CN115275942A - Low-voltage switch cabinet - Google Patents

Abstract

The invention relates to the technical field of power distribution equipment, in particular to a low-voltage switch cabinet which comprises a main body structure, wherein the main body structure comprises a cabinet body, a space is formed in the cabinet body, supporting plates are fixedly connected to the middle part and the bottom of the top of the inner surface of the cabinet body, a power inlet is fixedly connected to the middle part of the front part of the supporting plate at the top, a power switch is arranged at the top of the back part of the other side of the cabinet body, a battery jar is arranged at the bottom of the power switch, a disconnecting structure is arranged outside the power switch and comprises a disconnecting switch, live wires are arranged on two sides of the disconnecting switch, a rubber fixing disc is arranged on the other side of the live wires on the other side, three inserting blocks are fixedly connected to the other side of the rubber fixing disc, two fixing bolts are arranged on the top and the bottom of the middle part of the rubber fixing disc, connecting blocks are arranged on the front parts of the three inserting blocks, and electromagnetic circuits are fixedly connected to the bottoms of the two live wires.

Description

Low-voltage switch cabinet

Technical Field

The invention relates to the technical field of power distribution equipment, in particular to a low-voltage switch cabinet.

Background

High tension direct current becomes low-voltage alternating current after the processing of transformer, and the low-voltage switchgear is used for distributing the effect with the alternating current after handling, causes each circuit to can both carry out the circular telegram behind the low-voltage switchgear, also protects its equipment power consumption simultaneously, guarantees that equipment can the safe operation, is the indispensable distribution equipment of modernized society distribution.

The existing low-voltage switch cabinet is generally provided with fuses for preventing short circuit from causing safe operation of the switch cabinet and power distribution equipment, the power distribution equipment is protected by utilizing the principle that circuit current is suddenly increased to heat up due to sudden short circuit, but most fuses are disposable appliances, and need to be replaced after the fuses are burnt out, the fuses can be burnt out under the condition that the voltage is not stable enough, the fuses are easy to misjudge the circuit short circuit condition of a user due to burning out of incoming and outgoing calls, and the user can do useless work.

The existing low-voltage switch cabinet adopts a fuse method to carry out short-circuit detection and power-off, the fuse needs to be replaced after being burnt out, the use cost caused by the first low-voltage switch cabinet is high, the second low-voltage switch cabinet is more troublesome to use due to replacement, the existing low-voltage switch cabinet does not have the short-circuit alarming function, if a plurality of power distribution cabinets are placed in a power distribution room, the power distribution room can be powered off only if one power distribution cabinet is burnt out due to short circuit, the alarm can not be carried out on the power distribution cabinet, a user needs to investigate the power distribution cabinet, and the operation of rush repair work of the user is not facilitated in time.

Disclosure of Invention

In order to overcome the above defects in the prior art, the present invention provides a low voltage switch cabinet to solve the above problems in the background art.

The invention provides the following technical scheme: a low-voltage switch cabinet comprises a main body structure, wherein the main body structure comprises a cabinet body, a space is arranged in the cabinet body, a supporting plate is fixedly connected to the middle part and the bottom of the top of the inner surface of the cabinet body, a power inlet is fixedly connected to the middle part of the front part of the supporting plate at the top, a power switch is arranged at the top of the back part of the other side of the cabinet body, a battery jar is arranged at the bottom of the power switch, a disconnecting structure is arranged outside the power switch and comprises a disconnecting switch, two sides of the disconnecting switch are provided with a live wire, the other side of the live wire is provided with a rubber fixing disc, the other side of the live wire is fixedly connected with three plug blocks, the top and the bottom of the middle part of the rubber fixing disc are provided with two fixing bolts, the front part of the three plug blocks is provided with a connecting block, the bottoms of the two live wires are fixedly connected with an electromagnetic circuit, the other ends of the electromagnetic circuit are fixedly connected with an electromagnet, one side of the bottom of the disconnecting switch is provided with a reset plate, the bottom of the reset plate is fixedly connected with a reset spring, one side of the connecting block is provided with a round-head-connected with a disconnecting switch, one side of a protecting column is connected with a round-head-connected with a disconnecting switch, and the other side of the connecting block is connected with a round-head-connected with a protecting column-connected iron core, the utility model discloses a safety protection device, including protective housing's internal surface, rubber connection post, first gasket, second gasket, door plant structure, warning structure, door plant structure, protection housing's internal surface is equipped with the screw thread, one side of protective housing is equipped with the rubber connection post, the opposite side of rubber connection post surface is equipped with the screw thread, the surface of rubber connection post opposite side is seted up three groove and the inslot and all is equipped with first gasket, and is three the opposite side of first gasket all is equipped with the second gasket, the opposite side of second gasket all is equipped with the gasket tie bolt, the bottom of disconnection structure is equipped with the alarm structure, the front portion of major structure is equipped with the door plant structure.

