Substation electrical secondary loop line connection auxiliary device

By using limiting and fixing mechanisms, the problem of wire entanglement in the electrical secondary circuit connection device of the substation is solved, achieving stable fixing and safe heat dissipation of the lines, and improving operational safety and maintenance efficiency.

CN121484764APending Publication Date: 2026-02-06QINGHAI ELECTRIC POWER DESIGN INST
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Patent Information

Application Number
CN202511715578.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-21
Publication Date
2026-02-06

AI Technical Summary

Technical Problem

The existing auxiliary devices for connecting electrical secondary circuits in substations lack effective limiting measures, which makes the lines prone to crossing and tangling, affecting the aesthetics and increasing the difficulty of maintenance and repair.

Method used

A limiting mechanism is adopted, including a fixed plate, a limiting rod, a moving block, a cylinder, a telescopic rod, a movable rod, and an arc-shaped clamping rod. The telescopic rod and the movable rod are extended and retracted by the cylinder to prevent the wires from getting tangled. Combined with the fixing mechanism and the heat dissipation mechanism, the stability and safety of the wires are ensured.

Benefits of technology

It effectively prevents wire tangling, improves operational safety and maintenance efficiency, ensures clear wiring layout, reduces accident risks, and enhances the stability and safety of the device.

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Abstract

The invention relates to the technical field of transformer substations, in particular to a transformer substation electrical secondary circuit line connection auxiliary device which comprises a connection cabinet, a limiting mechanism is arranged in the connection cabinet and comprises fixing plates, the fixing plates are arranged in the connection cabinet in parallel, and the tops of the fixing plates are slidably connected with moving blocks. A limiting frame is connected to the top of the moving block, an air cylinder is fixedly connected to the interior of the limiting frame, a lifting block is connected to the upper end of the telescopic rod in a penetrating mode, two supporting rods are hinged to the lifting block, movable rods are rotationally connected to the two ends of the top of the limiting frame, and arc-shaped clamping rods are arranged on the inner walls of the upper ends of the movable rods; the end, away from the lifting block, of the supporting rod is fixedly connected with the movable rod. According to the invention, the limiting mechanism is arranged to limit the line in the device, so that the line is prevented from being knotted and wound, the cable layout is ensured to be clear during maintenance, and the operation safety and the operation and maintenance efficiency are improved.
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Description

Technical Field

[0001] This application relates to the field of substation technology, and in particular to an auxiliary device for connecting electrical secondary circuit lines in a substation. Background Technology

[0002] Substation electrical secondary circuit connection auxiliary devices are a series of equipment and tools designed to ensure the safe, efficient, and accurate connection of secondary circuit lines. Through different types of devices such as anti-conductor contact auxiliary brackets and terminal block auxiliary connection devices, they play the roles of fixing, connecting, conducting, protecting, and assisting in drawing reference. They can optimize the secondary circuit wiring process, reduce the operational risks for operators, improve the quality of line connections and work efficiency, and ensure the stable and reliable operation of substation electrical secondary circuits.

[0003] Existing auxiliary devices for connecting secondary electrical circuits in substations lack effective limiting measures, making it easy for lines to cross or become tangled. This not only makes the layout of secondary circuits appear messy and affects the overall aesthetics, but more importantly, it increases the difficulty of subsequent maintenance and repair work. When staff are locating specific lines or troubleshooting faults, they may spend a lot of time and energy due to the chaotic wiring, and may even make misjudgments or miss problems. Summary of the Invention

[0004] The purpose of this application is to provide an auxiliary device for connecting electrical secondary circuit lines in substations to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A substation electrical secondary circuit connection auxiliary device includes a connection cabinet with a cover plate hinged to the top of the connection cabinet. The device also includes a limiting mechanism, which includes multiple fixing plates that are parallel to each other and spaced apart inside the connection cabinet. The fixing plates are fixedly connected to the bottom of the connection cabinet.

