CN218919327U - High-current wiring terminal and low-voltage air circuit breaker applying same - Google Patents
High-current wiring terminal and low-voltage air circuit breaker applying same Download PDFInfo
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- CN218919327U CN218919327U CN202223179545.2U CN202223179545U CN218919327U CN 218919327 U CN218919327 U CN 218919327U CN 202223179545 U CN202223179545 U CN 202223179545U CN 218919327 U CN218919327 U CN 218919327U
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Abstract
The utility model discloses a high-current wiring terminal and a low-voltage air circuit breaker applying the same, and belongs to the technical field of low-voltage air circuit breakers. The device comprises a T-shaped terminal and two L-shaped terminals arranged on two sides of the T-shaped terminal; the T-shaped terminal and the L-shaped terminal form three bosses in the same direction, and two grooves for connecting buses are formed between the three bosses; the monolithic thickness of the T-shaped terminal and the L-shaped terminal is at least 8mm. According to the high-current wiring terminal, the high-current wiring terminal is arranged into a multi-piece structure, and the high-current wiring terminal is provided with more radiating surfaces, so that the temperature rise value can be reduced, the multi-piece bus connected with the high-current wiring terminal can be closely pressed after being misplaced, the formed resistance value is low, meanwhile, a radiating air passage is formed in the high-current wiring terminal, and the cooling effect is obvious; the thickness of the single piece of the wiring terminal is at least 8mm, and the structural strength of the wiring terminal can bear the impact of corresponding electrodynamic force.
Description
Technical Field
The utility model relates to a high-current wiring terminal and a low-voltage air circuit breaker applying the same, and belongs to the technical field of low-voltage air circuit breakers.
Background
Low-voltage air circuit breakers refer to electrical equipment used in ac 1000V (or dc 1500V) and below voltage levels. In the design and manufacturing process, the cost performance of equipment is considered, the competitiveness of the product is improved, and meanwhile, the technical parameters of the product, such as the rated short-time withstand current and the limit breaking capacity of the circuit breaker are improved, and the installation mode with lower temperature rise and convenience and reliability is also needed to be considered.
The low-voltage air circuit breaker is widely applied to traditional industries such as power plants, power substations, petrochemical industry, metallurgical steel rolling, public transportation, papermaking printing and the like, is also used in emerging industries such as data centers, ships and offshore platforms, environmental protection treatment, electronics, silicon crystal manufacturing and the like, and can also be used in new energy power equipment such as wind power generation, photovoltaics, energy storage and the like. The circuit breaker has wide application range and the like products compete strongly, so that the cost of the products is reduced on the premise of ensuring the performance of the products, and the circuit breaker belongs to key components in power distribution equipment.
On the one hand, the low-voltage air circuit breaker has the important parameters of rated current value, low energy consumption assessment of temperature rise, short-circuit protection and short-circuit tolerance strength, and the circuit breaker must pass each type test verification of a national test station, and can resist thermal stress and electric stress generated by short-circuit current and temperature rise requirements assessed by different current levels.
On the other hand, the low-voltage air circuit breaker comprises a fixed structure and a draw-out structure, and the draw-out circuit breaker comprises a fixed frame (base) and a circuit breaker body (movable). When the lower circuit is required to be maintained, the breaker body can be conveniently and rapidly drawn out from the base, so that the complete isolation of the power supply is ensured.
However, in the existing low-voltage air circuit breaker, the temperature rise of a primary terminal is common, and the heat dissipation of the circuit breaker can be realized by increasing the using amount of a bus, so that the assessment requirement of the temperature rise of 70K is met.
Therefore, the high-current wiring terminal can eliminate stress generated by installing the bus and the fixing bolt, and the lap joint bus has a lower resistance value through a large enough contact surface between the bus and the terminal by a multi-piece crimping technology, so that the heat dissipation effect between the wiring terminal and the bus and the circuit breaker is improved.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the utility model provides a high-current binding post and low-voltage air circuit breaker of application thereof, it has solved the general phenomenon that the primary terminal temperature of current high-current circuit breaker risees, needs to rely on the passive technique that increases the mode of generating line quantity in order to be convenient for the circuit breaker heat dissipation.