Further, the alarm structure comprises an alarm lamp, the bottom of the alarm lamp is fixedly connected with a connecting column, the bottom of the connecting column is fixedly connected with an alarm circuit, two ends of the alarm circuit are connected with an alarm battery, and a battery baffle is arranged on the other side of the alarm battery; the middle part fixedly connected with of opposite side dials the movable block, the door plant structure includes the door plant, the anterior top of door plant is equipped with three instrument, the opposite side fixedly connected with door plant handle in the anterior middle part of door plant, the anterior one side fixedly connected with of door plant has three hinge.

Furthermore, switch size and rubber fixed disk size looks adaptation, and in the switch that two gim pegs were seted up through the top of the fixed rubber fixed disk of rubber fixed disk and the cabinet body opposite side back, three trench position that the inserted block position was seted up with the surface of rubber spliced pole opposite side is the same, three backup pad length and the internal surface width looks adaptation of cabinet, the magnetic force that the electro-magnet normally switched on brought is less than the elasticity that reset spring brought.

Furthermore, the disconnected antithetical couplet shell material is the insulator that does not conduct, the diameter of rubber dish and the diameter looks adaptation of the groove of seting up in disconnected antithetical couplet shell inside, the shape of connecting the button head is the ball type, the middle part of one side of route post is seted up slottedly and the degree of depth in groove and the outstanding length ratio of route iron core are three to one.

Furthermore, two the magnet gim peg passes through magnet to be fixed in the bottom of disconnected antithetical couplet shell, the diameter of protecting sheathing internal surface is the same with protecting sheathing surface diameter, the screw thread of protecting sheathing internal surface and the screw thread looks adaptation of rubber connection post surface opposite side.

Furthermore, the alarm structure is in a circuit breaking state under the condition of no short circuit, the poking block can poke the battery baffle to be opened, and the area ratio of the battery baffle to the battery groove is five to four.

Furthermore, the front parts of the three hinges are welded to one side of the front part of the door plate, the back parts of the other sides of the three hinges are welded to the front part of one side of the cabinet body, and the area size of the door plate is the same as that of the cabinet body.

The invention has the technical effects and advantages that:

1. according to the invention, through the arrangement of the disconnecting structure, when equipment is short-circuited, the current in a circuit can be increased through the electromagnet, so that the magnetic force generated by the electromagnet is increased, the electromagnet is matched with the disconnecting switch to carry out current disconnection treatment, and the resistance caused by the electromagnet can be ignored, so that the current can be timely disconnected to the disconnecting equipment, the normal work of the equipment under normal current is not hindered, when the current fluctuates, the equipment cannot be disconnected due to fine fluctuation as long as the current is not disconnected, the equipment cannot be disconnected due to fine fluctuation, the equipment is prevented from being frequently disconnected due to fluctuation and can be replaced by a fuse to carry out power-off work, the resetting operation can be recorded after the maintenance is finished, the follow-up replacement of the fuse by a user is reduced, the use cost is saved, the replacement is also avoided, and the use is convenient for the user.

2. The alarm structure is arranged, so that the alarm structure can form a passage when the disconnecting switch moves downwards during short circuit, the equipment can give an alarm, a user can rapidly carry out emergency repair work on the equipment, and the use safety of the equipment is protected.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the main structure of the present invention.

Fig. 3 is a cross-sectional view of a broken-away structure of the present invention.

Fig. 4 is a cross-sectional view of the structure of the on-off switch of the present invention.

Fig. 5 is a schematic view of the connecting block structure of the invention.

Fig. 6 is a cross-sectional view of an alarm structure of the present invention.

FIG. 7 is a cross-sectional view of a door panel structure according to the present invention.

