Copper bar connecting structure of dual-power automatic change-over switch

Abstract

The utility model discloses a copper bar connecting structure of a dual-power automatic change-over switch, which comprises a base, an end cover arranged on the base, a bottom plate and a protection plate, the bottom plate and the protection plate are arranged at the bottom of the base, and a plurality of static terminals are arranged on the left side and the right side of the base. The base is provided with a plurality of receding grooves, the bottom plate is provided with a plurality of copper bars and fixedly connected with the static terminals on the left side and the right side, the bottom plate is provided with a plurality of arc isolating devices and arranged between the copper bars, the copper bars are provided with conducting strips and inserted in the receding grooves, and the end cover is provided with a plurality of wiring terminals and electrically connected with the conducting strips. The protection plate is fixedly installed on the bottom plate and abuts against the base and the end cover. According to the utility model, the creepage distance and the electrical gap between the copper bars are increased through the abdicating grooves, the first arc isolating sheets and the arc isolating devices, so that the insulation distance and the voltage-withstanding value are improved, and the product has the advantages of high safety and improved use stability.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical switches, in particular to a copper busbar connection structure of a dual power automatic transfer switch. Background Art

[0002] The purpose of the dual power automatic transfer switch is, in simple terms, to have one main power source and one backup power source. When the main power source suddenly fails or there is a power outage, the dual power switch will automatically switch to the backup power source so that the equipment can still operate normally.

[0003] When wiring the dual power automatic transfer switch, you first need to manually remove part of the insulation of the wires, insert the wires into the corresponding wiring holes, and then tighten the fixing screws of each wiring hole to complete the installation. The entire wiring process is relatively cumbersome.

[0004] According to the "Wiring structure of dual power automatic transfer switch and molded dual power automatic transfer switch" with authorization announcement number CN209729763U, the wiring structure of the dual power automatic transfer switch includes: a wiring seat, having a plurality of installation cavities arranged at intervals, a hexagonal installation groove at the bottom of the installation cavity, and a nut adapted thereto; a plurality of installation plates, arranged at the top of the corresponding installation cavity, the installation plates are formed with threaded holes for connection with bolts; the first wiring copper bar and the second wiring copper bar, each of which has a first through hole arranged opposite to the threaded hole at one end inserted into the installation cavity; the bolt passes through the threaded hole and the first through hole in turn, and is screwed with the nut to press the first wiring copper bar and the second wiring copper bar together. In this way, during the process of tightening the bolt, the lateral position of the first wiring copper bar and the second wiring copper bar remains unchanged, thereby ensuring that the contact area between the two remains unchanged, the conductive effect is good, and the installer does not need to operate with both hands at the same time, making the operation simpler.

[0005] However, the electrical gap between the first wiring copper busbar and the second wiring copper busbar in the above design is too small, resulting in excessive current density, forming an electrical short circuit. The current will be affected by resistance when flowing in the copper busbar. The electrical short circuit will cause the current to flow in a concentrated manner in a local area, thereby forming a high-density current. The high-density current can easily cause equipment overheating and damage to the equipment. In severe cases, it may cause safety accidents such as fire. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the invention

[0006] The purpose of the utility model is to overcome the shortcomings of the above technical solutions and provide a product with high safety and improved stability in use.

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A copper busbar connection structure of a dual power automatic transfer switch comprises a base, an end cover mounted on the base, a bottom plate and a protective plate mounted at the bottom of the base, a plurality of static terminals being provided on the left and right sides of the base, a plurality of recesses being provided on the base, a plurality of copper busbars being provided on the bottom plate and being connected and fixed to the static terminals on the left and right sides, a plurality of arc-isolating devices being provided on the bottom plate and being arranged between the copper busbars, a conductive sheet being provided on the copper busbar and being inserted in the recesses, a plurality of wiring terminals being provided on the end cover and being electrically connected to the conductive sheet, a protective plate being fixedly mounted on the bottom plate and abutting against the base and the end cover, and a plurality of first arc-isolating sheets being provided on the protective plate and being inserted between the conductive sheets.

[0009] Preferably, the static terminal is provided with a cylinder, passes through the base, and abuts against the copper busbar, and the cylinder is connected and fixed to the copper busbar by screws.

