection mechanism can carry out the arc extinction to the circuit, thereby play the effect of direct current isolator in the protection cabinet, after the air that is punctured discharges, this device can also continue the use next time.
Description
Technical Field
The invention belongs to the technical field of direct-current isolating switches in cabinets, and particularly relates to an arc extinction device of a direct-current isolating switch in a cabinet.
Background
Direct current isolator is as a switch that prevents alternating current and direct current open circuit in the cabinet, lay in the voltage cabinet of power supply, because the current-voltage that flows through in the voltage cabinet is higher, the requirement security of current to the voltage cabinet is more and more high, the arrangement geographical position of voltage cabinet is lower, when the voltage cabinet is because thunder and lightning or short circuit scheduling problem, when the high voltage condition appears, direct current isolator can handle the short circuit problem, but when the electric current is too big, although can in time cut off the power supply, corresponding protection mechanism will be launched to the short-term electric current is too big, protection mechanism can make whole circuit disconnection in order to avoid the internals to continue to receive the damage, the general disconnection of circuit can influence the normal operating of other equipment, need the staff to renovate it to the circuit disconnection back, the in-process power failure of waiting to renovate can cause certain loss.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides an arc extinguishing device for a direct current isolating switch in a cabinet.
The invention provides an arc extinguishing device for an in-cabinet direct-current isolating switch, which comprises:
the device comprises an insulating base, a first movable knife valve and a second movable knife valve which are rotatably arranged on the insulating base, wherein an insulating support plate is fixedly arranged at the middle position on the insulating base;
the lower ends of the first movable knife valve and the second movable knife valve are fixedly sleeved with rotating pieces, the linkage mechanism is connected between the two rotating pieces and comprises a traction shaft;
the starting mechanism comprises a connecting ring and a connecting rod, an installation block is arranged between the connecting ring and the connecting rod, and the starting mechanism is connected with the second movable knife valve;
the protection mechanism, insulating encapsulation box is installed to insulating base's bottom, first recess and second recess have been seted up in the encapsulation box, the protection mechanism sets up in the encapsulation box.
Further, the first outer surface that moves the sword valve and the second moves the sword valve is all fixed to be cup jointed and is used for insulation protection's ceramic cover, the first upper end fixed mounting who moves the sword valve has first connecting block, one side of first connecting block is inserted and is equipped with first wiring board, the second moves the upper end fixed mounting who moves the sword valve and has the second connecting block, one side of second connecting block is inserted and is equipped with the second wiring board, the one end that first connecting block was kept away from to first wiring board is provided with U type connecting plate, be provided with the contact on the inner wall of U type connecting plate, the end of second wiring board is inserted and is established in U type connecting plate and offset with the contact.
Further, the link gear still includes that two rotate and installs the pivot on the rotor plate, the spout has all been seted up at the both ends of pulling the axle, the one end that the rotor plate was kept away from in the pivot is fixed to be inserted and is established in the spout, two one side of rotor plate all is provided with triangle pointed end, the pivot is rotated and is installed on the triangle pointed end, one of them the orientation position that is another triangle pointed end after 90 rotates is pointed end to the triangle.
Furthermore, one end of the connecting ring is sleeved on the second movable knife valve, a placing groove is formed in the mounting block, a glass tube is mounted in the placing groove, air is filled in the glass tube, and the connecting rod is fixedly connected to the insulating base.
Further, protection mechanism still includes spring, coil and iron core, the spring mounting is in the second recess, the winding of insulating backup pad is on the iron core, the iron core is fixed on the inner wall of first recess, the one end fixed connection of spring just is connected with the connecting rod electricity on the inner wall of second recess, the other end fixedly connected with universal driving shaft of spring, spring surface cover has the insulating layer, the universal driving shaft passes second recess slip and inserts and establish in the first recess, the universal driving shaft passes through coupling mechanism with the coil and is connected, actuating mechanism and spring circuit establish ties.
