CN112803249B - High security switch board - Google Patents
High security switch board Download PDFInfo
- Publication number
- CN112803249B CN112803249B CN202011625131.0A CN202011625131A CN112803249B CN 112803249 B CN112803249 B CN 112803249B CN 202011625131 A CN202011625131 A CN 202011625131A CN 112803249 B CN112803249 B CN 112803249B
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- CN
- China
- Prior art keywords
- cavity
- side wall
- power distribution
- distribution cabinet
- groove
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
- H01H9/226—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts the casing containing electrical equipment other than and operated by the switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/38—Hinged covers or doors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses a high-safety power distribution cabinet which comprises a power distribution cabinet body, wherein an element groove and a circuit groove are formed in the power distribution cabinet body, a plurality of through holes penetrating through the element groove are formed in the circuit groove, a plurality of component plates are fixedly connected to the side wall of the element groove, a triggering device is arranged in each component plate, a storage plate is arranged above the power distribution cabinet body, a cavity is formed in the storage plate, a fire fighting device is arranged in the cavity, a trigger is arranged at the bottom of the storage plate, and a linkage device is arranged in the trigger. According to the invention, the assembly plate is arranged in the power distribution cabinet, the sealing tube is arranged in the assembly plate, the contact is contacted with the metal conductive column when a fire disaster occurs, the buzzer alarms, and gas enters the dry powder in the cavity under the action of the main induction line, the electromagnetic layer, the magnetic plate and the sealing block, so that a large amount of dry powder is discharged from the nozzle to extinguish the fire of the element, a larger accident is avoided, and in the closing process, an operator is positioned on the outer side wall of the protective door at any time, so that the operator is prevented from being hurt in the closing process.
Description
Technical Field
The invention relates to the technical field of power distribution cabinets, in particular to a high-safety power distribution cabinet.
Background
The power distribution cabinet transfer power distribution cabinet, the illumination power distribution cabinet and the metering cabinet are the final-stage equipment of the power distribution system; the power distribution cabinet is a generic name of a motor control center, and is used in occasions with scattered load and fewer loops; the motor control center is used for occasions with concentrated load and more loops. They distribute the power of a circuit of the upper-level distribution equipment to nearby loads. This class of equipment should provide protection, monitoring and control of the load; the supply of electric power plays a very important role in the normal operation of the production and work of society. The traditional low-voltage distribution control mode mainly realizes the functions of distribution, control, protection, monitoring and the like through a low-voltage switch control cabinet formed by combining a breaker, a contactor, a thermal relay, a fuse, a control relay, various mutual inductors and various electrical instruments (an ammeter, a voltmeter, a power meter, an electric energy meter and the like).
The accessory cabinet is often required to be switched on to the high-voltage circuit in the use process, breakdown current is often produced at the moment of switching on the high-voltage circuit, workers are extremely easy to be hit by the circuit due to misoperation during switching on operation, accidents are caused, the existing accessory cabinet cannot be timely perceived when short-circuit fire occurs in daily use, and fire spread is easy to occur, and therefore, the high-safety power distribution cabinet is provided, and can effectively alarm and timely treat the fire
Disclosure of Invention
The invention aims to solve the problems that the existing accessory cabinet needs to be switched on to a high-voltage circuit frequently in the use process, breakdown current is often generated at the moment of switching on the high-voltage circuit, accidents are easily caused by the fact that workers are hit by the circuit due to misoperation when switching on the high-voltage circuit, the existing accessory cabinet cannot be timely perceived when short-circuit fire occurs in daily use, and fire spread is easily caused.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a high security switch board, includes the switch board body, component groove and circuit groove have been seted up in the switch board body, the through-hole that runs through to the component groove has been seted up to the circuit groove, a plurality of component boards of component groove lateral wall fixedly connected with, trigger device has been seted up in the component board, switch board body top is provided with the storage board, the cavity has been seted up in the storage board, be provided with fire control unit in the cavity, the storage board bottom is provided with the trigger, be provided with aggregate unit in the trigger, component groove lateral wall is provided with the floodgate seat, be provided with a plurality of switch-on brake handles on the floodgate seat, switch board body lateral wall has the guard gate through hinged joint, be provided with control assembly on the guard gate.