The technical problems to be solved by the utility model are realized by adopting the following technical scheme:
a high-current wiring terminal is a special-shaped body formed by drawing copper (copper and silver are more than or equal to 99.5%), and comprises a T-shaped terminal and two L-shaped terminals arranged on two sides of the T-shaped terminal, and silver plating treatment is carried out on the surface of the copper;
the T-shaped terminal and the L-shaped terminal form three bosses in the same direction, two grooves for connecting buses are formed between the three bosses, the wiring terminal is of a multi-piece structure, the wiring terminal is closely pressed and connected with the connected multi-piece buses after being staggered, and the formed resistance value is low. Meanwhile, a heat dissipation air passage is formed in the cooling device, so that the cooling effect is obvious.
The T-shaped terminal and the L-shaped terminal have a monolithic thickness of at least 8mm, and have sufficient strength to withstand an electromotive force generated when a short circuit may occur in a circuit.
As a preferred example of this,
the T-shaped terminal comprises a first horizontal part and a first vertical part, and two corner grooves are formed between the first horizontal part and the first vertical part;
the L-shaped terminal comprises a second horizontal part and a second vertical part, and an angle part is formed between the second horizontal part and the second vertical part;
the two corners are respectively placed in the corner groove, and a groove is formed between the first vertical part and the second vertical part.
As a preferred example of this,
a plurality of first open holes are formed in the first vertical part of the T-shaped terminal, and a plurality of second open holes corresponding to the first open holes are formed in the second vertical part of each L-shaped terminal;
the T-shaped terminal comprises a T-shaped terminal body and is characterized in that a round hole is formed in a first horizontal portion of the T-shaped terminal body, a long waist hole corresponding to the connecting hole is formed in a second horizontal portion of each L-shaped terminal body, and the groove spacing between the L-shaped terminal body and the T-shaped terminal body is adjusted through the connecting position of the long waist hole and the round hole.
The two L-shaped terminal structures arranged in the wiring terminal can freely adjust the size of the cavity of the groove, the thickness range of the multi-piece bus connected with the groove is wide, the thickness range is arbitrarily adjusted from 4.5mm to 11.5mm, and the thickness and the associated size of the bus can be reasonably selected according to different rated current values of the circuit breaker, namely, the most economical section is optimized, and the waste of copper materials is avoided.
The utility model also provides a low-voltage air circuit breaker with the high-current wiring terminal, which comprises a circuit breaker body and a fixed frame, wherein the circuit breaker body is arranged on the fixed frame, the fixed frame is provided with a plurality of the wiring terminals, and the wiring terminals are connected with a bus through fasteners.
One end face (T-shaped terminal) of the wiring terminal is fixed on the base of the circuit breaker, and the other end (one end of the groove) of the wiring terminal is connected with a bus to form a power transmission and distribution system of a primary circuit;
the bus bar is required to be provided with cross section specifications meeting requirements, for example, the thickness of the bus bar is 5mm, 6mm, 8mm, 10mm and the like, the width of the bus bar is 40mm, 50mm, 60mm, 80mm, 100mm, 120mm and the like, and the number of the bus bar is 1, 2, 3, 4 and the like.
Through the structure of the single-group wiring terminal, three TMY buses can be connected, the specification of the TMY buses is 8.5X100mm, or four TMY buses are 6.35X100mm, and the rated current value of 4000A can be met through temperature rise test verification.
As a preferable example, the fastener is a bolt-nut assembly, and the bolt sequentially passes through the holes of the bus bar and the wiring terminal, so that the bus bar and the wiring terminal are naturally overlapped, and then the nut is screwed by a special tool to be fixed on the fixed frame.