[0010] Preferably, the protection plate is provided with wiring holes corresponding to the wiring terminals, and the width of the first arc isolation sheet is greater than the width of the conductive sheet.

[0011] Preferably, a first groove, a second groove, a third groove and a fourth groove are provided on the left and right sides of the bottom plate, and the two first grooves are connected.

[0012] Preferably, the copper bar includes a first copper bar, a second copper bar, a third copper bar and a fourth copper bar, the first copper bar is arranged in the first groove, the second copper bar is arranged in the second groove, the third copper bar is arranged in the third groove, and the fourth copper bar is arranged in the fourth groove.

[0013] Preferably, the arc isolation device includes a second arc isolation plate, a first insulating plate, a second insulating plate, and a third insulating plate. The first insulating plate abuts the first copper bar, the second insulating plate abuts the first copper bar and the second copper bar, and the third insulating plate abuts the first copper bar, the second copper bar, and the third copper bar. The second arc isolation plate is arranged between the first groove and the second groove, the second groove and the third groove, and the third groove and the fourth groove, and abuts the bottom of the base. Baffles are provided on both sides of the first insulating plate, the second insulating plate, and the third insulating plate.

[0014] Preferably, the second copper bar, the third copper bar and the fourth copper bar are provided with arched portions, and abut against the first insulating plate, the second insulating plate and the third insulating plate respectively.

[0015] Preferably, the conductive sheet is L-shaped and is connected and fixed to the wiring terminal by screws.

[0016] Beneficial effects:

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model increases the creepage distance and electrical clearance between copper bars by means of the yield groove, the first arc isolation plate and the arc isolation device, thereby increasing the insulation distance and improving the withstand voltage value, and preventing the adjacent copper bars from having too small an electrical clearance, resulting in an excessive current density and forming an electrical short circuit. When the current flows in the copper bar, it will be affected by resistance. The electrical short circuit will cause the current to flow in a concentrated manner in a local area, thereby forming a high-density current. The high-density current can easily cause equipment overheating and damage to the equipment. In severe cases, it can cause safety accidents such as fire. The utility model overcomes the defects of the technical solution proposed in the background technology, and makes the product have the advantages of high safety and improved stability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the side cross-section structure of a copper busbar connection structure of a dual power automatic transfer switch of the utility model;

[0020] Figure 2 This is a structural explosion diagram of a copper busbar connection structure of a dual power automatic transfer switch of the utility model;

[0021] Figure 3 This is an exploded diagram of the bottom plate structure of a copper busbar connection structure of a dual power automatic transfer switch of the utility model;

[0022] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0023] Figure numerals: 1. base; 2. end cover; 3. bottom plate; 4. protection plate; 5. copper busbar; 6. arc isolation device; 11. static terminal; 12. give way groove; 13. cylinder; 21. terminal; 31. first groove; 32. second groove; 33. third groove; 34. fourth groove; 41. first arc isolation plate; 42. wiring hole; 51. conductive plate; 52. first copper busbar; 53. second copper busbar; 54. third copper busbar; 55. fourth copper busbar; 56. arched portion; 61. second arc isolation plate; 62. first insulating plate; 63. second insulating plate; 64. third insulating plate; 65. baffle. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] Reference example Figures 1 to 3 A copper busbar connection structure of a dual power automatic transfer switch comprises a base 1, an end cover 2 mounted on the base 1, a bottom plate 3 mounted at the bottom of the base 1, and a protective plate 4. The base 1 is provided with a plurality of static terminals 11 on the left and right sides, the base 1 is provided with a plurality of recesses 12, the bottom plate 3 is provided with a plurality of copper busbars 5, and is connected and fixed with the static terminals 11 on the left and right sides, the bottom plate 3 is provided with a plurality of arc isolation devices 6, and is arranged between the copper busbars 5, the copper busbar 5 is provided with a conductive sheet 51, and is inserted in the recesses 12, the end cover 2 is provided with a plurality of wiring terminals 21, and is electrically connected with the conductive sheet 51, the protective plate 4 is fixedly mounted on the bottom plate 3, and is against Connect the base 1 and the end cover 2, the protection plate 4 is provided with a plurality of first arc-isolating sheets 41, and is inserted between the conductive sheets 51. The creepage distance and the electrical clearance between the copper bars 5 are increased by the recess 12, the first arc-isolating sheets 41, and the arc-isolating device 6, thereby increasing the insulation distance and improving the withstand voltage value, and preventing the adjacent copper bars 5 from having too large a current density due to too small an electrical clearance, thereby forming an electrical short circuit. When the current flows in the copper bar 5, it will be affected by resistance. The electrical short circuit will cause the current to flow in a concentrated manner in a local area, thereby forming a high-density current. The high-density current is likely to cause the equipment to overheat and damage the equipment, and in severe cases, may cause safety accidents such as fire.