[0007] Inside the connecting cabinet, several evenly arranged limiting rods are distributed on both sides of each fixed plate. The limiting rods are fixedly connected to the connecting cabinet. A moving block is slidably connected to the top of each fixed plate. Connecting plates are fixedly connected to both sides of the moving block. Each connecting plate has a limiting hole that matches the limiting rod. In use, the limiting rod passes through the limiting hole, and the periphery of the limiting rod is fixed by fixing bolts.

[0008] A limiting frame is fixedly connected to the top of the movable block. The limiting frame is a hollow structure. A cylinder is fixedly connected inside the limiting frame. A telescopic rod is slidably arranged inside the cylinder. The upper end of the telescopic rod passes through the top of the limiting frame and is connected to a lifting block. Two support rods are hinged to the lifting block. The two support rods are arranged in a V-shape with the opening facing upward.

[0009] Both ends of the top of the limiting frame are rotatably connected to movable rods via rotating shafts. The lower end of the movable rod is rotatably connected to the limiting frame, and an arc-shaped clamping rod is provided on the inner wall of the upper end of the movable rod. The end of each support rod away from the lifting block is fixedly connected to the middle of the movable rod.

[0010] The device features a limiting mechanism that allows operators to engage the limiting rods at different positions using fixed bolts. A cylinder can then be activated to extend or retract the telescopic rod, which in turn extends or retracts the movable rod for support. The movable rod, along with the arc-shaped clamping rod, limits the internal wiring, preventing tangling and improving ease of use.

[0011] Furthermore, the movable rod described in this application includes an adjusting rod and an extension rod. The lower end of the adjusting rod is rotatably connected to the limiting frame, and the upper end of the adjusting rod is fixedly connected to the extension rod. The adjusting rod and the extension rod are set at an angle, and an arc-shaped clamping rod is fixedly connected to the inner side wall of the extension rod. The end of the support rod away from the lifting block is fixedly connected to the connection between the adjusting rod and the extension rod. When closed, the two adjusting rods and the two support rods are set in an "M" shape.

[0012] Furthermore, the adjusting rod and the extension rod in the device of this application are integrally formed. Alternatively, the adjusting rod and the extension rod can be fixedly connected by a connecting shaft, and the support rod applies a pushing or pulling force, thereby driving the arc-shaped clamping rod to perform a small-range closing / opening operation, which facilitates the limiting and constraint of the cable.

[0013] Furthermore, multiple wire-passing holes are symmetrically provided on the two side walls of the connecting cabinet that are parallel to the fixing plate. Above each wire-passing hole is a through hole that communicates with the wire-passing hole. A fixing mechanism for fixing cables is provided in the wire-passing hole and the through hole.

[0014] Furthermore, each of the fixing mechanisms includes a first fixing plate and a second fixing plate nested inside the wire hole. Both the first fixing plate and the second fixing plate are arc-shaped structures with openings facing each other. The first fixing plate is located below the second fixing plate. A spring is fixedly connected to the bottom of the first fixing plate, and the lower end of the spring is fixedly connected to the connecting cabinet. A threaded rod is fixedly connected to the top of the second fixing plate. The threaded rod is disposed through a through hole, and a threaded sleeve fixedly connected to the connecting cabinet is disposed in the through hole. The threaded rod is threadedly connected to the inside of the threaded sleeve. A rotating rod is fixedly connected to the top of the threaded rod.

[0015] When the device is in use, the operator can rotate the rotating rod to drive the threaded rod to rotate inside the threaded sleeve. At this time, the second fixing plate can be moved closer to the first fixing plate. By passing the wire through the second fixing plate and the first fixing plate, the wire is fixed and the stability of the wire during use is improved.

[0016] Furthermore, the device of this application also includes a heat dissipation mechanism, which includes a heat dissipation plate nested on the front end of the connecting cabinet. The heat dissipation plate has multiple heat dissipation holes, and a locking plate is fixedly installed on each heat dissipation hole. A transmission rod is fixedly installed inside the locking plate, and a motor is connected to the other end of the transmission rod. A cooling fan is fixedly connected to the periphery of the transmission rod, and a dustproof net is installed on the outside of the locking plate. During prolonged use, the device may generate heat. Starting the motor drives the transmission rod to activate the cooling fan, which dissipates heat from the inside of the device, thus improving the safety of the device during use.

