CN212626825U - Handcart type direct current breaker switch cabinet - Google Patents
Handcart type direct current breaker switch cabinet Download PDFInfo
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- CN212626825U CN212626825U CN202020707035.XU CN202020707035U CN212626825U CN 212626825 U CN212626825 U CN 212626825U CN 202020707035 U CN202020707035 U CN 202020707035U CN 212626825 U CN212626825 U CN 212626825U
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Abstract
The utility model discloses a handcart type direct current breaker switch cabinet, which comprises a first cabinet body and a second cabinet body, wherein the middle splicing part of the first cabinet body and the second cabinet body is fastened and connected through bolts; the first cabinet body comprises a bus chamber, a cable chamber, a handcart chamber and a first low-pressure chamber, the bus chamber is arranged at the rear upper part of the first cabinet body, and the cable chamber is arranged at the rear lower part of the first cabinet body 1; the first low-pressure chamber and the handcart chamber are arranged in the front of the first cabinet body in an up-down layered manner; the second cabinet body comprises a power electronic valve group chamber and a second low-pressure chamber, the second low-pressure chamber is arranged at the front upper part of the second cabinet body, and the power electronic valve group chamber is arranged at the rear lower part of the second cabinet body. The two-sided cabinet of the utility model is formed by splicing bolts, is convenient to process, install and disassemble, and has higher production efficiency; different functional module assemblies are arranged in different compartments, and the compartments are relatively independent, so that the installation and the maintenance are convenient.
Description
Technical Field
The utility model relates to a direct current breaker technical field, concretely relates to handcart-type direct current breaker cubical switchboard.
Background
With the great development and wide application of new energy, new materials, information technologies and power electronic technologies, the requirements of users on power consumption demand, power quality, power supply reliability and the like are continuously improved. Research data at home and abroad shows that the direct-current-based power distribution network has better performance than alternating current in the aspects of transmission capacity, controllability, power supply quality improvement and the like, can effectively improve the power quality, reduce the use of a power electronic converter, reduce the power loss and the operation cost, coordinate contradictions between a large power grid and a distributed power supply, and fully exert the value and benefit of distributed energy. As a key component of the dc distribution network, the dc circuit breaker plays important roles in closing, carrying, and breaking current under normal loop conditions, converting system operation modes, and cutting off fault current to protect the system, and is one of important devices for building the dc distribution network.
According to the use requirement of a direct-current power distribution network, the direct-current circuit breaker needs to have the characteristics of small occupied area, convenience in overhauling and maintenance, high safety and the like. The existing direct current breaker switch cabinet for the direct current distribution network has the problems of large cabinet body size, low production efficiency, low integration level and scale, inconvenience in maintenance, insufficient safety protection measures for operators and the cabinet body and the like.
SUMMERY OF THE UTILITY MODEL
For solving not enough among the prior art, the utility model provides a handcart-type direct current breaker switch cabinet has solved that current direct current breaker switch cabinet is bulky, production efficiency is low, integrated and the modularization degree is not high, overhaul and maintain inconvenient problem.
In order to realize the above object, the utility model adopts the following technical scheme: a handcart type direct current breaker switch cabinet comprises a first cabinet body and a second cabinet body, wherein the middle splicing part of the first cabinet body and the second cabinet body is fixedly connected through a bolt;
the first cabinet body comprises a bus chamber, a cable chamber, a handcart chamber and a first low-pressure chamber, the bus chamber is arranged at the rear upper part of the first cabinet body, and the cable chamber is arranged at the rear lower part of the first cabinet body; the first low-pressure chamber and the handcart chamber are arranged in the front of the first cabinet body in an up-down layered manner;
the second cabinet body comprises a power electronic valve group chamber and a second low-pressure chamber, the second low-pressure chamber is arranged at the front upper part of the second cabinet body, and the power electronic valve group chamber is arranged at the rear lower part of the second cabinet body.
