CN214898297U - Main circuit reversing plug-in, main circuit connecting structure and functional unit - Google Patents
Main circuit reversing plug-in, main circuit connecting structure and functional unit Download PDFInfo
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- CN214898297U CN214898297U CN202121053837.4U CN202121053837U CN214898297U CN 214898297 U CN214898297 U CN 214898297U CN 202121053837 U CN202121053837 U CN 202121053837U CN 214898297 U CN214898297 U CN 214898297U
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Abstract
The utility model relates to a complete sets of switchgear technical field, especially a main circuit switching-over moves plug-in components, main circuit connection structure and functional unit. The main circuit reversing movable plug-in is divided into a plug part positioned on the front side of a movable plug-in mounting plane and a wiring terminal reversing part positioned on the back side of the movable plug-in mounting plane and used for reversing a wiring terminal to one side of a plug end of the plug part, and the plug end is specifically a plug row. The main circuit connecting structure comprises a main circuit movable plug-in unit and a bidirectional plug-in unit which are spliced in a matched mode, part or all of the main circuit movable plug-in unit is the main circuit reversing plug-in unit, and the interphase center of the main circuit movable plug-in unit corresponds to the interphase center of the corresponding phase of the circuit breaker. The functional unit assembly of the functional unit and the unit chamber are connected with each other through the main circuit connecting structure to carry out main circuit incoming line. The beneficial effects are that: the bidirectional connector can be quickly replaced under the condition of no power failure while the fault of bus burnout is avoided; and the electroplated layer of the bus bar cannot be damaged.
Description
Technical Field
The utility model relates to a complete sets of switchgear technical field, especially a main circuit switching-over moves plug-in components, main circuit connection structure and functional unit.
Background
The functional units of the low-voltage switch complete equipment have three structural types of a fixed type, a plug-in type and a drawer type, the fixed type is basically applied to high-current structural equipment above 800A, the plug-in type is basically applied to 63A-630A separation units, and the drawer type structural equipment is basically applied to 32A-800A separation units. The fixed type and the plug-in type are in hard connection with the bus connection structure, and the drawer type adopts the plug to be in flexible connection with the bus.
As shown in fig. 12, 13, and 14, the circuit breaker of the plug-in functional unit is a plug-in circuit breaker 25, and the plug-in base 26 is used to connect with the plug-in switch, the plug-in base 26 is hard connected with the bus 12, the plug is provided on the plug-in circuit breaker 25, and the spring pressure socket is provided on the plug-in base 26.
The drawer type functional unit needs to be operated by a propelling mechanism and an interlocking mechanism, a main circuit plug is flexibly connected with a bus, the drawer is operated by the propelling mechanism, the drawer type functional unit has three-position functions of connection, test and separation, and a fixed switch is applied.
The plug-in functional unit is widely applied to a power distribution functional loop of low-voltage switch complete equipment.
The drawer type functional unit is widely applied to a motor control loop, and the application ratio of a power distribution loop is larger than that of the motor control loop.
In the industry standard, the plug-in functional unit has an openable unit door, and the drawer of the drawer-type functional unit has a drawer door panel, the unit door of the plug-in functional unit is mounted on the cabinet body, and the unit door of the drawer-type functional unit is the drawer door panel.
In order to solve the technical problems of the existing fixed type and plug-in type functional units, the inventor innovates a main circuit connection structure, a movable functional unit assembly and a movable functional unit of a main circuit body reversing plug and a main circuit body reversing plug connection circuit breaker, concretely refers to Chinese patent document CN211790382U, and realizes that the technical problems are solved by the main circuit connection structure of the main circuit body reversing plug and the main circuit body reversing plug connection circuit breaker: the wiring end of the existing main circuit plug is inconsistent with the wiring end face of the horizontal type circuit breaker. Therefore, the connection process can be connected with the circuit breaker only by adopting the overturning, and the copper is consumed, and the process structure of the specification 1 to 1 of the conductive connecting piece is manufactured. And the lever boosting propelling mechanism is used for realizing the quick and easy plugging operation.
