Bus duct connector capable of rapidly recovering power supply

Abstract

The utility model discloses a bus duct connector capable of rapidly recovering power supply, a metal connecting sheet is placed between insulating partition plates, two connector end plates clamp the overlapped insulating partition plates and are connected together through bolts, the width direction of the metal connecting sheet is higher than the width of the insulating partition plates by 12-150mm, and the width direction of the metal connecting sheet is larger than that of the insulating partition plates by 12-150mm. At least one wiring hole is formed in the part exceeding the width of the insulating partition plate, and the aperture of the wiring hole is 8.4-21 mm. The electric connection method comprises the following steps of: 1, hanging a plug box without a plug connector, and connecting a wire outlet end of an internal circuit breaker with a floor main switch by using a cable; 2, prefabricating a metal connecting sheet, wherein the metal connecting sheet is made of a current-conducting plate; 3, installing the improved bus duct connectors: respectively inserting one sides of the two improved bus duct connectors into the intact end heads of the upper and lower bus duct main bodies, and fastening the two improved bus duct connectors by using bolts; and 4, circuit connection: connecting the wiring holes of the metal connecting sheets on the upper and lower bus duct connectors and the wire inlet end of the circuit breaker in the jack box by using a cable.

Description

Technical Field

[0001] This utility model relates to a connector for a power supply line, belonging to the field of power equipment and device technology and its installation technology, and particularly to a busbar connector for quick power restoration. Background Technology

[0002] Busbar connectors are electrical components used to connect conductive busbars in a busbar system. They typically consist of two outer connector end plates, 5-6 insulating partitions sandwiching conductive connecting pieces, and fastening bolts. The insulating partitions ensure electrical isolation, prevent short circuits, and withstand certain mechanical strength and high temperatures. The structural feature is that phase-to-phase electrical isolation is achieved by inserting the busbar conductors (busbars) into the corresponding insulating partitions of the connector. Electrical connection between each conductive busbar is achieved using the conductive connecting pieces within the connector, allowing current to be smoothly transmitted from one section of the busbar to another. Grounding is ensured using grounding connecting pieces or the busbar casing, guaranteeing system grounding safety and thus ensuring the continuity and integrity of the busbar system. Existing high-rise buildings have electrical shafts designed for power transmission. Pre-drilled openings are designed between floors within these shafts for busbars or cables to pass through from bottom to top. A busbar system consists of fixed supports, protective housings, busbars, connectors, plug-in components, plug boxes, socket insulating sleeves, shunt circuit breakers, and related accessories. The busbar trunking shell is a rectangular, enclosed metal casing. The cover plate has lead-out holes that accommodate insulating sleeves for insertion holes. Inside, busbars made of copper or aluminum are installed, forming the main body of the busbar trunking. Installation involves using expansion bolts to connect and fix brackets to the electrical shaft walls and cast-in-place slabs on each floor, according to electrical wiring requirements. The busbar trunking shell is then bolted to these brackets. Conductive busbars are installed inside the shell using a three-phase four-wire or three-phase five-wire system, forming busbars. Locking bolts are then used to secure the busbar trunking through pre-drilled holes on the side of the shell. Busbar trunking is typically custom-made to the total height of a high-rise building unit. Due to its weight and length, it must be segmented for easy installation. Each segment is generally about 3 meters long, based on the floor height. When laying busbar trunking, two sections of the main body need to be connected together. Typically, the busbars on both sections are inserted into a busbar trunking connector from both sides. Then, mounting bolts are used to connect the connector to the two busbar trunking sections. Inside the connector, two conductive connecting plates separated by an insulating partition clamp each busbar, ensuring a tight fit and thus completing the connection between the two busbar trunking sections, forming a unit power supply line. Existing busbar trunking connectors are devices that connect each section of the busbar trunking to conduct power; they are only used for connecting two sets of busbar trunking sections to ensure continuous power supply and do not have other functions. To facilitate bolt drilling, existing insulating partitions are molded from epoxy resin, polycarbonate, or higher-grade DMC (dense molding compound). The inner side has a rim slightly larger than the length and width of the conductive connecting piece, and the rim height is the same as the thickness of the conductive connecting piece. This allows the conductive connecting piece to fit snugly inside the insulating partition without wobbling. At the same time, the bolt mounting holes of the insulating partition also have rims. The bolt mounting holes of the conductive connecting piece are slightly larger and are positioned by fitting into the rims of the bolt mounting holes of the insulating partition.In this way, the mounting holes for the insulating partition bolts and the mounting holes for the conductive connecting pieces can be aligned in a straight line, facilitating the insertion and tightening of the bolts. Connector: Also called a piercing clamp or plug, it resembles a copper clip with an external plastic-cased insulating shell, fixed to the connector box. The head of the copper clip passes through the lead-out hole and clamps onto the busbar inside the busbar trunking. The copper plate at the tail end connects to the cable, which then connects to the incoming terminal of the circuit breaker. Electrical equipment connects to the outgoing terminal of the circuit breaker, forming the power supply lines for each floor. Connector box: One of the accessories for the busbar trunking, fixed to the outer shell of the busbar trunking. It has lead-out holes on the back, which communicate with the lead-out holes on the busbar trunking cover. Its main function is to extend and expand the branch lines of the busbar trunking. Internally, it is equipped with a plastic-cased circuit breaker of appropriate current capacity, which connects the current of the busbar trunking to the incoming terminal of the main switch on each floor, and then from the outgoing terminal of the main switch to the meter box of each household, distributing the current to the electrical equipment in each household. Branch lines are led out from the busbars within the bus trunking on each floor to supply power to each unit floor. Currently, bus trunking is suitable for AC power supplies with a rated voltage below 660V and a frequency of 50Hz, and for three-phase four-wire or three-phase five-wire power distribution systems with a rated current of 400A~1600A. Similar products to bus trunking are widely used in indoor low-voltage power transmission trunk line projects, enabling efficient transmission and distribution of electrical energy. Bus trunking can be classified into three types according to its insulation method: air-insulated plug-in bus trunking, compact insulated plug-in bus trunking, and high-strength plug-in bus trunking. The common characteristic of these branch lines extending from the busbar is the use of copper clips for vertical insertion. Prolonged contact after energization easily leads to overheating, arc erosion, and oxidation at the contact points. This results in poor contact, poor conductivity, and even connection failure, causing damage to household appliances. Therefore, the copper clip-type connectors used in branch lines have a short lifespan and damage the busbar (requiring grinding before reuse). Disassembly and replacement are labor-intensive and time-consuming, hindering rapid power restoration and operation. Furthermore, long-term use of busbar trunking, especially in older residential areas, leads to high temperatures, dust accumulation, dampness, or leaks inside. This causes a decrease in phase-to-phase insulation resistance, insulation damage leading to electrical breakdown, deformation of the copper busbars due to heat, and even small animals like mice causing short circuits and major power outages. Since busbar trunking is custom-made and requires rush production, the problem cannot be solved quickly, and replacement takes even longer, preventing rapid power restoration. Busbar trunking products are manufactured by individual companies, transported to the construction site in sections, and installed and connected with bolts. Their models and specifications are not entirely uniform, with some products exhibiting significant differences. Once a busbar trunking failure occurs, on-site repairs become much more difficult, and power restoration takes a long time. How to improve existing power supply methods to quickly handle faults and restore power rapidly after busbar trunking or connector failures, thereby improving the reliability of residential power supply, has become one of the key issues that power companies urgently need to address regarding power supply systems for high-rise buildings. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a busbar connector for rapid power restoration, which can quickly handle faults and restore power supply, ensuring the operation of the power supply system.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a busbar connector for rapid power restoration, comprising a connector end plate, an insulating partition, a metal connecting piece, a locking bolt, and a bolt insulating sleeve. The metal connecting piece is placed between the insulating partitions, and two connector end plates clamp the stacked insulating partitions, which are connected together by 1-2 locking bolts fitted with bolt insulating sleeves. The characteristic feature is that the width of the metal connecting piece is 12mm-150mm higher than the width of the insulating partition, and the portion exceeding the width of the insulating partition has at least one wiring hole with a diameter of 8.4mm-21mm.

[0005] The wiring holes of the metal connecting piece are round or square.

[0006] The metal connecting piece is bent, with the upper and lower parts parallel after bending.

[0007] The metal connecting piece is provided with a hanging ear on the part that extends beyond the width of the insulating partition, and the hanging ear has a wiring hole.

[0008] The portion of the metal connecting piece that extends beyond the width of the insulating partition is provided with a cylinder, which is horizontally connected to the metal connecting piece.

[0009] The above-mentioned method for quickly restoring power supply to a busbar connector includes the following steps:

[0010] S1: Plug-in box without connectors: A plug-in box is hung on the wall in the fault busbar area. It is equipped with a molded case circuit breaker of the corresponding current. The output terminal of the circuit breaker is connected to the input terminal of the floor main switch in the meter box by a cable. The output terminal of the main switch is then connected to the household meter by a cable.

