Looped network incoming line air switch

Abstract

The utility model relates to air switch technology field, concretely relates to a looped net incoming line air switch, including base and cover set up on the upper cover plate of base, be equipped with circuit breaker on the upper cover plate, be equipped with looped net terminal, connect copper row and connect copper column on the base, including installation area one and installation area two on the base, connect copper column includes incoming line copper column and outgoing line copper column, looped net terminal passes through transition copper row and is connected with connecting copper row electricity, connecting copper row and incoming line copper column electricity are connected, incoming line copper column is connected with outgoing line copper column electricity through circuit breaker, the upper cover plate is seted up and is equipped with heat dissipation unit no.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker holder technology, and specifically provides a circuit breaker holder for ring network incoming lines. Background Technology

[0002] The power distribution system is a network system in the power system responsible for distributing electrical energy from step-down or high-voltage distribution substations to end users (residential, commercial, industrial, etc.) through primary and secondary equipment conversion and control. It is a key link connecting the transmission network and end-user equipment, and directly determines the reliability, power quality, and economic efficiency of power supply.

[0003] As the mounting base for air switches in a power distribution system, the air switch holder is an indispensable basic component. The air switch holder can fix the air switch in the distribution cabinet or busbar trunking and provide reliable electrical connection and mechanical support, enabling the air switch to perform functions such as segmented isolation, load transfer and fault clearing in the power supply system.

[0004] Existing circuit breaker holders suffer from problems such as poor heat dissipation, limited insulation performance, and poor stability of ring network connections. Therefore, how to design a circuit breaker holder for power distribution systems that is safe, has good heat dissipation, excellent arc isolation capability, and ring network functionality is an urgent problem to be solved. Utility Model Content

[0005] To solve the above problems, this utility model provides a ring network incoming line circuit breaker holder with good heat dissipation and insulation performance, which can improve support and connection stability.

[0006] This utility model provides a ring network incoming line circuit breaker base, including a base and an upper cover plate covering the base. A circuit breaker is provided on the upper cover plate, and a ring network terminal, a connecting copper busbar, and a connecting copper post are provided on the base. The base includes an installation area one and an installation area two. The ring network terminal is located in the installation area one, and the connecting copper busbar and the connecting copper post are located in the installation area two. The connecting copper post includes an incoming copper post and an outgoing copper post. The ring network terminal is electrically connected to the connecting copper busbar through a transition copper busbar, and the connecting copper busbar is electrically connected to the incoming copper post. The incoming copper post is electrically connected to the outgoing copper post through the circuit breaker. The circuit breaker is covered on the connecting copper post, and the connecting copper post supports the circuit breaker to form a heat dissipation unit. Heat dissipation units are provided on both the upper cover plate and the base. Arc isolation units are provided in both the installation area one and the installation area two.

[0007] Furthermore, the base includes a side plate, an end plate one, and an end plate two, with the end plate one and the end plate two respectively connected between the two ends of the side plate; the depth of the end plate one is greater than the depth of the end plate two, and a connecting ventilation groove one is provided on the end plate one, thereby forming a heat dissipation unit three that connects the end plate one and the end plate two below the base.

[0008] Furthermore, a mounting plate is connected between the side plate and the end plate 1, and the mounting plate 1 is located within the mounting area 1. A mounting plate 2 is connected between the side plate and the end plate 2, and the mounting plate 2 is located within the mounting area 2. An arc-blocking unit 4 is provided in the mounting area 2 and is mounted on the mounting plate 2. The inlet copper post is located near the end plate 2, and the outlet copper post is located near the mounting plate 1. The arc-blocking unit 4 is a hollow boss located on the upper part of the mounting plate 2, and the hollow boss is sleeved on the circumferential outer side of the outlet copper post.

[0009] Furthermore, an arc-blocking unit three is provided in the installation area two and is disposed on the installation plate two. The arc-blocking unit three is an insulating partition connecting the hollow boss and the end plate two. The insulating partition includes partition one, partition two and partition three. Partition one is located between the inlet copper post and the outlet copper post. Partition three is parallel to partition one and located outside the inlet copper post. Partition two is vertically connected between partition one and partition three. The end of partition three away from partition two is connected to the end plate two.

