CN218386209U - Low-voltage bus-bar switch cabinet and system with power transmission loop - Google Patents

Abstract

The utility model discloses a low-voltage bus-tie switch cabinet and a system comprising a power transmission loop, which comprises a device main body, a shell part and a connecting part, wherein the shell part is arranged outside the connecting part; an electromagnetic assembly including a magnet part and a fixing part; the heat dissipation assembly comprises a hollow part and a sliding part, and the hollow part and the sliding part are arranged on one side of the shell part. The utility model discloses a set up shell part and adapting unit, be connected two sets of generating lines and sub-line, can select different generating lines through controlling different switches. Meanwhile, the magnet component is matched with the sliding component, if the bus at one end is electrified, magnetic force is generated to enable the sliding component to move, the heat dissipation hole is opened to dissipate heat, the heat dissipation efficiency of the device can be improved, and the loop is protected pertinently. On the other hand, the recovery of the power consumption of the superior power supply after the power supply loses work is realized by arranging the auxiliary contact and the double loops, and the device is high in economy, safe and reliable.

Description

Low-voltage bus-bar switch cabinet and system with power transmission circuit

Technical Field

The utility model relates to a power equipment technical field, especially a system that female cubical switchboard of alliing oneself with and contain power transmission return circuit of low pressure.

Background

Under the condition of realizing double-line power supply, each power supply respectively supplies power to the corresponding load, and if one power supply is damaged, the rest power supply is required to supply power to all the loads. When the system has two power supply incoming lines and the two power supply incoming lines are mutually standby, main buses of the two power supply incoming lines need to be communicated, and a switch cabinet for communicating the two buses is called a bus connection cabinet. It is to be noted here that the bus bars and sub-lines in a bus bar cabinet are normally prohibited from closing at the same time.

Meanwhile, a 400V working bus A and a 400V working bus B are arranged in the existing factory, the two sections are connected by a bus coupler switch, and when a higher-level power supply cannot supply power, the bus coupler switch is used for supplying power; at present, a bus coupler switch is not provided with an automatic switching device, the same period cannot be judged, and an auxiliary contact at the switching-on position of a superior 6kV incoming line switch is required to be taken as a condition for judging the same period switching-on; when higher level 6kV generating line takes place ground connection, 6kV generating line service switch disconnection, 400V working segment bus allies oneself with the switch-on condition, and 400V working bus can't restore the station service through the bus allies oneself with the switch and uses electricity, leads to the accident to influence to enlarge.

In view of the above, there is a need for a low-voltage buscouple switch cabinet and a control loop system capable of recovering 400V power supply of a working buscouple switch in an accident.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems that exist in the prior art buscouple switch.

Therefore, one of the purposes of the present invention is to provide a low-voltage bus coupler switch cabinet, which can also dissipate heat of different bus connections by controlling the connection of different buses through switches.

In order to solve the technical problem, the utility model provides a following technical scheme: a low-voltage bus-bar switch cabinet comprises a device main body, a shell part and a connecting part, wherein the shell part is arranged on the outer side of the connecting part; the electromagnetic assembly is connected with the device main body and comprises a magnet part and a fixing part; and the heat dissipation assembly comprises a hollow part and a sliding part, and is arranged on one side of the shell part.

As a preferred scheme of female cubical switchboard that allies oneself with of low pressure, wherein: the shell part comprises a shell body, a bus duct and output wire grooves, the bus duct is arranged on the upper side of the shell body and is provided with a plurality of output wire grooves, the output wire grooves are arranged on the lower side of the shell body, and a switch door is connected to one side of the shell body.

As a preferred scheme of female cubical switchboard that allies oneself with of low pressure, wherein: the connecting part is arranged in the outer shell and comprises a wire holder and a control switch, a wire connecting groove is formed in the wire holder, and one end of the control switch is arranged in the wire connecting groove.