However, in the industry, there is still a further need for a technology for operating a functional unit more quickly, and for replacing a faulty device and an auxiliary device more quickly when a fault occurs, or even for performing maintenance in a non-power-off state, especially in public service power utilization places such as IT industry, ships, drilling platforms, subways, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the conventional main circuit movable plug-in is directly plugged with the bus through a spring plug, so that the risk of burning the bus due to overheating of the main circuit movable plug-in is avoided.
The utility model provides a technical scheme that its technical problem adopted is: the main circuit reversing plug-in is divided into a plug part positioned on the front side of a mounting plane of the movable plug-in and a wiring terminal reversing part positioned on the back side of the mounting plane of the movable plug-in, wherein the plug part is provided with a plug end, the wiring terminal reversing part is provided with a wiring terminal, the wiring terminal reversing part is a transversely extending structure connected with the plug part and used for reversing the wiring terminal to one side of the plug end of the plug part, the plug end and the wiring terminal are respectively positioned on the front side and the back side of the mounting plane of the movable plug-in the longitudinal direction, the wiring terminal is positioned on the left side or the right side of the plug end in the transverse direction, the plug part and the wiring terminal reversing part are arranged in an insulating and isolating mode through an insulating shell, and the plug end is specifically a plug row.
Further defined, the main circuit switching insert includes a terminal strip and an insulating housing, the terminal strip being mounted within the insulating housing with a front end of the terminal strip extending as a plug end and a rear end of the terminal strip extending as a terminal end.
Further defined, a transverse extension section is arranged between the front end and the rear end of the terminal strip, the front end and the rear end of the terminal strip are respectively positioned on the front surface and the back surface of the transverse extension section and are in vertical relation, the insulating shell comprises a plug part and a transverse extension part, the front end of the terminal strip extends out of the plug part of the insulating shell to form a plug part of the main circuit reversing plug-in unit, the transverse extension section of the terminal strip is positioned on the transverse extension part of the insulating shell, and the rear end of the terminal strip extends out of the transverse extension part of the insulating shell to form a terminal reversing part of the main circuit reversing plug-in unit.
A main circuit connection structure, in particular to a main circuit incoming line connection structure of complete set switch equipment, comprising a main circuit movable plug-in unit and a bidirectional connector assembly which are spliced in pairs at each phase at the incoming line side, wherein the plug end of the main circuit movable plug-in unit for leading in the main circuit is a splicing row, part or all of the main circuit movable plug-in unit is the main circuit reversing plug-in unit, the bidirectional connector assembly is a main circuit connector assembly which is spliced in two directions through a spring plug, the bidirectional connector assembly is spliced and connected with a bus by the front end of the spring plug, the splicing row of the main circuit movable plug-in unit is inserted into the rear end of the bidirectional connector assembly and is spliced and connected with the rear end of the spring plug of the bidirectional connector assembly, the horizontal direction phase distance of the bidirectional connector assembly is consistent with the phase distance of the bus, the main circuit movable plug-in units and the bidirectional connector assembly which are spliced in pairs at each phase at the incoming line side are arranged in layers from top to bottom, and the phase distance center of the main circuit movable plug-in units is arranged corresponding to the phase center of the corresponding phase of a circuit breaker, the main circuit movable plug-in units are correspondingly connected with the corresponding circuit breakers one by one through conductive connecting pieces which are arranged in a layered mode from top to bottom.
Further inject, two-way connector includes spring plug and insulating casing, and spring plug installs in insulating casing, and two-way connector installs through insulating casing, and insulating casing's front end and rear end all have the opening that is used for pegging graft, have the installation flange on two-way connector's the insulating casing, and two-way connector installs through the installation flange.
A functional unit, in particular to a functional unit of complete set of switch equipment, comprises a unit chamber and a functional unit assembly in the unit chamber, wherein a main circuit inlet wire is arranged between the functional unit assembly and the unit chamber through a main circuit connecting structure, a main circuit movable plug-in is arranged on the functional unit assembly, and a bidirectional plug-in is arranged on a unit chamber back plate of the unit chamber and is directly connected with a bus in an inserting way.
Further, the main circuit movable connector is mounted on the rear portion of the functional unit assembly, and the bidirectional connector is detachably mounted on the unit chamber back plate from the unit chamber side.