Furthermore, the bus chamber comprises an incoming line busbar and an upper isolating switch which are positioned at the upper part of the bus chamber, the cable chamber comprises a grounding switch, a lower isolating switch and an outgoing line cable which are positioned on a cross beam at the rear side of the cable chamber, and the handcart chamber comprises a handcart, a mechanical switch and a mechanical switch trigger circuit which are positioned on the handcart; the incoming busbar penetrates through the first cabinet body and the second cabinet body and is fixed by an insulator; the outgoing cable is led out from the opening at the bottom of the cable chamber; the mechanical switch and the mechanical switch trigger circuit are arranged at the lower part of the handcart room;
the incoming line busbar is connected with the upper isolating switch through a copper bar, the lower isolating switch is connected with the outgoing line cable, and the mechanical switch is connected with the lower isolating switch.
Furthermore, the power electronic valve bank room comprises a main branch valve bank, a transfer branch valve bank, an energy consumption branch lightning arrester, an air duct and a cooling fan; the cooling fan is arranged on the top plate of the second cabinet body, and the air channel is respectively connected with the main branch valve group and the cooling fan; the main branch valve group is arranged on a supporting piece on the side wall of the second cabinet body through a bottom C-shaped insulating beam;
the transfer branch valve bank and the energy consumption branch lightning arrester are jointly installed on a bottom plate, the lower portion of the bottom plate is supported by a post insulator, the insulator is installed on a trolley frame at the bottom of the second cabinet body, and a pulley is installed at the lower portion of the trolley frame and matched with a guide rail at the bottom of the cabinet body;
the second low-voltage chamber comprises a control protection device which controls the on-off of power electronic devices of the main branch valve bank and the transfer branch valve bank through optical fibers;
the main branch valve bank is connected with the mechanical switch to form a main branch, the transfer branch valve bank is connected with the energy consumption branch lightning arrester in parallel to form a transfer energy consumption branch, one end of the main branch, which is connected with the transfer energy consumption branch in parallel, is connected with one end of the upper isolating switch, the other end of the main branch, which is connected with the transfer energy consumption branch in parallel, is connected with the lower isolating switch, and the other end of the main branch, which is connected with the transfer energy consumption branch in parallel, is simultaneously.
Furthermore, the handcart room pressure relief device further comprises a cable room pressure relief channel, a bus room pressure relief channel, a handcart room pressure relief channel and a power electronic valve group room pressure relief channel which are respectively formed by a sheet metal part sealing plate corresponding to the room and a pressure relief cover plate at the top of the cabinet body.
Further, still include hoisting machine and construct, including first horizontal hoisting board, second horizontal hoisting board, first vertical hoisting board, second vertical hoisting board, third vertical hoisting board, fourth vertical hoisting board. The first transverse hoisting plate and the second transverse hoisting plate are of symmetrical structures and are connected and installed at the top of the cabinet body through bolts; two ends of the first longitudinal hoisting plate, the second longitudinal hoisting plate, the third longitudinal hoisting plate and the fourth longitudinal hoisting plate are respectively fixed between the first transverse hoisting plate and the second transverse hoisting plate through bolt connection; the first longitudinal hoisting plate and the second longitudinal hoisting plate are respectively arranged at the top of the first cabinet body, and the third longitudinal hoisting plate and the fourth longitudinal hoisting plate are respectively arranged at the top of the second cabinet body.
Furthermore, when in a normal through-flow mode, the upper isolating switch, the main branch valve bank, the quick mechanical switch and the lower isolating switch are closed, the transfer branch valve bank is disconnected, and current flows through the upper isolating switch, the main branch valve bank, the quick mechanical switch and the lower isolating switch from the incoming busbar and then flows out of the circuit breaker switch cabinet through the outgoing cable.
Furthermore, in the current conversion mode, the transfer branch valve bank is closed, the main branch valve bank is disconnected, current gradually flows from the main branch valve bank to the transfer branch valve bank, a current path sequentially comprises an incoming busbar, an upper isolating switch, the transfer branch valve bank, a lower isolating switch and an outgoing cable, and when the current of the main branch valve bank is reduced to 0, the arc-free breaking quick mechanical switch is opened.
Further, in the energy consumption mode, when the quick mechanical switch is disconnected to a rated opening distance, the transfer branch valve group is disconnected, the current is transferred to the energy consumption branch lightning arrester until the current in the line is exhausted, and the current path sequentially comprises an incoming busbar, an upper isolating switch, the energy consumption branch lightning arrester, a lower isolating switch and an outgoing cable.