As a female preferred scheme who allies oneself with cubical switchboard of low pressure, wherein: the magnet component comprises an electromagnet and a connecting wire arranged at one end of the electromagnet, and the connecting wire is connected with the wiring groove.

As a preferred scheme of female cubical switchboard that allies oneself with of low pressure, wherein: the fixing component comprises an electromagnetic seat, a fixing groove is formed in the electromagnetic seat, and the electromagnet and the connecting wire are arranged in the fixing groove.

As a preferred scheme of female cubical switchboard that allies oneself with of low pressure, wherein: the hollow part comprises a hollow plate with heat dissipation holes in the middle and a fixing frame arranged on one side of the outer shell, the fixing frame is connected with the outer shell through bolts, and the hollow plate is fixedly connected to one side of the fixing frame.

As a preferred scheme of female cubical switchboard that allies oneself with of low pressure, wherein: the sliding component comprises a sliding plate and a magnetic block, the middle of the sliding plate is provided with a heat dissipation hole, the sliding plate is arranged inside the fixing frame and is in sliding connection with the fixing frame, and the heat dissipation hole in the hollow plate is not communicated with the heat dissipation hole in the sliding plate.

As a preferred scheme of female cubical switchboard that allies oneself with of low pressure, wherein: the magnetic blocks are arranged at the lower end of the electromagnet, two magnetic blocks are arranged and are arranged at the upper end of the sliding plate, the lower end of the sliding plate is provided with a movement spring, and the lower end of the movement spring is fixedly connected into the fixed frame.

Another object of the present invention is to provide a system including a power transmission circuit, which enables a control circuit system for recovering 400V power transmission from a master switch under an accident, the system including: the low-voltage bus-bar connection switch cabinet further comprises a loop module, wherein the loop module comprises a first control loop of the inlet wire switch separating brake and a second control loop of the inlet wire switch separating brake, and the two loops are in parallel connection.

As a preferable aspect of the system including the power transmission circuit of the present invention, wherein: the loop module main components include relays and auxiliary contacts.

The utility model has the advantages that: the utility model discloses a set up shell part and adapting unit, be connected two sets of generating lines and sub-line, can select different generating lines through controlling different switches. Meanwhile, the magnet component is matched with the sliding component, if one end of the bus is electrified, magnetic force is generated to enable the sliding component to move, the radiating holes are opened to radiate heat, the radiating efficiency of the device can be improved, and a loop is protected pertinently. On the other hand, the recovery of the power consumption of the superior power supply after the power supply loses work is realized by arranging the auxiliary contact and the double loops, and the device is high in economy, safe and reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

fig. 1 is the overall structure schematic diagram of the embodiment provided by the low-voltage bus-bar switch cabinet of the present invention.

Fig. 2 is a schematic structural diagram of the device main body according to the embodiment of the low-voltage bus-bar switch cabinet of the present invention.

Fig. 3 is a schematic structural diagram of the electromagnetic assembly according to the embodiment of the low-voltage bus-bar switch cabinet of the present invention.

Fig. 4 is a schematic structural diagram of the magnet component according to the embodiment of the low-voltage bus-bar switch cabinet of the present invention.

Fig. 5 is a schematic structural view of the heat dissipation assembly according to the embodiment of the low-voltage bus-bar switch cabinet of the present invention.

Fig. 6 is a schematic view of the structural connection of the heat dissipation assembly according to the embodiment of the low-voltage bus-bar switch cabinet of the present invention.

Fig. 7 is a schematic structural diagram of the sliding component according to the embodiment of the low-voltage bus-bar switch cabinet of the present invention.

Fig. 8 is a diagram of an original circuit according to an embodiment of the present invention provided with a system including a power transmission circuit.