The utility model has the advantages that: the bidirectional connector is connected with the bus in an inserting way, so that the fault of burning out the bus is avoided, and the bidirectional connector can be quickly replaced under the condition of no power failure when the bidirectional connector is overheated; meanwhile, the bidirectional connector and the bus cannot be frequently inserted, and an electroplated layer of the bus cannot be damaged.
Drawings
The present invention will be further explained with reference to the drawings and examples;
fig. 1 is a schematic structural view of a removable operation unit with a pull handle according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a door closing state of the removable operation unit with a handle according to embodiment 1 of the present invention;
fig. 3 is a schematic front structural view of a general main circuit movable plug-in unit according to embodiment 1 of the present invention;
fig. 4 is a schematic back structure view of a general main circuit movable plug-in unit according to embodiment 1 of the present invention;
fig. 5 is a schematic front view of the main circuit switching insert according to embodiment 1 of the present invention;
fig. 6 is a back structural schematic view of the main circuit switching insert according to embodiment 1 of the present invention;
fig. 7 is a schematic structural view of a unit cell according to embodiment 1 of the present invention;
FIG. 8 is a schematic view of the two-way connector of the present invention;
FIG. 9 is a cross-sectional view of the bi-directional connector of the present invention;
fig. 10 is a schematic structural view of a removable operation unit to which a lever power-increasing propulsion mechanism is added according to embodiment 1 of the present invention;
fig. 11 is a schematic structural view of a removable operation unit omitting an operation protection partition plate according to embodiment 1 of the present invention;
FIG. 12 is a schematic top view of the pluggable functional unit;
FIG. 13 is a schematic front view of the pluggable functional unit;
FIG. 14 is a schematic diagram of a rear structure of the pluggable functional unit;
in the figure, 1, a movable frame, 2, a circuit breaker, 7, a general main circuit movable plug-in, 8, a main circuit movable plug-in, 9, a plug row, 10, a terminal reversing part, 11, a conductive connecting piece, 12, a bus, 13, a unit chamber, 14, a unit door, 18, a unit chamber back plate, 19, a bidirectional connector, 20, a spring plug, 22, a terminal, 25, a plug-in circuit breaker, 26, a plug-in base, 27, a mounting flange and 28, a movable plug-in mounting plane.
Detailed Description
As shown in fig. 5 and 6, the main circuit switching board 8 is divided into a plug portion located on the front side of the board mounting plane 28 and a terminal switching portion 10 located on the back side of the board mounting plane 28, the plug portion has a plug end, the terminal switching portion 10 has a terminal 22, the terminal switching portion 10 is a transversely extending structure connected to the plug portion, the terminal 22 is switched to one side of the plug end of the plug portion, the plug end and the terminal 22 are respectively located on the front and back sides of the board mounting plane 28 in the longitudinal direction, the terminal 22 is located on the left or right side of the plug end in the transverse direction, the plug portion and the terminal switching portion 10 are insulated and isolated by an insulating housing, and the plug end is specifically a plug row 9.
The main circuit changeover plug-in 8 comprises a terminal strip and an insulating housing, the terminal strip being mounted in the insulating housing with the front end of the terminal strip projecting as a plug end and the rear end of the terminal strip projecting as a terminal 22. The front end and the rear end of the terminal strip are transversely extended sections, the front end and the rear end of the terminal strip are respectively positioned on the front surface and the back surface of the transversely extended sections and are in vertical relation, the insulating shell comprises a plug part and a transversely extended part, the front end of the terminal strip extends out of the plug part of the insulating shell to form a plug part of the main circuit reversing plug-in unit 8, the transversely extended section of the terminal strip is positioned on the transversely extended part of the insulating shell, and the rear end of the terminal strip extends out of the transversely extended part of the insulating shell to form a terminal reversing part 10 of the main circuit reversing plug-in unit 8.
As shown in fig. 3 and 4, the general main circuit movable plug 7 is of a non-commutating structure including a terminal block and an insulating housing, the terminal block is mounted in the insulating housing, a front end of the terminal block extends out of the insulating housing as a plug end, and a rear end of the terminal block extends out of the insulating housing as a terminal 22, and the plug end and the terminal 22 of the general main circuit movable plug 7 are located on a straight line in a longitudinal direction compared to the main circuit movable plug 8.