[0027] It is worth mentioning that the static terminal 11 is provided with a cylinder 13, which passes through the base 1 and abuts against the copper bar 5. The cylinder 13 is connected and fixed to the copper bar 5 by screws. The cylinder 13 and the copper bar 5 are tightly electrically connected by screws, and it is convenient for later maintenance to replace the copper bar 5 or the static terminal 11.

[0028] It is worth mentioning that the protection plate 4 is provided with a wiring hole 42 corresponding to the wiring terminal 21, the width of the first arc isolation sheet 41 is greater than the width of the conductive sheet 51, the wiring hole 42 facilitates the wire to enter the wiring terminal 21, and the width of the first arc isolation sheet 41 is greater than the width of the conductive sheet 51, which serves to increase the creepage distance and air gap between adjacent conductive sheets 51;

[0029] It is worth mentioning that the left and right sides of the bottom plate 3 are provided with a first groove 31, a second groove 32, a third groove 33, and a fourth groove 34, the two first grooves 31 are connected, the first groove 31, the second groove 32, the third groove 33, and the fourth groove 34 provide a holding space for the copper bar 5, and the first groove 31 prevents the first copper bar 52 from flying wires;

[0030] It is worth mentioning that the copper bar 5 includes a first copper bar 52, a second copper bar 53, a third copper bar 54, and a fourth copper bar 55. The first copper bar 52 is arranged in the first groove 31, the second copper bar 53 is arranged in the second groove 32, the third copper bar 54 is arranged in the third groove 33, and the fourth copper bar 55 is arranged in the fourth groove 34. The first copper bar 52, the second copper bar 53, the third copper bar 54, and the fourth copper bar 55 are used in conjunction with the first groove 31, the second groove 32, the third groove 33, and the fourth groove 34 respectively.

[0031] It is worth mentioning that the arc isolation device 6 includes a second arc isolation piece 61, a first insulating plate 62, a second insulating plate 63, and a third insulating plate 64. The first insulating plate 62 abuts against the first copper bar 52, the second insulating plate 63 abuts against the first copper bar 52 and the second copper bar 53, and the third insulating plate 64 abuts against the first copper bar 52, the second copper bar 53, and the third copper bar 54. The second arc isolation piece 61 is arranged between the first groove 31 and the second groove 32, the second groove 32 and the third groove 33, and the third groove 33 and the fourth groove 34, and abuts against the bottom of the base 1. Baffles 65 are provided on both sides of the first insulating plate 62, the second insulating plate 63, and the third insulating plate 64. The second arc isolation piece 61 increases the spacing between adjacent copper bars 5. The creepage distance and air gap of the first insulating plate 62 allow the second copper bar 53 to pass over the first copper bar 52 to prevent the second copper bar 53 from contacting the first copper bar 52, causing a short circuit problem. The second insulating plate 63 allows the third copper bar 54 to pass over the first copper bar 52 and the second copper bar 53 to prevent the third copper bar 54 from contacting the first copper bar 52 and the second copper bar 53, causing a short circuit problem. The third insulating plate 64 allows the fourth copper bar 55 to pass over the first copper bar 52, the second copper bar 53, and the third copper bar 54 to prevent the fourth copper bar 55 from contacting the first copper bar 52, the second copper bar 53, and the third copper bar 54, causing a short circuit problem. The baffle 65 increases the creepage distance between the copper bars 5;

[0032] It is worth mentioning that the second copper bar 53, the third copper bar 54, and the fourth copper bar 55 are provided with an arched portion 56, and respectively abut against the first insulating plate 62, the second insulating plate 63, and the third insulating plate 64. The arched portion 56 is convenient for raising the height of the second copper bar 53, the third copper bar 54, and the fourth copper bar 55, and is used in conjunction with the first insulating plate 62, the second insulating plate 63, and the third insulating plate 64;

[0033] It is worth mentioning that the shape of the conductive sheet 51 is set to be L-shaped and is connected and fixed to the terminal 21 by screws. The conductive sheet 51 is tightly electrically connected to the terminal 21 by screws, and it is convenient for later maintenance and replacement of the terminal 21 or the conductive sheet 51.