[0010] Furthermore, the height of mounting plate two is higher than that of mounting plate one, and mounting plate two and mounting plate one are connected by a connecting vertical plate, forming a stepped structure; a transition copper busbar extending into mounting area two is provided in mounting area one, and the upper end of the transition copper busbar is connected to mounting plate two by locking bolt two; an arc-blocking unit five is provided in mounting area two, and the arc-blocking unit five includes an insulating recess two connected to the lower end of mounting plate two, the insulating recess two is connected to the upper part of mounting plate two but not to the lower part of mounting plate two, and the locking bolt two is accommodated in the insulating recess two.

[0011] Furthermore, the arc-blocking unit five also includes an insulating recess one and an insulating recess three connected to the lower end of the mounting plate two; the insulating recess one is connected to the upper part of the mounting plate two but not to the lower part of the mounting plate two, and the incoming copper column is located directly above the insulating recess one; the connecting copper busbar is connected to the mounting plate two by a locking bolt three, the insulating recess three is located between the insulating recess one and the insulating recess two, the insulating recess three is connected to the upper part of the mounting plate two but not to the lower part of the mounting plate two, and the locking bolt three is accommodated in the insulating recess three.

[0012] Furthermore, an arc-blocking unit 2 is provided in the installation area 1 and is located on the mounting plate 1. The lower end of the transition copper busbar is connected to the mounting plate 1 by a locking bolt 1. The arc-blocking unit 2 includes an insulating recess 4 connected to the lower end of the mounting plate. The insulating recess 4 communicates with the upper part of the mounting plate 1 but does not communicate with the lower part of the mounting plate 1. The locking bolt 1 is accommodated in the insulating recess 4.

[0013] Furthermore, an arc-blocking unit 1 is provided in the installation area 1 and is mounted on the mounting plate 1. The arc-blocking unit 1 includes an arc-blocking plate 1 connected between the end plate 1 and the connecting vertical plate and an arc-blocking plate 2 located at the lower end of the upper cover plate. An arc-blocking plate 1 and an arc-blocking plate 2 are provided between adjacent phases. The arc-blocking plates 1 and 2 between adjacent phases are staggered and the upper end face of the arc-blocking plate 1 is located above the lower end face of the arc-blocking plate 2. The arc-blocking unit 3 also includes a partition plate 4 extending from the arc-blocking plate 1 toward the hollow boss. The partition plate 4 is parallel to the partition plate 1, and a partition plate 5 is perpendicularly connected between the partition plate 4 and the hollow boss.

[0014] Furthermore, a limiting platform is provided on the circuit breaker, and the upper end of the connecting copper column abuts against the limiting platform of the circuit breaker. The distance between the upper end face of the connecting copper column and the upper end face of the base is H1, and the distance between the lower end face of the limiting platform and the lower end face of the circuit breaker is H2, where H1 > H2. This forms a heat dissipation unit four located between the circuit breaker and the base, which is supported by the connecting copper column.

[0015] Furthermore, the upper cover plate is provided with heat dissipation unit one and heat dissipation unit two. The upper cover plate includes cover plate one and cover plate two. Cover plate one is located above installation area one and extends to installation area two. Heat dissipation unit one is disposed on cover plate one, and heat dissipation unit two is disposed on cover plate two. The copper post for cable outlet is disposed close to cover plate one. Heat dissipation unit one is a heat dissipation hole group one opened on cover plate one, which includes multiple heat dissipation holes one evenly arranged in the transverse direction. Heat dissipation unit two is a heat dissipation hole group two evenly opened on cover plate two, which includes multiple heat dissipation holes two evenly arranged in the longitudinal direction.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. The air switch holder in this solution can achieve good ventilation and heat dissipation through heat dissipation unit one, heat dissipation unit two, and heat dissipation unit three. This can prevent the internal temperature from rising rapidly, prevent the magnetic force of the magnetic coil from increasing due to temperature rise and triggering the protection mechanism to trip, prevent frequent circuit disconnection, prevent the contact surface temperature from exceeding the rated value due to heat concentration, prevent damage to the switch's opening and closing functions, prevent the insulation material from aging faster due to insufficient heat dissipation, prevent the risk of electrical accidents, and increase the service life of the product.