The beneficial effects of the utility model are as follows:
(1) According to the high-current wiring terminal, the high-current wiring terminal is provided with a multi-piece structure, and the high-current wiring terminal is provided with more radiating surfaces, so that the temperature rise value can be reduced, the multi-piece bus connected with the high-current wiring terminal can be closely pressed after being misplaced, the formed resistance value is low, meanwhile, a radiating air passage is formed in a terminal groove, and the cooling effect is obvious; the thickness of a single piece of the wiring terminal is at least 8mm, and the structural strength of the wiring terminal can bear the impact of corresponding electrodynamic force;
(2) According to the utility model, two movable L-shaped terminals are combined with one T-shaped terminal, and the left L-shaped terminal and the right L-shaped terminal can adjust the interval size of the grooves through the long waist holes, so that the connection of buses with different thicknesses is facilitated;
(3) The wiring terminal can be vertically installed or horizontally installed according to the trend of the bus, and is suitable for various bus installation modes.
Drawings
Fig. 1 is a schematic perspective view of a high-current connection terminal according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an explosion structure of a high-current connection terminal according to an embodiment of the present utility model;
fig. 3 is a schematic view of a horizontal installation structure of a connection terminal of a low-voltage air circuit breaker according to an embodiment of the present utility model;
fig. 4 is a schematic view of a vertical installation structure of a connection terminal of a low-voltage air circuit breaker according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of a vertical installation structure of a low-voltage air circuit breaker with two sets of connection terminals connected in parallel in an embodiment of the utility model.
In the figure:
1. a T-shaped terminal; 101. a first horizontal portion; 102. a first vertical portion; 103. an angular groove; 104. a first opening; 105. a round hole;
2. an L-shaped terminal; 201. a second horizontal portion; 202. a second vertical portion; 203. a corner; 205. a second opening; 206. a long waist hole;
3. a circuit breaker body;
4. a fixed frame;
5. horizontally installing an upper bus;
6. a fastener;
7. horizontally installing a lower bus;
8. vertically installing an upper bus;
9. vertically installing a lower bus;
10. a transition busbar;
11. and (5) a vertical bus.
Detailed Description
The utility model will be further described with reference to the following detailed drawings and examples, in order to make the technical means, the creation features, the achievement of the objects and the effects of the utility model easily understood.
Examples:
as shown in figures 1-2, the utility model provides a high-current wiring terminal, which is a special-shaped body formed by drawing copper (copper and silver are more than or equal to 99.5%), and comprises a T-shaped terminal 1 and two L-shaped terminals 2 arranged on two sides of the T-shaped terminal 1, wherein silver plating treatment is carried out on the surface of the copper.
The T-shaped terminal 1 and the L-shaped terminal 2 form three bosses in the same direction, two grooves for connecting buses are formed between the three bosses, the wiring terminal is of a multi-piece structure, the wiring terminal and the connected multi-piece buses can be closely pressed after being staggered, and the formed resistance value is low. Meanwhile, the cooling effect is obvious due to the fact that the radiating air passage is arranged inside.
The T-shaped terminal 1 and the L-shaped terminal 2 have a monolithic thickness of at least 8mm, and have sufficient strength to withstand an electromotive force generated when a short circuit may occur in a circuit.
The T-shaped terminal 1 includes a first horizontal portion 101 and a first vertical portion 102, and two corner grooves 103 are formed therebetween.
Wherein the L-shaped terminal 2 includes a second horizontal portion 201 and a second vertical portion 202 forming an angle 203 therebetween.
The two corners 203 are respectively placed in the corner grooves 103, and grooves are formed between the first vertical portion 102 and the second vertical portion 202.
Preferably, four first openings 104 are provided on the first vertical portion 102 of the T-shaped terminal 1, and a number of second openings 205 corresponding to the first openings 104 are provided on the second vertical portion 202 of each L-shaped terminal 2.
Through the two L-shaped terminal 2 structures that set up in to binding post, can freely adjust the die cavity size of recess, the multi-disc busbar thickness scope of being connected with this is wide, from 4.5mm to 11.5mm arbitrary regulation, then can be according to the different rated current value of circuit breaker, rationally select the thickness and the relevant size of busbar, the cross-section that prefers promptly, avoids extravagant copper product.