[0017] Furthermore, the device of this application also includes an installation mechanism, which includes an installation plate connected to the side wall of the connecting cabinet. A vertically arranged bonding plate is fixedly connected to the lower end of the installation plate. An installation cylinder is installed above the bonding plate. An installation rod is installed in the internal thread of the installation cylinder. The installation rod passes through the bonding plate. A turntable is fixedly connected to the top of the installation rod.

[0018] Furthermore, a handle is fixedly connected to the outer side of the cover plate, and an anti-slip pad is provided around the handle; an observation window is opened on the upper surface of the cover plate, and a transparent plate is installed inside the observation window. Operators can open or close the cover plate by holding the anti-slip pad and pulling the handle, improving the ease of use and anti-slip effect of the device. The observation window on the upper surface of the cover plate, with a transparent plate inside, allows operators to observe the internal wiring of the device, further enhancing its ease of use.

[0019] Furthermore, an operation panel is fixedly connected to the outer wall of the connecting cabinet away from the heat dissipation mechanism, and the operation panel is equipped with operation buttons and a display screen.

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] (1) This application sets a limiting mechanism to prevent the cable from shifting or getting tangled due to equipment shaking, operation and maintenance, etc., so as to ensure the cable layout is clear during maintenance and improve operation safety and maintenance efficiency.

[0022] (2) With the fixed mechanism set, when the device is in use, the operator can rotate the rotating rod to drive the threaded rod to rotate inside the threaded sleeve. At this time, the second fixed plate can be brought closer to the first fixed plate. By passing the line through the second fixed plate and the first fixed plate, the line is fixed, which improves the stability of the line during use.

[0023] (3) By setting up a heat dissipation mechanism, the internal temperature of the cabinet is controlled to avoid various problems such as accelerated insulation aging caused by overheating, thereby ensuring the long-term stable operation of the device and reducing the risk of accidents. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the cover plate of the present invention;

[0026] Figure 3 This is a schematic diagram of the limiting mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the limiting frame of the present invention;

[0028] Figure 5 This is a schematic diagram of the installation mechanism of the present invention;

[0029] Figure 6 This is a schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 7 This is a schematic diagram of the heat dissipation mechanism of the present invention.

[0031] In the diagram: 1. Connecting cabinet; 101. Cover plate; 102. Handle; 103. Anti-slip mat; 104. Observation window; 105. Transparent panel; 106. Operating table; 107. Operating button; 108. Display screen; 2. Limiting mechanism; 201. Fixed plate; 202. Moving block; 204. Limiting rod; 203. Connecting plate; 205. Fixing bolt; 206. Limiting frame; 207. Cylinder; 208. Telescopic rod; 209. Adjusting rod; 210. Connecting shaft; 211. Extension rod; 212 1. Clamping rod; 213. Support rod; 214. Lifting block; 3. Fixing mechanism; 301. Rotating rod; 302. Threaded sleeve; 303. Threaded rod; 304. First fixing plate; 305. Spring; 306. Second fixing plate; 4. Installation mechanism; 401. Mounting plate; 402. Adhesive plate; 403. Mounting cylinder; 404. Mounting rod; 405. Turntable; 5. Heat dissipation mechanism; 501. Heat dissipation plate; 502. Clamping plate; 503. Transmission rod; 504. Cooling fan; 505. Dustproof net. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Example

[0034] like Figure 1 , Figure 3 As shown, this application proposes an auxiliary device for connecting electrical secondary circuit lines in a substation, including a connection cabinet 1. A cover plate 101 is hinged to the top of the connection cabinet 1. The device also includes a limiting mechanism 2, which comprises multiple fixed plates 201 arranged parallel to each other and spaced apart inside the connection cabinet 1. The fixed plates 201 are fixedly connected to the bottom of the connection cabinet 1. Several evenly arranged limiting rods 204 are distributed on both sides of each fixed plate 201 inside the connection cabinet 1, and the limiting rods 204 are fixedly connected to the connection cabinet 1. A moving block 202 is slidably connected to the top of each fixed plate 201, and a connecting plate 203 is fixedly connected to both sides of the moving block 202. Each connecting plate 203 has a limiting hole adapted to the limiting rod 204. In use, the position of the connecting plate 203 is adjusted by the moving block 202, and then the limiting rod 204 passes through the limiting hole on the connecting plate. The periphery of the limiting rod 204 is fixed by fixing bolts 205.