[0017] 2. The air switch base in this solution has a simple structure and strong versatility. Through arc isolation unit one, arc isolation unit two, arc isolation unit three, arc isolation unit four and arc isolation unit five, it can effectively isolate the electric arc between phases, improve the safety of product use and extend the service life of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the air switch holder according to an embodiment of the present utility model; Figure 2This is a partial structural schematic diagram of an air switch holder provided according to an embodiment of the present utility model (the upper cover plate is not shown). Figure 3 This is a schematic diagram of the structure of the base plate of the air switch holder according to an embodiment of the present utility model. Figure 1 (Looking down from above); Figure 4 This is a schematic diagram of the structure of the base plate of the air switch holder according to an embodiment of the present utility model. Figure 2 (Looking up) Figure 5 This is a partial cross-sectional view of the air switch holder provided according to an embodiment of the present utility model; Figure 6 This is a structural schematic diagram of the base in the air switch socket according to an embodiment of the present utility model; Figure 7 This is a structural schematic diagram of the base, ring network terminal, and connecting copper column in the air switch socket according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the overall structure of the air switch holder according to an embodiment of the present utility model (circuit breaker not shown). Figure 9 This is a structural schematic diagram of the heat dissipation unit three in the air switch socket provided according to an embodiment of the present utility model.

[0019] The reference numerals in the attached drawings include: 1. Base; 2. Top cover; 3. Ring network terminal; 4. Incoming copper post; 5. Outgoing copper post; 6. Connecting copper busbar; 7. Mounting area one; 8. Mounting area two; 9. Side plate; 10. End plate one; 11. End plate two; 12. Mounting plate one; 13. Hollow boss; 14. Partition one; 15. Partition two; 16. Partition three; 17. Insulating recess one; 18. Insulating recess two; 19. Insulating recess three; 20. Insulating recess four. 21. Connecting vertical plate 22. Transition copper busbar 23. Arc isolation plate one 24. Arc isolation plate two 25. Partition four 26. Partition five 27. Circuit breaker 28. Upper boss 29. Incoming ring network terminal 30. Outgoing ring network terminal 31. Heat dissipation unit three 32. Limiting platform 33. Connecting ventilation slot one 34. Connecting ventilation slot two 35. Cover plate one 36. Cover plate two 37. Heat dissipation hole one 38. Heat dissipation hole two 39. Heat dissipation unit four 40. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description is provided in conjunction with the appendix. Figure 1-9 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and do not constitute a limitation thereof.

[0021] A ring network incoming circuit breaker base includes a base 1 and an upper cover 2 covering the base 1. The upper cover 2 is equipped with a circuit breaker 28. The base 1 is equipped with a ring network terminal 3, a connecting copper busbar 6, and a connecting copper post. The base 1 includes a first installation area 7 and a second installation area 8. The ring network terminal 3 is located in the first installation area 7, and the connecting copper busbar 6 and the connecting copper post are located in the second installation area 8. The upper cover 2 includes a first cover 36 and a second cover 37. The first cover 36 is located above the first installation area 7 and extends to the second installation area 8. The connecting copper post includes an incoming copper post 4 and an outgoing copper post 5. The ring network terminal 3 includes two layers arranged in a stepped manner, specifically including an incoming ring network terminal 30 located in the lower layer and an outgoing ring network terminal 31 located in the upper layer. The incoming ring network terminal 30 is electrically connected to the connecting copper busbar 6 through a transition copper busbar 23.

[0022] The base 1 includes a side plate 9, an end plate 10, and an end plate 11. The end plate 10 and the end plate 11 are respectively connected between the two ends of the side plate 9. A mounting plate 12 is connected between the side plate 9 and the end plate 10. The mounting plate 12 is located in the mounting area 7. A mounting plate 13 is connected between the side plate 9 and the end plate 11. The mounting plate 13 is located in the mounting area 8. The mounting plate 13 and the mounting plate 12 are connected by a connecting vertical plate 22. The mounting plate 13 and the mounting plate 12 are stepped.