Further, coupling mechanism includes protruding axle and the fixed axle of fixed connection at the universal driving shaft end, the one end fixedly connected with connecting axle of coil, connecting axle and fixed axle fixed connection, be provided with on the connecting axle and contact the piece, be provided with on the protruding axle with contact the bump that the piece cooperation was used.
Furthermore, all be covered with the protection casing on first recess and the second recess.
Compared with the prior art, the invention has the beneficial effects that:
1. the device is simple in structure, and utilizes the breakdown effect of high current and voltage on air, so that the protection mechanism can extinguish arcs of a circuit, and the effect of protecting a direct-current isolating switch in a cabinet is achieved;
2. this device can effectual protection circuit, and internal component does not receive the condition of damage simultaneously, can continue to use after short duration repairment to the effectual influence of avoiding the whole outage of circuit to cause.
Drawings
Fig. 1 is a left side structural schematic diagram of an arc extinguishing device of an in-cabinet direct current isolating switch provided by the invention;
fig. 2 is a schematic diagram of a right side structure of an arc extinguishing device of an in-cabinet direct current isolation switch provided by the invention;
fig. 3 is a schematic top view of an arc extinguishing device for an in-cabinet dc isolation switch according to the present invention;
FIG. 4 is a schematic view of the interior of the enclosure;
fig. 5 is a schematic view of the structure at a in fig. 4.
In the figure: 1 insulating base, 2 insulating support plates, 3 packaging boxes, 4 first grooves, 5 second grooves, 6 connecting rods, 7 rotating blades, 8 second moving blade valves, 9 ceramic sleeves, 10 first moving blade valves, 11 mounting blocks, 12 placing grooves, 13 glass tubes, 14 traction shafts, 15 connecting rings, 16 second connecting blocks, 17 second connecting plates, 18U type connecting plates, 19 contacts, 20 first connecting plates, 21 first connecting blocks, 22 rotating shafts, 23 sliding grooves, 24 springs, 25 linkage shafts, 26 fixing shafts, 27 protruding shafts, 28 coils, 29 iron cores, 30 connecting shafts, 31 contact blocks and 32 protruding points.
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.
Referring to fig. 1 to 5, an arc extinguishing apparatus for an in-cabinet dc isolation switch, the arc extinguishing apparatus comprising:
the device comprises an insulating base 1, a first movable knife valve 10 and a second movable knife valve 8 which are rotatably arranged on the insulating base 1, wherein an insulating support plate 2 is fixedly arranged at the middle position on the insulating base 1, the first movable knife valve 10 and the second movable knife valve 8 are both rotatably arranged on the insulating support plate 2, and the first movable knife valve 10 is in circuit communication with the second movable knife valve 8;
the lower ends of the first moving knife valve 10 and the second moving knife valve 8 are fixedly sleeved with the rotating blades 7, the linkage mechanism is connected between the two rotating blades 7, and the linkage mechanism comprises a traction shaft 14;
the starting mechanism comprises a connecting ring 15 and a connecting rod 6, an installation block 11 is arranged between the connecting ring 15 and the connecting rod 6, and the starting mechanism is connected with the second movable knife valve 8;
the protection mechanism, insulating encapsulation box 3 is installed to the bottom of insulating base 1, has seted up first recess 4 and second recess 5 in the encapsulation box 3, and the protection mechanism sets up in encapsulation box 3.