[0034] The above design scheme can make the product have the advantages of high safety and improved stability in use.

[0035] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A copper busbar connection structure of a dual power automatic transfer switch, comprising a base (1), an end cover (2) mounted on the base (1), a bottom plate (3) mounted at the bottom of the base (1), and a protective plate (4), characterized in that: The base (1) is provided with a plurality of static terminals (11) on the left and right sides, the base (1) is provided with a plurality of clearance grooves (12), the bottom plate (3) is provided with a plurality of copper bars (5) and is connected and fixed to the static terminals (11) on the left and right sides, the bottom plate (3) is provided with a plurality of arc isolation devices (6) and is arranged between the copper bars (5), the copper bars (5) are provided with conductive sheets (51) and are inserted into the clearance grooves (12), the end cover (2) is provided with a plurality of wiring terminals (21) and is electrically connected to the conductive sheets (51), the protection plate (4) is installed and fixed on the bottom plate (3) and abuts against the base (1) and the end cover (2), the protection plate (4) is provided with a plurality of first arc isolation sheets (41) and is inserted between the conductive sheets (51).

2. The copper busbar connection structure of the dual power automatic transfer switch according to claim 1 is characterized in that: The static terminal (11) is provided with a cylinder (13) which passes through the base (1) and abuts against the copper busbar (5); the cylinder (13) is connected and fixed to the copper busbar (5) by means of screws.

3. The copper busbar connection structure of the dual power automatic transfer switch according to claim 1 is characterized in that: The protection plate (4) is provided with a wiring hole (42) corresponding to the wiring terminal (21), and the width of the first arc isolation sheet (41) is greater than the width of the conductive sheet (51).

4. The copper busbar connection structure of the dual power automatic transfer switch according to claim 1 is characterized in that: A first groove (31), a second groove (32), a third groove (33) and a fourth groove (34) are provided on the left and right sides of the bottom plate (3), and the two first grooves (31) are connected.

5. The copper busbar connection structure of the dual power automatic transfer switch according to claim 4 is characterized in that: The copper bar (5) comprises a first copper bar (52), a second copper bar (53), a third copper bar (54), and a fourth copper bar (55); the first copper bar (52) is arranged in a first groove (31), the second copper bar (53) is arranged in a second groove (32), the third copper bar (54) is arranged in a third groove (33), and the fourth copper bar (55) is arranged in a fourth groove (34).

6. The copper busbar connection structure of the dual power automatic transfer switch according to claim 5 is characterized in that: The arc isolation device (6) comprises a second arc isolation plate (61), a first insulating plate (62), a second insulating plate (63), and a third insulating plate (64); the first insulating plate (62) abuts against the first copper bar (52); the second insulating plate (63) abuts against the first copper bar (52) and the second copper bar (53); the third insulating plate (64) abuts against the first copper bar (52), the second copper bar (53), and the third copper bar (54); the second arc isolation plate (61) is arranged between the first groove (31) and the second groove (32), the second groove (32) and the third groove (33), and the third groove (33) and the fourth groove (34), and abuts against the bottom of the base (1); baffles (65) are provided on both sides of the first insulating plate (62), the second insulating plate (63), and the third insulating plate (64).

7. The copper busbar connection structure of the dual power automatic transfer switch according to claim 6 is characterized in that: The second copper bar (53), the third copper bar (54), and the fourth copper bar (55) are provided with an arched portion (56) and respectively abut against the first insulating plate (62), the second insulating plate (63), and the third insulating plate (64).

8. The copper busbar connection structure of the dual power automatic transfer switch according to claim 1 is characterized in that: The conductive sheet (51) is configured to be L-shaped and is connected and fixed to the wiring terminal (21) by means of screws.

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