The reference signs are: 1. a body structure; 101. a cabinet body; 102. a support plate; 103. a power switch; 104. A battery case; 105. an electric inlet; 2. a disconnect structure; 201. a connection and disconnection switch; 202. a live line; 203. an electromagnetic circuit; 204. a reset plate; 205. a poking plate; 206. an electromagnet; 207. connecting blocks; 208. a rubber fixing disc; 209. a fixing bolt; 210. inserting a block; 211. a return spring; 2011. a via plate; 2012. ejecting a spring; 2013. a disconnect housing; 2014. a rubber disc; 2015. a via core; 2016. a magnet; 2017. A magnet fixing bolt; 2018. a via post; 2019. connecting a round head; 2071. a protective housing; 2072. a rubber connecting column; 2073. a first gasket; 2074. a second gasket; 2075. a gasket connecting bolt; 3. an alert structure; 301. an alarm light; 302. connecting columns; 303. an alarm circuit; 304. an alarm battery; 305. a battery baffle; 306. a shifting block; 4. a door panel structure; 401. a door panel; 402. a meter; 403. a door panel handle; 404. and (5) a hinge.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and the forms of the structures described in the following embodiments are merely examples, and the low voltage switchgear according to the present invention is not limited to the structures described in the following embodiments, and all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, 2, 3, 4 and 5, the invention provides a low-voltage switch cabinet, the main structure 1 comprises a cabinet body 101, a space is arranged inside the cabinet body 101, the middle part and the bottom of the top of the inner surface of the cabinet body 101 are both fixedly connected with a support plate 102, the middle part of the front part of the top support plate 102 is fixedly connected with an electricity inlet 105, the top of the back of the other side of the cabinet body 101 is provided with a power switch 103, the bottom of the power switch 103 is provided with a battery jar 104, the outside of the power switch 103 is provided with a disconnecting structure 2, the disconnecting structure 2 comprises a connecting and disconnecting switch 201, both sides of the connecting and disconnecting switch 201 are provided with live wires 202, the other side of the live wires 202 is provided with a rubber fixing disk 208, the other side of the rubber fixing disk 208 is fixedly connected with three insertion blocks 210, the top and the bottom of the middle part of the rubber fixing disk 208 are provided with two fixing bolts 209, and the front parts of the three insertion blocks 210 are provided with a connecting block 207, the bottom of each live wire 202 is fixedly connected with an electromagnetic circuit 203, the other end of each electromagnetic circuit 203 is fixedly connected with an electromagnet 206, one side of the bottom of each disconnecting switch 201 is provided with a reset plate 204, the bottom of each reset plate 204 is fixedly connected with a reset spring 211, one side of each reset spring 211 is provided with a toggle plate 205, each disconnecting switch 201 comprises a disconnecting shell 2013, the inside of each disconnecting shell 2013 is provided with a groove, the middle part of one side of each disconnecting shell 2013 is fixedly connected with a passage board 2011, the middle part of the other side of each passage board 2011 is fixedly connected with a passage iron core 2015, the other side of each passage iron core 2015 is movably sleeved with a passage column 2018, one side of each passage column 2018 is fixedly connected with a passage iron core 2015, one side of a rubber disc 2014 is fixedly connected with an ejection spring 2012, the bottom of each disconnecting shell 2013 is provided with a magnet 2016, two sides of the bottom of each magnet are respectively provided with a magnet fixing bolt 2017, the other side of each passage column 2018 is fixedly connected with a round head 2019, connecting block 207 includes protecting sheathing 2071, protecting sheathing 2071's internal surface is equipped with the screw thread, one side of protecting sheathing 2071 is equipped with rubber connection pole 2072, the opposite side of rubber connection pole 2072 surface is equipped with the screw thread, three groove has been seted up to the surface of rubber connection pole 2072 opposite side, three inslot all is equipped with first gasket 2073, three first gasket 2073's opposite side all is equipped with second gasket 2074, second gasket 2074's opposite side all is equipped with gasket tie bolt 2075, disconnection structure 2's bottom is equipped with alarm structure 3, major structure 1's front portion is equipped with door plant structure 4.