The outer surfaces of the first movable knife valve 10 and the second movable knife valve 8 are fixedly sleeved with ceramic sleeves 9 for insulation protection, a first connecting block 21 is fixedly installed at the upper end of the first movable knife valve 10, a first wiring board 20 is inserted into one side of the first connecting block 21, a second connecting block 16 is fixedly installed at the upper end of the second movable knife valve 8, a second wiring board 17 is inserted into one side of the second connecting block 16, a U-shaped connecting board 18 is arranged at one end, far away from the first connecting block 21, of the first wiring board 20, a contact 19 is arranged on the inner wall of the U-shaped connecting board 18, and the tail end of the second wiring board 17 is inserted into the U-shaped connecting board 18 and abuts against the contact 19; when the first moving knife valve 10 and the second moving knife valve 8 are pushed by the linkage mechanism to rotate, the first wiring board 20 and the second wiring board 17 rotate to the directions facing each other, the second wiring board 17 is inserted into the U-shaped connecting board 18, the contact 19 is in contact with the second wiring board 17, and the electric connection effect between the first moving knife valve 10 and the second moving knife valve 8 is achieved.
The linkage mechanism further comprises two rotating shafts 22 which are rotatably installed on the rotating pieces 7, sliding grooves 23 are formed in two ends of the traction shaft 14, one ends, far away from the rotating pieces 7, of the rotating shafts 22 are fixedly inserted into the sliding grooves 23, triangular tip ends are arranged on one sides of the two rotating pieces 7, the rotating shafts 22 are rotatably installed on the triangular tip ends, and the position, facing the other triangular tip end, of one triangular tip end is determined after the other triangular tip end rotates 90 degrees; the linkage mechanism formed by combining the traction shaft 14 and the rotating shaft 22 can drive one rotating piece 7 to move when the other rotating piece 7 rotates, and the second wiring board 17 and the U-shaped connecting board 18 are symmetrically arranged in a mutually facing mode due to the fact that the difference between the two rotating pieces 7 is 90 degrees, so that the second wiring board 17 and the first wiring board 20 can rotate to be in a mutually facing state.
One end of the connecting ring 15 is sleeved on the second moving knife valve 8, a placing groove 12 is formed in the mounting block 11, a glass tube 13 is mounted in the placing groove 12, air is filled in the glass tube 13, and the connecting rod 6 is fixedly connected to the insulating base 1; the connecting ring 15, the glass tube 13 and the connecting rod 6 are all connected into the circuit, under the condition of normal voltage and current, the circuit is in a phrase state due to the fact that air is filled inside the circuit, and when the current and voltage are too large, the air inside the circuit can be broken down, so that the circuit is communicated.
The protection mechanism further comprises a spring 24, a coil 28 and an iron core 29, the spring 24 is installed in the second groove 5, the insulating support plate 2 is wound on the iron core 29, the iron core 29 is fixed on the inner wall of the first groove 4, one end of the spring 24 is fixedly connected on the inner wall of the second groove 5 and electrically connected with the connecting rod 6, the other end of the spring 24 is fixedly connected with a linkage shaft 25, an insulating layer is sleeved on the outer surface of the spring 24, the linkage shaft 25 penetrates through the second groove 5 and is slidably inserted into the first groove 4, the linkage shaft 25 is connected with the coil 28 through a connecting mechanism, and the starting mechanism is in circuit series connection with the spring 24; when the actuator is energized, the spring 24 will also be energized, and the energized spring 24 will contract, which will move the linkage mechanism to engage the coil 28 into the circuit.
The connecting mechanism comprises a convex shaft 27 and a fixed shaft 26 which are fixedly connected with the tail end of the linkage shaft 25, one end of the coil 28 is fixedly connected with a connecting shaft 30, the connecting shaft 30 is fixedly connected with the fixed shaft 26, a contact block 31 is arranged on the connecting shaft 30, and a convex point 32 matched with the contact block 31 for use is arranged on the convex shaft 27; when the linkage shaft 25 moves, the convex points 32 are driven to be in contact with the contact blocks 31 through the convex shafts 27, so that the coil 28 is connected into a circuit, the coil 28 generates reactance, the circuit is protected, and the first groove 4 and the second groove 5 are both covered with protective covers.