Preferably, the triggering device comprises a triggering groove formed in the bottom of the assembly plate, a metal conductive column is arranged in the triggering groove, a sealing tube is fixedly connected to the bottom of the assembly plate, a sealing piston is slidably connected to the inner side wall of the sealing tube, the sealing piston is connected with a contact column through a connecting rod, a contact chute matched with the contact column is formed in the metal conductive column, a buzzer is connected to one side of the metal conductive column through a connecting wire, and the other end of the metal conductive column is connected with a main induction wire through a conducting wire.
Preferably, the linkage device comprises a linkage cavity arranged in the trigger, an electromagnetic layer is arranged at the bottom of the linkage cavity and connected with a main induction line, a magnetic plate magnetically attracted with the electromagnetic layer is arranged in the linkage cavity, a horizontal channel is arranged in the storage plate, an air port penetrating into the cavity is arranged at the top of the horizontal channel, and a sealing block matched with the air port is connected with the magnetic plate through a vertical rod.
Preferably, the fire fighting device comprises an air bag layer arranged at the top of the storage plate, a plurality of air passages communicated with the horizontal channels are formed in the air bag layer, a plurality of nozzles are formed in the inner side wall of the element groove, and the nozzles are communicated with the cavity through a conveying port penetrating through the side wall of the power distribution cabinet body.
Preferably, the control assembly comprises two triangular blocks which are fixedly connected to the side wall of the protective door and are arranged oppositely, two sliding grooves penetrating through the side wall are formed in the protective door, a vertical shaft is fixedly connected in the sliding grooves, a connecting block is sleeved on the outer side wall of the vertical shaft and is in sliding connection with the sliding grooves, and the connecting block is connected with the side wall of the sliding grooves through a return spring sleeved on the vertical shaft.
Preferably, the connecting block lateral wall fixedly connected with fixed column, fixed column sliding connection has the movable block, the movable block lateral wall is the slope setting, rotate on the movable block and be connected with the connecting axle, the equal fixedly connected with side lever in connecting axle both sides, two the side lever rotates and is connected with same pull rod.
Preferably, a moving cavity is formed in the moving block, the inner side wall of the moving cavity is connected with the limiting block through a collision spring, and the fixed column penetrates through the side wall of the moving block to extend into the moving cavity and is fixedly connected with the limiting block.
Preferably, the two connecting blocks are connected with a connecting plate together, and the side wall of the connecting plate is fixedly connected with a rectangular pull ring.
Preferably, the side wall of the switch-on handle is provided with a pull opening which is arranged in a V shape.
Compared with the prior art, the invention has the beneficial effects that:
1. through being provided with the block board in the switch board, be provided with the sealed tube in the block board, can make contact and metal conductive column contact when the conflagration takes place for buzzer alarm makes gas enter into dry powder department in the cavity under the effect of main induction line, electromagnetic layer, magnetic plate and sealing block for the spout is put out a large amount of dry powder discharges and puts out a fire to the component, avoids causing bigger accident.
2. Through operating the rectangle pull ring outside the guard gate, make pull rod and switch on the brake lever contact under connecting block, fixed column, movable block and side lever's effect to drive switch on the brake lever and switch on, in the closing process, operating personnel are in guard gate lateral wall constantly, thereby guarantee can not cause the injury to operating personnel when switching on.
Drawings
Fig. 1 is a schematic structural diagram of a high-safety power distribution cabinet according to the present invention;
FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;
FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1;
fig. 4 is a schematic structural diagram of a control assembly in a high-safety power distribution cabinet according to the present invention.