[0011] S2: Prefabricated metal connecting piece: Made of conductive plate, formed by stamping or cutting and welding. The width of the metal connecting piece is 12mm to 150mm higher than the width of the insulating partition. The part exceeding the width of the insulating partition shall be provided with at least one wiring hole with a diameter of 8.4mm to 21mm.

[0012] S3: Install the improved busbar trunking connector: First, remove the faulty busbar trunking body and its connectors at both ends. Insert one side of each of the two improved busbar trunking connectors into the ends of the intact upper and lower busbar trunking bodies, respectively. Inside the busbar trunking connector, two metal connecting plates separated by an insulating partition clamp each busbar tightly. Then, use 1-2 locking bolts from the set bolt insulating sleeve to pass through the mounting holes on the connector end plate, the mounting holes on the stacked insulating partition, and the mounting holes on the metal connecting plates to tighten them.

[0013] S4: Circuit connection: Connect the wiring holes of the metal connecting plates on the upper and lower busbar connectors one by one with the cables to connect the busbars. At the same time, lead the cables from the wiring holes on the metal connecting plates on the upper or lower busbar connectors to the plug box on the wall of the faulty busbar area that has no plugs, and then connect it to the incoming terminal of the circuit breaker. Power supply is restored to the floor with the faulty busbar.

[0014] In use, if the connector on the faulty floor is burned out, remove the connector from the faulty floor, then remove one busbar connector on the faulty floor and replace it with the improved busbar connector of this invention. Connect one end of a cable to the wiring hole on each metal connecting piece of the busbar connector of this invention, and connect the other end of the cable to the incoming terminal of the circuit breaker in the faulty floor's connector box. Power will be quickly restored to the faulty floor. If the busbar on the faulty floor is burned out, first remove the main body of the faulty busbar and its connectors at both ends, then insert one side of each of the two improved busbar connectors of this invention into the upper... For the intact ends of the upper and lower busbar trunking sections, use 1-2 locking bolts of the set bolt insulating sleeve to pass through the mounting holes on the connector end plate, the mounting holes on the stacked insulating partition, and the mounting holes on the metal connecting piece to secure them. Connect the wiring holes on the metal connecting pieces of the upper and lower busbar trunking connectors one by one with cables. At the same time, connect the nearest cable from the wiring hole on the metal connecting piece of the upper or lower busbar trunking connector to the incoming terminal of the circuit breaker in the plug box without a plug on the wall of the faulty busbar trunking floor, so as to realize rapid power supply to the entire unit and the faulty busbar trunking floor.

[0015] The beneficial effects of this utility model are as follows: By improving existing busbar connectors, a rapid circuit connection function is achieved. Wiring holes are provided on the metal connecting plates, allowing bypassing the main body of the faulty busbar. Cables can be used to connect the wiring holes on the metal connecting plates of the upper and lower busbar connectors to achieve unit power supply. Simultaneously, the wiring holes on the metal connecting plates of the upper or lower busbar connectors can be connected by cables to the input terminal of the circuit breaker in the plug-in box on the wall of the faulty busbar area, restoring power supply to the floor of the faulty busbar. Since the wiring is done on the busbar connectors, construction is convenient and simple, enabling rapid power restoration and improving the speed of power emergency repairs. Furthermore, one line of this utility model can be directly connected to the input terminal of the circuit breaker in the plug-in box, eliminating the need for easily faulty copper clip connectors, significantly reducing power failures and ensuring long-term stable power supply operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the double bolt mounting hole connector structure of this utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the left piece of the bent metal connecting piece with double bolt mounting holes.

[0018] Figure 3 yes Figure 1 Schematic diagram of the right side of the bent metal connecting piece with double bolt mounting holes.

[0019] Figure 4 yes Figure 1 Left piece of bent metal connecting plate with double bolt mounting holes (see) Figure 2 Right side (see) Figure 3 ) Schematic diagram of the upper bonding structure after the two pieces are combined.

[0020] Figure 5 This is a schematic diagram of the structure of the flat single-bolt mounting hole metal connecting piece of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the flat metal connecting piece with hanging ears and double bolt mounting holes of this utility model.

[0022] Figure 7 This is a schematic diagram of the single-bolt mounting hole connector structure of this utility model.

[0023] Figure 8 This is a schematic diagram of the circuit connection between the busbar connector of this utility model and the busbar body and the plug box.

[0024] In the diagram: 1. Metal connecting piece, 101. Hanging lug, 102. Cylinder, 2. Insulating partition, 3. Locking bolt, 4. Bolt insulating sleeve, 5. Upper busbar trunking body, 6. Meter box, 601. Floor main switch, 602. Incoming meter, 7. Plug box, 701. Circuit breaker, 8. Busbar, 9. Lower busbar trunking body, 10. Cable, 11. Faulty busbar trunking body, 12. Connector end plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. See also: Figures 1 to 8 A busbar connector for rapid power restoration includes a connector end plate 12, an insulating partition 2, a metal connecting piece 1, locking bolts 3, and bolt insulating sleeves 4. The metal connecting piece 1 is placed between the insulating partitions 2. Two connector end plates 12 clamp the stacked insulating partitions 2 and are connected together by one or two locking bolts 3 fitted with bolt insulating sleeves 4. The metal connecting piece 1 is characterized in that its width is 12mm to 150mm wider than the insulating partition 2, and the portion exceeding the width of the insulating partition 2 has at least one wiring hole with a diameter of 8.4mm to 21mm. The wiring hole of the metal connecting piece 1 is circular or square. The metal connecting piece 1 is bent, with the upper and lower parts parallel after bending. The portion of the metal connecting piece 1 exceeding the width of the insulating partition 2 has a lug 101 with a wiring hole. The portion of the metal connecting piece 1 exceeding the width of the insulating partition 2 has a cylinder 102, which is horizontally connected to the metal connecting piece 1.

[0026] Combination Figure 1 , Figure 7 See Figure 8 The electrical connection method for a bus trunking connector for rapid power restoration includes the following steps:

[0027] S1: Hanging plug box 7 without plugs: Hang plug box 7 on the wall of the fault busbar area. The plug box 7 is equipped with a molded case circuit breaker 701 of the corresponding current. The output terminal of the circuit breaker 701 is connected to the input terminal of the floor main switch 601 in the meter box 6 by cable 10. The output terminal of the main switch 601 is then connected to the incoming meter 602 by cable 10.

[0028] S2: Prefabricated metal connecting piece 1: Made of conductive plate, formed by stamping or cutting and welding. The width of the metal connecting piece 1 is 12mm to 150mm higher than the width of the insulating partition 2. The part exceeding the width of the insulating partition 2 shall be provided with at least one wiring hole with a diameter of 8.4mm to 21mm.

[0029] S3: Install the improved busbar connector: First, remove the faulty busbar body 11 and its connectors at both ends. Insert one side of the two improved busbar connectors into the ends of the intact upper busbar body 5 and lower busbar body 9, respectively. Inside the busbar connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use 1 to 2 locking bolts 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, and the mounting holes on the metal connecting plates 1 to tighten them.

[0030] S4: Circuit connection: Connect the wiring holes of the metal connecting pieces 1 on the upper and lower busbar connectors one by one with the cable 10 to conduct the busbar. At the same time, lead the cable 10 from the wiring hole on the metal connecting piece 1 on the upper or lower busbar connector to the plug box 7 on the wall of the faulty busbar area that has no plug-in parts, and further connect it to the incoming terminal of the circuit breaker 701. Power supply is restored to the floor of the faulty busbar.