[0023] Installation area 1 7 is equipped with arc-blocking unit 1 and arc-blocking unit 2. Arc-blocking unit 1 is located between installation area 1 7 and the upper cover plate 2. Arc-blocking unit 2 is located at the bottom of installation area 1 7. Installation area 2 8 is equipped with arc-blocking unit 3, arc-blocking unit 4 and arc-blocking unit 5. Arc-blocking unit 3 is located between adjacent connecting copper busbars 6. Arc-blocking unit 4 is located at the top of installation area 2 8. Arc-blocking unit 5 is located at the bottom of installation area 2 8. Arc-blocking unit 1 and arc-blocking unit 2 are set on installation plate 1 12. Arc-blocking unit 3, arc-blocking unit 4 and arc-blocking unit 5 are set on installation plate 2 13. Incoming copper post 4 and outgoing copper post 5 are both set on installation plate 2 13. Incoming copper post 4 is set close to end plate 2 11. Outgoing copper post 5 is set close to installation plate 1 12.

[0024] like Figures 2-5 As shown, the arc-blocking unit includes an arc-blocking plate 24 connected between the end plate 10 and the connecting vertical plate 22, and an arc-blocking plate 25 disposed at the lower end of the upper cover plate 2. An arc-blocking plate 24 and an arc-blocking plate 25 are provided between adjacent phases. The arc-blocking plates 24 and 25 between adjacent phases are staggered. The upper end face of the arc-blocking plate 24 is located above the lower end face of the arc-blocking plate 25 to form a double-layer arc-blocking effect.

[0025] The installation area 17 is provided with a transition copper busbar 23 extending into the installation area 28. The height of the installation plate 213 is higher than that of the installation plate 12. The lower end of the transition copper busbar 23 is connected to the installation plate 12 by a locking bolt 1. The arc isolation unit 2 includes an insulating recess 4 21 connected to the lower end of the installation plate 12. The insulating recess 4 21 communicates with the upper part of the installation plate 12 but does not communicate with the lower part of the installation plate 12. The locking bolt 1 is accommodated in the insulating recess 4 21. The insulating recess 4 21 insulates the locking bolt 1 from the lower part of the base 1. The arc isolation unit 4 is a hollow boss 14 set on the upper part of the installation plate 213. The hollow boss 14 is sleeved on the circumferential outer side of the outgoing copper column 5. The hollow boss 14 provides arc isolation between the outgoing copper column 5 and the connecting copper busbar 6.

[0026] Arc-blocking unit three is an insulating partition connecting the hollow boss 14 and end plate two 11. The inlet copper post 4 and the outlet copper post 5 are located on the same straight line. The insulating partition includes partition one 15, partition two 16, and partition three 17. Partition one 15 is located between the inlet copper post 4 and the outlet copper post 5. Partition three 17 is parallel to partition one 15 and located outside the inlet copper post 4. Partition two 16 is perpendicularly connected between partition one 15 and partition three 17. Partition three 17 is located away from... One end of partition 2 16 is connected to end plate 2 11. The arc-blocking unit 3 also includes partition 4 26 extending from arc-blocking plate 1 24 toward hollow boss 14. Partition 4 26 is parallel to partition 1 15. Partition 5 27 is perpendicularly connected between partition 4 26 and hollow boss 14. Through partition 1 15, partition 2 16, partition 3 17, partition 4 26, partition 5 27 and hollow boss 14, the connecting copper busbars 6 between phases are completely arc-blocked.

[0027] The arc-blocking unit five includes an insulating recess 18 connected to the lower end of the mounting plate 2 13. The insulating recess 18 is connected to the upper part of the mounting plate 2 13 but not to the lower part of the mounting plate 2 13. The incoming copper column 4 is located directly above the insulating recess 18, and the insulating recess 18 insulates the incoming copper column 4 from the lower part of the base 1.