[0035] like Figure 3 , Figure 4 As shown, a limiting frame 206 is fixedly connected to the top of the moving block 202. The limiting frame 206 has a hollow structure. A cylinder 207 is fixedly connected inside the limiting frame 206. A telescopic rod 208 is slidably arranged inside the cylinder 207. The upper end of the telescopic rod 208 passes through the top of the limiting frame 206 and is connected to a lifting block 214. Two support rods 213 are hinged to the lifting block 214. The two support rods 213 are arranged in a V-shape with the opening facing upward, that is, the two support rods 213 are symmetrically arranged with the lifting block as the center.

[0036] The top two ends of the limiting frame 206 are rotatably connected to movable rods via rotating shafts. Specifically, the movable rods include adjusting rods 209 and extension rods 211. The lower end of the adjusting rod 209 is rotatably connected to the limiting frame 206, and the upper end of the adjusting rod 209 is fixedly connected to the extension rod 211. The adjusting rod 209 and the extension rod 211 are set at an angle, that is, the two angles on the left and right sides open towards the cable direction. An arc-shaped clamping rod 212 is fixedly connected to the inner side wall of the extension rod 211. The arc shape can improve the fit with the cable. The end of the support rod 213 away from the lifting block 214 is fixedly connected to the connection between the adjusting rod 209 and the extension rod 211. When closed, the two adjusting rods 209 and the two support rods 213 are set in an "M" shape. The lower end of the movable rod is rotatably connected to the limiting frame 206, and an arc-shaped clamping rod 212 is provided on the inner wall of the upper end of the movable rod; the end of each support rod 213 away from the lifting block 214 is fixedly connected to the middle of the movable rod.

[0037] By using a limiting mechanism, the device can match different limiting rods according to the cable position during use. The limiting mechanism is fixed by the cooperation of the connecting plate and the limiting hole. At this time, the lifting block can be adjusted within a certain range by the cylinder. When rising, the support rod provides a certain thrust. Since the lower end of the adjusting rod is rotatably connected to the limiting frame, the extension rod will be pushed outward under the thrust of the support rod. The maximum adjustment is until the two support rods are in a straight line with the lifting block. Therefore, this setting can adjust the limiting space according to the cable thickness and limit the internal wiring of the device to prevent the wiring from getting tangled and reduce the difficulty of subsequent maintenance and repair.

[0038] It should be noted that the adjusting rod 209 and the extension rod 211 in the device of this application can be integrally formed and have a slightly angled structure; in addition, the adjusting rod 209 and the extension rod 211 in this application can also be fixedly connected by the connecting shaft 210, and the upper end of the support rod can be connected to the connection point. Preferably, the lengths of the adjusting rod 209 and the extension rod 211 are the same.