Fig. 9 is a modified circuit diagram of the system including the power transmission circuit according to the embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, other ways of implementing the invention may be devised different from those described herein, and it will be apparent to those skilled in the art that the invention can be practiced without departing from the spirit and scope of the invention.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 5, for a first embodiment of the present invention, there is provided an overall structure schematic diagram of a low-voltage bus-bar switch cabinet, as shown in fig. 1, the overall structure of the present invention includes a device main body 100, including a housing part 101 and a connecting part 102, the housing part 101 is disposed outside the connecting part 102; an electromagnetic assembly 200 connected to the apparatus body 100 and including a magnet part 201 and a fixing part 202; and a heat dissipating assembly 300 including a hollow part 301 and a sliding part 302, both disposed at one side of the housing part 101.

Specifically, the main structure of the present invention includes a device body 100, an electromagnetic assembly 200, and a heat dissipation assembly 300. The device body 100 includes a housing member 101 and a connection member 102, and the housing member 101 is disposed outside the connection member 102. Two sets of bus bars and one set of sub-lines pass through the housing part 101 to the connecting part 102, and the two-end contacts are connected by the connecting part 102. Different bus bars and sub-lines can be selected for connection by controlling connecting part 102.

The electromagnetic assembly 200, which is connected to the apparatus body 100, includes a magnet member 201 and a fixing member 202. The magnet member 201 is disposed on the upper side of the housing member 101, the magnet member 201 is disposed inside the fixing member 202, the magnet member 201 connects different bus lines and sub lines via the connecting member 102, and the generated connecting current can generate magnetism to control the sliding member 302.

The heat dissipation assembly 300 includes a hollow part 301 and a sliding part 302, and both are disposed on one side of the housing part 101. The sliding part 302 can move under the influence of magnetic force, and through moving, the air outlet mesh holes arranged inside and the ventilation mesh holes of the hollow part 301 are concentrically arranged, so that heat generated in the connection process of the connecting part 102 can be dissipated.

The operation process is as follows: two sets of bus bars and one set of sub-lines pass through the housing part 101 to the connecting part 102, and the two-end contacts are connected by the connecting part 102. Control link 102 may select different bus bars to connect with sub-lines. The magnet member 201 is connected to different bus lines and sub lines via the connecting member 102, and the connecting current generated thereby can generate a magnetic force to control the sliding member 302. The sliding part 302 can move up and down under the influence of magnetic force, and through moving, the ventilation meshes arranged in the sliding part 302 and the ventilation meshes of the hollow part 301 are concentrically arranged, so that heat generated in the connection process of the connecting part 102 can be dissipated.

Example 2

The second embodiment of the present invention refers to fig. 2 to 7, and this embodiment is different from the first embodiment in that: the housing member 101 includes an outer housing 103, 2 bus ducts 104 and two output line slots 105, wherein the bus ducts 104 are disposed on the upper side of the outer housing 103, the output line slots 105 are disposed on the lower side of the outer housing 103, and one side of the outer housing 103 is connected to a switch door 103a. The connection part 102 is disposed inside the outer housing 103, and includes a wire holder 106 and a control switch 107, wherein the wire holder 106 is provided with a wire slot 108 inside, and one end of the control switch 107 is disposed inside the wire slot 108.

Specifically, the outer shell member 101 includes an outer shell 103, bus ducts 104 and output line slots 105, the bus ducts 104 are disposed on the upper side of the outer shell 103, and are 2, the output line slots 105 are disposed on the lower side of the outer shell 103, and the switch door 103a is connected to one side of the outer shell 103. The switch door 103a can be closed after the connection is completed, and the outer wall can be made of transparent material to facilitate observation of the internal connection condition. The rear end of the outer housing 103 is provided with a fixing means, and the outer housing 103 can be connected to a wall by bolts.

The connection part 102 is disposed inside the outer housing 103, and includes a wire holder 106 and a control switch 107, wherein the wire holder 106 is provided with a wire slot 108 inside, and one end of the control switch 107 is disposed inside the wire slot 108. The provision of the wire slots 108 allows for the securing of bus and sub-wires connected to the wire holder 106 and facilitates maintenance. The outer rod surface of the control switch 107 is wrapped with an insulating means.