As shown in fig. 1 to 11, a main circuit incoming line connection structure of a switchgear assembly includes a main circuit movable plug and a bidirectional connector 19 which are mated and plugged with each other at an incoming line side, a plug end of the main circuit movable plug for main circuit incoming line is a plug row 9, a part or all of the main circuit movable plug is the main circuit reversing plug 8, the bidirectional connector 19 is a main circuit connector which is plugged with each other bidirectionally through a spring plug 20, the bidirectional connector 19 is plugged with a bus 12 through a front end of the spring plug 20, the plug row 9 of the main circuit movable plug is plugged into a rear end of the bidirectional connector 19 and is plugged with a rear end of the spring plug 20 of the bidirectional connector 19, a horizontal direction interval of the bidirectional connector 19 is consistent with a phase interval of the bus 12, the main circuit movable plug and the bidirectional connector 19 which are mated and plugged with each other at the incoming line side are layered from top to bottom, and the inter-phase centers of the main circuit movable plug-ins and the inter-phase centers of the corresponding phases of the circuit breaker 2 are correspondingly arranged, and the main circuit movable plug-ins are connected with the corresponding phases of the circuit breaker 2 in a one-to-one correspondence manner through conductive connecting pieces 11 which are hierarchically arranged from top to bottom.
As shown in fig. 7, 8 and 9, the bidirectional connector 19 includes a spring pin 20 and an insulating housing, the spring pin 20 is mounted in the insulating housing, the bidirectional connector 19 is mounted through the insulating housing, both the front end and the rear end of the insulating housing have openings for plugging, the insulating housing of the bidirectional connector 19 has a mounting rib 27 thereon, and the bidirectional connector 19 is mounted through the mounting rib 27.
A functional unit assembly of a complete set of switch equipment is specifically a movable plugging operation assembly and comprises a movable rack 1 and a circuit breaker 2 installed on the movable rack 1, wherein the inner space of the movable rack 1 is divided into an operation area used for plugging operation in the front and a main circuit area used for installing main circuit devices in the rear, and the circuit breaker 2 is located in the main circuit area. The movable main circuit plug-in is installed at the rear part of the movable frame 1 and is used for leading in a main circuit.
A functional unit of a complete set of switch equipment, in particular to a movable plugging operation unit, comprises a unit chamber 13 and the movable plugging operation assembly in the unit chamber 13, wherein an openable unit door 14 is arranged on the unit chamber 13. The main circuit incoming line is conducted between the movable plugging operation assembly and the unit chamber 13 through the main circuit incoming line connection structure of the complete set of switch equipment, a main circuit movable plug-in unit at the rear part of the movable rack 1 of the movable plugging operation assembly is plugged with the bidirectional plug-in unit 19 in a matching mode, and the bidirectional plug-in unit 19 is detachably installed on the unit chamber back plate 18 from one side of the unit chamber 13 through the installation retaining edge 27 and is directly plugged and connected with the bus 12. Specifically, the mounting ribs 27 are detachably mounted by screws.
In fig. 1 and 2, the main circuit has A, B, C three phases, the a phase and the B phase on the incoming line side use a common main circuit moving plug 7, the C phase uses a main circuit switching plug 8, the terminals 22 of the main circuit moving plugs of the a phase and the C phase are arranged in a row from top to bottom, and the terminal 22 of the main circuit moving plug of the B phase is misaligned with the terminal 22 of the main circuit moving plug of the A, C phase.
A, B, C three phases arranged from top to bottom on the wire inlet side of the circuit breaker 2 are connected with main circuit movable plug-ins of corresponding phases in a one-to-one correspondence mode through conductive connecting pieces 11 arranged in a layered mode from top to bottom, A, B, C three phases of main circuit movable plug-ins and two-way plug-ins 19 which are spliced in a matched mode are arranged in a layered mode from top to bottom, the horizontal direction phase distance of the A, B, C three-phase two-way plug-ins 19 is consistent with the phase distance of buses 12 of A, B, C three phases, the inter-phase center of the A, B, C three-phase main circuit movable plug-ins is arranged in a corresponding mode with the inter-phase center of A, B, C three phases of the circuit breaker 2, and the corresponding phases of the main circuit movable plug-ins and the circuit breaker 2 can be connected in a one-to-one correspondence mode through the conductive connecting pieces 11 arranged in a layered mode from top to bottom.
