Connecting tool for major loop of large-current setting device

Abstract

The utility model discloses a connecting tool for a major loop of a large current setting device, the front sections of a first outer copper bar and a first inner copper bar of the tool are arranged at intervals, the tail sections of the first outer copper bar and the first inner copper bar are provided with first bending parts, the front sections of the first outer copper bar and the first inner copper bar are provided with long grooves, and the first bending parts are provided with through holes; the front sections of the second outer side copper bar and the second inner side copper bar are arranged at intervals, the tail sections of the second outer side copper bar and the second inner side copper bar are provided with second bending parts, the front sections of the second outer side copper bar and the second inner side copper bar are provided with through holes, the second bending parts are provided with long grooves at intervals, and the first bending parts and the second bending parts are arranged in a stacked mode and fixedly connected through bolts. The front sections of the first outer side copper bar and the first inner side copper bar clamp the setting device busbar and are fixedly connected through bolts, and the front sections of the second outer side copper bar and the second inner side copper bar clamp the detected switchgear busbar and are fixedly connected through bolts. The tool ensures the output current of the setting device, reduces the voltage drop of the main loop, avoids the heating of the main loop, and improves the efficiency of the connection operation of the main loop.

Description

Technical Field

[0001] The utility model relates to the technical field of high-current electrical component connection, in particular to a connection tool for a main circuit of a high-current setting device. Background Art

[0002] The high-current setting device is a core piece of equipment in the switchgear operating area. Designed to output 20,000A AC and DC, it is primarily used to set the current setpoints of low-voltage electrical equipment and the current values ​​of DC quick-acting switches. It can also be used for temperature rise verification testing of equipment load capacity. High-current setting tests primarily target low-voltage circuit breakers undergoing repair in the field and for offline diagnosis of circuit breakers suspected of overcurrent protection failures. Therefore, the quality of the setting device directly impacts the quality and efficiency of repairs. In practice, the current output capacity of the high-current setting device is often limited by the connection between the device and the main circuit of the equipment being tested. Currently, the traditional connection method often uses multi-strand braided annealed copper wire. However, due to its low current carrying capacity and the tendency of its ends to dent under pressure, this connection increases the voltage drop in the main circuit and significantly reduces the device's output current, seriously impacting test process requirements. Furthermore, when connected with multi-strand braided annealed copper wire, the main circuit is prone to overheating, posing a safety hazard. Bolts are typically used to connect the multi-strand braided annealed copper wire to the high-current setting device and circuit breaker, which is labor-intensive and inefficient. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a connecting tool for the main circuit of a large current setting device. The connecting tool overcomes the defects of traditional multi-strand braided soft copper wire, ensures the output current of the setting device, reduces the voltage drop of the main circuit, avoids heating of the main circuit, and improves the efficiency of the main circuit connection operation.

[0004] In order to solve the above technical problems, the utility model is a connection tool for the main circuit of a large current setting device, comprising a first outer copper bar, a first inner copper bar, a second outer copper bar and a second inner copper bar, wherein the first outer copper bar is spaced apart from the front section of the first inner copper bar and is provided with a first bending portion arranged in a stacked manner at the tail section, the first outer copper bar and the front section of the first inner copper bar are spaced apart from each other and are provided with a long groove matching the position, the first bending portion is spaced apart from each other and is provided with a through hole, the second outer copper bar is spaced apart from the front section of the second inner copper bar and is provided with a second bending portion arranged in a stacked manner at the tail section, the second outer copper bar and the front section of the second inner copper bar are spaced apart from each other and are provided with a second bending portion arranged in a stacked manner, the second outer copper bar and the front section of the second inner copper bar are spaced apart from each other and are provided with a There are through holes with matching positions, and long slots are provided at intervals of the second bending portion. The first bending portion and the second bending portion are stacked and fixedly connected by bolts passing through the through holes of the first bending portion and the long slots of the second bending portion. The front sections of the first outer copper bar and the first inner copper bar clamp the busbar of the setting device and are fixedly connected by bolts passing through the long slots of the front sections of the first outer copper bar and the first inner copper bar and the through holes of the busbar of the setting device. The front sections of the second outer copper bar and the second inner copper bar clamp the busbar of the switch device under inspection and are fixedly connected to the through holes of the busbar of the switch device under inspection by bolts passing through the through holes of the front sections of the second outer copper bar and the second inner copper bar.

[0005] Furthermore, the tail section of the first outer copper bar and the tail section of the second outer copper bar in the first bending portion and the second bending portion form a whole, so that the first outer copper bar and the second outer copper bar form a C-shaped structure, and the tail section of the first inner copper bar and the tail section of the second inner copper bar in the first bending portion and the second bending portion form a whole, so that the first inner copper bar and the second inner copper bar form a C-shaped structure.