[0039] like Figure 1 , Figure 2 , Figure 5As described above, the connection cabinet 1 of this application has multiple symmetrically arranged wire holes 6 on its two side walls, which are two surfaces parallel to the fixing plate 201. Each wire hole 6 has a through hole above it, communicating with the wire hole 6. A fixing mechanism 3 for fixing cables is installed within the wire hole 6 and the through hole. Specifically, each fixing mechanism 3 includes a first fixing plate 304 and a second fixing plate 306 nested inside the wire hole 6. Both the first fixing plate 304 and the second fixing plate 306 have arc-shaped structures and their openings face each other. The first fixing plate 304 is located below the second fixing plate 306. A spring 305 is fixedly connected to the bottom of the first fixing plate 304, and the lower end of the spring 305 is fixedly connected to the connection cabinet 1. A threaded rod 303 is fixedly connected to the top of the second fixing plate 306. The threaded rod 303 passes through the through hole, and a threaded sleeve 302 fixedly connected to the connection cabinet 1 is installed within the through hole. The threaded rod 303 is threadedly connected inside the threaded sleeve 302. A rotating rod 301 is fixedly connected to the top of the threaded rod 303. When the device is in use, the operator can rotate the rotating rod 301 to drive the threaded rod 303 to rotate inside the threaded sleeve 302. At this time, the second fixing plate 306 can be brought closer to the first fixing plate 304. By passing the line between the second fixing plate 306 and the first fixing plate 304, the line is fixed, improving the stability of the line during use.

[0040] like Figure 1 , Figure 7 As shown, the device of this application also includes a heat dissipation mechanism 5. The heat dissipation mechanism 5 includes a heat dissipation plate 501 nested inside the front end face of the connecting cabinet 1. The heat dissipation plate 501 has multiple heat dissipation holes, and a locking plate 502 is fixedly installed on each heat dissipation hole. A transmission rod 503 is fixedly installed inside the locking plate 502. The other end of the transmission rod 503 is connected to a motor. A cooling fan 507 is fixedly connected to the periphery of the transmission rod 503. A dustproof net 505 is provided on the outside of the locking plate 502. During long-term use of the device, the transmission rod 503 can be driven by starting the motor to drive the cooling fan 504 to dissipate heat from the inside of the device, thereby improving the safety of the device.

[0041] like Figure 1 , Figure 6 As shown, the device of this application also includes an installation mechanism 4. The installation mechanism 4 includes an installation plate 401 connected to the side wall of the connecting cabinet 1. A vertically arranged bonding plate 402 is fixedly connected to the lower end of the installation plate 401. An installation cylinder 403 is installed above the bonding plate 402. An installation rod 404 is threaded inside the installation cylinder 403 and passes through the bonding plate 402. A turntable 405 is fixedly connected to the top of the installation rod 404. When the device is in use, the installation rod 404 can be vertically threaded into the installation cylinder 403, and the device can be fixed to the ground by rotating the turntable, which improves the stability of the device.

[0042] like Figure 2 As shown, a handle 102 is fixedly connected to the outer side of the cover plate 101 of this application device, and an anti-slip pad 103 is provided around the handle 102. An observation window 104 is opened on the upper surface of the cover plate 101, and a transparent plate 105 is provided inside the observation window 104. The operator can open or close the cover plate 101 by holding the anti-slip pad 103 and pulling the handle 102, which improves the convenience of using the device. An observation window 104 is opened on the upper surface of the cover plate 101, and a transparent plate 105 is provided inside the observation window 104. The operator can observe the internal wiring of the device through the transparent plate 105 and the operating table 106, which improves the safety of using the device. An operating panel 106 is fixedly connected to the outer wall of the connecting cabinet 1 away from the heat dissipation mechanism 5. The operating panel 106 is provided with operating buttons 107 and a display screen 108 for operating and observing the device.

[0043] It should be noted that, in this document, relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A substation electrical secondary circuit line connection aid device, comprising a connection cabinet, a cover plate is hingedly connected to the top of the connection cabinet, characterized in that: The device also includes a limiting mechanism, which includes multiple fixing plates. The multiple fixing plates are parallel to each other and spaced apart inside the connecting cabinet. The fixing plates are fixedly connected to the bottom of the inside of the connecting cabinet. Inside the connecting cabinet, there are several evenly arranged limiting rods distributed on both sides of each fixed plate, and the limiting rods are fixedly connected to the connecting cabinet; a moving block is slidably connected to the top of each fixed plate, and connecting plates are fixedly connected to both sides of the moving block, and each connecting plate is provided with a limiting hole that matches the limiting rod. A limiting frame is fixedly connected to the top of the movable block. The limiting frame is a hollow structure. A cylinder is fixedly connected inside the limiting frame. A telescopic rod is slidably arranged inside the cylinder. The upper end of the telescopic rod passes through the top of the limiting frame and is connected to a lifting block. Two support rods are hinged to the lifting block. The two support rods are arranged in a V-shape with the opening facing upward. Both ends of the top of the limiting frame are rotatably connected to movable rods via rotating shafts. The lower end of the movable rod is rotatably connected to the limiting frame, and an arc-shaped clamping rod is provided on the inner wall of the upper end of the movable rod. The end of each support rod away from the lifting block is fixedly connected to the middle of the movable rod.