The removable plug operating unit shown in fig. 1 and 2 has a pull handle for pulling out the removable plug operating assembly, which is respectively mounted on the operation protection isolation plate 3 and the removable rack 1. The removable plug operating unit shown in fig. 10 is substantially supplemented with a lever power-boosting mechanism compared to the removable plug operating units shown in fig. 1 and 2. The removable operating unit shown in fig. 11 is largely free of an operation protective partition plate compared to the removable operating units shown in fig. 1 and 2, and both handles are mounted on the removable housing 1.
Example 2, the difference from example 1 is that: the functional unit assembly is a drawer, and the functional unit is a drawer unit.
The present invention relates to a connection structure in which the movable insertion/extraction operation unit, the main circuit changeover movable plug 8, and the inter-phase center of the main circuit movable plug coincide with the inter-phase center of the corresponding phase of the circuit breaker 2, which is described in chinese patent document CN211790382U by the inventor, and is not developed in more detail. The main circuit movable plug-in unit and the main circuit movable plug-in unit 8 disclosed in the embodiment of chinese patent document CN211790382U of the present invention are different in that the plug end is a socket bar 9, and the socket bar 9 is connected to a bidirectional connector 19, and the bidirectional connector 19 is connected to a bus 12.
The utility model discloses a what figure 1, 2, 10 and 11 show can move plug operating unit is applied to the low-voltage switch complete sets distribution function return circuit of various electric current grades below 630A, and cell door 14 specifically installs on the stand of the cabinet body. The connection and the separation of the primary power supply and the secondary power supply can be completed within 10S to 20S. When a fault occurs, the fault device and the auxiliary device can be quickly replaced under the state of no power failure, and the device and the auxiliary device are particularly suitable for public service power utilization places such as IT industry, ships, drilling platforms, subways and the like.
The utility model discloses a main circuit switching-over moves plug-in components 8 and the main circuit of each looks pairing grafting of incoming line side and two-way connector 19 from top to bottom the layering is arranged to the main circuit moves the alternate center of plug-in components and the corresponding alternate center of corresponding looks of circuit breaker 2 and corresponds the main circuit connection structure who sets up, the connection of exempting from to turn over has been realized, the simplified process, conveniently make and install, reduce the tie point, conductive connecting piece 11 economizes copper 50%, move plug-in components 8 connection circuit breaker 2 through this main circuit switching-over simultaneously and can also reduce the installation space around.
The utility model discloses a plug end is 9 main circuit switching-over movable plug-in components 8 and 19 plug connection of two-way connector for pegging graft, and two-way connector 19 and generating line 12 plug connection's main circuit connection structure when stopping the trouble of burning out generating line 12, can also be when finding two-way connector 19 overheated, quick replacement two-way connector 19 under the state of not cutting off the power supply.
Claims (7)
1. The utility model provides a main circuit switching over moves plug-in components, specifically be the main circuit switching over of complete sets of switchgear moves plug-in components, be divided into the plug part that is located the front of moving plug-in components mounting plane and be located the wiring terminal switching-over part of moving plug-in components mounting plane's back, the plug part has the plug end, wiring terminal switching-over part has the wiring terminal, wiring terminal switching-over part is the horizontal extension structure who is connected with the plug part, a side for commutating the wiring terminal to the plug end of plug part, plug end and wiring terminal are located the front and back both sides of moving plug-in components mounting plane respectively in longitudinal direction, wiring terminal is located the left side or the right side of plug end in horizontal direction, plug part and wiring terminal switching-over part pass through the insulating casing insulation isolation setting, characterized by: the plug end is specifically a plug row.