The four round holes 105 of the wiring terminal are arranged in a square shape, so that the wiring terminal can be arranged horizontally or vertically, and the mounting mode can be flexibly adjusted according to the trend requirement of the bus, and the mounting mode is various and simple.
The wiring terminals can be arranged in a single group, can be used for the specifications of circuit breakers with rated currents of 4000A and below, can be connected in parallel in double groups, and are suitable for circuit breakers with larger current values of 5000A and 6300A, and the wiring terminals are modularized, high in universality and various in scheme.
As shown in fig. 3-5, the utility model further provides a low-voltage air circuit breaker with a high-current wiring terminal, which comprises a circuit breaker body 3 and a fixed frame 4, wherein the circuit breaker body 3 is arranged on the fixed frame 4, a plurality of wiring terminals are arranged on the fixed frame 4, and the wiring terminals are connected with a bus through a fastener 6.
One end face (T-shaped terminal 1) of the wiring terminal is fixed on a fixed frame 4 of the circuit breaker, and the other end (one end of the groove) of the wiring terminal is connected with a bus to form a power transmission and distribution system of the primary circuit.
The bus bar is required to be provided with the section specifications meeting the requirements, for example, the thickness of the bus bar is 5mm, 6mm, 8mm, 10mm and the like, the width of the bus bar is 40mm, 50mm, 60mm, 80mm, 100mm, 120mm and the like, and the number of the bus bar is 1, 2, 3, 4 and the like.
Through the structure of the single-group wiring terminal, three TMY buses can be connected, the specification of the TMY buses is 8.5X100mm, or four TMY buses are 6.35X100mm, and the rated current value of 4000A can be met through temperature rise test verification.
Preferably, the fastener 6 is a bolt-nut assembly, and comprises a bolt, a nut and a gasket, wherein the bolt sequentially penetrates through the holes of the bus and the wiring terminal, so that the bus and the wiring terminal are stably overlapped, and then the nut is screwed by a special tool to fix the wiring terminal on the fixed frame 4.
As shown in FIG. 3, the connecting terminal and the bus are horizontally connected, so that the connecting terminal and the bus can be conveniently connected with other conductors such as a horizontal bus, the length of the bus is short relative to that of the bus consumed, and the maximum rated current of the horizontal connection can reach 5000A. As shown in fig. 3, an upper and a lower sets of connection terminals are mounted on a fixed frame 4 of the circuit breaker, and are respectively an upper connection terminal and a lower connection terminal, wherein an upper horizontal mounting bus 5 is mounted on the upper connection terminal, and a lower horizontal mounting bus 7 is mounted on the lower connection terminal.
As shown in fig. 4-5, the connection terminal and the transition bus 10 adopt a vertical connection mode, so that low-temperature gas at the lower part of the cabinet body flows forward through the connection terminal and the transition bus 10, and forms a convection state with high-temperature gas at the upper part of the cabinet body, and the temperature of the circuit breaker and the bus inside the whole cabinet body can be reduced by the air flow. The rated current of 4000A can be met at maximum by adopting a single group of terminals, and the section of a matched bus is smaller and is only 2520mm 2 . As shown in fig. 4, an upper and a lower sets of connection terminals are mounted on the fixed frame 4 of the circuit breaker, and are respectively an upper connection terminal and a lower connection terminal, wherein an upper vertical bus bar 8 is mounted on the upper connection terminal, and a lower vertical bus bar 9 is mounted on the lower connection terminal.
As shown in FIG. 5, the rated current of 6300A can be satisfied by adopting a parallel structure of connecting two groups of terminals by a transition bus 10 and a vertical bus 11, and the cross section of the bus matched with the structure is smaller and is only 4800mm 2 。
The wiring terminal has the following beneficial effects:
(1) The wiring terminal is provided with a multi-piece structure, and can be closely pressed after being misplaced with the connected multi-piece bus, so that the formed resistance value is lower. Meanwhile, the terminal groove is internally provided with a heat dissipation air passage, so that the cooling effect is obvious.