[0028] The upper end of the transition copper busbar 23 is connected to the mounting plate 2 13 by the locking bolt 2. The arc isolation unit 5 also includes an insulating recess 2 19 connected to the lower end of the mounting plate 2 13. The insulating recess 2 19 is connected to the upper part of the mounting plate 2 13 but not to the lower part of the mounting plate 2 13. The locking bolt 2 is accommodated in the insulating recess 2 19, and the insulating recess 2 19 insulates the locking bolt 2 from the lower part of the base 1.

[0029] The connecting copper busbar 6 is connected to the mounting plate 2 13 by locking bolt 3. The arc-blocking unit 5 includes an insulating recess 3 20 connected to the lower end of the mounting plate 2 13. The insulating recess 3 20 is located between the insulating recess 1 18 and the insulating recess 2 19. The insulating recess 3 20 is connected to the upper part of the mounting plate 2 13 but not to the lower part of the mounting plate 2 13. The locking bolt 3 is accommodated in the insulating recess 3 20. The insulating recess 3 20 insulates the locking bolt 3 from the lower part of the base 1. In this embodiment, multiple insulating recesses 3 20 are included.

[0030] The upper cover plate 2 has a heat dissipation unit 2 located above the second mounting area 8 and a heat dissipation unit 1 located near the first mounting area 7, such as Figure 1 , Figures 6-9 As shown, heat dissipation unit one is disposed on cover plate one 36, heat dissipation unit two is disposed on cover plate two 37, cover plate two 37 covers the inlet copper post 4 and the outlet copper post 5, and an upper boss 29 is provided at the connection between cover plate one 36 and cover plate two 37. The upper boss 29 is located between the outlet copper post 5 and cover plate two 37, and provides a space for the connecting parts below to prevent interference.

[0031] Heat dissipation unit one is a group of heat dissipation holes opened on cover plate 36, which is located near the outgoing copper post 5. Heat dissipation unit two is a group of heat dissipation holes evenly opened on cover plate 37, which is located between the incoming copper post 4 and the outgoing copper post 5. Each phase has a group of heat dissipation holes one and a group of heat dissipation holes two. Group of heat dissipation holes one includes multiple heat dissipation holes 38 evenly arranged laterally, and group of heat dissipation holes two includes multiple heat dissipation holes 39 evenly arranged longitudinally. The ventilation and heat dissipation performance of the circuit breaker holder is improved by the heat dissipation holes 38 and 39. Figure 7 As shown in the M direction, the lateral direction is as follows Figure 3 Shown in the N direction.

[0032] The end plate 10 on the base 1, located on one side of the mounting area 7, and the end plate 11 on the other side of the mounting area 8, are connected below the base 1, thus forming a... Figure 7 The heat dissipation unit 32 shown has an end plate 10 with a greater depth than the end plate 2 11. The end plate 10 has a connecting ventilation slot 34, which forms a heat dissipation unit 32 that connects the end plate 10 and the end plate 2 11 below the base 1. The end plate 2 11 has multiple connecting ventilation slots 35. The heat dissipation unit 32 is formed by connecting the ventilation slots 34, which forms a heat dissipation channel. The heat dissipation and ventilation performance can be further improved by connecting the ventilation slots 35.

[0033] Circuit breaker 28 is mounted on connecting copper posts, and the connecting copper posts support circuit breaker 28. Circuit breaker 28 does not abut against base 1 and forms a [missing information]. Figure 9The heat dissipation unit 40 shown has a limiting platform 33 on the circuit breaker 28. The upper end of the connecting copper column abuts against the limiting platform 33 of the circuit breaker 28. The distance between the upper end face of the connecting copper column and the upper end face of the base 1 is H1, and the distance between the lower end face of the limiting platform 33 and the lower end face of the circuit breaker 28 is H2. H1 > H2, thus forming a heat dissipation channel, i.e., heat dissipation unit 40.

[0034] In use, ring network terminal 3 is electrically connected to connecting copper busbar 6 via transition copper busbar 23. Connecting copper busbar 6 is electrically connected to incoming copper post 4. Incoming copper post 4 is electrically connected to outgoing copper post 5 via circuit breaker 28. The bottom of outgoing copper post 5 is connected to busbar. Busbar as follows Figure 9 As shown in B.