2. The main circuit commutation insert of claim 1, wherein: the terminal strip is installed in the insulating shell, the front end of the terminal strip extends out to serve as a plug end, and the rear end of the terminal strip extends out to serve as a wiring end.
3. The main circuit commutation insert of claim 2, wherein: the terminal strip comprises a front end and a rear end, wherein the front end and the rear end of the terminal strip are respectively positioned on the front surface and the back surface of the transverse extension section and are in a vertical relation, the insulating shell comprises a plug part and a transverse extension part, the front end of the terminal strip extends out of the plug part of the insulating shell to form a plug part of the main circuit reversing plug-in unit, the transverse extension section of the terminal strip is positioned on the transverse extension part of the insulating shell, and the rear end of the terminal strip extends out of the transverse extension part of the insulating shell to form a terminal reversing part of the main circuit reversing plug-in unit.
4. The utility model provides a main circuit connection structure, specifically is complete set of switchgear's main circuit inlet wire connection structure, characterized by: the main circuit movable plug-in unit comprises a main circuit movable plug-in unit and a bidirectional plug-in unit which are matched and plugged with each other on the wire inlet side, wherein the plug end of the main circuit movable plug-in unit, which is used for carrying out main circuit wire inlet, is a plug row, part or all of the main circuit movable plug-in unit is the main circuit reversing movable plug-in unit as claimed in claim 1, 2 or 3, the bidirectional plug-in unit is a main circuit plug-in unit which is plugged with a bidirectional plug through a spring plug, the bidirectional plug-in unit is plugged and connected with a bus through the front end of the spring plug, the plug row of the main circuit movable plug-in unit is plugged and connected with the rear end of the spring plug of the bidirectional plug-in unit,
the phase distance of the horizontal direction of the bidirectional connector is consistent with the phase distance of the bus, the main circuit movable plug-in units and the bidirectional connector which are spliced in pairs on each phase on the wire inlet side are arranged in a layered mode from top to bottom, the phase centers of the main circuit movable plug-in units are arranged corresponding to the phase centers of corresponding phases of the circuit breaker, and the main circuit movable plug-in units are connected with the corresponding phases of the circuit breaker in a one-to-one corresponding mode through conductive connecting pieces which are arranged in a layered mode from top to bottom.
5. The main circuit connection structure according to claim 4, wherein: the bidirectional connector comprises a spring plug and an insulating shell, the spring plug is arranged in the insulating shell, the bidirectional connector is arranged through the insulating shell, the front end and the rear end of the insulating shell are provided with openings for insertion,
the insulating shell of the bidirectional connector is provided with an installation flange, and the bidirectional connector is installed through the installation flange.
6. A functional unit, specifically a functional unit of complete set switchgear, includes the functional unit assembly in unit room and the unit room, characterized by: a main circuit inlet wire is arranged between the functional unit assembly and the unit chamber through the main circuit connecting structure of claim 4, a main circuit movable plug-in is arranged on the functional unit assembly, and a bidirectional plug-in is arranged on a unit chamber back plate of the unit chamber and is directly connected with a bus in an inserting mode.
7. The functional unit of claim 6, wherein: the main circuit movable plug-in is installed at the rear part of the functional unit assembly, and the bidirectional plug-in is detachably installed on the back plate of the unit chamber from one side of the unit chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121053837.4U CN214898297U (en) | 2021-05-14 | 2021-05-14 | Main circuit reversing plug-in, main circuit connecting structure and functional unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121053837.4U CN214898297U (en) | 2021-05-14 | 2021-05-14 | Main circuit reversing plug-in, main circuit connecting structure and functional unit |
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| Publication Number | Publication Date |
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| CN214898297U true CN214898297U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121053837.4U Active CN214898297U (en) | 2021-05-14 | 2021-05-14 | Main circuit reversing plug-in, main circuit connecting structure and functional unit |
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| CN (1) | CN214898297U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU229853U1 (en) * | 2024-07-30 | 2024-10-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Busbar compartment of the complete switchgear |
-
2021
- 2021-05-14 CN CN202121053837.4U patent/CN214898297U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU229853U1 (en) * | 2024-07-30 | 2024-10-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Busbar compartment of the complete switchgear |
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