What need specifically explain in this embodiment is, can make it increase the produced magnetic force increase of its electro-magnet 206 of circuit internal current when equipment is short circuited through being equipped with electro-magnet 206, cooperation even break switch 201 carries out the electric current with it and opens circuit the processing, and the resistance that the electro-magnet caused can be ignored, make its timely cut off the power supply to its circuit breaking device, do not hinder equipment normal work under normal current, when the electric current appears undulant, as long as not opening circuit, tiny fluctuation can not cut off the power supply to its equipment, prevent to cause the equipment frequently to cut off the power supply because of the fluctuation.

Referring to fig. 6 and 7, the warning structure 3 includes a warning lamp 301, a connection post 302 is fixedly connected to the bottom of the warning lamp 301, a warning circuit 303 is fixedly connected to the bottom of the connection post 302, a warning battery 304 is connected to both ends of the warning circuit 303, and a battery baffle 305 are disposed on the other side of the warning battery 304; the middle part fixedly connected with of opposite side dials piece 306, and door plant structure 4 includes door plant 401, and the anterior top of door plant 401 is equipped with three instrument 402, the opposite side fixedly connected with door plant handle 403 of the anterior middle part of door plant 401, the anterior one side fixedly connected with three hinge 404 of door plant 401.

In this embodiment, it should be specifically described that the alarm structure 3 is provided to enable the alarm structure 3 to form a path when the disconnecting switch 201 moves downward when the short circuit occurs, so that the device can alarm, and a user can rapidly perform emergency repair work on the device.

Referring to fig. 2 and 3, the size of the power switch 103 is matched with that of the rubber fixing disc 208, the two fixing bolts 209 are fixed in the power switch 103 formed on the rubber fixing disc 208 and the top of the back of the other side of the cabinet 101 through the rubber fixing disc 208, the positions of the three insertion blocks 210 are the same as the positions of the three grooves formed on the outer surface of the other side of the rubber connecting column 2072, the lengths of the three supporting plates 102 are matched with the width of the inner surface of the cabinet 101, and the magnetic force caused by normal energization of the electromagnet 206 is smaller than the elastic force caused by the return spring 211.

In this embodiment, it should be specifically noted that, under normal conditions, the magnetic force caused by the energization of the electromagnet 206 is smaller than the elastic force caused by the return spring 211, so that it can be prevented that the electromagnet 206 is energized to generate a magnetic force to attract the disconnection switch 201 to drop, which causes disconnection of the line.

Referring to fig. 4, the disconnection housing 2013 is made of a non-conductive insulator, the diameter of the rubber disc 2014 is matched with the diameter of a groove formed in the disconnection housing 2013, the connection round head 2019 is spherical, the middle of one side of the passage column 2018 is provided with the groove, and the ratio of the depth of the groove to the protruding length of the passage iron core 2015 is three to one.

In this embodiment, it should be specifically noted that the connecting round head 2019 is shaped like a sphere, which can help the on-off switch 201 to move under the magnetic force when short circuit occurs, so that the on-off switch 201 can sink to the position of the alarm structure 3 to make the alarm structure 3 think of a path alarm.

Referring to fig. 5, the two magnet fixing bolts 2017 are fixed to the bottom of the disconnecting casing 2013 through the magnet 2016, the diameter of the inner surface of the protective casing 2071 is the same as that of the outer surface of the protective casing 2071, and the thread of the inner surface of the protective casing 2071 is matched with the thread of the other side of the outer surface of the rubber connecting column 2072.

In this embodiment, it should be specifically noted that the magnet fixing bolt 2017 is fixed at the bottom of the disconnecting housing 2013 through the magnet 2016, so that the magnet can be fixed to help the disconnecting housing 2013 sink, and the diameter of the inner surface of the protective housing 2071 is the same as the diameter of the outer surface of the protective housing 2071, so that the protective housing 2071 can be connected to the outer surface of the rubber connecting column 2072, thereby protecting the wiring safety.

Referring to fig. 6, the alarm structure 3 is in the open circuit condition without a short circuit, the toggle block 306 can toggle the battery shutter 305 to open, and the ratio of the area of the battery shutter 305 to the area of the battery well 104 is five to four.

It should be specifically described in this embodiment that, the alarm structure 3 is in an open circuit state when there is no short circuit, so as to ensure that the alarm structure 3 does not give an alarm under the normal voltage condition, thereby ensuring that a user is safe to use.