The utility model discloses the beneficial effect who reaches:
(1) the handcart type direct current breaker switch cabinet is formed by splicing two cabinets through bolts, and compared with a welding cabinet body, the handcart type direct current breaker switch cabinet is more convenient to process, install and disassemble and has higher production efficiency;
(2) the utility model discloses handcart-type direct current breaker cubical switchboard arranges different functional module subassemblies among the compartment of difference, and each room is relatively independent, is convenient for install and overhaul, and the high-pressure chamber (generating line room, cable chamber, handcart room, power electronic valves room) all has independent pressure release passageway, flushes apron release pressure and exhaust gas easily when taking place electric arc fault to ensure the safety of operating personnel and cubical switchboard.
(3) The utility model discloses an on the handcart is integrated to quick mechanical switch, the trigger circuit among the direct current circuit breaker, constitute direct current circuit breaker handcart room, compact structure, be convenient for installation and maintenance.
(4) The utility model arranges the main branch valve group, the transfer branch valve group and the energy consumption branch lightning arrester in the DC breaker switch cabinet in the same room, has compact structure and convenient copper bar connection, wherein the main branch valve group is arranged at the upper part of the cabinet body, and the cooling fan at the top of the cabinet body directly discharges the heat loss of the valve group out of the cabinet through the vertically arranged air channel, thus having higher heat dissipation efficiency; the transfer branch valve group and the energy-consumption branch lightning arrester unit are installed on the same bottom plate, the lower portion of the bottom plate is installed on the trolley frame through an insulator, the lower portion of the trolley frame is provided with a pulley matched with a guide rail at the bottom of the cabinet body, the structure is very compact, the modularization degree is high, and the installation and the maintenance of the valve group are facilitated.
(6) The utility model discloses handcart-type direct current breaker cubical switchboard's hoisting machine constructs for the sheet metal component of cabinet body top installation shaped hoisting plate of bending, has both satisfied the hoist and mount requirement of the cabinet body, plays the effect of strengthening cabinet body intensity again.
Drawings
Fig. 1 is a diagram of a dc breaker switchgear according to an embodiment of the present invention;
fig. 2 is a right side view of the first cabinet 1 and a left side view of the second cabinet 2 according to the embodiment of the present invention;
FIG. 3 is a top plan view of the top cover plate of each high pressure chamber pressure relief passage in an embodiment of the present invention;
FIG. 4 is a structural diagram of a hoisting mechanism according to an embodiment of the present invention;
fig. 5 is a right side view of the internal structure of the first cabinet and a left side view of the internal structure of the second cabinet in the embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1:
as shown in fig. 1, a handcart type direct current breaker switch cabinet comprises a first cabinet body 1 and a second cabinet body 2, wherein the cabinet body 1 and the cabinet body 2 are fixedly connected at the middle splicing position through bolts,
as shown in fig. 2, the first cabinet 1 includes a bus bar room 11, a cable room 12, a handcart room 13, and a first low-pressure room 14, wherein the bus bar room 11 and the cable room 12 are arranged at the rear of the first cabinet 1, the bus bar room 11 is at the upper part of the cabinet 1, and the cable room 12 is at the lower part of the cabinet 1; the first low-pressure chamber 14 and the handcart chamber 13 are arranged in the front part of the cabinet body 1 in an up-down layered mode, and all the chambers are separated through sheet metal component closing plates.
The bus chamber is used for arranging a direct current bus, and the direct current bus penetrates through the upper parts of the first cabinet body 1 and the second cabinet body 2;
the cable chamber is used for connecting outgoing cables, and the space is large;
the handcart room is used for arranging a quick mechanical switch handcart.
The low-pressure chamber is used for secondary equipment wiring.
The second cabinet 2 comprises a power electronic valve group chamber 21 and a second low-pressure chamber 22, wherein the second low-pressure chamber 22 is arranged at the front upper position of the cabinet 2, and the power electronic valve group chamber 21 is arranged at the rear lower position of the second cabinet 2;
as shown in fig. 3, the high-pressure chamber (bus bar chamber, cable chamber, handcart chamber, and power electronic valve group chamber) has an individual pressure relief channel, and the channel is composed of a sheet metal sealing plate of each chamber and a pressure relief cover plate at the top of the cabinet body, and includes a cable chamber pressure relief channel 121, a bus bar chamber pressure relief channel 111, a handcart chamber pressure relief channel 131, and a power electronic valve group chamber pressure relief channel 211.