In the figure: the power distribution cabinet comprises a power distribution cabinet body, a 2-element groove, a 3-circuit groove, a 4-component plate, a 5-storage plate, a 6-cavity, a 7-trigger, an 8-gate seat, a 9-switch-on gate handle, a 10-protection gate, a 11-metal conductive column, a 12-sealing tube, a 13-sealing piston, a 14-contact column, a 15-buzzer, a 16-main induction wire, a 17-electromagnetic layer, a 18-magnetic plate, a 19-horizontal channel, a 20-sealing block, a 21-airbag layer, a 22-nozzle, a 23-air channel, a 24-triangular block, a 25-vertical shaft, a 26-connecting block, a 27-fixing column, a 28-moving block, a 29-side rod, a 30-pull rod, a 31-limiting block and a 32-rectangular pull ring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-4, a high security switch board, including switch board body 1, element groove 2 and circuit groove 3 have been seted up in the switch board body 1, set up the component with the circuit separately, guarantee the safety of equipment, avoid the circuit to be mixed and disorderly, the circuit groove 3 has been seted up a plurality of through-holes that run through to element groove 2, element groove 2 lateral wall fixedly connected with a plurality of component boards 4, trigger device has been seted up in the component board 4, further, trigger device is including the trigger groove of seting up in the component board 4 bottom, be provided with metal conductive post 11 in the trigger groove, component board 4 bottom fixedly connected with seal tube 12, be provided with the easy inflation gas in the seal tube 12, seal tube 12 inside wall sliding connection has seal piston 13, seal piston 13 is connected with contact post 14 through the connecting rod, contact post 14 is connected with the power through the power cord, metal conductive post 11 one end is insulating material, the other end is provided with conductive material, can energize when contact post 14 contacts conductive material, the contact spout with contact post 14 looks adaptation is seted up on the metal conductive post 11, further, metal post 11 one side is provided with through connecting wire and is connected with buzzer 15, the other end is connected with main wire 16 through the wire.
The switch board body 1 top is provided with the storage board 5, has seted up cavity 6 in the storage board 5, is provided with dry powder extinguishing material in the cavity 6, is provided with fire control unit in the cavity 6, and further, fire control unit is including setting up the gasbag layer 21 at the storage board 5 top, has seted up a plurality of air flue 23 that are linked together with horizontal channel 19 on the gasbag layer 21, and a plurality of spouts 22 have been seted up to component groove 2 inside wall, and a plurality of spouts 22 are through same delivery port and the cavity 6 intercommunication that runs through the switch board body 1 lateral wall, and spout 22 can blow out the dry powder, covers the device that catches fire.
The bottom of the storage plate 5 is provided with a trigger 7, a linkage device is arranged in the trigger 7, further, the linkage device comprises a linkage cavity formed in the trigger 7, an electromagnetic layer 17 is arranged at the bottom of the linkage cavity, the electromagnetic layer 17 is connected with a main induction wire 16, a magnetic plate 18 magnetically attracted with the electromagnetic layer 17 is arranged in the linkage cavity, a horizontal channel 19 is formed in the storage plate 5, an air port penetrating into the cavity 6 is formed in the top of the horizontal channel 19, and the magnetic plate 18 is connected with a sealing block 20 matched with the air port through a vertical rod.
The side wall of the element groove 2 is provided with a gate seat 8, the gate seat 8 is provided with a plurality of switch-on gate handles 9, and the side wall of the switch-on gate handle 9 is provided with a V-shaped pull opening; the side wall of the power distribution cabinet body 1 is connected with a protective door 10 through a hinge, and a control assembly is arranged on the protective door 10; further, the control assembly comprises two triangular blocks 24 which are fixedly connected to the side wall of the protective door 10 and are oppositely arranged, two sliding grooves penetrating through the side wall are formed in the protective door 10, a vertical shaft 25 is fixedly connected in the sliding grooves, a connecting block 26 is sleeved on the outer side wall of the vertical shaft 25, the connecting block 26 is in sliding connection with the sliding grooves, and the connecting block 26 is connected with the side wall of the sliding grooves through a return spring sleeved on the vertical shaft 25.