[0031] like Figure 1 , Figure 7 As shown, the improved busbar connector of this utility model minimizes changes to the original component dimensions and assembly method to facilitate docking with the existing busbar trunking. The connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4 maintain their original specifications and dimensions. The metal connecting piece 1 replaces the original conductive connecting piece hidden within the insulating partition 2, while the position of the bolt connection mounting hole in the middle remains unchanged. The width of the metal connecting piece 1 perpendicular to the busbar 8 is changed, extending 12mm to 150mm above the width of the insulating partition 2 to allow space for wiring holes. The length of the metal connecting piece 1 parallel to the busbar 8 remains consistent with the original conductive connecting piece length. At least one wiring hole is provided on the portion of the metal connecting piece 1 extending beyond the width of the insulating partition 2. The wiring holes on the two metal connecting pieces 1 attached to each busbar 8 are in the same position. The position of the wiring hole on the metal connecting piece 1 on each busbar 8 is staggered as much as possible from the positions of the wiring holes on the two metal connecting pieces 1 attached to other busbars 8 to facilitate connection between the wiring holes on each phase metal connecting piece 1 and the cable 10. The wiring holes are either round or square, with a side length of 8.4mm to 21mm. The square wiring holes are designed to facilitate the use of semi-circular head square neck bolts, making cable 10 wiring easier. Ideally, each metal connecting piece 1 should have 2-3 wiring holes (see details). Figures 2-6 This is to facilitate wiring during emergency repairs. The metal connecting piece 1 is made of conductive plate, such as copper, aluminum, or copper-aluminum composite plate, and is formed by stamping or cutting and welding. The wiring holes of the metal connecting piece 1 can be made round or square, or a combination of round and square. The lug 101 can also be combined with the cylinder 102 (see...). Figure 2For easy selection of wiring by electricians, it is used to connect cable 10. To ensure the upper parts of the two metal connecting pieces 1 fit together, the metal connecting pieces 1 are processed into a bent shape, with the upper and lower parts parallel after bending (see details). Figure 2 , Figure 3 and Figure 2 , Figure 3 combination Figure 4 For ease of installation, it is best to weld the upper parts of the two bent metal connecting pieces 1 together using silver or copper solder. After welding, the lower gap between the two bent metal connecting pieces 1 should be slightly larger than the thickness of the busbar 8 by 0.1mm to 0.2mm to facilitate the mounting of the metal connecting pieces 1 onto the busbar 8. The portion of the metal connecting piece 1 that extends beyond the width of the insulating partition 2 can be processed into a lug 101, with wiring holes on the lug 101. The portion of the metal connecting piece 1 that extends beyond the width of the insulating partition 2 can also be welded or rolled into a cylinder 102, which is horizontally connected to the metal connecting piece 1 (see details). Figure 2 The metal connecting piece 1 is manufactured according to the specifications and dimensions of the connector matching the busbar trunking, with a thickness of 2mm~5mm, a width of 67mm~285mm perpendicular to the busbar 8, and a length of 120mm~160mm parallel to the busbar 8. The mounting holes of the metal connecting piece 1 are preferably designed as oblong holes to facilitate quick fine-tuning during the installation of the locking bolts 3, saving repair time. During installation, the two metal connecting pieces 1, separated by insulating partitions 2 inside the busbar trunking connector, clamp each busbar 8 tightly. Then, one or two locking bolts 3 of the insulating sleeve 4 are passed through the mounting holes on the overlapping insulating partitions 2 and the metal connecting pieces 1 to secure them.

[0032] Figure 8 This invention provides an improved electrical connection method for busbar connectors, applicable to AC power supplies with rated voltages below 660V and frequencies of 50Hz in high-rise residential buildings, and three-phase four-wire or three-phase five-wire power distribution systems with rated currents of 400A to 1600A. The circuit connection method remains unchanged regardless of whether the busbar connector has double or single bolt mounting holes. Rapid repair of power outages includes the following steps:

[0033] S1: Hanging the plug box 7 without plug components: Drill expansion bolts with a diameter of 8mm~12mm on the wall in the fault busbar area, hang the plug box 7, do not install plug components inside the plug box 7, assemble the molded case circuit breaker 701 of the corresponding current size according to the standard, connect the output terminal of the circuit breaker 701 to the input terminal of the floor main switch 601 in the meter box 6 with cable 10, and connect the output terminal of the main switch 601 to the incoming meter 602 with cable 10.

[0034] S2: Prefabricated metal connecting piece 1: Made of conductive plate. In the event of a power outage in a faulty unit, first check the material of the busbar 8 in the busbar trunking of that unit, whether it is made of copper or aluminum. The metal connecting piece 1 should be a spare part of the same corresponding material. For aluminum busbar 8, the metal connecting piece 1 can also be preferably made of copper-aluminum composite plate. During installation, the aluminum side of the metal connecting piece 1 is attached to the aluminum busbar 8, and the copper side of the metal connecting piece 1 is attached to the copper cable 10. The purpose is to achieve an aluminum-copper transition and ensure stable power supply. The metal connecting piece 1 is formed by stamping or cutting. The width of the metal connecting piece 1 is 12mm~150mm wider than the width of the insulating partition 2. The part exceeding the width of the insulating partition 2 should have at least one wiring hole. The wiring hole should be a circular hole with a diameter of 8.4mm~21mm, or a square hole with a side length of 8.4mm~21mm.

[0035] S3: Install the improved busbar connector: First, remove the faulty busbar body 11 and its connectors at both ends. Insert one side of the two improved busbar connectors into the ends of the intact upper busbar body 5 and lower busbar body 9, respectively. Inside the busbar connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use locking bolts 3 with a diameter of 8mm~14mm with the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, and the mounting holes on the metal connecting plates 1 to tighten them.

[0036] S4: Circuit connection: Jump out the main body 11 of the faulty busbar trunking, and use cable 10 to connect the wiring holes of the metal connecting piece 1 on the upper and lower busbar trunking connectors one by one to connect the busbar trunking. At the same time, use cable 10 to lead out from the wiring hole on the metal connecting piece 1 on the upper or lower busbar trunking connector to the plug box 7 on the wall of the faulty busbar trunking area that has no plug-in parts, and further connect to the incoming terminal of the circuit breaker 701. Power supply is restored to the floor of the faulty busbar trunking.

[0037] S5: Assembly and debugging: Check whether the circuit connections of each phase are accurate and standardized. Use a multimeter to check that the connections are normal. Restore the unit power supply, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0038] Example 1: Unit 1 of Building 56, a 32-story office building in Gaoneng Residential Area, has 21 households per floor and a large electrical load. Due to the burnt-out of the busbar trunking on the 4th floor, emergency repairs are required on-site. Investigation revealed that the unit's power supply uses a three-phase four-wire high-strength plug-in busbar trunking system. The busbar trunking casing is grounded, with a rated voltage of 380V, a frequency of 50Hz, and a rated current of 1600A. Busbar trunking dimensions: width 255mm, height 270mm; four busbars 8 are made of copper plate, width 120mm, thickness 10mm; connector end plate 12 is 220mm long, 150mm wide, and 5mm thick, with two 22mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 80mm; insulating partition 2 is 200mm long, 150mm wide, and 10mm thick, with two 22mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 80mm; the original copper conductive connecting piece is 160mm long, 120mm wide, and 5mm thick, with two 30mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 80mm. Plug-in box 7: Dimensions: Height 500mm, Width 250mm, Side thickness 150mm; Circuit breaker rated current 250A; Meter box 6: Dimensions: Height 1040mm, Width 1546mm, Side thickness 155mm; Main floor switch rated current 250A. (For example...) Figure 1 As shown, the improved busbar connector in this embodiment uses a connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4, maintaining the original specifications and dimensions. The left and right copper metal connecting pieces 1 are bent (see details). Figure 2 , Figure 3 The metal connecting piece 1 replaces the original copper conductive connecting piece hidden inside the insulating partition 2. The positions and center distance of the two bolt connection mounting holes remain unchanged. The metal connecting piece 1 is 120mm wide, 5mm thick, and has a 34mm×26mm oblong hole with a 13mm radius. The center distance between the two mounting holes is 80mm, and the center distance of the mounting hole is 60mm from the bottom edge. The widest part of the metal connecting piece 1 perpendicular to the busbar 8 (including the lug 101) is 150mm higher than the width of the insulating partition 2 (vertical distance), that is, the widest part of the metal connecting piece 1 is 285mm (calculated as: 60mm from the center distance of the mounting hole of the metal connecting piece 1 to the bottom edge + 150mm / 2 of the width of the insulating partition 2 + 150mm of the exposed width of the insulating partition 2), leaving space for the wiring hole. The length of the metal connecting piece 1 parallel to the busbar 8 is 160mm. The portion of the left metal connecting piece 1 that exceeds the width of the insulating partition 2 by 150mm is provided with three wiring holes, a combination of two square wiring holes and one cylindrical 102 (see details). Figure 2The lug 101 is a 30mm x 30mm square with different diameter square wiring holes on both sides, with side lengths of 20.5mm and 10.5mm respectively. The cylinder 102 has an outer diameter of 45.0mm, an inner diameter of 35.0mm, and a length of 85mm. The cylinder 102 is horizontally placed and welded together. The right metal connecting piece 1 has two square wiring holes extending 150mm beyond the width of the insulating partition 2 (see details). Figure 3 The lug 101 is a 30mm x 30mm square, with different diameter square wiring holes on both sides, with side lengths of 20.5mm and 10.5mm respectively, corresponding to the square wiring holes on the left metal connecting piece 1. The metal connecting piece 1 is made of copper plate and formed by stamping. For ease of installation, it is best to weld the lugs 101 on the upper part of the two bent metal connecting pieces 1 together using silver solder or copper solder. After welding the two bent metal connecting pieces 1, the lower gap is 10.2mm, which facilitates the metal connecting piece 1 to be snapped onto the busbar 8 in one step. To ensure a better and more secure connection between the busbar 8 and the metal connecting piece 1, a mounting hole with a diameter of 22mm is drilled in the middle of the end of the busbar 8. During installation, the two metal connecting pieces 1, separated by the insulating partition 2 inside the busbar slot connector, clamp each busbar 8 tightly. Then, a locking bolt 3 with a diameter of 14mm is passed through the mounting hole on the left connector end plate 12, and then through the mounting holes on the stacked insulating partition 2, the metal connecting piece 1, the busbar 8, and the right connector end plate 12 to secure it.

