CN214429078U

CN214429078U - Novel switch cabinet

Info

Publication number: CN214429078U
Application number: CN202023181213.9U
Authority: CN
Inventors: 郑刘亮; 木林森; 温科; 郑雪婷
Original assignee: Murge Electric Co ltd
Current assignee: Murge Electric Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-10-19
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a novel switch cabinet, including the cabinet body, the internal generating line room, cable chamber that is equipped with of cabinet, load switch are located the generating line room, and branch's mother is located the cable chamber, is equipped with instrument box and control box on the cabinet body, is equipped with operating device in the control box, and load switch is connected with the female row of operating device and branch respectively, and operating device control load switch's isolation operation and ground connection operation, the utility model discloses well frame adopts stand splint structural style, and complete machine structural rigidity is good, and convenient assembling, size precision easily guarantees, and it is inside with all key transmission cladding, carries out both ends support location, the utility model discloses a main switch operating axis can be through electronic or manual mode drive, and electronic drive structure and manual drive structure can not interfere each other, and application scope is wider.

Description

Novel switch cabinet

Technical Field

The utility model belongs to the electrical equipment field relates to a novel cubical switchboard.

Background

The cubical switchboard is at power system's in-process that generates electricity, transmits electricity, distribution and electric energy conversion, open and shut, the consumer of control and protection, inner structure is various and complicated, therefore need the cubical switchboard bulky, and the cubical switchboard is of a great variety, if can divide into withdrawable switch cabinet and fixed cubical switchboard according to the circuit breaker mounting means, according to the difference of cabinet body structure, can divide into open-type cubical switchboard, metal-enclosed switch cabinet and metal-enclosed armor formula cubical switchboard etc. and then along with the cubical switchboard application scope wider, the whole manufacturing cost is higher, and the simultaneous operation stability is low, the utility model discloses this kind of problem has been solved effectively.

Disclosure of Invention

The utility model discloses an overcome prior art not enough, provide a novel cubical switchboard.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a novel switch cabinet is characterized in that: including the cabinet body, the internal generating line room, the cable chamber that are equipped with of cabinet, load switch are located the generating line room, and the branch is female to be located the cable chamber, is equipped with instrument box and control box on the cabinet body, is equipped with operating device in the control box, and load switch is female to be connected with operating device and branch respectively, and operating device controls load switch's isolation operation and ground connection operation, operating device includes the frame, the frame includes upper cover plate, lower apron and frame mounting panel, upper cover plate, lower apron and frame mounting panel parallel arrangement, and through location support post fixed connection.

Further, the method comprises the following steps of; the cabinet body has set firmly first installed part and second installed part, and first installed part and second installed part set up to two sets of symmetry, and first installed part vertically installs to the cabinet body, and the second installed part transversely installs the cabinet body, and the cable chamber side is provided with the cable cabinet door with cabinet body coupling, sets firmly the cabinet door handle that is used for the push-and-pull on the cable cabinet door, is used for the viewing aperture of observation and is used for the data plate of sign.

Further, the method comprises the following steps of; the instrument box is located above the operation box.

Further, the method comprises the following steps of; the operating mechanism comprises a spring energy storage device, a buckling and locking device, a first interlocking device and a second interlocking device, the spring energy storage device stores energy, the first interlocking device controls the grounding switch which cannot be operated after the load switch is switched on, and the second interlocking device controls the opening time of the cable cabinet door.

Further, the method comprises the following steps of; the spring energy storage device is positioned between the grounding switch operating device and the main switch operating device and is respectively connected with the grounding switch operating device and the main switch operating device; the main switch shaft is manually or mechanically rotated to drive the spring energy storage device to store energy, and the spring energy storage device rotates through the maximum energy storage position to release the stored energy to enable the main switch operating device to continue rotating.

Further, the method comprises the following steps of; the spring energy storage device is positioned between an upper cover plate and a lower cover plate of the rack and comprises a pressure spring, a first pressure spring head and a second pressure spring head, the first pressure spring head and the second pressure spring head are connected through a telescopic rod, the pressure spring is sleeved on the telescopic rod, a first spring crank arm is fixedly arranged on the outer surface of a grounding shaft of the grounding switch operating device, the first pressure spring head is rotatably connected with the first spring crank arm, a second spring crank arm is fixedly arranged on the outer surface of a main switch shaft of the main switch operating device, the second pressure spring head is rotatably connected with the second spring crank arm, and when the grounding switch operating device rotates, the first pressure spring head is driven to compress the pressure spring to store energy; when the main switch operating device rotates, the second pressure spring head is driven to compress the pressure spring for storing energy.