2. A substation electrical secondary circuit line connection aid according to claim 1 characterised in that: The movable rod includes an adjusting rod and an extension rod. The lower end of the adjusting rod is rotatably connected to the limiting frame, and the upper end of the adjusting rod is fixedly connected to the extension rod. The adjusting rod and the extension rod are set at an angle. An arc-shaped clamping rod is fixedly connected to the inner side wall of the extension rod. The end of the support rod away from the lifting block is fixedly connected to the connection between the adjusting rod and the extension rod. When closed, the two adjusting rods and the two support rods are set in an "M" shape.

3. A substation electrical secondary circuit line connection aid according to claim 2, characterised in that: The adjusting rod and the extension rod are integrally formed.

4. A substation electrical secondary circuit wiring aid according to claim 2, characterised in that: The adjusting rod and the extension rod are fixedly connected by a connecting shaft.

5. A substation electrical secondary circuit wiring aid according to claim 1, characterised in that: Multiple wire-passing holes are symmetrically opened on the two side walls of the connecting cabinet that are parallel to the fixing plate. Above each wire-passing hole is a through hole that communicates with the wire-passing hole. A fixing mechanism for fixing cables is installed in the wire-passing hole and the through hole.

6. A substation electrical secondary circuit wiring aid according to claim 5, characterised in that: Each fixing mechanism includes a first fixing plate and a second fixing plate nested inside the wire hole. Both the first fixing plate and the second fixing plate are arc-shaped and have openings facing each other. The first fixing plate is located below the second fixing plate. A spring is fixedly connected to the bottom of the first fixing plate, and the lower end of the spring is fixedly connected to the connecting cabinet. A threaded rod is fixedly connected to the top of the second fixing plate. The threaded rod is disposed through a through hole, and a threaded sleeve fixedly connected to the connecting cabinet is disposed in the through hole. The threaded rod is threadedly connected to the inside of the threaded sleeve. A rotating rod is fixedly connected to the top of the threaded rod.

7. A substation electrical secondary circuit line connection aid according to any one of claims 1 to 6, characterised in that: The device also includes a heat dissipation mechanism, which includes a heat dissipation plate nested on the front end of the connecting cabinet. The heat dissipation plate has multiple heat dissipation holes, and a locking plate is fixedly installed on each heat dissipation hole. A transmission rod is fixedly installed inside the locking plate, and a motor is connected to the other end of the transmission rod. A cooling fan is fixedly connected to the periphery of the transmission rod. A dustproof net is installed on the outside of the locking plate.

8. A substation electrical secondary circuit line connection aid according to claim 7, characterised in that: The device also includes an installation mechanism, which includes an installation plate connected to the side wall of the connecting cabinet. A vertically arranged bonding plate is fixedly connected to the lower end of the installation plate. An installation cylinder is installed above the bonding plate. An installation rod is installed inside the installation cylinder with internal threads. The installation rod passes through the bonding plate. A turntable is fixedly connected to the top of the installation rod.

9. A substation electrical secondary circuit wiring aid according to claim 1, characterised in that: A handle is fixedly connected to the outside of the cover plate, and an anti-slip pad is provided around the handle; an observation window is provided on the upper surface of the cover plate, and a transparent plate is provided inside the observation window.

10. The auxiliary device for connecting secondary electrical circuits in a substation according to claim 7, characterized in that: An operation panel is fixedly connected to the outer wall of the connecting cabinet away from the heat dissipation mechanism. The operation panel is equipped with operation buttons and a display screen.