Still further, connecting block 26 lateral wall fixedly connected with fixed column 27, fixed column 27 sliding connection has movable block 28, the movable block 28 lateral wall is the slope setting, rotate on the movable block 28 and be connected with the connecting axle, the equal fixedly connected with side lever 29 of connecting axle both sides, two side levers 29 rotate and are connected with same pull rod 30, the removal chamber has been seted up in the movable block 28, the removal intracavity lateral wall has restriction piece 31 through contradicting spring coupling, fixed column 27 runs through movable block 28 lateral wall and extends to the removal intracavity, and with restriction piece 31 fixed connection, two connecting blocks 26 are connected with the connecting plate jointly, connecting plate lateral wall fixedly connected with rectangle pull ring 32.
When fire disaster occurs to the elements due to short-circuit overheat, the gas in the sealing tube 12 expands under the flame temperature, so that the sealing piston 13 in the sealing tube 12 moves, the contact column 14 moves when the sealing piston 13 moves, the contact column 14 moves to the metal conductive column 11, a power supply connected with the contact column transmits current to the metal conductive column 11, a buzzer 15 connected with the metal conductive column 11 through a connecting wire alarms, an electromagnetic layer 17 connected with a main induction wire 16 receives electricity, magnetic force is generated, a sealing block 20 connected with a magnetic plate 18 through a vertical rod moves downwards under the action of the magnetic force, gas in an air bag layer 21 enters a cavity 6, dry powder in the cavity 6 is mixed with the gas and discharged outwards from a conveying port under the blowing of the gas, and is sprayed out from a nozzle 22 on a power distribution cabinet body 1 to cover a device on fire, so that larger accidents are avoided;
when a worker closes the switch, the rectangular pull ring 32 is pulled, the connecting block 26 moves upwards, the moving block 28 connected with the connecting block 26 through the fixing column collides with the triangle 24 in the upward moving process, so that the moving block 28 is far away from the protective door 10 relatively, the pull rod 30 connected with the side rod 29 on the moving block 28 moves towards the switch seat 8, the pull rod 30 connected in a rotating manner moves to the other side of the switch-on handle 9 when continuously moving, the pull rod 30 slides to the pull opening position on the switch-on handle 9, at the moment, the moving block 28 is driven to move downwards by the downward moving rectangular pull ring 32, the switch-on handle 9 is pulled downwards under the action of the pull force of the pull rod 30 when the moving block 28 moves downwards, the switch-on handle 9 is communicated with the switch seat 8 at the bottom, after the switch-on is completed, the pull rod 30 is automatically separated from the pull opening on the switch-on handle 9, and an operator is located on the outer side wall of the protective door at the moment, so that no harm is caused to the operator in the switch-on process.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides a high security switch board, includes switch board body (1), its characterized in that, element groove (2) and circuit groove (3) have been seted up in switch board body (1), circuit groove (3) have been seted up a plurality of through-holes that run through to element groove (2), element groove (2) lateral wall fixedly connected with a plurality of component boards (4), trigger device has been seted up in component board (4), switch board body (1) top is provided with storage board (5), cavity (6) have been seted up in storage board (5), be provided with fire control unit in cavity (6), storage board (5) bottom is provided with trigger (7), be provided with aggregate unit in trigger (7), element groove (2) lateral wall is provided with floodgate seat (8), be provided with a plurality of switch-on brake handles (9) on floodgate seat (8), switch board (1) lateral wall is through hinged joint having protection door (10), be provided with control assembly on protection door (10);
the triggering device comprises a triggering groove formed in the bottom of a component plate (4), a metal conductive column (11) is arranged in the triggering groove, a sealing tube (12) is fixedly connected to the bottom of the component plate (4), a sealing piston (13) is slidably connected to the inner side wall of the sealing tube (12), the sealing piston (13) is connected with a contact column (14) through a connecting rod, a contact sliding groove matched with the contact column (14) is formed in the metal conductive column (11), a buzzer (15) is connected to one side of the metal conductive column (11) through a connecting wire, and a main induction wire (16) is connected to the other end of the metal conductive column through a conducting wire;
the linkage device comprises a linkage cavity which is arranged in the trigger (7), an electromagnetic layer (17) is arranged at the bottom of the linkage cavity, the electromagnetic layer (17) is connected with a main induction wire (16), a magnetic plate (18) which is magnetically attracted with the electromagnetic layer (17) is arranged in the linkage cavity, a horizontal channel (19) is arranged in the storage plate (5), an air port which penetrates into the cavity (6) is formed in the top of the horizontal channel (19), and a sealing block (20) which is matched with the air port is connected with the magnetic plate (18) through a vertical rod;
the fire fighting device comprises an air bag layer (21) arranged at the top of a storage plate (5), a plurality of air passages (23) communicated with a horizontal channel (19) are formed in the air bag layer (21), a plurality of nozzles (22) are formed in the inner side wall of the element groove (2), and the nozzles (22) are communicated with the cavity (6) through a conveying port which penetrates through the side wall of the power distribution cabinet body (1).