Referring to fig. 7, the front portions of the three hinges 404 are welded to one side of the front portion of the door panel 401, the back portions of the other sides of the three hinges 404 are welded to the front portion of one side of the cabinet 101, and the area size of the door panel 401 is the same as the area size of the cabinet 101.

In this embodiment, it should be specifically described that the hinge 404 can be fixedly connected to the surface of the door panel 401 by welding the front portion of the hinge 404 to the front side of the door panel 401, so that the door panel 401 can be opened and closed safely, and the back portion of the other side of the hinge 404 can be welded to the front portion of one side of the cabinet 101, so that the door panel can be connected firmly, and the safety of the operation of the device can be ensured.

The working principle of the invention is as follows: firstly, the outer surface of three wire ends is peeled off, the three wire ends are pressed in a rubber connecting column 2072 through matching of a first gasket 2073, a second gasket 2074 and a gasket connecting bolt 2075, then a protective shell 2071 is connected to the outer surface of the rubber connecting column 2072 in a rotating mode, the wire ends are protected, the rubber connecting column 2072 is inserted into a power switch 103 to electrify the equipment, the equipment is electrified through an internal wire end, when the interior of a low-voltage cabinet or a connected circuit is short-circuited, the current in the circuit is instantly increased to instantly increase the current in a live wire 202, the current in the live wire 202 is instantly increased to instantly increase the current in the electromagnetic circuit 203 connected to the bottom of the live wire 202, the current in the electromagnetic circuit 203 is increased to increase the magnetic force generated by an electromagnet 206, the magnetic force of the electromagnet 206 is greater than the elastic force of a reset spring 211 to attract the magnet to move downwards, the magnet 2016 moves downwards to drive the reset plate 204 to move downwards, the reset plate 204 moves downwards to compress the reset spring 211, the magnet 2016 moves downwards to drive the disconnected shell 3 to move downwards, the disconnected rubber disc 2016 and move 2014 to push the rubber disc to disconnect the rubber disc 201202, and the 2014 moves to disconnect the rubber disc, so that the rubber disc 2014 moves to disconnect the rubber disc 202 and the rubber disc is disconnected circuit.

When the on-off switch 201 moves to the bottommost part, the passage post 2018 and the connection round head 2019 are ejected and fixed, so that the alarm circuit 303 forms a passage, the alarm lamp 301 gives an alarm to remind people of going forward to perform troubleshooting, after the troubleshooting is finished, the door panel handle 403 is clenched to open the door panel 401, the toggle plate 205 is pushed upwards to drive the reset plate 204 to move upwards, the reset plate 204 moves upwards to drive the on-off switch 201 to move upwards, and after the on-off switch 201 leaves the clamping groove position, the reset spring 211 is not forced to eject to reset.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. A low-voltage switchgear cabinet, includes major structure (1), its characterized in that still includes: the multifunctional electric heating cabinet comprises a main body structure (1), wherein the main body structure (1) comprises a cabinet body (101), a space is formed in the cabinet body (101), a supporting plate (102) is fixedly connected to the middle of the top and the bottom of the inner surface of the cabinet body (101), the top of the inner surface of the cabinet body (101) is fixedly connected to the front middle of the supporting plate (102), a power switch (103) is arranged at the top of the back of the other side of the cabinet body (101), a battery groove (104) is formed in the bottom of the power switch (103), a disconnecting structure (2) is arranged outside the power switch (103), the disconnecting structure (2) comprises a disconnecting switch (201), a live wire (202) is arranged on two sides of the disconnecting switch (201), a rubber fixing disc (208) is arranged on the other side of the live wire (202), three inserting blocks (210) are fixedly connected to the other side of the rubber fixing disc (208), two fixing bolts (209) are arranged on the top and the bottom of the middle of the rubber fixing disc (208), connecting blocks (207) are arranged on the front portions of the three inserting blocks (210), an electromagnetic circuit (203) is fixedly connected to the bottom of the two live wires (202), an electromagnetic circuit (203), a reset plate (206) is arranged on one side of the other electromagnetic circuit (206), and a reset plate (204) is arranged on one side of the electromagnet (206) is arranged on one side of the electromagnet (204), the bottom fixedly connected with reset spring (211) of reset plate (204), one side of reset spring (211) is equipped with dials board (205), even disconnected switch (201) is including disconnected antithetical couplet shell (2013), the inside of disconnected antithetical couplet shell (2013) is seted up slottedly, middle part fixedly connected with passageway board (2011) of disconnected shell (2013) one side, the middle part fixedly connected with passageway iron core (2015) of passageway board (2011) opposite side, the opposite side activity cover of passageway iron core (2015) has passageway post (2018), one side fixedly connected with rubber disc (2014) of passageway post (2018), the ejecting spring (2012) of one side fixedly connected with of rubber disc (2014), the bottom of disconnected shell (2013) is equipped with magnet (2017), the both sides of magnet (2016) bottom all are equipped with magnet gim peg (2017), the opposite side fixedly connected with of passageway post (2018) is connected with connection stud (2014) 9), connecting block (207) is including protection shell (2011), the internal surface of protection shell (2071) is equipped with screw thread 2071, the internal surface of protection shell (2071) is equipped with the rubber gasket (2072), the outer surface of protection shell (2072) is equipped with the rubber groove (2072), the rubber gasket (2072) in one side of connection post (2072), the rubber groove (2072) is equipped with the first rubber groove (2072), the opposite side of three first gasket (2073) all is equipped with second gasket (2074), the opposite side of second gasket (2074) all is equipped with gasket connecting bolt (2075), the bottom of disconnection structure (2) is equipped with alarm structure (3), the front portion of major structure (1) is equipped with door plant structure (4).