[0039] Combination Figure 1 , Figure 8 The emergency repair and installation operation steps in this embodiment are as follows:

[0040] 1. Hanging the plug box 7 without connectors: Install 12mm diameter expansion bolts on the wall in the fault busbar area, and hang the plug box 7. The plug box 7 should not contain connector assemblies; instead, assemble a 250A molded case circuit breaker 701 as usual. The cable 10 used for the plug box 7 should be 50mm². 2 The four-core cable has DTM50 copper terminals with 10.5mm screw holes pressed at both ends of each core (see GB / T14315-2008 standard dimensions) for easy wiring. The output terminal of circuit breaker 701 is connected to the DTM50 copper terminal at one end of the four-core cable 10 with a 10mm bolt. The other end of the four-core cable 10 is then connected to the DTM50 copper terminal at the other end of the four-core cable 10 with a 10mm bolt to the input terminal of the 250A floor main switch 601 inside meter box 6. The output terminal of main switch 601 is then connected to the incoming meter 602 via cable 10.

[0041] 2. Prefabricated metal connecting piece 1: Made of 5mm thick copper plate, two pieces on the left and right sides form a set of metal connecting pieces 1, which are stamped into a bent shape by a stamping machine (see details). Figure 2 , Figure 3 The specific parameters are as follows: the stamped bolt mounting hole is a 34mm×26mm oblong hole with a 13mm radius, and the center of the mounting hole is 60mm from the bottom edge; the widest part of the metal connecting piece 1, including the lug 101, perpendicular to the busbar 8 is 285mm, and the length parallel to the busbar 8 is 160mm; thus, when the metal connecting piece 1 is attached to the insulating partition 2, the exposed width of the insulating partition 2 is 150mm, and the hidden width inside the insulating partition 2 is 135mm. The lug 101 stamped from the metal connecting piece 1 is a 30mm×30mm square, with two square wiring holes of 20.5mm×20.5mm and 10.5mm×10.5mm corresponding to it, facilitating the use of M20 and M10 semi-circular head square neck bolts to clamp onto the square wiring holes, thus facilitating the connection of the cable 10. During manufacturing, the wiring holes on each set of metal connecting pieces 1 are staggered to facilitate wiring. Because there are a maximum of three electrical connections, to avoid parallel wiring, a cylindrical hole 102 is horizontally welded to the upper edge of one of the metal connecting pieces 1, forming a cylindrical wiring hole. The outer diameter of the cylindrical hole 102 is 45.0 mm, the inner diameter is 35.0 mm, and the length is 85 mm, so as to supply 630 mm... 2 The copper core cable 10 is inserted, and two threaded wire fixing holes are drilled in the body of the cylinder 102 (see details). Figure 2 After the cable 10 is inserted, it is fixed with screws. For ease of installation, it is best to pre-weld the upper lugs 101 of the two bent metal connecting pieces 1 together with silver solder or copper solder. After the two bent metal connecting pieces 1 are welded, the gap at the bottom is 10.2mm, which makes it easy for the metal connecting piece 1 to be snapped onto the busbar 8.

[0042] 3. Install the improved busbar connectors: First, remove the faulty busbar body 11 and its connectors at both ends. Insert one side of each of the two improved busbar connectors into the ends of the intact upper busbar body 5 and lower busbar body 9, respectively. Inside the busbar connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use a 14mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting plates 1, and the mounting holes on the busbar 8 to tighten them.

[0043] 4. Circuit Connection: The faulty busbar trunking body 11 is disconnected. The upper busbar trunking body 5 and the lower busbar trunking body 9 use a 630mm... 2 The single-core cable is connected in 10-way configuration. Each single-core cable has 21mm diameter DTM630 copper terminal blocks crimped at both ends (see GB / T14315-2008 standard dimensions for details). The 630mm diameter terminal blocks are then secured using M20 semi-circular head square neck bolts. 2Single-core cable 10 is connected one-to-one to the 20.5mm × 20.5mm square wiring holes of the metal connecting piece 1 on the upper and lower busbar connectors to connect the busbar and ground the busbar casing. Simultaneously, DTM50 copper terminals are connected together using M10 semi-circular head square neck bolts through another 10.5mm × 10.5mm square wiring hole on the metal connecting piece 1 of either the upper or lower busbar connector. The 50mm... 2 Cable 10 is led out to a plug box 7 on the wall of the fault busbar area that has no plugs, and is further connected to the incoming terminal of circuit breaker 701, so that the floor of the fault busbar is energized.

[0044] 5. Assembly and debugging: Check whether the circuit connection of each phase is accurate and standardized. Use a multimeter to check that the connection is normal. Restore the power supply to the unit, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0045] Example 2: Unit 1 of Building 8, a 26-story residential building in Yutiancheng Community. Each floor of this unit has 12 households and a large electrical load. Due to the burnt-out of the busbar trunking on the 12th floor, emergency repairs are required on-site. Investigation revealed that the unit's power supply uses a three-phase five-wire air-insulated plug-in busbar trunking with a rated voltage of 380V, a frequency of 50Hz AC power, and a rated current of 1250A. Busbar trunking dimensions: width 275mm, height 230mm; five busbars 8 are made of copper plates, four of which are 100mm wide and 8mm thick, and one grounding busbar 8 is 100mm wide and 4mm thick; connector end plate 12 is 200mm long, 130mm wide, and 5mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; insulating partition 2 is 180mm long, 130mm wide, and 10mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; the original copper conductive connecting piece is 140mm long, 100mm wide, and 4mm thick, with two 30mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, the center distance is 60mm, and the center of the mounting hole is 50mm from the bottom edge. Plug-in box 7 dimensions: Height 500mm, Width 250mm, Side thickness 150mm; Circuit breaker rated current 200A. Meter box 6 dimensions: Height 1040mm, Width 1016mm, Side thickness 155mm; Main floor switch rated current 200A. (The last sentence appears to be a separate, unrelated statement.) Figure 1 As shown, the improved busbar connector in this embodiment uses a connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4, maintaining the original specifications and dimensions. The left and right copper metal connecting pieces 1 are bent (see details). Figure 2 , Figure 3The metal connecting piece 1 replaces the original copper conductive connecting piece hidden inside the insulating partition 2. The positions and center distance of the two bolt connection mounting holes remain unchanged. The metal connecting piece 1 is 100mm wide, 4mm thick, and has a 32mm×22mm oblong hole with a radius of 11mm. The center distance between the two mounting holes is 60mm, and the center distance of the mounting hole is 50mm from the bottom edge. The widest part of the metal connecting piece 1 perpendicular to the busbar 8 (including the lug 101) is 130mm higher than the width of the insulating partition 2 (vertical distance), that is, the widest part of the metal connecting piece 1 is 245mm (calculated as: 50mm from the center distance of the mounting hole of the metal connecting piece 1 to the bottom edge + 130mm / 2 of the width of the insulating partition 2 + 130mm of the exposed width of the insulating partition 2), leaving space for the wiring hole. The length of the metal connecting piece 1 parallel to the busbar 8 remains unchanged at 140mm. The portion of the left metal connecting piece 1 that exceeds the width of the insulating partition 2 by 130mm is provided with three wiring holes, consisting of a combination of two square wiring holes and one cylindrical 102 (see details). Figure 2 The lug 101 is a rectangle 35mm high and 25mm wide, with different diameter square wiring holes on both sides, with side lengths of 20.5mm and 10.5mm respectively. The cylinder 102 has an outer diameter of 34.0mm, an inner diameter of 26.0mm, and a length of 70mm. The metal connecting piece 1 is made of copper plate and formed by stamping. The central cylindrical wiring hole is welded together with the cylinder 102 placed horizontally. The right metal connecting piece 1 has two square wiring holes extending 130mm beyond the width of the insulating partition 2 (see details). Figure 3 The lug 101 is a rectangle 35mm high and 25mm wide. The square wiring holes on both sides have different diameters, with side lengths of 20.5mm and 10.5mm respectively, corresponding to the square wiring holes on the left metal connecting piece 1. A 20mm diameter mounting hole is drilled in the middle of the end of the busbar 8. During installation, the left and right metal connecting pieces 1, separated by the insulating partition 2 inside the busbar slot connector, clamp each busbar 8 tightly. Then, a 12mm diameter locking bolt 3 of the set bolt insulating sleeve 4 is passed through the mounting holes on the left and right connector end plates 12, clamping the stacked insulating partition 2, the mounting holes on the metal connecting piece 1, and the mounting holes on the busbar 8 for fastening.