The rest of the structure is the same as in example 1.

The operation process is as follows: in use, two groups of bus bars can be connected to the wire holder 106 through different bus ducts 104, and then sub-lines can be connected to the wire holder 106 through the output wire grooves 105 on the lower side of the outer shell 103. After the connection is completed, different buses and sub-lines can be selected for connection by pressing different bus control switches 107 according to different practical conditions.

Example 3

Referring to fig. 2 to 7, schematic diagrams of a low-voltage bus-tie switch cabinet according to a third embodiment of the present invention are shown, which is different from the first embodiment: the magnet member 201 includes an electromagnet 203 and a connection wire 204 provided at one end of the electromagnet 203, the connection wire 204 being interconnected with the wire connection slot 108. The fixing member 202 includes an electromagnet base 205, a fixing groove 205a is provided inside the electromagnet base 205, and the electromagnet 203 and the connecting wire 204 are provided in the fixing groove 205 a. The hollow part 301 comprises a hollow plate 303 with a heat dissipation hole in the middle and a fixing frame 304 arranged on one side of the outer shell 304, the fixing frame 304 is connected with the outer shell 103 through bolts, and the hollow plate 303 is fixedly connected on one side of the fixing frame 304.

The sliding part 302 comprises a sliding plate 305 and a magnetic block 306, the middle of the sliding plate 305 is provided with a heat dissipation hole, the sliding plate 305 is arranged inside the fixed frame 304, and the sliding plate 305 is connected with the fixed frame 304 in a sliding mode. The two magnetic blocks 306 are arranged at the lower end of the electromagnet 203, and are arranged at the upper end of the sliding plate 305, the lower end of the sliding plate 305 is provided with a moving spring 307, and the lower end of the moving spring 307 is fixedly connected to the inside of the fixed frame 304.

Specifically, the main body structure of the present invention includes a device main body 100, an electromagnetic assembly 200, and a heat dissipation assembly 300. Wherein the magnet member 201 includes an electromagnet 203 and a connection wire 204 provided at one end of the electromagnet 203, the connection wire 204 being interconnected with the connection slot 108. The electromagnet 203 is provided with a coil on its surface and can be connected to a working circuit through a connection 204, and when energized, a magnetic force can be generated at the front end of the electromagnet 203. The connecting wire 204 is connected to the wire holder 106 through a hole provided at the upper end of the outer housing 103.

The fixing member 202 includes an electromagnet base 205, a fixing groove 205a is formed in the electromagnet base 205, and the electromagnet 203 and the connecting wire 204 are disposed in the fixing groove 205 a. The upper end of the outer housing 103 is also provided with a fixing groove, and the position of the electromagnet 203 is fixed together with the fixing groove 205a at the bottom end of the electromagnet holder 205. The electromagnetic base 205 is fixed to the upper side of the outer case 103 by bolts.

The hollow part 301 comprises a hollow plate 303 with a heat dissipation hole in the middle and a fixing frame 304 arranged on one side of the outer shell 304, the fixing frame 304 is connected with the outer shell 103 through bolts, and the hollow plate 303 is fixedly connected on one side of the fixing frame 304. The hollow plate 303 is disposed on a side wall of the outer housing 103, and a fixing frame 304 is disposed between the hollow plate 303 and the outer housing 103, and the fixing frame 304 mainly functions to cooperate with the sliding plate 305.

The sliding part 302 comprises a sliding plate 305 and a magnetic block 306, the middle of the sliding plate 305 is provided with a heat dissipation hole, the sliding plate 305 is arranged inside the fixed frame 304, and the sliding plate 305 is connected with the fixed frame 304 in a sliding mode. The sliding plate 305 and the hollow-out plate 303 are both provided with densely distributed heat dissipation holes, the heat dissipation holes of the sliding plate 305 and the hollow-out plate 303 are alternately isolated under a normal state and are not concentrically arranged, and the design can enable the outer shell 103 to be in a sealing state when not powered on. When the sliding plate 305 slides, the heat dissipation holes of the two are concentric through holes, so that heat can be dissipated quickly.