(2) The two L-shaped terminals 2 arranged in the wiring terminal can freely adjust the size of the cavity of the groove, the thickness range of the multi-piece bus connected with the groove is wide, the thickness range is arbitrarily adjusted from 4.5mm to 11.5mm, and the thickness and the associated size of the bus can be reasonably selected according to different rated current values of the circuit breaker, namely, the most economical section is optimized, and the waste of copper materials is avoided.
(3) The four fixing bolt holes of the wiring terminal are arranged in square, so that the terminals can be horizontally or vertically arranged, the installation mode can be flexibly adjusted according to the trend requirement of the bus, and the installation mode is various and simple.
(4) The wiring terminals can be arranged in a single group, are used for the specifications of circuit breakers with rated currents of 4000A and below, can be connected in parallel in double groups, and are suitable for circuit breakers with larger current values of 5000A and 6300A, and are modularized, high in universality and various in scheme.
The foregoing description and shows the general principles, features and advantages of the utility model. It will be appreciated by persons skilled in the art that the present utility model is not limited to the embodiments described above, but is capable of numerous variations and modifications without departing from the essential spirit and scope of the utility model, which are intended to fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The high-current wiring terminal is characterized by comprising a T-shaped terminal (1) and two L-shaped terminals (2) arranged on two sides of the T-shaped terminal (1);
the T-shaped terminal (1) and the L-shaped terminal (2) form three bosses in the same direction, and two grooves for connecting buses are formed between the three bosses;
the thickness of the T-shaped terminal (1) and the L-shaped terminal (2) is at least 8mm.
2. A high-current terminal according to claim 1, wherein,
the T-shaped terminal (1) comprises a first horizontal part (101) and a first vertical part (102), and two corner grooves (103) are formed between the first horizontal part and the first vertical part;
the L-shaped terminal (2) comprises a second horizontal part (201) and a second vertical part (202), and an angle part (203) is formed between the second horizontal part and the second vertical part;
the two corner parts (203) are respectively arranged in the corner grooves (103), and a groove is formed between the first vertical part (102) and the second vertical part (202).
3. A high-current terminal according to claim 2, wherein,
a plurality of first open holes (104) are formed in the first vertical part (102) of the T-shaped terminal (1), and a plurality of second open holes (205) corresponding to the first open holes (104) are formed in the second vertical part (202) of each L-shaped terminal (2);
the T-shaped terminal comprises a T-shaped terminal body and is characterized in that a round hole (105) is formed in a first horizontal portion (101) of the T-shaped terminal body (1), a long waist hole (206) corresponding to the connecting hole is formed in a second horizontal portion (201) of each L-shaped terminal body (2), and the groove spacing between the L-shaped terminal body (2) and the T-shaped terminal body (1) is adjusted through the connecting position of the long waist hole (206) and the round hole (105).
4. A low-voltage air circuit breaker with high-current wiring terminal, characterized by, including circuit breaker body (3) and fixed frame (4), circuit breaker body (3) are installed on fixed frame (4), install a plurality of wiring terminal of any one of claims 1 to 3 on fixed frame (4), wiring terminal's one end is fixed on fixed frame (4), and the other end is connected with the generating line through fastener (6).
5. A low voltage air circuit breaker with high current terminals according to claim 4, characterized in that the fastener (6) is a bolt and nut assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223179545.2U CN218919327U (en) | 2022-11-28 | 2022-11-28 | High-current wiring terminal and low-voltage air circuit breaker applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223179545.2U CN218919327U (en) | 2022-11-28 | 2022-11-28 | High-current wiring terminal and low-voltage air circuit breaker applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218919327U true CN218919327U (en) | 2023-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223179545.2U Active CN218919327U (en) | 2022-11-28 | 2022-11-28 | High-current wiring terminal and low-voltage air circuit breaker applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218919327U (en) |
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2022
- 2022-11-28 CN CN202223179545.2U patent/CN218919327U/en active Active
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