[0046] Combination Figure 1 , Figure 8 The emergency repair and installation operation steps in this embodiment are as follows:

[0047] 1. Hanging the plug box 7 without connectors: Install 10mm diameter expansion bolts on the wall in the faulty busbar area, and hang the plug box 7. The plug box 7 should not contain connector assemblies; instead, assemble a 200A molded case circuit breaker 701 as usual. The plug box 7 uses 50mm² cable 10. 2The five-core cable has DTM50 copper terminals with 10.5mm screw holes pressed at both ends of each core for easy wiring. The output terminal of circuit breaker 701 is connected to the DTM50 copper terminal at one end of the five-core cable 10 using a 10mm bolt. The other end of the five-core cable 10 is then connected to the DTM50 copper terminal at the other end of the five-core cable 10 using a 10mm bolt to the input terminal of the 200A floor main switch 601 inside meter box 6. The output terminal of main switch 601 is then connected to the incoming meter 602 using cable 10.

[0048] 2. Prefabricated metal connecting piece 1: Made of 4mm thick copper plate, two pieces on the left and right sides form a set of metal connecting pieces 1, which are stamped into a bent shape by a stamping machine (see details). Figure 2 , Figure 3 The specific parameters are as follows: the stamped bolt mounting holes are 32mm × 22mm, oblong holes with a corner radius of 11mm, and the center of the mounting hole is 50mm from the bottom edge; the widest part of the metal connecting piece 1, including the lug 101, perpendicular to the busbar 8 is 245mm, and the length parallel to the busbar 8 is 140mm; thus, when the metal connecting piece 1 is attached to the insulating partition 2, the exposed width of the insulating partition 2 is 130mm, and the width hidden inside the insulating partition 2 is 115mm; the lugs 101 stamped from the left and right metal connecting pieces 1 are rectangles 35mm high and 25mm wide, with two square wiring holes of 20.5mm × 20.5mm and 10.5mm × 10.5mm corresponding to them, facilitating the use of M20 and M10 semi-circular head square neck bolts to clamp onto the square wiring holes, thus facilitating the connection of the cable 10. During manufacturing, the wiring holes on each set of metal connecting pieces 1 are staggered to facilitate wiring. Because there are a maximum of three electrical connections, to avoid parallel wiring, a cylindrical hole 102 is horizontally welded to the upper edge of one of the metal connecting pieces 1, forming a cylindrical wiring hole. The outer diameter of the cylindrical hole 102 is 34.0 mm, the inner diameter is 26.0 mm, and the length is 70 mm, so as to supply a 400 mm... 2 The copper core cable 10 is inserted. Two threaded wire fixing holes are drilled in the cylinder 102 (see details). Figure 2 After cable 10 is inserted, it is secured with screws;

[0049] 3. Install the improved busbar trunking connectors: First, remove the faulty busbar trunking body 11 and its connectors at both ends. Insert one side of each of the two improved busbar trunking connectors into the ends of the intact upper busbar trunking body 5 and lower busbar trunking body 9, respectively. Inside the busbar trunking connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use a 12mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting plates 1, and the mounting holes on the busbar 8 to tighten them.

[0050] 4. Circuit Connection: The faulty busbar trunking body 11 is disconnected; the upper busbar trunking body 5 and the lower busbar trunking body 9 use a 400mm... 2 The single-core cable is connected in 10-way configuration. Each single-core cable has 21mm diameter DTM400 copper terminal blocks crimped at both ends (see GB / T14315-2008 standard dimensions for details). Use M20 semi-circular head square neck bolts to connect the 400mm... 2 Single-core cable 10 is connected one-to-one to the 20.5mm × 20.5mm square wiring holes of the metal connecting piece 1 on the upper and lower busbar connectors to connect and ground the busbar. Simultaneously, the DTM50 copper terminals are connected together using an M10 semi-circular head square neck bolt from another 10.5mm × 10.5mm square wiring hole on the metal connecting piece 1 of either the upper or lower busbar connector. The 50mm... 2 Cable 10 is led out to a plug box 7 on the wall of the fault busbar area that has no plugs, and is further connected to the incoming terminal of circuit breaker 701, so that the floor of the fault busbar is energized.

[0051] 5. Assembly and debugging: Check whether the circuit connection of each phase is accurate and standardized. Use a multimeter to check that the connection is normal. Restore the power supply to the unit, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0052] Example 3: Unit 1 of Building 9, a 26-story residential building in Baoshi Park No. 1 Community, has 9 households per floor. Due to the burnt-out busbar trunking on the 8th floor, emergency repairs are required on-site. Investigation revealed that the unit's power supply uses a three-phase four-wire compact insulated plug-in busbar trunking system. The busbar trunking casing is grounded, with a rated voltage of 380V, a frequency of 50Hz, and a rated current of 1000A. Busbar trunking dimensions: width 255mm, height 220mm; four busbars 8 are made of copper plate, width 80mm, thickness 6mm; connector end plate 12 is 180mm long, 110mm wide, and 5mm thick, with a 20mm diameter bolt mounting hole in the center, and the center point of the mounting hole is equidistant from all sides; insulating partition 2 is 160mm long, 110mm wide, and 10mm thick, with a 20mm diameter bolt mounting hole in the center, and the center point of the mounting hole is equidistant from all sides; the original copper conductive connecting piece is 120mm long, 80mm wide, and 3mm thick, with a 28mm diameter bolt mounting hole in the center, and the center point of the mounting hole is equidistant from all sides. Plug-in box 7: Dimensions: Height 500mm, Width 250mm, Side thickness 150mm; Circuit breaker rated current 150A; Meter box 6: Dimensions: Height 1040mm, Width 810mm, Side thickness 155mm; Main floor switch rated current 150A. (For example...) Figure 7The improved busbar connector in this embodiment uses a connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4, maintaining the original specifications and dimensions. The two copper metal connecting pieces 1 use flat single-bolt mounting holes (see details). Figure 5 The metal connecting piece 1 replaces the original copper conductive connecting piece hidden inside the insulating partition 2. The bolt connection mounting hole positions remain unchanged. The metal connecting piece 1 is 80mm wide, 3mm thick, and has a 32mm×22mm oblong hole with a corner radius of 11mm. The center of the mounting hole is 40mm from the bottom edge. The metal connecting piece 1 extends 110mm above the insulating partition 2 in the perpendicular direction to the busbar 8, i.e., the width of the metal connecting piece 1 is 205mm (calculated as: 40mm from the bottom edge of the mounting hole of the metal connecting piece 1 + 110mm / 2 of the width of the insulating partition 2 + 110mm of the exposed width of the insulating partition 2), leaving space for the wiring hole. The length of the metal connecting piece 1 parallel to the busbar 8 is 120mm. The portions of the left and right metal connecting pieces 1 that extend 110mm beyond the width of the insulating partition 2 are respectively provided with three circular wiring holes (see details). Figure 5 The two circular wiring holes on both sides have the same diameter of 20.5mm, which facilitates the connection of thick cables and meets the power supply requirements after the conductive busbar 8 in the busbar trunking is connected with cable 10. The diameter of the middle circular wiring hole is 10.5mm, which is used to connect the corresponding cable 10 to the plug box 7. The metal connecting piece 1 is made of copper plate and is formed by stamping. During installation, the upper edge of the inner side of the insulating partition 2 is first ground off to make it easier for the two metal connecting pieces 1 on the left and right sides to be flat with the busbar 8. The two metal connecting pieces 1 on the left and right sides of the busbar trunking connector are separated by the insulating partition 2 and clamp each busbar 8 tightly. Then, the locking bolt 3 with a diameter of 10mm of the set bolt insulating sleeve 4 is passed through the mounting hole on the left connector end plate 12, and then through the mounting holes on the stacked insulating partition 2, the metal connecting piece 1, and the right connector end plate 12 to be fastened.

[0053] Combination Figure 5 ,refer to Figure 7 , Figure 8 (The double-bolt mounting hole connector in the diagram replaces the single-bolt mounting hole busbar connector in this embodiment.) The emergency repair and installation operation steps in this embodiment are as follows:

[0054] 1. Hanging the plug box 7 without connectors: Install 10mm diameter expansion bolts on the wall in the fault busbar area, and hang the plug box 7. The plug box 7 should not contain connector assemblies; instead, assemble a 150A molded case circuit breaker 701 as usual. The plug box 7 uses 35mm² cable 10. 2The four-core cable has DTM35 copper terminals with 10.5mm screw holes pressed at both ends of each core (see GB / T14315-2008 standard dimensions) for easy wiring. The output terminal of circuit breaker 701 is connected to the DTM35 copper terminal at one end of the four-core cable 10 using a 10mm bolt. The other end of the four-core cable 10 is then connected to the DTM35 copper terminal at the other end of the four-core cable 10 using a 10mm bolt to the input terminal of the 150A floor main switch 601 inside meter box 6. The output terminal of main switch 601 is then connected to the incoming meter 602 using cable 10.