Further, the method comprises the following steps of; the three-station cam transmission device comprises a grounding connecting lever part, a cam disc, a closing connecting lever part, a first transmission connecting lever, a second transmission connecting lever and a connecting rod welding part, wherein the grounding connecting lever part and the first transmission connecting lever are fixedly arranged on the outer surface of a grounding shaft, the closing connecting lever part and the second transmission connecting lever are arranged on the outer surface of a main switch shaft, a second arc groove is fixedly arranged on the closing connecting lever part and corresponds to a pin shaft on a second spring connecting lever, the radian and the arc length of the second arc groove are matched with the pin shaft along with the rotation range of the second spring connecting lever, and the cam disc is connected with a load switch through a switch main shaft.

Further, the method comprises the following steps of; the padlock device includes the buckle and with buckle and lower cover connection's connecting piece, has set firmly the folded plate on the buckle, and the angle that folded plate and buckle become matches with the location support post surface radian that corresponds, is connected with the padlock spring between connecting piece and electronic turning arm, and the motor drives the connecting rod rebound, and folded plate and buckle offset with the location support post and carry out the padlock operation.

Further, the method comprises the following steps of; the frame is provided with a motor, an output shaft of the motor is fixedly connected with an electric crank arm, the outer end of the electric crank arm is rotatably connected with a connecting rod, the outer surface of a main switch shaft is fixedly provided with a rotating plate, an arc groove is fixedly arranged on the rotating plate, and a pin shaft of the second spring crank arm moves in the arc groove to prevent manual operation and electric operation from interfering; the second interlocking device is interlocked with the grounding switch operating device, a connecting crank arm is fixedly arranged on the outer surface of the grounding shaft, a moving groove and a push rod are fixedly arranged on the connecting crank arm, a pin shaft of the first spring crank arm moves in the moving groove to prevent movement interference, and the push rod pushes the second interlocking device to prevent the cable cabinet door from being opened mistakenly; a first pin is fixedly arranged on the first transmission crank arm, a second pin is fixedly arranged on the second transmission crank arm, a first sliding groove and a second sliding groove are respectively fixedly arranged on the lower cover plate, the first sliding groove and the second sliding groove are respectively connected with the first pin and the second pin in a sliding manner, a moving groove and a hook groove are fixedly arranged on the cam disc, the first pin penetrates through the first sliding groove and moves in the moving groove, the second pin penetrates through the second sliding groove and enters or is separated from the hook groove, the closing crank arm part rotates left and right to drive the cam disc to rotate left and right, and the state from the grounding position to the isolation position is switched to the closing position; the cam disc transmits a switch state signal to the signal shaft through the connecting rod weldment and the auxiliary switch crank arm so as to drive the auxiliary switch signal and mechanical signal switching and the measurement of characteristic parameters; the three groups of branch busbars are vertically distributed in parallel, and the distribution direction of the branch busbars is consistent with the length direction of the cabinet body.

To sum up, the utility model discloses an useful part lies in:

1. the utility model discloses the middle rack adopts stand splint structural style, and complete machine structural rigidity is good, convenient assembling, and size precision easily guarantees, inside all key transmission cladding, carries out both ends and supports the location.

2. The middle switching-on/switching-off grounding three-station cam transmission device of the utility model concentrates the motion of the switching-on connecting lever part and the grounding connecting lever part on the cam disc, so that the actions at different positions are transmitted to the switch main shaft; the transmission torque curve of the spring release winding main shaft is changed through fitting of the moving groove and the hook groove curve of the cam disc, so that the transmission torque curve meets the force output characteristics required by the switch main shaft, and the main shaft is driven to carry out the opening and closing operations of the load switch and the grounding switch.

3. The utility model discloses in design first interlock and second interlock, can make load switch switching-on back inoperable earthing switch through first interlock, just allow to open the cable cabinet door when only earthing switch switches on through the second interlock, improve the security.