[0035] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0036] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A ring network incoming line circuit breaker holder, characterized in that, Includes a base (1) and an upper cover plate (2) covering the base (1). The upper cover plate (2) is equipped with a circuit breaker (28). The base (1) is equipped with a ring network terminal (3), a connecting copper busbar (6), and a connecting copper post. The base (1) includes an installation area one (7) and an installation area two (8). The ring network terminal (3) is located in the installation area one (7), and the connecting copper busbar (6) and the connecting copper post are located in the installation area two (8). The connecting copper post includes an incoming copper post (4) and an outgoing copper post (5). The network terminal (3) is electrically connected to the connecting copper bus (6) through the transition copper bus (23), the connecting copper bus (6) is electrically connected to the incoming copper column (4), and the incoming copper column (4) is electrically connected to the outgoing copper column (5) through the circuit breaker (28). The circuit breaker (28) is covered on the connecting copper column and the connecting copper column supports the circuit breaker (28) to form a heat dissipation unit. Heat dissipation units are provided on the upper cover plate (2) and the base (1). Arc isolation units are provided in both the first installation area (7) and the second installation area (8).

2. The ring network incoming line circuit breaker holder according to claim 1, characterized in that, The base (1) includes a side plate (9), an end plate one (10) and an end plate two (11). The end plate one (10) and the end plate two (11) are respectively connected between the two ends of the side plate (9). The depth of the end plate one (10) is greater than the depth of the end plate two (11), and a connecting ventilation groove one (34) is provided on the end plate one (10), thereby forming a heat dissipation unit three (32) formed by the end plate one (10) and the end plate two (11) connected below the base (1).

3. The ring network incoming line circuit breaker holder according to claim 2, characterized in that, The side plate (9) is connected to the end plate (10) by a mounting plate (12) and the mounting plate (12) is located in the installation area (7). The side plate (9) is connected to the end plate (11) by a mounting plate (13) and the mounting plate (13) is located in the installation area (8). The installation area (8) is provided with an arc-blocking unit (4) and the arc-blocking unit (4) is set on the mounting plate (13). The inlet copper column (4) is set close to the end plate (11) and the outlet copper column (5) is set close to the mounting plate (12). The arc-blocking unit (4) is a hollow boss (14) set on the upper part of the mounting plate (13). The hollow boss (14) is sleeved on the circumferential outer side of the outlet copper column (5).

4. The ring network incoming line circuit breaker holder according to claim 3, characterized in that, The installation area 2 (8) is provided with an arc-blocking unit 3 and the arc-blocking unit 3 is set on the installation plate 2 (13). The arc-blocking unit 3 is an insulating partition connected between the hollow boss (14) and the end plate 2 (11). The insulating partition includes partition 1 (15), partition 2 (16) and partition 3 (17). Partition 1 (15) is located between the inlet copper column (4) and the outlet copper column (5). Partition 3 (17) is parallel to partition 1 (15) and located outside the inlet copper column (4). Partition 2 (16) is vertically connected between partition 1 (15) and partition 3 (17). The end of partition 3 (17) away from partition 2 (16) is connected to the end plate 2 (11).

5. The ring network incoming line circuit breaker holder according to claim 4, characterized in that, The height of the second mounting plate (13) is higher than that of the first mounting plate (12). The second mounting plate (13) and the first mounting plate (12) are connected by a connecting vertical plate (22). The second mounting plate (13) and the first mounting plate (12) are in a stepped shape. The first mounting area (7) is provided with a transition copper busbar (23) extending into the second mounting area (8). The upper end of the transition copper busbar (23) is connected to the second mounting plate (13) by a locking bolt (2). The second mounting area (8) is provided with an arc-blocking unit (5) and the arc-blocking unit (5) includes an insulating recess (29) connected to the lower end of the second mounting plate (13). The insulating recess (29) is connected to the upper part of the second mounting plate (13) but not to the lower part of the second mounting plate (13). The locking bolt (2) is accommodated in the insulating recess (29).

