Novel double-bus double-section combined electric appliance

Abstract

The utility model relates to a novel double-bus double-section combined electric appliance, which comprises a first circuit breaker and a second circuit breaker which are symmetrically arranged on an underframe, and is characterized in that the first circuit breaker is connected with a first upper current transformer and a first lower current transformer, the first upper current transformer is connected with a first overhead transition main bus, and the second circuit breaker is connected with a second overhead transition main bus; a first angle type isolation grounding switch is connected between the first overhead transition main bus and the first lower current transformer, the first angle type isolation grounding switch is connected with the first main bus, a second circuit breaker is connected with a second upper current transformer and a second lower current transformer, the second upper current transformer is connected with the second overhead transition main bus, and the second lower current transformer is connected with the second overhead transition main bus. A second angle type isolation grounding switch is connected between the second overhead transition main bus and the second lower current transformer, and the second angle type isolation grounding switch is connected with the second main bus. The beneficial effects of the utility model are that after the double-bus double-section interval circuit breakers are symmetrically arranged, only two interval space positions are occupied, and the space is greatly saved.

Description

Technical Field

[0001] This utility model belongs to the field of power switchgear technology, and specifically relates to a novel double-bus double-segment combined electrical appliance. Background Technology

[0002] In power transmission and transformation lines, the double-bus, double-section connection configuration is widely used. Its advantages include: 1. High power supply reliability: By switching between two sets of busbar isolating switches, one busbar can be inspected in turn without power interruption; if one busbar fails, power supply can be quickly restored. 2. Flexible dispatching: Each power source and circuit load can be arbitrarily allocated to a specific set of busbars, flexibly adapting to various operating modes and power flow changes in the system. For indoor bays, the double-bus, double-section connection configuration typically involves designing two sets of double-bus, single-section switchgear to meet actual needs, resulting in a larger space and footprint. With the development of new power systems, miniaturized and intelligent substations are becoming the mainstream trend, and compact, fully functional new switchgear will be the future development trend. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a novel double-bus double-segment combined electrical appliance with a simple, compact structure and space-saving design.

[0004] This invention is achieved through the following technical solution:

[0005] A novel double-busbar, double-segment combined electrical appliance includes a first circuit breaker and a second circuit breaker symmetrically arranged on a base frame. The first circuit breaker connects a first upper current transformer and a first lower current transformer; the first upper current transformer connects to a first overhead transition main busbar; a first delta-type isolating grounding switch connects the first overhead transition main busbar and the first lower current transformer; the first delta-type isolating grounding switch connects to the first main busbar; the second circuit breaker connects a second upper current transformer and a second lower current transformer; the second upper current transformer connects to a second overhead transition main busbar; a second delta-type isolating grounding switch connects the second overhead transition main busbar and the second lower current transformer; the second delta-type isolating grounding switch connects to the second main busbar.

[0006] The first overhead transition main busbar is connected to the third overhead transition main busbar, the third overhead transition main busbar is connected to the third angle-type isolating grounding switch, and the third angle-type isolating grounding switch is connected to the third main busbar.

[0007] The second overhead transition main busbar is connected to the fourth overhead transition main busbar, the fourth overhead transition main busbar is connected to the fourth angle-type isolating grounding switch, and the fourth angle-type isolating grounding switch is connected to the fourth main busbar.

[0008] The third angle-shaped isolating grounding switch and the third main busbar are connected in sequence to the third external tee and the third internal tee. The third corrugated pipe is connected between the third angle-shaped isolating grounding switch and the third external tee. The third overhead transition main busbar is placed on the third internal tee through the third support rod.

[0009] The first overhead transition main busbar and the third overhead transition main busbar are connected by the first corrugated pipe.

[0010] The third external tee is placed on the base frame via the third main support rod.

[0011] The fourth angle-shaped isolating grounding switch and the fourth main busbar are connected in sequence to the fourth external tee and the fourth internal tee. The fourth corrugated pipe is connected between the fourth angle-shaped isolating grounding switch and the fourth external tee. The fourth overhead transition main busbar is placed on the fourth internal tee through the fourth support rod.

[0012] The second overhead transition main busbar and the fourth overhead transition main busbar are connected by a second corrugated pipe.

[0013] The fourth external tee is placed on the base frame via the fourth main support rod.

[0014] The base frame is equipped with a first control cabinet and a second control cabinet.