4. The utility model discloses a main switch operation axle can be through electronic or manual mode drive, and electronic drive structure and manual drive structure can not mutual interference, and application scope is wider.

Drawings

Fig. 1 is a front view of the device of the present invention.

Fig. 2 is a right side view of the device of the present invention.

Fig. 3 is a schematic view of the operating mechanism of the present invention.

Fig. 4 is a schematic view of the middle frame of the present invention.

Fig. 5 is an internal schematic view of the middle operating mechanism of the present invention.

Fig. 6 is the schematic diagram of the three-position cam transmission device for switching on and off grounding of the utility model.

Detailed Description

In order to make the technical field personnel understand the utility model discloses the scheme, will combine the drawing in the embodiment of the utility model below, to the technical scheme in the embodiment of the utility model carries out clear, complete description.

All directional indicators (such as upper, lower, left, right, front, rear, horizontal, vertical … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, if the specific posture changes, the directional indicator changes accordingly.

As shown in fig. 1-6, a novel switch cabinet comprises a cabinet body 1, a bus chamber 12 and a cable chamber 13 are arranged in the cabinet body 1, a load switch 2 is located in the bus chamber 12, a branch busbar 6 is located in the cable chamber 13, an instrument box 14 and an operation box 15 are arranged on the cabinet body 1, the instrument box 14 is located above the operation box 15, an operation mechanism is arranged in the operation box 15, the load switch 2 is respectively connected with the operation mechanism and the branch busbar 6, and the operation mechanism controls the isolation operation and the grounding operation of the load switch 2.

The top surface and the side surface of the cabinet body 1 are respectively and fixedly provided with a first mounting part 111 and a second mounting part 112, the first mounting part 111 and the second mounting part 112 are arranged in two symmetrical groups, the first mounting part 111 is used for longitudinally mounting the cabinet body 1, the second mounting part 112 is used for transversely mounting the cabinet body 1, so that the stability of the cabinet body 1 after mounting is ensured, in the embodiment, the load switch 12 is a three-station three-phase load switch, three groups of branch busbars 6 are vertically and parallelly distributed, the distribution direction of the branch busbars 6 is consistent with the length direction of the cabinet body 1, the side surface of the cable chamber 13 is provided with a cable cabinet door 16 connected with the cabinet body 1, the cable cabinet door 16 is fixedly provided with a cabinet door handle 161 for pushing and pulling, an observation port 162 for observation and a signboard 163 for identification, and an observation plate made of transparent material, such as glass, a glass plate and a glass plate are arranged in the observation port 162, Inferior gram force board etc. still is provided with the pressure release case on the cabinet body 1, be provided with the pressure release hole (not shown) on the pressure release case, the pressure release hole communicates with bus-bar room 12 and cable chamber 13 respectively, and the passageway is independent each other after the intercommunication, and under equipment normal operating's state, the pressure release hole is provided with the pressure release metal sheet (not shown) with bus-bar room 12 and cable chamber 13 intercommunication position and seals.

Instrument box 14 and operation box 15 are located cable chamber 13 top and set firmly in generating line room 12 side, instrument box 14 is located operation box 15 top, instrument box 14 side has set firmly the vent of longitudinal symmetry, in this embodiment, the vent sets up to the loop configuration, and the ventilation cooling of being convenient for guarantees that temperature keeps at stable state in instrument box 14, avoids accelerated ageing under high temperature of components and parts, has improved the life of components and parts.

The operating mechanism comprises a frame 49, a spring energy storage device 41, a locking device 43, a first interlocking device 47 and a second interlocking device 48, wherein the spring energy storage device 41 stores energy, the first interlocking device 47 controls an inoperable grounding switch after a load switch is closed, and the second interlocking device 48 controls the opening time of the cable cabinet door 16.

The frame 49 includes upper cover plate 491, lower cover plate 492 and frame mounting panel 493, and upper cover plate 491, lower cover plate 492 and frame mounting panel 493 parallel arrangement, and through location support stand 494 fixed connection, frame 49 adopts stand splint structural style, improves the rigidity of complete machine structure, and convenient assembling, and size precision easily guarantees, inside with all key transmission cladding simultaneously, avoids appearing collision scheduling problem.