[0006] Furthermore, the connecting bolts between the first bending portion and the second bending portion, the connecting bolts between the first outer copper bar and the front section of the first inner copper bar and the busbar of the setting device, and the connecting bolts between the second outer copper bar and the front section of the second inner copper bar and the busbar of the switch device under inspection are respectively high-strength stainless steel bolts.

[0007] Furthermore, the bending angles of the first bending portion and the second bending portion are 90°.

[0008] Since the connection fixture for the main circuit of a large current setting device of the present invention adopts the above-mentioned technical solution, namely, the first outer copper bar of the fixture is spaced apart from the front section of the first inner copper bar and a first bent portion arranged in a stacked manner is provided at the rear section, the first outer copper bar and the front section of the first inner copper bar are spaced apart from each other and a long slot with a through hole is provided at the first bent portion, the second outer copper bar is spaced apart from the front section of the second inner copper bar and a second bent portion is spaced apart from each other and a second bent portion is spaced apart at the rear section, the second outer copper bar and the front section of the second inner copper bar are spaced apart from each other and a through hole with a long slot is provided at the second bent portion, the first bent portion is stacked and fixedly connected by bolts, the front sections of the first outer copper bar and the first inner copper bar clamp the busbar of the setting device and are fixedly connected by bolts, the front sections of the second outer copper bar and the second inner copper bar clamp the busbar of the switchgear under test and are fixedly connected by bolts. This connection fixture overcomes the defects of traditional multi-strand braided soft copper wire, ensures the output current of the setting device, reduces the voltage drop of the main circuit, avoids heating of the main circuit, and improves the efficiency of the main circuit connection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0010] Figure 1 This is a schematic diagram of the connection tooling for the main circuit of the large current setting device of the utility model;

[0011] Figure 2 Schematic diagram of the structure of the first outer copper bar and the first inner copper bar in this connection tool;

[0012] Figure 3 for Figure 2 A top view of

[0013] Figure 4 for Figure 2 Side view of;

[0014] Figure 5 This is a schematic diagram of the structure of the second outer copper bar and the second inner copper bar in this connection tool;

[0015] Figure 6 for Figure 5 A top view of

[0016] Figure 7 for Figure 5 Side view of;

[0017] Figure 8 This is a schematic diagram of the overall structure formed by the first bending portion and the second bending portion in this connecting tool. DETAILED DESCRIPTION

[0018] Implementation example Figures 1 to 7As shown, the connection tooling for the main circuit of the large current setting device of the present invention includes a first outer copper bar 1, a first inner copper bar 2, a second outer copper bar 3 and a second inner copper bar 4. The first outer copper bar 1 and the first inner copper bar 2 are spaced apart in the front section and are provided with a first bending portion 5 arranged in a stacked manner in the tail section. The first outer copper bar 1 and the first inner copper bar 2 are spaced apart in the front section and are provided with a long groove 6 with a matching position, and the first bending portion 5 is spaced apart and provided with a through hole 51. The second outer copper bar 3 and the second inner copper bar 4 are spaced apart in the front section and are provided with a second bending portion 7 with a stacked arrangement in the tail section. The second outer copper bar 3 and the second inner copper bar 4 are spaced apart in the front section and are provided with a through hole 8 with a matching position, and a second bending portion 9 is spaced apart. The bend 7 is provided with long grooves 71 at intervals. The first bend 5 and the second bend 7 are arranged in a stacked manner and are fixedly connected by passing a bolt 93 through the through hole 51 of the first bend 5 and the long groove 71 of the second bend 7. The front sections of the first outer copper bar 1 and the first inner copper bar 2 clamp the setting device busbar 91 and are fixedly connected by passing a bolt 94 through the long groove 6 of the front sections of the first outer copper bar 1 and the first inner copper bar 2 and the through hole of the setting device busbar 91. The front sections of the second outer copper bar 3 and the second inner copper bar 4 clamp the busbar 92 of the switch device under inspection and are fixedly connected by passing a bolt 95 through the through hole 8 of the front sections of the second outer copper bar 3 and the second inner copper bar 4 and the through hole of the busbar 92 of the switch device under inspection.

[0019] Preferably, Figure 8 As shown, the tail section of the first outer copper bar 1 and the tail section of the second outer copper bar 3 in the first bend 5 and the second bend 7 are integrated, forming a C-shaped structure for the first outer copper bar 1 and the second outer copper bar 3. The tail section of the first inner copper bar 2 and the tail section of the second inner copper bar 4 in the first bend 5 and the second bend 7 are integrated, forming a C-shaped structure for the first inner copper bar 2 and the second inner copper bar 4. The C-shaped structure simplifies the structure of the connection fixture and improves the efficiency of connecting the fixture to the busbar of the setting device and the busbar of the switchgear under inspection under working conditions where longitudinal spacing adjustment is not required.