When the voltage cabinet is in normal operation, when the second movable knife valve 8 and the first movable knife valve 10 need to be connected, the rotation of one rotating blade 7 can be realized through external equipment, when one rotating blade 7 rotates, the other rotating blade 7 can be driven to rotate through the traction shaft 14, two ends of the traction shaft 14 are respectively connected with the two rotating blades 7 in a rotating mode through the rotating shaft 22, the rotating shaft 22 is provided with the sliding groove 23, the length formed by combining the rotating shaft 22 and the traction shaft 14 is certain, when one rotating blade 7 rotates, the other rotating blade 7 can be pushed to rotate, or when one rotating blade 7 rotates, the other rotating blade 7 can be pulled to rotate, in an initial state, the tail ends of the second wiring board 17 fixedly connected to the upper end of the second movable knife valve 8 and the first movable knife valve 10 face away from each other, namely, one of the tail ends of the first wiring board 20 fixedly connected to the upper end of the first movable knife valve 10 faces to the right side, when the second movable knife valve 8 rotates 90 degrees, the tail ends of the first wiring board 10 and the second wiring board 10 are driven to rotate clockwise, and then the tail ends of the second movable knife valve 8 and the second wiring board 18 are connected with the second movable knife valve 10, and the tail ends of the second movable knife valve 18 are connected with the tail ends of the first wiring board 18 and the second movable knife valve 17, and the tail ends of the second knife valve 17, and the second knife valve are connected in a contact point of the first knife valve 17, and the first wiring board 18;
when a circuit abnormal condition occurs, namely a lightning stroke or a grounding problem occurs, a large current passes through, an excessive current passing through the second moving knife valve 8 also passes through the connecting ring 15, wherein the gas is filled in the placing groove 12, under a normal voltage and current state, the gas in the placing groove 12 forms a short circuit state, and an abnormal high current breaks through the gas in the placing groove 12, so that the connecting ring 15 and the connecting rod 6 form a circuit access state, the spring 24 connected with the connecting rod 6 can pass through the current, because the spring 24 is in a spiral state, the energized spring 24 can have magnetism and attract each other to shrink, the length of the spring 24 can be reduced, one end of the spring 24 far away from the first groove 4 is fixedly connected on the inner wall of the second groove 5, and the other end of the spring 24 is fixedly connected with the linkage shaft 25, the contraction of the spring 24 can drive the linkage shaft 25 to move, one end, far away from the spring 24, of the linkage shaft 25 is inserted into the first groove 4, the movement of the linkage shaft 25 can drive the protruding shaft 27 to move, the protruding shaft 27 of the movement can enable the protruding points 32 to be contacted and abutted with the contact blocks 31, the contact blocks 31 are connected with the coils 28 through the connecting shafts 30, the linkage shaft 25 is connected with the coils 28, the coils 28 can be connected into a circuit, the coils 28 are wound on the iron cores 29, the coils 28 after being electrified can generate large reactance, the transient current caused by lightning stroke and the like is resisted, the effective arc extinguishing effect is achieved, the air can be continuously discharged after being punctured, the air after being punctured can be continuously discharged, the circuit can continuously consume electric energy in the protection use process, the circuit can also recover to a normal state along with the electric quantity consumption of the air, and the starting mechanism can be repeatedly used.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. An arc extinguishing device for an in-cabinet direct-current isolating switch is characterized by comprising:
the device comprises an insulating base (1), a first movable knife valve (10) and a second movable knife valve (8), wherein the first movable knife valve (10) and the second movable knife valve (8) are rotatably arranged on the insulating base (1), an insulating support plate (2) is fixedly arranged at the middle position of the insulating base (1), the first movable knife valve (10) and the second movable knife valve (8) are both rotatably arranged on the insulating support plate (2), and the first movable knife valve (10) is communicated with the second movable knife valve (8) in a circuit manner;
the lower ends of the first movable knife valve (10) and the second movable knife valve (8) are fixedly sleeved with the rotating blades (7), the linkage mechanism is connected between the two rotating blades (7), and the linkage mechanism comprises a traction shaft (14);
the starting mechanism comprises a connecting ring (15) and a connecting rod (6), an installation block (11) is installed between the connecting ring (15) and the connecting rod (6), and the starting mechanism is connected with the second movable knife valve (8);
the protection mechanism, insulating encapsulation box (3) are installed to the bottom of insulating base (1), first recess (4) and second recess (5) have been seted up in encapsulation box (3), protection mechanism sets up in encapsulation box (3).