The frame 49 is provided with an earthing switch operating device and a main switch operating device, the spring energy storage device 41 is positioned between the earthing switch operating device and the main switch operating device and is respectively connected with the earthing switch operating device and the main switch operating device, the earthing switch operating device comprises an earthing shaft 496, the main switch operating device comprises a main switch shaft 497, an earthing hole 4911 and a main switch hole 4912 are fixedly arranged on an upper cover plate 491, one end of the earthing shaft 496 penetrates through the earthing hole 4911 and extends to the outer side of the upper cover plate 491, the earthing shaft 496 is manually or mechanically rotated, so that the spring energy storage device 41 is driven to store energy, and when the spring energy storage device 41 rotates to the maximum energy storage position, the stored energy is released to enable the earthing switch operating device to continue to rotate; the main switch shaft 497 is rotated manually or by a motor to drive the spring energy storage device 41 to store energy, and when the spring energy storage device 41 rotates past the maximum energy storage position, the stored energy is released to continue rotating the main switch operating device.

The spring energy storage device 41 is located between an upper cover plate 491 and a lower cover plate 492 of the rack 49, the spring energy storage device 41 comprises a pressure spring 411, a first pressure spring head 4111 and a second pressure spring head 4112, the first pressure spring head 4111 and the second pressure spring head 18 are connected through an expansion rod 4113, the pressure spring 411 is sleeved on the expansion rod 4113, a first spring crank arm (not shown) is fixedly arranged on the outer surface of a grounding shaft 496 of the grounding switch operating device, the first pressure spring head 4111 is rotatably connected with the first spring crank arm, a second spring crank arm (not shown) is fixedly arranged on the outer surface of a main switch shaft 497 of the main switch operating device, the second pressure spring head 4112 is rotatably connected with the second spring crank arm, and when the grounding switch operating device rotates, the first pressure spring head 4111 is driven to compress the pressure spring 411 so as to store energy; when the main switch operation device rotates, the second pressure spring head 4112 is driven to compress the pressure spring 411 to store energy.

The utility model also comprises a three-position cam transmission device 40 for grounding and opening the closing and opening brake, the three-position cam transmission device 40 for grounding and opening the closing and opening brake comprises a grounding crank arm part 406, a cam disc 403, a closing crank arm part 404, a first transmission crank arm 407, a second transmission crank arm 405 and a connecting rod welding piece 402, the grounding crank arm part 406 and the first transmission crank arm 407 are fixedly arranged on the outer surface of a grounding shaft 496, the closing crank arm part 404 and the second transmission crank arm 405 are arranged on the outer surface of a main switch shaft 497, wherein the cam disc 403 and the connecting rod welding piece 402 are positioned between a lower cover plate 492 and a rack mounting plate 493, a second arc groove is fixedly arranged on the closing crank arm part 404, the second arc groove corresponds to a pin shaft on a second spring crank arm 412, the radian and arc length of the second arc groove are matched with the pin shaft along with the rotation range of the second spring crank arm 412, namely when the three-position cam transmission device 40 for grounding and the closing and opening brake and the second spring arm 412 move, independent of each other, no interference occurs; the cam disk 403 is connected to the load switch 2 via a switch spindle.

A first pin 4071 is fixedly arranged on the first transmission crank arm 407, a second pin 4051 is fixedly arranged on the second transmission crank arm 405, a first sliding chute and a second sliding chute are respectively fixedly arranged on the lower cover plate 492, the first sliding chute and the second sliding chute are respectively connected with the first pin 4071 and the second pin 4051 in a sliding manner, a moving groove 4073 and a hook groove 4072 are fixedly arranged on the cam disc 403, the first pin 4071 penetrates through the first sliding chute and moves in the moving groove 4073, the second pin 4051 penetrates through the second sliding chute and enters or separates from the hook groove 4072, the cam disc 403 is driven to rotate left and right by the left and right rotation of the switching-on crank arm part 404, and the switching-on state from the grounding position to the isolation position to the switching-on position is switched; the cam plate 403 transmits switch status signals to the signal shaft 400 via the link weldment 402 and the auxiliary switch crank arm 409 to drive the auxiliary switch signal and mechanical signal switching and measurement of characteristic parameters.