As shown in fig. 4, the hoisting mechanism is further included, and comprises a first transverse hoisting plate 3, a second transverse hoisting plate 4, a first longitudinal hoisting plate 15, a second longitudinal hoisting plate 16, a third longitudinal hoisting plate 23 and a fourth longitudinal hoisting plate 24. The first transverse hoisting plate 3 and the second transverse hoisting plate 4 are of symmetrical structures and are connected and installed at the top of the cabinet body through bolts; two ends of the first longitudinal hoisting plate 15, the second longitudinal hoisting plate 16, the third longitudinal hoisting plate 23 and the fourth longitudinal hoisting plate 24 are respectively fixed between the first transverse hoisting plate 3 and the second transverse hoisting plate 4 through bolt connection; the first longitudinal hoisting plate 15 and the second longitudinal hoisting plate 16 are respectively arranged at the top of the first cabinet body 1, and the third longitudinal hoisting plate 23 and the fourth longitudinal hoisting plate 24 are respectively arranged at the top of the second cabinet body 2.
Referring to fig. 5, the bus bar room 11 of the present embodiment includes an incoming bus bar 112 and an upper isolating switch 113, the cable room 12 includes a grounding switch 122, a lower isolating switch 123 and an outgoing cable 124, and the handcart room 13 includes a fast mechanical switch 132 and a mechanical switch triggering circuit 133. The incoming busbar 112 is arranged at the upper part of the busbar chamber 11, penetrates through the first cabinet body 1 and the second cabinet body 2, and is fixed at the top of the cabinet bodies through insulators; the upper disconnecting switch 113 and the lower disconnecting switch 123 are arranged in the first cabinet 1 in an upper-lower layer, wherein the upper disconnecting switch 113 is arranged in the bus bar room, and the lower disconnecting switch 123 is arranged in the cable room; the ground switch 122 is disposed on the rear side cross member of the cable compartment 12; the outgoing cable 124 is led out from the opening at the bottom of the cable chamber 12; the quick mechanical switch 132 and the mechanical switch triggering circuit 133 are disposed in the lower portion of the hand truck compartment 13.
The mechanical switch trigger circuit is used for triggering the on-off of the mechanical switch;
the power electronic valve group room 21 comprises a main branch valve group 212, a transfer branch valve group 213, an energy consumption branch lightning arrester 214, an air duct 216 and a cooling fan 217; the low-pressure chamber 22 comprises a control and protection device 221. The main branch valve set 212, the air duct 216 and the cooling fan 217 are arranged at the upper part of the power electronic valve set chamber 21, the main branch valve set 212 is mounted on a support member on the side wall of the second cabinet body 2 through two C-shaped insulating beams at the bottom, the cooling fan 217 is mounted on the top plate of the second cabinet body 2, and the air duct 216 is respectively connected with the main branch valve set 212 and the cooling fan 217; the transfer branch valve bank 213 and the energy consumption branch arrester 214 are arranged at the lower part of the power electronic valve bank room 21, the transfer branch valve bank 213 and the energy consumption branch arrester 214 are jointly installed on a bottom plate, the lower part of the bottom plate is supported by a post insulator, the insulator is installed on a trolley frame at the bottom of the second cabinet body 2, and the lower part of the trolley frame is provided with a pulley matched with a guide rail at the bottom of the cabinet body.
The main branch valve set 212 is used for conducting normal current of the power system in a normal through-flow mode of the direct-current circuit breaker, and when a fault occurs, the power electronic device of the main branch valve set is locked to force the current to be transferred to the transfer branch valve set.