[0055] 2. Prefabricated metal connecting piece 1: Made of 3mm thick copper plate, two pieces on the left and right sides form a set of metal connecting pieces 1, which are stamped by a stamping machine (see details). Figure 5 The specific parameters are as follows: the stamped bolt mounting hole is a 32mm×22mm oblong hole with a rounded corner radius of 11mm, and the center of the mounting hole is 40mm from the bottom edge; the width of the metal connecting piece 1 perpendicular to the busbar 8 is 205mm, and the length parallel to the busbar 8 is 120mm; thus, when the metal connecting piece 1 is attached to the insulating partition 2, the exposed width of the insulating partition 2 is 110mm, and the width hidden inside the insulating partition 2 is 95mm. The diameter of the middle wiring hole stamped out of the metal connecting piece 1 is 10.5mm, and the diameter of the wiring holes on both sides is 20.5mm, which facilitates the connection with M10 and M20 bolts. During manufacturing, the wiring holes on each set of metal connecting pieces 1 are staggered to facilitate wiring.

[0056] 3. Install the improved busbar trunking connectors: First, remove the faulty busbar trunking body 11 and its connectors at both ends. Insert one side of each of the two improved busbar trunking connectors into the ends of the intact upper busbar trunking body 5 and lower busbar trunking body 9, respectively. Inside the busbar trunking connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use a 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, and the mounting holes on the metal connecting plates 1 to tighten them.

[0057] 4. Circuit Connection: The faulty busbar trunking body 11 is disconnected; the upper busbar trunking body 5 and the lower busbar trunking body 9 use a 300mm... 2 The single-core cable is connected in 10-way configuration. Each single-core cable has 21mm diameter DTM300 copper terminal blocks crimped to both ends (see GB / T14315-2008 standard dimensions for details). Use M20 bolts to connect the 300mm... 2The DTM300 copper terminals on the single-core cable 10 are connected one-to-one to the 20.5mm diameter circular wiring holes of the metal connecting pieces 1 on the upper and lower busbar connectors to connect the busbars. During installation, it is best to insert the lugs of the DTM300 copper terminals between the mounting holes of the two metal connecting pieces 1 on each busbar 8 to ensure a tight fit. The busbar casing is grounded. Simultaneously, the DTM35 copper terminals are connected together using M10 bolts from another 10.5mm diameter circular wiring hole on the metal connecting piece 1 of either the upper or lower busbar connector. The 35mm diameter of the DTM35 copper terminals... 2 Cable 10 is led out to a plug box 7 on the wall of the fault busbar area that has no plugs, and is further connected to the incoming terminal of circuit breaker 701, so that the floor of the fault busbar is energized.

[0058] 5. Assembly and debugging: Check whether the circuit connection of each phase is accurate and standardized. Use a multimeter to check that the connection is normal. Restore the power supply to the unit, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0059] Example 4: Unit 1 of Building 2, a 15-story residential building in Yishui Tiancheng Community, has 6 households per floor. Due to the burnt-out busbar trunking on the 7th floor, emergency repairs are required on-site. Investigation revealed that the unit's power supply uses a three-phase four-wire air-insulated busbar trunking system with grounded casing, rated voltage 380V, frequency 50Hz AC power supply, and rated current 800A. Busbar trunking dimensions: width 255mm, height 190mm; four busbars 8 are made of aluminum plate, width 60mm, thickness 8mm; connector end plate 12 is 160mm long, 90mm wide, and 5mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; insulating partition 2 is 140mm long, 90mm wide, and 10mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; the original aluminum conductive connecting piece is 120mm long, 60mm wide, and 4mm thick, with two 30mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm. Plug-in box 7: Dimensions: Height 500mm, Width 250mm, Side thickness 150mm; Circuit breaker rated current 150A; Meter box 6: Dimensions: Height 1040mm, Width 648mm, Side thickness 155mm; Main floor switch rated current 150A. (For example...) Figure 1 As shown, the improved busbar connector in this embodiment uses a connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4, maintaining the original specifications and dimensions. The two sets of copper-aluminum composite metal connecting plates 1 on the left and right sides are flat (see details). Figure 6The metal connecting piece 1 replaces the original aluminum conductive connecting piece hidden inside the insulating partition 2. The positions and center distance of the two bolt connection mounting holes remain unchanged. The metal connecting piece 1 is 60mm wide and 4mm thick, with a 30mm×20mm oblong hole and a 10mm radius. The center distance between the two mounting holes is 60mm, and the center distance of the mounting hole is 30mm from the bottom edge. The width of the metal connecting piece 1 perpendicular to the busbar 8 (including the lug 101) is 100mm wider than the width of the insulating partition 2, that is, the maximum width of the metal connecting piece 1 is 175mm (calculated as: 30mm from the center distance of the mounting hole of the metal connecting piece 1 to the bottom edge + 90mm / 2 of the width of the insulating partition 2 + 100mm of the width exposed from the insulating partition 2), leaving space for the wiring hole. The length of the metal connecting piece 1 parallel to the busbar 8 is 120mm. The lug 101 on the part of the left and right metal connecting pieces 1 that exceeds the width of the insulating partition 2 by 100mm has three corresponding circular wiring holes (see details). Figure 6 The two circular wiring holes on both sides have the same diameter of 16.5mm, which facilitates the connection of thick cables and meets the power supply requirements after the conductive busbar 8 in the busbar trunking is connected with cable 10. The middle circular wiring hole has a diameter of 10.5mm and is used for connecting the corresponding cable 10 to the plug-in box 7. The mounting lug 101 is a 40mm×40mm square. In order to better and more firmly connect the busbar 8 and the metal connecting piece 1, a mounting hole with a diameter of 20mm is drilled in the middle of the end of the busbar 8. The metal connecting piece 1 is made of copper-aluminum composite plate and is formed by stamping. During installation, first grind off the upper edge of the inner side of the insulating partition 2 to make it easier for the left and right metal connecting pieces 1 to be flat with the busbar 8. Inside the busbar slot connector, the left and right metal connecting pieces 1, separated by the insulating partition 2, clamp each busbar 8 tightly. Then, use the 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting hole on the left connector end plate 12, and then pass through the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting pieces 1, the mounting holes on the busbar 8, and the mounting holes on the right connector end plate 12 to tighten.

[0060] Combination Figure 5 ,refer to Figure 1 , Figure 8 The emergency repair and installation operation steps in this embodiment are as follows:

[0061] 1. Hanging the plug box 7 without connectors: Install 10mm diameter expansion bolts on the wall in the fault busbar area, and hang the plug box 7. The plug box 7 should not contain connector assemblies; instead, assemble a 150A molded case circuit breaker 701 as usual. The plug box 7 uses 35mm² cable 10. 2The four-core cable has DTM35 copper terminals with 10.5mm screw holes pressed at both ends of each core for easy wiring. The output terminal of the circuit breaker 701 is connected to the DTM35 copper terminal of one end of the four-core cable 10 with a 10mm bolt, and then the DTM35 copper terminal of the other end of the four-core cable 10 is connected to the input terminal of the 150A floor main switch 601 in the meter box 6 with a 10mm bolt. The output terminal of the main switch 601 is then connected to the incoming meter 602 with cable 10.

[0062] 2. Prefabricated metal connecting plate 1: Made of 4mm thick copper-aluminum composite plate, the left and right metal connecting plates 1 are stamped into flat plates by a stamping machine (see details). Figure 6 The specific parameters are as follows: the stamped bolt mounting hole is a 30mm×20mm oblong hole with a 10mm radius, and the center of the mounting hole is 30mm from the bottom edge; the widest part of the metal connecting piece 1, including the lug 101, perpendicular to the busbar 8 is 175mm, and the length parallel to the busbar 8 is 120mm; thus, when the metal connecting piece 1 is attached to the insulating partition 2, the exposed width of the insulating partition 2 is 100mm, and the width hidden inside the insulating partition 2 is 75mm. The lug 101 stamped from the metal connecting piece 1 is a 40mm×40mm square, with the corresponding wiring holes on the two upper sides having a diameter of 16.5mm and the corresponding wiring hole in the middle having a diameter of 10.5mm. M16 and M10 bolts are used to connect the cable 10. During manufacturing, the wiring holes on each set of metal connecting pieces 1 are staggered to facilitate wiring.

[0063] 3. Install the improved busbar connectors: First, remove the faulty busbar body 11 and its connectors at both ends. Insert one side of each of the two improved busbar connectors into the ends of the intact upper busbar body 5 and lower busbar body 9, respectively. Inside the busbar connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use a 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting plates 1, and the mounting holes on the busbar 8 to tighten them.