The two magnetic blocks 306 are arranged at the lower end of the electromagnet 203, and are arranged at the upper end of the sliding plate 305, the lower end of the sliding plate 305 is provided with a moving spring 307, and the lower end of the moving spring 307 is fixedly connected to the inside of the fixed frame 304. The magnetic blocks 306 are disposed below the electromagnet 203, and when the electromagnet 203 is energized to generate a magnetic force, a repulsive force is generated to the magnetic blocks 306, thereby allowing the sliding plate 305 to move downward. When the current is removed, the magnetic force is removed, and the slide plate 305 is returned to the original position by the movement spring 307.

The rest of the structure is the same as in example 2.

The operation process comprises the following steps: when the control switch 107 selects different bus bars and sub-lines, current is generated when the bus bars and the sub-lines are connected, and when the electromagnet 203 is energized to generate magnetic force, repulsive force is generated to the magnetic blocks 306 on the lower side, so that the sliding plate 305 moves downward. When the sliding plate 305 slides, a concentric through hole state is formed with the heat dissipation hole of the hollow plate 30, and heat generated during the connection process can be dissipated quickly. When another bus is selected for connection, the power is removed and the magnetic force is removed, and the slide plate 305 is returned to its original position by the moving spring 307. The heat dissipation holes of the two are alternately isolated in a normal state and are not concentrically arranged, so that the outer shell 103 is in a sealing state when not electrified.

Example 4

Referring to fig. 8 and 9, there is shown a schematic diagram of a system including a power delivery circuit, which differs from the first embodiment in that: the low-voltage bus-tie switch cabinet comprises the low-voltage bus-tie switch cabinet and further comprises a loop module 400, wherein the loop module 400 comprises a first control loop 401 for opening the inlet wire switch and a second control loop 402 for opening the inlet wire switch, the two loops are connected in parallel, and main elements of the loop module 400 comprise a relay 403 and an auxiliary contact 404.

In this embodiment, the work requirement under the accident condition can't be satisfied to current 400V active section bus-bar connection switch, can't realize the recovery of the power consumption after higher level's power loses, is unfavorable for the operation personnel to carry out accident handling, influences equipment safety. In order to solve the problem, in the embodiment, a switching-on control circuit for transforming the 400V working section bus coupler switch is provided, when the 400V working a and B section incoming line switches 4111 and 4112 are still switched off, the 400V working section bus coupler switch is allowed to be switched on, the switching-off positions of the 400V working a and B section incoming line switches 4111 and 4112 are taken as auxiliary contacts to be judged, and the recovery of the 400V working section power consumption after the upper power supply loses is realized. This bus tie switch setting can make this cubical switchboard have the effect that the power consumption resumes through changing the power transmission return circuit among the cubical switchboard.

Specifically, under a normal working condition, when the 6kV bus incoming line switches 61A and 61B are switched on, the contacts KL1 and KL2 are simultaneously closed, and the 400V working section bus coupler switch is allowed to be switched on; or the 6kV bus standby incoming line switches 061A and 061B are switched on, the contacts KL3 and KL4 are simultaneously switched on, and the 400V working section bus coupler switch is allowed to be switched on. The first control loop 401 is a control loop for judging the opening of the 400V working A section incoming line switch 4111, the second control loop 402 is a control loop for judging the opening of the 400V working B section incoming line switch 4112, and the two components are in parallel connection. The auxiliary contacts 404 comprise contacts KL3, KL4 and the relay 403 comprises inlet switches 4111, 4112.

Under the accident condition, when the 400V working A section incoming line switch 4111 is switched off, the contact KM3 is closed, and the 400V working section bus-bar switch allows switching on; or when the 400V working B section incoming line switch 4112 is switched off, the contact KM4 is closed, and the 400V working section bus-bar switch allows switching on.