2. The high-safety power distribution cabinet according to claim 1, wherein the control assembly comprises two triangular blocks (24) which are fixedly connected to the side wall of the protective door (10) and are oppositely arranged, two sliding grooves penetrating through the side wall are formed in the protective door (10), vertical shafts (25) are fixedly connected in the sliding grooves, connecting blocks (26) are sleeved on the outer side walls of the vertical shafts (25), the connecting blocks (26) are in sliding connection with the sliding grooves, and the connecting blocks (26) are connected with the side walls of the sliding grooves through restoring springs sleeved on the vertical shafts (25).
3. The high-safety power distribution cabinet according to claim 2, wherein the side walls of the connecting blocks (26) are fixedly connected with fixed columns (27), the fixed columns (27) are slidably connected with moving blocks (28), the side walls of the moving blocks (28) are obliquely arranged, connecting shafts are rotatably connected to the moving blocks (28), side rods (29) are fixedly connected to two sides of each connecting shaft, and two side rods (29) are rotatably connected with the same pull rod (30).
4. A high security switch board according to claim 3, characterized in that, the movable block (28) is internally provided with a movable cavity, the inner side wall of the movable cavity is connected with a limiting block (31) through a collision spring, and the fixed column (27) extends into the movable cavity through the side wall of the movable block (28) and is fixedly connected with the limiting block (31).
5. The high-safety power distribution cabinet according to claim 4, wherein two connecting blocks (26) are commonly connected with a connecting plate, and a rectangular pull ring (32) is fixedly connected to the side wall of the connecting plate.
6. The high-safety power distribution cabinet according to claim 1, wherein the side wall of the switch-on handle (9) is provided with a pull opening arranged in a V shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011625131.0A CN112803249B (en) | 2020-12-31 | 2020-12-31 | High security switch board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011625131.0A CN112803249B (en) | 2020-12-31 | 2020-12-31 | High security switch board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112803249A CN112803249A (en) | 2021-05-14 |
| CN112803249B true CN112803249B (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011625131.0A Active CN112803249B (en) | 2020-12-31 | 2020-12-31 | High security switch board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112803249B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612121B (en) * | 2021-09-08 | 2024-03-22 | 广东电网有限责任公司 | Power distribution cabinet with automatic fire extinguishing device |
| CN115779307B (en) * | 2022-12-14 | 2023-12-15 | 浙江宝威电气有限公司 | Sealed fire-extinguishing transformer |
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| CN111313266A (en) * | 2020-04-10 | 2020-06-19 | 初行电力科技(江苏)有限公司 | Switch board that safety protection effect is good |
| CN112072494A (en) * | 2020-09-14 | 2020-12-11 | 宁波立项电子有限公司 | Power distribution cabinet capable of automatically replacing standby circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090044039A (en) * | 2007-10-31 | 2009-05-07 | 한국도로공사 | Hydrant box for a road tunnel |
| CN101662127A (en) * | 2009-08-27 | 2010-03-03 | 北京双杰电气股份有限公司 | Five-prevention interlocking device |
| CN102088166A (en) * | 2010-12-14 | 2011-06-08 | 银河电气科技有限公司 | Shell of box-type substation |
| CN104021953A (en) * | 2014-06-23 | 2014-09-03 | 国家电网公司 | Switching-on lever for low-voltage switch |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112803249A (en) | 2021-05-14 |
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