[0064] 4. Circuit Connection: The faulty busbar trunking body 11 is disconnected. The upper busbar trunking body 5 and the lower busbar trunking body 9 use a 240mm... 2 The single-core cable is connected in 10-way configuration. Each single-core cable has 16.5mm diameter DTM240 copper terminal blocks crimped to both ends (see GB / T14315-2008 standard dimensions for details). Use M16 bolts to connect the 240mm... 2The DTM240 copper terminals on the single-core cable 10 are connected one-to-one to the 16.5mm diameter wiring holes of the metal connecting pieces 1 on the upper and lower busbar connectors to connect the busbars. During installation, it is best to clamp the lugs of the DTM240 copper terminals with the mounting holes of the two metal connecting pieces 1 on each busbar 8 to enhance the connection fit. The busbar casing is grounded. Simultaneously, the DTM35 copper terminals are connected together using M10 bolts through another 10.5mm diameter wiring hole on the metal connecting piece 1 of either the upper or lower busbar connector. The 35mm diameter of the DTM35 copper terminals... 2 Cable 10 is led out to a plug box 7 on the wall of the fault busbar area that has no plugs, and is further connected to the incoming terminal of circuit breaker 701, so that the floor of the fault busbar is energized.

[0065] 5. Assembly and debugging: Check whether the circuit connection of each phase is accurate and standardized. Use a multimeter to check that the connection is normal. Restore the power supply to the unit, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0066] Example 5: Unit 3 of Building 9, 11-story residential building in Bailucun Community. Each floor of this unit has 4 households. Due to the burnt-out busbar trunking on the 5th floor, emergency repairs are required on site. Investigation revealed that the unit's power supply uses a three-phase four-wire air-insulated busbar trunking system. The busbar trunking casing is grounded, with a rated voltage of 380V, a frequency of 50Hz, and a rated current of 630A. Busbar trunking dimensions: width 175mm, height 130mm; four busbars 8 are made of aluminum plate, width 60mm, thickness 6mm; connector end plate 12 is 160mm long, 90mm wide, and 5mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; insulating partition 2 is 140mm long, 90mm wide, and 10mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; the original aluminum conductive connecting piece is 120mm long, 60mm wide, and 3mm thick, with two 30mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm. Plug-in box 7: Dimensions: Height 500mm, Width 250mm, Side thickness 150mm; Circuit breaker rated current 100A; Meter box 6: Dimensions: Height 780mm, Width 648mm, Side thickness 155mm; Main floor switch rated current 100A. (For example...) Figure 1 As shown, the improved busbar connector in this embodiment uses a connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4, maintaining the original specifications and dimensions. The two sets of aluminum metal connecting pieces 1 on the left and right sides are flat (see details). Figure 6The metal connecting piece 1 replaces the original aluminum conductive connecting piece hidden inside the insulating partition 2. The positions and center distance of the two bolt connection mounting holes remain unchanged. The metal connecting piece 1 is 60mm wide and 3mm thick, with a 30mm×20mm oblong hole and a 10mm radius. The center distance between the two mounting holes is 60mm, and the center distance of the mounting hole is 30mm from the bottom edge. The width of the metal connecting piece 1 perpendicular to the busbar 8 (including the lug 101) is 60mm wider than the width of the insulating partition 2, that is, the maximum width of the metal connecting piece 1 is 135mm (calculated as: 30mm from the center distance of the mounting hole of the metal connecting piece 1 to the bottom edge + 90mm / 2 of the width of the insulating partition 2 + 60mm of the width exposed from the insulating partition 2), leaving space for the wiring hole. The length of the metal connecting piece 1 parallel to the busbar 8 is 120mm. The lug 101 on the 60mm portion of the left and right metal connecting pieces 1 that exceeds the width of the insulating partition 2 has three corresponding circular wiring holes (see details). Figure 6 The two circular wiring holes on both sides have the same diameter of 16.5mm, which facilitates the connection of thick cables and meets the power supply requirements after the conductive busbar 8 in the busbar trunking is connected with cable 10. The diameter of the middle circular wiring hole is 8.4mm, which is used for the corresponding cable 10 to connect to the plug-in box 7. The mounting lug 101 is a rectangle of 60mm×40mm. In order to better and more firmly connect the busbar 8 and the metal connecting piece 1, a mounting hole with a diameter of 20mm is drilled in the middle of the end of the busbar 8. The metal connecting piece 1 is made of copper-aluminum composite plate and is formed by stamping. During installation, first grind off the upper edge of the inner side of the insulating partition 2 to make it easier for the left and right metal connecting pieces 1 to be flat with the busbar 8. Inside the busbar slot connector, the left and right metal connecting pieces 1, separated by the insulating partition 2, clamp each busbar 8 tightly. Then, use the 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting hole on the left connector end plate 12, and then pass through the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting pieces 1, the mounting holes on the busbar 8, and the mounting holes on the right connector end plate 12 to tighten.

[0067] Combination Figure 5 ,refer to Figure 1 , Figure 8 The emergency repair and installation operation steps in this embodiment are as follows:

[0068] 1. Hanging the plug box 7 without connectors: Install 8mm diameter expansion bolts on the wall in the faulty busbar area, and hang the plug box 7. The plug box 7 should not contain connector assemblies; instead, assemble a 100A molded case circuit breaker 701 as usual. The plug box 7 uses 25mm² cable 10. 2The four-core cable has DTM25 copper terminals with 8.4mm screw holes pressed at both ends of each core (see GB / T14315-2008 standard dimensions) for easy wiring. The output terminal of circuit breaker 701 is connected to the DTM25 copper terminal at one end of the four-core cable 10 using an 8mm bolt. The other end of the four-core cable 10 is then connected to the DTM25 copper terminal at the other end of the four-core cable 10 using an 8mm bolt to the input terminal of the 100A floor main switch 601 inside meter box 6. The output terminal of main switch 601 is then connected to the incoming meter 602 using cable 10.

[0069] 2. Prefabricated metal connecting piece 1: Made of 3mm thick aluminum plate, the left and right metal connecting pieces 1 are stamped into flat plates by a stamping machine (see details). Figure 6 The specific parameters are as follows: the stamped bolt mounting hole is a 30mm × 20mm oblong hole with a 10mm radius, and the center of the mounting hole is 30mm from the bottom edge; the widest part of the metal connecting piece 1, including the lug 101, perpendicular to the busbar 8 is 135mm, and the length parallel to the busbar 8 is 120mm; thus, when the metal connecting piece 1 is attached to the insulating partition 2, the exposed width of the insulating partition 2 is 60mm, and the width hidden inside the insulating partition 2 is 75mm. The lug 101 stamped from the metal connecting piece 1 is a 60mm × 40mm rectangle, with the corresponding wiring holes on the two upper sides having a diameter of 16.5mm and the corresponding wiring hole in the middle having a diameter of 8.4mm. M16 and M8 bolts are used to connect the cable 10. During manufacturing, the wiring holes on each set of metal connecting pieces 1 are staggered to facilitate wiring.

[0070] 3. Install the improved busbar connectors: First, remove the faulty busbar body 11 and its connectors at both ends. Insert one side of each of the two improved busbar connectors into the ends of the intact upper busbar body 5 and lower busbar body 9, respectively. Inside the busbar connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use a 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting plates 1, and the mounting holes on the busbar 8 to tighten them.

[0071] 4. Circuit Connection: The faulty busbar trunking body 11 is disconnected; the upper busbar trunking body 5 and the lower busbar trunking body 9 use a 185mm... 2 The single-core cable is connected in 10-way configuration. Each single-core cable has 16.5mm diameter DTM185 copper terminal blocks crimped to both ends (see GB / T14315-2008 standard dimensions for details). The 185mm diameter terminals are then secured with M16 bolts. 2The DTM185 copper terminals on the single-core cable 10 are connected one-to-one to the 16.5mm diameter wiring holes of the metal connecting pieces 1 on the upper and lower busbar connectors to connect the busbars. During installation, it is best to clamp the lugs of the DTM185 copper terminals with the mounting holes of the two metal connecting pieces 1 on each busbar 8 to enhance the connection fit. The busbar casing is grounded. Simultaneously, the DTM25 copper terminals are connected together using M8 bolts through another 8.4mm diameter wiring hole on the metal connecting piece 1 of either the upper or lower busbar connector. The 25mm diameter of the DTM25 copper terminals... 2 Cable 10 is led out to a plug box 7 on the wall of the fault busbar area that has no plugs, and is further connected to the incoming terminal of circuit breaker 701, so that the floor of the fault busbar is energized.