2. The arc extinction device of the direct current isolating switch in the cabinet is characterized in that the outer surfaces of the first movable knife valve (10) and the second movable knife valve (8) are fixedly sleeved with a ceramic sleeve (9) for insulation protection, a first connecting block (21) is fixedly installed at the upper end of the first movable knife valve (10), a first wiring board (20) is inserted into one side of the first connecting block (21), a second connecting block (16) is fixedly installed at the upper end of the second movable knife valve (8), a second wiring board (17) is inserted into one side of the second connecting block (16), a U-shaped connecting board (18) is arranged at one end, far away from the first connecting block (21), of the first wiring board (20), a contact (19) is arranged on the inner wall of the U-shaped connecting board (18), and the tail end of the second wiring board (17) is inserted into the U-shaped connecting board (18) and abuts against the contact (19).
3. The arc extinction device of the direct current isolation switch in the cabinet according to claim 1, wherein the linkage mechanism further includes two rotating shafts (22) rotatably mounted on the rotating plates (7), sliding grooves (23) are respectively formed at both ends of the traction shaft (14), one end of the rotating shaft (22) far away from the rotating plates (7) is fixedly inserted in the sliding grooves (23), triangular tips are respectively disposed at one side of the two rotating plates (7), the rotating shaft (22) is rotatably mounted on the triangular tips, and when one of the triangular tips rotates 90 degrees, the other triangular tip faces the other triangular tip.
4. The arc extinction device of the direct current isolating switch in the cabinet is characterized in that one end of the connecting ring (15) is sleeved on the second movable knife valve (8), a placing groove (12) is formed in the mounting block (11), a glass tube (13) is mounted in the placing groove (12), the glass tube (13) is filled with air, and the connecting rod (6) is fixedly connected to the insulating base (1).
5. An arc extinguishing device of an in-cabinet direct current isolating switch according to claim 1, wherein the protection mechanism further comprises a spring (24), a coil (28) and an iron core (29), the spring (24) is installed in the second groove (5), the insulating support plate (2) is wound on the iron core (29), the iron core (29) is fixed on the inner wall of the first groove (4), one end of the spring (24) is fixedly connected on the inner wall of the second groove (5) and electrically connected with the connecting rod (6), the other end of the spring (24) is fixedly connected with a linkage shaft (25), an insulating layer is sleeved on the outer surface of the spring (24), the linkage shaft (25) penetrates through the second groove (5) to be slidably inserted in the first groove (4), the linkage shaft (25) is connected with the coil (28) through a connecting mechanism, and the starting mechanism is connected with the spring (24) in series.
6. An arc extinguishing device for a DC disconnector in a cabinet according to claim 5, wherein the connecting mechanism comprises a protruding shaft (27) and a fixed shaft (26) fixedly connected to the tail end of the linkage shaft (25), one end of the coil (28) is fixedly connected with a connecting shaft (30), the connecting shaft (30) is fixedly connected with the fixed shaft (26), the connecting shaft (30) is provided with a contact block (31), and the protruding shaft (27) is provided with a salient point (32) matched with the contact block (31).