[0015] The beneficial effects of this utility model are as follows: This double-bus double-section combined electrical appliance consists of two circuit breakers arranged symmetrically. Each circuit breaker is responsible for segmenting two different busbars. Current transformers are installed on both the dynamic and static sides of the circuit breakers to provide protection and measurement. The original double-bus single-section bay required two bay spaces, and the double-bus double-section bay required four bay spaces. After the double-bus double-section bay circuit breakers are arranged symmetrically, they only require two bay spaces, greatly saving space. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Appendix Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Appendix Figure 2 This is a top view of the structure of this utility model;

[0019] In the diagram, 1 is the base frame, 2 is the first circuit breaker, 3 is the second circuit breaker, 4 is the first upper current transformer, 5 is the first lower current transformer, 6 is the first overhead transition main busbar, 7 is the first delta-type isolating grounding switch, 8 is the first main busbar, 9 is the second upper current transformer, 10 is the second lower current transformer, 11 is the second overhead transition main busbar, 12 is the second delta-type isolating grounding switch, 13 is the second main busbar, 14 is the third overhead transition main busbar, 15 is the third delta-type isolating grounding switch, and 16 is the third upper current transformer. 17. Third main busbar, 18. Fourth overhead transition main busbar, 19. Fourth angle-type isolating grounding switch, 20. Fourth main busbar, 21. Third external tee, 22. Third internal tee, 23. Third corrugated pipe, 24. Third support rod, 25. First corrugated pipe, 26. Third main support rod, 27. Fourth external tee, 28. Fourth corrugated pipe, 29. Fourth support rod, 30. Second corrugated pipe, 31. Fourth main support rod, 32. First control cabinet, 33. Second control cabinet. Detailed Implementation

[0020] The attached figure shows a specific embodiment of this utility model. This embodiment includes a first circuit breaker 2 and a second circuit breaker 3 symmetrically arranged on a base frame 1. The first circuit breaker 2 connects a first upper current transformer 4 and a first lower current transformer 5. The first upper current transformer 4 connects to a first overhead transition main busbar 6. A first angle-type isolating grounding switch 7 connects the first overhead transition main busbar 6 and the first lower current transformer 5. The first angle-type isolating grounding switch 7 connects to the first main busbar 8. The second circuit breaker 3 connects a second upper current transformer 9 and a second lower current transformer 10. The second upper current transformer 9 connects to a second overhead transition main busbar 11. A second angle-type isolating grounding switch 12 connects the second overhead transition main busbar 11 and the second lower current transformer 10. The second angle-type isolating grounding switch 12 connects to the second main busbar 13. The first overhead transition main busbar 6 is connected to the third overhead transition main busbar 14. The third overhead transition main busbar 14 is connected to the third angle-type isolating grounding switch 15, and the third angle-type isolating grounding switch 15 is connected to the third main busbar 16. The second overhead transition main busbar 11 is connected to the fourth overhead transition main busbar 17. The fourth overhead transition main busbar 17 is connected to the fourth angle-type isolating grounding switch 18, and the fourth angle-type isolating grounding switch 18 is connected to the fourth main busbar 19. The third angle-type isolating grounding switch 15 and the third main busbar 16 are connected sequentially to the third external tee 20 and the third internal tee 21. The third angle-type isolating grounding switch 15 and the third external tee 20 are connected to the third corrugated pipe 22. The third overhead transition main busbar 14 is placed on the third internal tee 21 through the third support rod 23. The first overhead transition main busbar 6 and the third overhead transition main busbar 14 are connected through the first corrugated pipe 24. The third external tee 20 is mounted on the base frame 1 via the third main support rod 25. The fourth external tee 26 and the fourth internal tee 27 are sequentially connected between the fourth angle-type isolating grounding switch 18 and the fourth main busbar 19. A fourth corrugated pipe 28 connects the fourth angle-type isolating grounding switch 18 and the fourth external tee 26. The fourth overhead transition main busbar 17 is mounted on the fourth internal tee 27 via the fourth support rod 29. The second overhead transition main busbar 11 and the fourth overhead transition main busbar 17 are connected via the second corrugated pipe 30. The fourth external tee 26 is mounted on the base frame 1 via the fourth main support rod 31. The first control cabinet 32 ​​and the second control cabinet 33 are installed on the base frame 1.