[0072] 5. Assembly and debugging: Check whether the circuit connection of each phase is accurate and standardized. Use a multimeter to check that the connection is normal. Restore the power supply to the unit, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0073] Example 6: Unit 2 of Building 3, a 9-story residential building in the Gaoneng Community, has 2 households per floor. Due to the burnt-out busbar trunking on the 8th floor, emergency repairs are required on-site. Investigation revealed that the unit's power supply uses a three-phase four-wire air-insulated busbar trunking system with grounded casing, rated voltage 380V, frequency 50Hz AC power, and rated current 400A. Busbar trunking dimensions: width 175mm, height 110mm; four busbars 8 are made of aluminum plate, width 40mm, thickness 6mm; connector end plate 12 is 160mm long, 70mm wide, and 5mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; insulating partition 2 is 140mm long, 70mm wide, and 10mm thick, with two 20mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm; the original aluminum conductive connecting piece is 120mm long, 40mm wide, and 3mm thick, with two 30mm diameter mounting holes in the middle, the center points of the two mounting holes are equidistant from the edge, and the center distance is 60mm. Plug-in box 7: Dimensions: Height 500mm, Width 250mm, Side thickness 150mm; Circuit breaker rated current 100A; Meter box 6: Dimensions: Height 640mm, Width 535mm, Side thickness 140mm; Main floor switch rated current 100A. (For example...) Figure 1 As shown, the improved busbar connector in this embodiment uses a connector end plate 12, insulating partition 2, locking bolt 3, and bolt insulating sleeve 4, maintaining the original specifications and dimensions. The two sets of aluminum metal connecting pieces 1 on the left and right sides are flat (see details). Figure 6The original aluminum conductive connecting piece hidden in the insulating partition 2 is replaced. The position and center distance of the two bolt connection mounting holes remain unchanged. The metal connecting piece 1 is 40mm wide, 3mm thick, and has a 30mm×20mm hole with a 10mm rounded corner radius. The center distance between the two mounting holes is 60mm, and the center distance of the mounting hole is 20mm from the bottom edge. Figure 6 Three lugs 101 are provided on the left and right metal connecting plates 1 extending beyond the width of the insulating partition 2. The two side lugs 101 are 25mm × 25mm squares with corresponding 14.5mm diameter circular wiring holes for connecting thick cables, meeting the power supply requirements of the conductive busbar 8 connected to the cable 10 in the busbar trough. The middle lug 101 is 12mm × 12mm square with corresponding 8.4mm diameter circular wiring holes for connecting the corresponding cable 10 to the plug-in box 7. The length of the metal connecting plate 1 parallel to the busbar 8 is 120mm. To ensure a better and more secure connection between the busbar 8 and the metal connecting plate 1, a 20mm diameter mounting hole is drilled in the middle of the end of the busbar 8. The metal connecting plate 1 is made of aluminum sheet and formed by stamping. During installation, first grind off the upper edge of the inner side of the insulating partition 2 to make it easier for the left and right metal connecting pieces 1 to be flat with the busbar 8. Inside the busbar slot connector, the left and right metal connecting pieces 1, separated by the insulating partition 2, clamp each busbar 8 tightly. Then, use the 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting hole on the left connector end plate 12, and then pass through the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting pieces 1, the mounting holes on the busbar 8, and the mounting holes on the right connector end plate 12 to tighten.

[0074] Combination Figure 5 ,refer to Figure 1 , Figure 8 The emergency repair and installation operation steps in this embodiment are as follows:

[0075] 1. Hanging the plug box 7 without connectors: Install 8mm diameter expansion bolts on the wall in the faulty busbar area, and hang the plug box 7. The plug box 7 should not contain connector assemblies; instead, assemble a 100A molded case circuit breaker 701 as usual. The plug box 7 uses 25mm² cable 10. 2 The four-core cable has DTM25 copper terminals with 8.4mm screw holes pressed at both ends of each core (see GB / T14315-2008 standard dimensions) for easy wiring. The output terminal of circuit breaker 701 is connected to the DTM25 copper terminal at one end of the four-core cable 10 using an 8mm bolt. The other end of the four-core cable 10 is then connected to the DTM25 copper terminal at the other end of the four-core cable 10 using an 8mm bolt to the input terminal of the 100A floor main switch 601 inside meter box 6. The output terminal of main switch 601 is then connected to the incoming meter 602 using cable 10.

[0076] 2. Prefabricated metal connecting piece 1: Made of 3mm thick aluminum plate, the left and right metal connecting pieces 1 are stamped or laser-cut into flat shapes (see details). Figure 6 The specific parameters are as follows: the bolt mounting holes are 30mm × 20mm, oblong with a 10mm radius, and the center of the mounting hole is 20mm from the bottom edge; the two side lugs 101 are 25mm × 25mm squares with corresponding 14.5mm diameter circular wiring holes; the middle lug 101 is a 12mm × 12mm square with corresponding 8.4mm diameter circular wiring holes; the length of the metal connecting piece 1 parallel to the busbar 8 is 120mm. M14 and M8 bolts are used to connect the cable 10. During manufacturing, the wiring holes on each set of metal connecting pieces 1 are staggered to facilitate wiring.

[0077] 3. Install the improved busbar connectors: First, remove the faulty busbar body 11 and its connectors at both ends. Insert one side of each of the two improved busbar connectors into the ends of the intact upper busbar body 5 and lower busbar body 9, respectively. Inside the busbar connector, two metal connecting plates 1 separated by insulating partition 2 clamp each busbar 8 tightly. Then, use a 10mm diameter locking bolt 3 of the set bolt insulating sleeve 4 to pass through the mounting holes on the two connector end plates 12, the mounting holes on the stacked insulating partition 2, the mounting holes on the metal connecting plates 1, and the mounting holes on the busbar 8 to tighten them.

[0078] 4. Circuit Connection: The faulty busbar trunking body 11 is disconnected; the upper busbar trunking body 5 and the lower busbar trunking body 9 use a 150mm... 2 The single-core cable is connected in 10-way configuration. Each single-core cable has 14.5mm diameter DTM150 copper terminal blocks crimped to both ends (see GB / T14315-2008 standard dimensions for details). Use M14 bolts to secure the 150mm... 2 The DTM150 copper terminals on the single-core cable 10 are connected one-to-one to the 14.5mm diameter wiring holes of the metal connecting pieces 1 on the upper and lower busbar connectors to connect the busbars. During installation, it is best to clamp the lugs of the DTM150 copper terminals with the mounting holes of the two metal connecting pieces 1 on each busbar 8 to enhance the connection fit. The busbar casing is grounded. Simultaneously, the DTM25 copper terminals are connected together using M8 bolts through another 8.4mm diameter wiring hole on the metal connecting piece 1 of either the upper or lower busbar connector. The 25mm diameter of the DTM25 copper terminals... 2 Cable 10 is led out to a plug box 7 on the wall of the fault busbar area that has no plugs, and is further connected to the incoming terminal of circuit breaker 701, so that the floor of the fault busbar is energized.

[0079] 5. Assembly and debugging: Check whether the circuit connection of each phase is accurate and standardized. Use a multimeter to check that the connection is normal. Restore the power supply to the unit, then close the circuit breaker 701 switch and check the current and voltage. If they are normal, supply power to the household meter box 6.

[0080] According to the technical solution of this utility model, by adopting an improved busbar trunking connector and circuit connection method, the faulty busbar trunking body 11 and copper clip plug-in faults can be quickly bypassed. Wiring can be done directly on the busbar trunking connector without opening the busbar trunking cover. Construction is convenient and simple, and power supply can be restored quickly, improving the speed of power emergency repair. The power restoration time has been shortened from more than 4 hours to less than 1.5 hours. Moreover, the power load is not reduced after power is restored, ensuring the long-term stable operation of power supply.

[0081] Since stamping machines and laser cutting machines are already widely known and used, their specific structures and working principles will not be elaborated here.

Claims

1. A busbar connector for rapid power restoration, comprising a connector end plate, an insulating partition, a metal connecting piece, locking bolts, and bolt insulating sleeves, wherein the metal connecting piece is placed between the insulating partitions, two connector end plates clamp the stacked insulating partitions, and are connected together by 1-2 locking bolts fitted with bolt insulating sleeves, characterized in that, The width of the metal connecting piece is 12mm to 150mm greater than the width of the insulating partition. The portion exceeding the width of the insulating partition has at least one wiring hole with a diameter of 8.4mm to 21mm.

2. The busbar connector for rapid power restoration according to claim 1, characterized in that, The wiring holes of the metal connecting piece are round or square.

3. The busbar connector for rapid power restoration according to claim 1, characterized in that, The metal connecting piece is bent, with the upper and lower parts parallel after bending.

4. A busbar connector for rapid power restoration according to claim 1 or 3, characterized in that, The metal connecting piece is provided with a hanging ear on the part that extends beyond the width of the insulating partition, and the hanging ear has a wiring hole.

5. A busbar connector for rapid power restoration according to claim 1 or 3, characterized in that, The portion of the metal connecting piece that extends beyond the width of the insulating partition is provided with a cylinder, which is horizontally connected to the metal connecting piece.

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