6. The ring network incoming line circuit breaker holder according to claim 5, characterized in that, The arc-blocking unit five also includes an insulating recess one (18) and an insulating recess three (20) connected to the lower end of the mounting plate two (13); the insulating recess one (18) is connected to the upper part of the mounting plate two (13) but not to the lower part of the mounting plate two (13), and the inlet copper column (4) is located directly above the insulating recess one (18); the connecting copper busbar (6) is connected to the mounting plate two (13) by the locking bolt three, the insulating recess three (20) is located between the insulating recess one (18) and the insulating recess two (19), the insulating recess three (20) is connected to the upper part of the mounting plate two (13) but not to the lower part of the mounting plate two (13), and the locking bolt three is accommodated in the insulating recess three (20).

7. The ring network incoming line circuit breaker holder according to claim 6, characterized in that, The installation area 1 (7) is provided with an arc-blocking unit 2 and the arc-blocking unit 2 is set on the installation plate 1 (12). The lower end of the transition copper busbar (23) is connected to the installation plate 1 (12) by a locking bolt 1. The arc-blocking unit 2 includes an insulating recess 4 (21) connected to the lower end of the installation plate 1 (12). The insulating recess 4 (21) is connected to the upper part of the installation plate 1 (12) but not connected to the lower part of the installation plate 1 (12). The locking bolt 1 is accommodated in the insulating recess 4 (21).

8. The ring network incoming line circuit breaker holder according to claim 7, characterized in that, The installation area 1 (7) is provided with an arc-blocking unit 1 and the arc-blocking unit 1 is set on the installation plate 1 (12). The arc-blocking unit 1 includes an arc-blocking plate 1 (24) connected between the end plate 1 (10) and the connecting vertical plate (22) and an arc-blocking plate 2 (25) set at the lower end of the upper cover plate (2). The adjacent phases are provided with arc-blocking plate 1 (24) and arc-blocking plate 2 (25). The arc-blocking plate 1 (24) and arc-blocking plate 2 (25) between the adjacent phases are staggered and the upper end face of arc-blocking plate 1 (24) is located above the lower end face of arc-blocking plate 2 (25). The arc-blocking unit 3 also includes a partition plate 4 (26) extending from the arc-blocking plate 1 (24) toward the hollow boss (14). The partition plate 4 (26) is parallel to the partition plate 1 (15). The partition plate 4 (26) and the hollow boss (14) are vertically connected by a partition plate 5 (27).

9. The ring network incoming line circuit breaker holder according to claim 8, characterized in that, The circuit breaker (28) has a limiting platform (33) provided on it. The upper end of the connecting copper column abuts against the limiting platform (33) of the circuit breaker (28). The distance between the upper end face of the connecting copper column and the upper end face of the base (1) is H1, and the distance between the bottom end face of the limiting platform (33) and the bottom end face of the circuit breaker (28) is H2. H1 > H2, thereby forming a heat dissipation unit four (40) located between the circuit breaker (28) and the base (1) by the connecting copper column supporting the circuit breaker (28).

10. The ring network incoming line circuit breaker holder according to claim 9, characterized in that, The upper cover plate (2) is provided with a heat dissipation unit 1 and a heat dissipation unit 2. The upper cover plate (2) includes a cover plate 1 (36) and a cover plate 2 (37). The cover plate 1 (36) is located above the installation area 1 (7) and extends to the installation area 2 (8). The heat dissipation unit 1 is set on the cover plate 1 (36), and the heat dissipation unit 2 is set on the cover plate 2 (37). The copper column (5) is set close to the cover plate 1 (36). The heat dissipation unit 1 is a heat dissipation hole group 1 opened on the cover plate 1 (36). The heat dissipation hole group 1 includes a plurality of heat dissipation holes 1 (38) evenly arranged in the transverse direction. The heat dissipation unit 2 is a heat dissipation hole group 2 evenly opened on the cover plate 2 (37). The heat dissipation hole group 2 includes a plurality of heat dissipation holes 2 (39) evenly arranged in the longitudinal direction.

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