2. The low-voltage switchgear cabinet according to claim 1, characterized in that: the alarm structure (3) comprises an alarm lamp (301), the bottom of the alarm lamp (301) is fixedly connected with a connecting column (302), the bottom of the connecting column (302) is fixedly connected with an alarm circuit (303), two ends of the alarm circuit (303) are connected with an alarm battery (304), the other side of the alarm battery (304) is provided with a battery baffle (305), and the battery baffle (305) is arranged on the other side of the alarm battery (304); the middle part of opposite side fixedly connected with dials piece (306), door plant structure (4) are including door plant (401), the top of door plant (401) front portion is equipped with three instrument (402), the opposite side fixedly connected with door plant handle (403) of door plant (401) front portion middle part, three hinge (404) of one side fixedly connected with of door plant (401) front portion.

3. The low-voltage switchgear cabinet according to claim 1, characterized in that: switch (103) size and rubber fixed disk (208) size looks adaptation, and in switch (103) that two gim peg (209) were seted up through rubber fixed disk (208) fixed rubber fixed disk (208) and the top of the cabinet body (101) opposite side back, it is three trench position that plug block (210) position and the surface of rubber connecting post (2072) opposite side were seted up is the same, three backup pad (102) length and the internal surface width looks adaptation of cabinet body (101), the magnetic force that electro-magnet (206) brought in normal circular telegram is less than the elasticity that reset spring (211) brought.

4. The low-voltage switchgear cabinet according to claim 1, characterized in that: the material of the disconnected joint shell (2013) is a non-conductive insulator, the diameter of the rubber disc (2014) is matched with the diameter of a groove formed in the disconnected joint shell (2013), the connecting round head (2019) is spherical, a groove is formed in the middle of one side of the passage column (2018), and the ratio of the depth of the groove to the protruding length of the passage iron core (2015) is three to one.

5. A low-voltage switchgear, according to claim 1, characterized in that: the two magnet fixing bolts (2017) are fixed at the bottom of the disconnecting shell (2013) through magnets (2016), the diameter of the inner surface of the protective shell (2071) is the same as that of the outer surface of the protective shell (2071), and the threads of the inner surface of the protective shell (2071) are matched with the threads of the other side of the outer surface of the rubber connecting column (2072).

6. A low-voltage switchgear cabinet according to claim 2, characterized in that: the alarm structure (3) is in a circuit breaking state under the condition that no short circuit exists, the poking block (306) can poke the battery baffle (305) to open, and the area ratio of the battery baffle (305) to the battery groove (104) is five to four.

7. A low-voltage switchgear, according to claim 2, characterized in that: the front parts of the three hinges (404) are welded to one side of the front part of the door panel (401), the back parts of the other sides of the three hinges (404) are welded to the front part of one side of the cabinet body (101), and the area size of the door panel (401) is the same as that of the cabinet body (101).

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