In this embodiment, the three-position cam transmission device 40 for closing and opening the brake concentrates the motion of the closing crank arm part 404 and the grounding crank arm part 406 on the cam disc 403, so that the motions at different positions are transmitted to the switch main shaft; the curve of the transmission torque of the spring release around the main shaft is changed by fitting the curves of the moving groove 4073 and the hook groove 4072 of the cam disc 403, so that the curve meets the required output characteristic of the switch main shaft, and the main shaft is driven to perform the opening and closing operations of the load switch and the grounding switch.

The utility model discloses still include first interlock 47 and second interlock 48, first interlock 47 and second interlock 48 can adopt conventional technical scheme, can make load switch closing back inoperable earthing switch through first interlock 47, just allow to open cable cabinet door 16 when only earthing switch closes a floodgate through second interlock 48, improve the security.

The utility model discloses well second interlock 48 and earthing switch operating means linkage, particularly, earthing shaft 496 surface has set firmly connection turning arm 412, has set firmly shifting chute 4121 and push rod 4122 on the connection turning arm 412, and the round pin axle of first spring turning arm removes in shifting chute 4121, prevents that the motion from interfering, and push rod 4122 promotes second interlock 48, prevents that cable cabinet door 16 from opening by mistake, improves the security.

The utility model discloses in, the combined floodgate operation of main switch operating means can be realized through the electric mode, particularly, the apron 492 is equipped with the motor 42 under, fixedly connected with electric connecting lever 442 on the output shaft of motor 42, electric connecting lever 442's outer end is rotated and is connected with connecting rod 441, main switch axle 497 surface has set firmly commentaries on classics board 413, the arc groove 4131 has set firmly on the commentaries on classics board 413, the round pin axle of second spring connecting lever removes in arc groove 4131, prevent manually, electronic mutual interference, when motor 42 starts, the motor shaft drives electric connecting lever 442 and rotates, electric connecting lever 442 drives connecting rod 441 and rotates, follow-up drive mode is the same with manual drive.

The locking device 43 comprises a buckle plate 432 and a connecting piece 431 connecting the buckle plate 432 with the lower cover plate 492, a folded plate 4321 is fixedly arranged on the buckle plate 432, the angle formed by the folded plate 4321 and the buckle plate 432 is matched with the radian of the outer surface of a corresponding positioning support upright column 494, a locking spring (not shown) is connected between the connecting piece 431 and an electric connecting arm 442, when the closing operation of the main switch operating device is realized in an electric mode, the connecting rod 441 moves upwards, at the moment, the folded plate 4321 and the buckle plate 432 are abutted against the positioning support upright column 494 for locking operation, and the corresponding equipment state is further maintained.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Claims

1. A novel switch cabinet is characterized in that: including the cabinet body, the internal generating line room, the cable chamber that are equipped with of cabinet, load switch are located the generating line room, and the branch is female to be located the cable chamber, is equipped with instrument box and control box on the cabinet body, is equipped with operating device in the control box, and load switch is female to be connected with operating device and branch respectively, and operating device controls load switch's isolation operation and ground connection operation, operating device includes the frame, the frame includes upper cover plate, lower apron and frame mounting panel, upper cover plate, lower apron and frame mounting panel parallel arrangement, and through location support post fixed connection.

2. The novel switchgear cabinet as claimed in claim 1, wherein: the cabinet body has set firmly first installed part and second installed part, and first installed part and second installed part set up to two sets of symmetry, and first installed part vertically installs to the cabinet body, and the second installed part transversely installs the cabinet body, and the cable chamber side is provided with the cable cabinet door with cabinet body coupling, sets firmly the cabinet door handle that is used for the push-and-pull on the cable cabinet door, is used for the viewing aperture of observation and is used for the data plate of sign.

3. The novel switchgear cabinet as claimed in claim 1, wherein: the instrument box is located above the operation box.

4. The novel switchgear cabinet as claimed in claim 1, wherein: the operating mechanism comprises a spring energy storage device, a buckling and locking device, a first interlocking device and a second interlocking device, the spring energy storage device stores energy, the first interlocking device controls the grounding switch which cannot be operated after the load switch is switched on, and the second interlocking device controls the opening time of the cable cabinet door.