The transfer branch valve set 213 is used for switching on the power electronic device in the commutation mode to transfer the fault current from the main branch valve set to the transfer branch valve set, and then the transfer branch power electronic device is locked to transfer the fault current to the energy consumption branch;
the energy consumption branch arrester 214 is used for consuming energy generated by fault current;
the incoming busbar 112 is connected with one end of the upper isolating switch 113 through a copper bar, the main branch valve group 212 is connected with the mechanical switch 132 to form a main branch, the transfer branch valve group 213 is connected with the energy-consuming branch arrester 214 in parallel to form a transfer energy-consuming branch, one end of the main branch connected with the transfer energy-consuming branch in parallel is connected with the other end of the upper isolating switch 113, the other end of the main branch connected with the transfer energy-consuming branch in parallel is connected with the lower isolating switch 123, the other end of the main branch connected with the transfer energy-consuming branch in parallel is simultaneously connected with the grounding switch 122, and the other end of the lower isolating switch 123.
In the normal through-current mode, the upper isolation switch 113, the main branch valve group 212, the fast mechanical switch 132 and the lower isolation switch 123 are closed, the transfer branch valve group 213 is opened, and the current flows from the incoming busbar 112 through the upper isolation switch 113, the main branch valve group 212, the fast mechanical switch 132 and the lower isolation switch 123, and then flows out of the circuit breaker switch cabinet through the outgoing cable 124.
In the commutation mode, the transfer branch valve set 213 is closed, the main branch valve set 212 is opened, the current gradually flows from the main branch valve set 212 to the transfer branch valve set 213, the current path sequentially includes the incoming busbar 112, the upper isolating switch 113, the transfer branch valve set 213, the lower isolating switch 123 and the outgoing cable 124, and when the current of the main branch valve set 212 is reduced to 0, the quick mechanical switch 132 is switched off without an arc.
In the energy consumption mode, when the fast mechanical switch 132 is disconnected to a rated opening distance, the transfer branch valve bank 213 is disconnected, the current is transferred to the energy consumption branch lightning arrester 214 until the current in the line is exhausted, and the current path sequentially comprises the incoming busbar 112, the upper isolating switch 113, the energy consumption branch lightning arrester 214, the lower isolating switch 123 and the outgoing cable 124.
After the circuit breaker switchgear completes the entire breaking process, the upper and lower disconnectors 113 and 123 are opened.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a handcart-type direct current breaker cubical switchboard which characterized in that: the cabinet comprises a first cabinet body and a second cabinet body, wherein the middle splicing part of the first cabinet body and the second cabinet body is fixedly connected through a bolt; the first cabinet body comprises a bus chamber, a cable chamber, a handcart chamber and a first low-pressure chamber, the bus chamber is arranged at the rear upper part of the first cabinet body, and the cable chamber is arranged at the rear lower part of the first cabinet body; the first low-pressure chamber and the handcart chamber are arranged in the front of the first cabinet body in an up-down layered manner; the second cabinet body comprises a power electronic valve group chamber and a second low-pressure chamber, the second low-pressure chamber is arranged at the front upper part of the second cabinet body, and the power electronic valve group chamber is arranged at the rear lower part of the second cabinet body.
2. The handcart type direct current breaker switch cabinet according to claim 1, characterized in that: the bus chamber comprises an incoming line busbar and an upper isolating switch which are positioned at the upper part of the bus chamber, the cable chamber comprises a grounding switch, a lower isolating switch and an outgoing line cable which are positioned on a cross beam at the rear side of the cable chamber, and the handcart chamber comprises a handcart, a mechanical switch and a mechanical switch trigger circuit which are positioned on the handcart; the incoming busbar penetrates through the first cabinet body and the second cabinet body and is fixed by an insulator; the outgoing cable is led out from the opening at the bottom of the cable chamber; the mechanical switch and the mechanical switch trigger circuit are arranged at the lower part of the handcart room; the incoming line busbar is connected with the upper isolating switch through a copper bar, the lower isolating switch is connected with the outgoing line cable, and the mechanical switch is connected with the lower isolating switch.