[0021] This novel double-busbar, double-section combined electrical appliance adopts a common enclosure for the main busbar and separate enclosures for the remaining three phases. The appliance consists of two symmetrically arranged circuit breakers, each responsible for segmenting two different busbars. Current transformers are installed on both the dynamic and static sides of the circuit breakers for protection and measurement. The main busbar is mounted on a base frame, and the angle-type isolating grounding switches are all located on the main busbar. The overhead transition busbar is fixed to the casing via supports. The appliance features a compact structure, high reliability, high modularity, and convenient and quick installation and commissioning. The second bay section has a base frame 1 for the second circuit breaker 3. The second main busbar 13 is fixed on the base frame 1, and a second angle-type isolating grounding switch 12 is arranged above it. It is connected to the moving side of the second circuit breaker 3 through a second lower current transformer 10. The stationary side of the second circuit breaker 3 is connected to the second overhead transition main busbar 11 through a second upper current transformer 9. The second overhead transition main busbar 11 and the fourth overhead transition main busbar 17 are connected through a second corrugated pipe 30 to facilitate adjustment of installation errors. In the base frame 1 section of the first bay section without a circuit breaker, the fourth overhead transition main busbar 17 and the fourth angle-type isolating grounding switch 18 are connected through a corrugated pipe and fixed to the bay. It is fixed to the fourth main busbar 19 through a fourth external tee 26 and a fourth internal tee 27, realizing the segmentation by the second main busbar 13 and the fourth main busbar 19. Similarly, in the first bay section with the circuit breaker on the base frame 1, the first main busbar 8 is fixed to the base frame 1, and the first angle-type isolating grounding switch 7 is arranged above it. It is connected to the moving side of the first circuit breaker 2 through the first lower current transformer 5, and the stationary side of the first circuit breaker 2 is connected to the first overhead transition main busbar 6 through the first upper current transformer 4. The first overhead transition main busbar 6 and the third overhead transition main busbar 14 are connected through the first corrugated pipe 24 to facilitate adjustment of installation errors. In the second bay section without the circuit breaker on the base frame 1, the third overhead transition main busbar 14 and the third angle-type isolating grounding switch 15 are connected through the corrugated pipe and fixed to the bay. It is fixed to the third main busbar 16 through the third external tee 20 and the third internal tee 21, realizing the segmentation by the third main busbar 16 and the first main busbar 8. The new double-bus double-segment combined electrical appliance arranges the two circuit breakers symmetrically, respectively, on different bay base frames, greatly reducing the overall space.

Claims

1. A novel double-bus double-section combined electrical appliance, comprising a first circuit breaker (2) and a second circuit breaker (3) symmetrically arranged on a base frame (1), characterized in that: The first circuit breaker (2) connects the first upper current transformer (4) and the first lower current transformer (5). The first upper current transformer (4) connects to the first overhead transition main bus (6). The first overhead transition main bus (6) and the first lower current transformer (5) are connected to a first angle-type isolating grounding switch (7). The first angle-type isolating grounding switch (7) connects to the first main bus (8). The second circuit breaker (3) connects the second upper current transformer (9) and the second lower current transformer (10). The second upper current transformer (9) connects to the second overhead transition main bus (11). The second overhead transition main bus (11) and the second lower current transformer (10) are connected to a second angle-type isolating grounding switch (12). The second angle-type isolating grounding switch (12) connects to the second main bus (13).

2. The novel double-bus double-segment combined electrical appliance according to claim 1, characterized in that: The first overhead transition main bus (6) is connected to the third overhead transition main bus (14), the third overhead transition main bus (14) is connected to the third angle type isolation grounding switch (15), and the third angle type isolation grounding switch (15) is connected to the third main bus (16).

3. The novel double-bus double-segment combined electrical appliance according to claim 1, characterized in that: The second overhead transition main bus (11) is connected to the fourth overhead transition main bus (17), the fourth overhead transition main bus (17) is connected to the fourth angle type isolation grounding switch (18), and the fourth angle type isolation grounding switch (18) is connected to the fourth main bus (19).

4. The novel double-bus double-segment combined electrical appliance according to claim 2, characterized in that: The third angle-shaped isolation grounding switch (15) and the third main busbar (16) are connected in sequence by the third external tee (20) and the third internal tee (21), and the third corrugated pipe (22) is connected between the third angle-shaped isolation grounding switch (15) and the third external tee (20). The third overhead transition main busbar (14) is placed on the third internal tee (21) through the third support rod (23).

5. The novel double-bus double-segment combined electrical appliance according to claim 2, characterized in that: The first overhead transition main busbar (6) and the third overhead transition main busbar (14) are connected by the first corrugated pipe (24).

6. The novel double-bus double-segment combined electrical appliance according to claim 4, characterized in that: The third external tee (20) is placed on the base frame (1) via the third main support rod (25).

7. The novel double-bus double-segment combined electrical appliance according to claim 3, characterized in that: The fourth angle-type isolating grounding switch (18) and the fourth main busbar (19) are connected in sequence by the fourth outer tee (26) and the fourth inner tee (27). The fourth corrugated pipe (28) is connected between the fourth angle-type isolating grounding switch (18) and the fourth outer tee (26). The fourth overhead transition main busbar (17) is placed on the fourth inner tee (27) through the fourth support rod (29).

8. The novel double-bus double-segment combined electrical appliance according to claim 3, characterized in that: The second overhead transition main busbar (11) and the fourth overhead transition main busbar (17) are connected by the second corrugated pipe (30).

9. The novel double-bus double-segment combined electrical appliance according to claim 7, characterized in that: The fourth external tee (26) is placed on the base frame (1) via the fourth main support rod (31).

10. The novel double-bus double-segment combined electrical appliance according to claim 1, characterized in that: The first control cabinet (32) and the second control cabinet (33) are installed on the base frame (1).

Images