7. An arc extinction device for an in-cabinet direct current isolation switch according to claim 1, wherein the first recess (4) and the second recess (5) are covered with a protective cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211249810.1A CN115332006B (en) | 2022-10-12 | 2022-10-12 | Arc extinction device of direct-current isolating switch in cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211249810.1A CN115332006B (en) | 2022-10-12 | 2022-10-12 | Arc extinction device of direct-current isolating switch in cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115332006A true CN115332006A (en) | 2022-11-11 |
| CN115332006B CN115332006B (en) | 2023-04-21 |
Family
ID=83913852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211249810.1A Active CN115332006B (en) | 2022-10-12 | 2022-10-12 | Arc extinction device of direct-current isolating switch in cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115332006B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953264A (en) * | 2017-04-05 | 2017-07-14 | 珠海航天科创实业有限公司 | A kind of environmentally friendly gas insulation switch cabinet |
| CN206742737U (en) * | 2017-04-05 | 2017-12-12 | 珠海航天科创实业有限公司 | A kind of environmentally friendly gas insulation switch cabinet |
| CN107658173A (en) * | 2017-10-19 | 2018-02-02 | 武汉倍诺德开关股份有限公司 | A kind of electric railway disconnecting switch |
| CN113990636A (en) * | 2021-09-22 | 2022-01-28 | 吴冬枚 | Energy-saving transformer with automatic overload protection function |
-
2022
- 2022-10-12 CN CN202211249810.1A patent/CN115332006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953264A (en) * | 2017-04-05 | 2017-07-14 | 珠海航天科创实业有限公司 | A kind of environmentally friendly gas insulation switch cabinet |
| CN206742737U (en) * | 2017-04-05 | 2017-12-12 | 珠海航天科创实业有限公司 | A kind of environmentally friendly gas insulation switch cabinet |
| CN107658173A (en) * | 2017-10-19 | 2018-02-02 | 武汉倍诺德开关股份有限公司 | A kind of electric railway disconnecting switch |
| CN113990636A (en) * | 2021-09-22 | 2022-01-28 | 吴冬枚 | Energy-saving transformer with automatic overload protection function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115332006B (en) | 2023-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105490199B (en) | Withdrawable air insulation ring main unit | |
| JP3727071B2 (en) | Circuit breaker for disconnecting electrical equipment from the electrical network | |
| CN107731619A (en) | A kind of High aititude indoor HVAC combined vacuum breaker | |
| CN103219666A (en) | Modular solid insulation ring network cabinet | |
| CN105680255B (en) | A kind of switch socket and wiring board with circuit protection function | |
| CN107275163B (en) | Circuit breaker and power distribution system | |
| CN104183434A (en) | Electric-leakage circuit breaker with reverse-wiring structure | |
| CN104051180A (en) | 10kV pole-mounted vacuum load switch | |
| CN111785564B (en) | Novel protection type permanent magnetism vacuum circuit breaker | |
| CN103489696A (en) | 10kV box type double-break vacuum circuit beaker of built-in disconnector structure | |
| CN115332006A (en) | Arc extinguishing device of direct current isolating switch in cabinet | |
| CN109659844B (en) | Constant-pressure airtight permanent magnet breaker cabinet | |
| CN207233645U (en) | There is fast trip with being grounded the load-break switch of latch-up protection | |
| CN218274402U (en) | Neutral point single-grounding isolating switch of 500kV main transformer | |
| CN104143464B (en) | Earthed switch assembly unit and high-speed grounding switch thereof | |
| CN203491181U (en) | 10kV box-type double-break vacuum circuit breaker structure with built-in isolation switch | |
| CN205723423U (en) | A kind of Mobile vacuum load switch and fuse combined electric apparatus | |
| CN202259117U (en) | Outdoor AC high-voltage drop type fuse | |
| CN102543558B (en) | Vacuum switch module for looped network cabinet | |
| CN206250657U (en) | A kind of oil-immersed and high-voltage motor switch case | |
| CN207353154U (en) | A kind of High aititude indoor HVAC combined vacuum breaker | |
| CN114884018A (en) | Emergency protection circuit device utilizing Hall sensing time-division dual-purpose motor | |
| CN208142070U (en) | Cutter closing device for preventing misoperation of cable distribution box | |
| CN208723432U (en) | A kind of packet type switch electric appliance | |
| CN202564094U (en) | Interlocking device used for high-voltage power distribution device |
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 |