3. The handcart type direct current breaker switch cabinet according to claim 2, characterized in that: the power electronic valve bank room comprises a main branch valve bank, a transfer branch valve bank, an energy consumption branch lightning arrester, an air duct and a cooling fan; the cooling fan is arranged on the top plate of the second cabinet body, and the air channel is respectively connected with the main branch valve group and the cooling fan; the main branch valve group is arranged on a supporting piece on the side wall of the second cabinet body through a bottom C-shaped insulating beam; the transfer branch valve bank and the energy consumption branch lightning arrester are jointly installed on a bottom plate, the lower portion of the bottom plate is supported by a post insulator, the insulator is installed on a trolley frame at the bottom of the second cabinet body, and a pulley is installed at the lower portion of the trolley frame and matched with a guide rail at the bottom of the cabinet body; the second low-voltage chamber comprises a control protection device which controls the on-off of power electronic devices of the main branch valve bank and the transfer branch valve bank through optical fibers; the main branch valve bank is connected with the mechanical switch to form a main branch, the transfer branch valve bank is connected with the energy consumption branch lightning arrester in parallel to form a transfer energy consumption branch, one end of the main branch, which is connected with the transfer energy consumption branch in parallel, is connected with one end of the upper isolating switch, the other end of the main branch, which is connected with the transfer energy consumption branch in parallel, is connected with the lower isolating switch, and the other end of the main branch, which is connected with the transfer energy consumption branch in parallel, is simultaneously.
4. The handcart type direct current breaker switch cabinet according to claim 1, characterized in that: the handcart room pressure relief channel is characterized by further comprising a cable room pressure relief channel, a bus room pressure relief channel, a handcart room pressure relief channel and a power electronic valve group room pressure relief channel which are respectively formed by a sheet metal part sealing plate corresponding to a room and a pressure relief cover plate at the top of the cabinet body.
5. The handcart type direct current breaker switch cabinet according to claim 1, characterized in that: the hoisting mechanism comprises a first transverse hoisting plate, a second transverse hoisting plate, a first longitudinal hoisting plate, a second longitudinal hoisting plate, a third longitudinal hoisting plate and a fourth longitudinal hoisting plate, wherein the first transverse hoisting plate and the second transverse hoisting plate are of symmetrical structures and are arranged at the top of the cabinet body through bolt connection; two ends of the first longitudinal hoisting plate, the second longitudinal hoisting plate, the third longitudinal hoisting plate and the fourth longitudinal hoisting plate are respectively fixed between the first transverse hoisting plate and the second transverse hoisting plate through bolt connection; the first longitudinal hoisting plate and the second longitudinal hoisting plate are respectively arranged at the top of the first cabinet body, and the third longitudinal hoisting plate and the fourth longitudinal hoisting plate are respectively arranged at the top of the second cabinet body.
6. The handcart type direct current breaker switch cabinet according to claim 3, characterized in that: when the breaker is in a normal through-flow mode, the upper isolating switch, the main branch valve bank, the mechanical switch and the lower isolating switch are closed, the transfer branch valve bank is disconnected, and current flows through the upper isolating switch, the main branch valve bank, the mechanical switch and the lower isolating switch from the incoming busbar and then flows out of the breaker switch cabinet through the outgoing cable.
7. The handcart type direct current breaker switch cabinet according to claim 3, characterized in that: and in the current conversion mode, the transfer branch valve group is closed, the main branch valve group is disconnected, the current gradually flows from the main branch valve group to the transfer branch valve group, the current path sequentially comprises an incoming busbar, an upper isolating switch, the transfer branch valve group, a lower isolating switch and an outgoing cable, and when the current of the main branch valve group is reduced to 0, the mechanical switch is switched off in an arc-free manner.
8. The handcart type direct current breaker switch cabinet according to claim 3, characterized in that: in the energy consumption mode, after the mechanical switch is disconnected to a rated opening distance, the transfer branch valve group is disconnected, current is transferred to the energy consumption branch lightning arrester until the current in a line is exhausted, and a current path sequentially comprises an incoming busbar, an upper isolating switch, the energy consumption branch lightning arrester, a lower isolating switch and an outgoing cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020707035.XU CN212626825U (en) | 2020-04-30 | 2020-04-30 | Handcart type direct current breaker switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020707035.XU CN212626825U (en) | 2020-04-30 | 2020-04-30 | Handcart type direct current breaker switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212626825U true CN212626825U (en) | 2021-02-26 |
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ID=74711862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020707035.XU Active CN212626825U (en) | 2020-04-30 | 2020-04-30 | Handcart type direct current breaker switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212626825U (en) |
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2020
- 2020-04-30 CN CN202020707035.XU patent/CN212626825U/en active Active
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