5. The novel switchgear cabinet as claimed in claim 4, wherein: the spring energy storage device is positioned between the grounding switch operating device and the main switch operating device and is respectively connected with the grounding switch operating device and the main switch operating device; the main switch shaft is manually or mechanically rotated to drive the spring energy storage device to store energy, and the spring energy storage device rotates through the maximum energy storage position to release the stored energy to enable the main switch operating device to continue rotating.

6. The novel switchgear cabinet as claimed in claim 4, wherein: the spring energy storage device is positioned between an upper cover plate and a lower cover plate of the rack and comprises a pressure spring, a first pressure spring head and a second pressure spring head, the first pressure spring head and the second pressure spring head are connected through a telescopic rod, the pressure spring is sleeved on the telescopic rod, a first spring crank arm is fixedly arranged on the outer surface of a grounding shaft of the grounding switch operating device, the first pressure spring head is rotatably connected with the first spring crank arm, a second spring crank arm is fixedly arranged on the outer surface of a main switch shaft of the main switch operating device, the second pressure spring head is rotatably connected with the second spring crank arm, and when the grounding switch operating device rotates, the first pressure spring head is driven to compress the pressure spring to store energy; when the main switch operating device rotates, the second pressure spring head is driven to compress the pressure spring for storing energy.

7. The novel switchgear cabinet as claimed in claim 4, wherein: the three-station cam transmission device comprises a grounding connecting lever part, a cam disc, a closing connecting lever part, a first transmission connecting lever, a second transmission connecting lever and a connecting rod welding part, wherein the grounding connecting lever part and the first transmission connecting lever are fixedly arranged on the outer surface of a grounding shaft, the closing connecting lever part and the second transmission connecting lever are arranged on the outer surface of a main switch shaft, a second arc groove is fixedly arranged on the closing connecting lever part and corresponds to a pin shaft on a second spring connecting lever, the radian and the arc length of the second arc groove are matched with the pin shaft along with the rotation range of the second spring connecting lever, and the cam disc is connected with a load switch through a switch main shaft.

8. The novel switchgear cabinet as claimed in claim 4, wherein: the padlock device includes the buckle and with buckle and lower cover connection's connecting piece, has set firmly the folded plate on the buckle, and the angle that folded plate and buckle become matches with the location support post surface radian that corresponds, is connected with the padlock spring between connecting piece and electronic turning arm, and the motor drives the connecting rod rebound, and folded plate and buckle offset with the location support post and carry out the padlock operation.

9. The novel switchgear cabinet as claimed in claim 4, wherein: the frame is provided with a motor, an output shaft of the motor is fixedly connected with an electric crank arm, the outer end of the electric crank arm is rotatably connected with a connecting rod, the outer surface of a main switch shaft is fixedly provided with a rotating plate, an arc groove is fixedly arranged on the rotating plate, and a pin shaft of the second spring crank arm moves in the arc groove to prevent manual operation and electric operation from interfering; the second interlocking device is interlocked with the grounding switch operating device, a connecting crank arm is fixedly arranged on the outer surface of the grounding shaft, a moving groove and a push rod are fixedly arranged on the connecting crank arm, a pin shaft of the first spring crank arm moves in the moving groove to prevent movement interference, and the push rod pushes the second interlocking device to prevent the cable cabinet door from being opened mistakenly; a first pin is fixedly arranged on the first transmission crank arm, a second pin is fixedly arranged on the second transmission crank arm, a first sliding groove and a second sliding groove are respectively fixedly arranged on the lower cover plate, the first sliding groove and the second sliding groove are respectively connected with the first pin and the second pin in a sliding manner, a moving groove and a hook groove are fixedly arranged on the cam disc, the first pin penetrates through the first sliding groove and moves in the moving groove, the second pin penetrates through the second sliding groove and enters or is separated from the hook groove, the closing crank arm part rotates left and right to drive the cam disc to rotate left and right, and the state from the grounding position to the isolation position is switched to the closing position; the cam disc transmits a switch state signal to the signal shaft through the connecting rod weldment and the auxiliary switch crank arm so as to drive the auxiliary switch signal and mechanical signal switching and the measurement of characteristic parameters; the three groups of branch busbars are vertically distributed in parallel, and the distribution direction of the branch busbars is consistent with the length direction of the cabinet body.