The technology has high economy, is safe and reliable after debugging, can recover 400V station service power in time when an accident occurs or equipment is overhauled, and ensures the reliability of the 400V station service power supply. The debugging accuracy is influenced by the interference of other factors in the simulated accident working condition, and an accurate result is obtained through multiple tests.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not have been described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or substituted by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a low-voltage bus-tie switch cabinet which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a device body (100) including a housing member (101) and a connection member (102), the housing member (101) being disposed outside the connection member (102);

an electromagnetic assembly (200) connected to the apparatus body (100) and including a magnet member (201) and a fixing member (202); and (c) a second step of,

the heat dissipation assembly (300) comprises a hollow part (301) and a sliding part (302), and the hollow part and the sliding part are arranged on one side of the shell part (101).

2. The low-voltage bus-tie switch cabinet according to claim 1, characterized in that: the shell part (101) comprises an outer shell (103), a bus duct (104) and output wire grooves (105), wherein the bus duct (104) is arranged on the upper side of the outer shell (103) and is provided with 2 output wire grooves (105) arranged on the lower side of the outer shell (103), and one side of the outer shell (103) is connected with a switch door (103 a).

3. The low-voltage bus-tie switch cabinet according to claim 2, characterized in that: the connecting component (102) is arranged inside the outer shell (103) and comprises a wire holder (106) and a control switch (107), a wire slot (108) is formed in the wire holder (106), and one end of the control switch (107) is arranged in the wire slot (108).

4. The low-voltage bus-tie switch cabinet according to claim 3, characterized in that: the magnet component (201) comprises an electromagnet (203) and a connecting wire (204) arranged at one end of the electromagnet (203), and the connecting wire (204) is connected with the connecting groove (108).

5. The low-voltage bus-tie switch cabinet according to claim 4, wherein: the fixing component (202) comprises an electromagnetic seat (205), a fixing groove (205 a) is formed in the electromagnetic seat (205), and the electromagnet (203) and the connecting line (204) are arranged in the fixing groove (205 a).

6. The low-voltage bus-tie switch cabinet according to claim 5, wherein: the hollow part (301) comprises a hollow plate (303) with heat dissipation holes in the middle and a fixing frame (304) arranged on one side of the bus duct (104), the fixing frame (304) is connected with the outer shell (103) through bolts, and the hollow plate (303) is fixedly connected to one side of the fixing frame (304).

7. The low-voltage bus-tie switch cabinet according to claim 6, characterized in that: the sliding part (302) comprises a sliding plate (305) and a magnetic block (306), the middle of the sliding plate (305) is provided with a heat dissipation hole, the sliding plate (305) is arranged inside a fixed frame (304), the sliding plate (305) is in sliding connection with the fixed frame (304), and the heat dissipation hole inside the hollow plate (303) is not communicated with the heat dissipation hole inside the sliding plate (305).

8. The low-voltage bus-tie switch cabinet according to claim 7, wherein: the magnetic blocks (306) are arranged at the lower end of the electromagnet (203), two magnetic blocks (306) are arranged and are arranged at the upper end of the sliding plate (305), the lower end of the sliding plate (305) is provided with a moving spring (307), and the lower end of the moving spring (307) is fixedly connected to the inside of the fixed frame (304).

9. A system including a power delivery circuit, comprising: the low-voltage bus-bar switch cabinet comprises the low-voltage bus-bar switch cabinet as claimed in claim 1, and further comprises,

the loop module (400) comprises a first control loop (401) for the opening of the incoming line switch and a second control loop (402) for the opening of the incoming line switch, and the first control loop (401) and the second control loop (402) are connected in parallel.

10. A system including a power delivery circuit as set forth in claim 9, wherein: the loop module (400) comprises, as main components, a relay (403) and an auxiliary contact (404).

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