[0020] Preferably, the connecting bolts 93 between the first bend 5 and the second bend 7, the connecting bolts 94 between the front ends of the first outer copper bar 1 and the first inner copper bar 2 and the setting device busbar 91, and the connecting bolts 95 between the front ends of the second outer copper bar 3 and the second inner copper bar 4 and the switchgear busbar 92 under inspection are all high-strength stainless steel bolts. The high-strength stainless steel bolts not only ensure connection reliability but also reduce eddy current losses in high-current magnetic fields, ensuring that the setting device can output the rated high current.

[0021] Preferably, the bending angle of the first bending portion 5 and the second bending portion 7 is 90°.

[0022] This connection fixture uses a first outer copper bar 1, a first inner copper bar 2, a second outer copper bar 3, and a second inner copper bar 4, instead of multi-strand braided soft copper wire, to connect the setting device busbar 91 and the switchgear busbar 92 under test. Each copper bar is 120 mm (width) x 10 mm (thickness). The setting device busbar 91 is clamped between the first outer copper bar 1 and the first inner copper bar 2. The clamping position is adjustable via slots 6 provided in the front sections of the first outer copper bar 1 and the first inner copper bar 2, enabling lateral adjustment of the setting device busbar 91. The first bend 5 and the second bend 7 can be offset by slots 71 provided in the second bend 7, allowing longitudinal adjustment of the spacing between the first outer copper bar 1 and the first inner copper bar 2 and the second outer copper bar 3 and the second inner copper bar 4. This lateral and longitudinal spacing adjustment allows for adaptability to different models and specifications of switchgear under test, enabling connection to the main circuit of the switchgear under test and eliminating the drawbacks of multi-strand braided soft copper wire.

[0023] By connecting the setting device busbar 91 and the busbar 92 of the switchgear under inspection through this connecting fixture, the output current of the setting device is greatly improved, and the maximum output current can reach 18050A, which is close to the design capacity; the flexibility and efficiency of the main circuit connection of the setting device are improved, and the maintenance workload is greatly reduced. The setting time of each circuit breaker is shortened from 8 hours to 3 hours, which can better meet the maintenance needs of on-site temporary power outage detection, realize efficient and convenient construction detection, and contribute to the standardized management of the maintenance work environment.

Claims

1. A connection tool for the main circuit of a large current setting device, characterized by: The invention comprises a first outer copper bar, a first inner copper bar, a second outer copper bar and a second inner copper bar, wherein the first outer copper bar is spaced apart from the front section of the first inner copper bar and is provided with a first bending portion arranged in a stacked manner at the rear section, the first outer copper bar and the front section of the first inner copper bar are spaced apart from each other and are provided with a long groove having a matching position, and the first bending portion is spaced apart from each other and is provided with a through hole, the second outer copper bar is spaced apart from the front section of the second inner copper bar and is provided with a second bending portion having a stacked manner at the rear section, the second outer copper bar and the second inner copper bar are spaced apart from each other and are provided with a through hole having a matching position, and the second bending portion is spaced apart from each other and is provided with a second bending portion having a matching position, and the second outer copper bar and the second inner copper bar are spaced apart from each other and are provided with a second bending portion having a matching position, and the second bending portion is spaced apart from each other and is ... first bending portion. A long slot is provided, the first bending portion and the second bending portion are stacked and fixedly connected by bolts passing through the through hole of the first bending portion and the long slot of the second bending portion, the first outer copper bar and the first inner copper bar front section clamp the busbar of the setting device and are fixedly connected by bolts passing through the long slot of the first outer copper bar and the first inner copper bar front section and the through hole of the busbar of the setting device, the second outer copper bar and the second inner copper bar front section clamp the busbar of the switch device under inspection and are fixedly connected by bolts passing through the through holes of the second outer copper bar and the second inner copper bar front section and the through hole of the busbar of the switch device under inspection.

2. The connection fixture for the main circuit of a large current setting device according to claim 1, characterized in that: The tail section of the first outer copper bar and the tail section of the second outer copper bar in the first bending portion and the second bending portion are integrated, so that the first outer copper bar and the second outer copper bar form a C-shaped structure, and the tail section of the first inner copper bar and the tail section of the second inner copper bar in the first bending portion and the second bending portion are integrated, so that the first inner copper bar and the second inner copper bar form a C-shaped structure.

3. The connection tool for the main circuit of a large current setting device according to claim 1 or 2, characterized in that: The connecting bolts between the first bending part and the second bending part, the connecting bolts between the first outer copper bar and the front section of the first inner copper bar and the busbar of the setting device, and the connecting bolts between the second outer copper bar and the front section of the second inner copper bar and the busbar of the switchgear under inspection are all high-strength stainless steel bolts.

4. The connection fixture for the main circuit of a large current setting device according to claim 3, characterized in that: The bending angles of the first bending portion and the second bending portion are 90°.

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