Novel dual-power multi-standby plug-in low-voltage switch cabinet

Abstract

The utility model discloses a novel dual-power multi-standby plug-in low-voltage switch cabinet, which comprises a base, a bus coupler cabinet mounted in the middle of the top end of the base, a first wire inlet cabinet mounted on one side of the top end of the base, and a second wire inlet cabinet mounted on the other side of the top end of the base, drawer type circuit breakers are installed in the middle of the bus coupler cabinet, the middle of the first wire inlet cabinet and the middle of the second wire inlet cabinet respectively, a change-over switch is installed on one side of the top of the front face of the bus coupler cabinet, an automatic switching microcomputer is installed on the other side of the top of the front face of the bus coupler cabinet, and two wire outlet drawers are installed at the bottom of the first wire inlet cabinet and the bottom of the second wire inlet cabinet respectively. According to the novel dual-power-supply multi-standby plug-in low-voltage switch cabinet, the two wire inlet cabinets and the bus coupler cabinet of the low-voltage switch cabinet adopt electrical interlocking to ensure that the three wire inlet cabinets and the bus coupler cabinet cannot be switched on at the same time, and a standby power automatic switching microcomputer and a change-over switch are additionally arranged on the contact cabinet to realize three switching functions of standby power automatic switching, manual operation and stopping.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically a novel dual-power multi-standby pluggable low-voltage switchgear. Background Technology

[0002] Low-voltage switchgear is electrical equipment used in low-voltage power distribution systems. It is mainly used for receiving and distributing power and performing functions such as control, protection, and monitoring.

[0003] However, existing low-voltage switchgear has the following drawbacks:

[0004] (1) One of the two incoming lines of the existing low-voltage switchgear is de-energized, the bus tie cannot be automatically closed, and there is no automatic transfer function.

[0005] (2) When the outgoing switch of the existing low-voltage switchgear fails and needs to be repaired or replaced, the power supply will be interrupted, causing the equipment to stop.

[0006] Considering the above, a new type of dual-power, multi-backup pluggable low-voltage switchgear is proposed to solve the aforementioned problems. Utility Model Content

[0007] The purpose of this utility model is to provide a novel dual-power multi-backup pluggable low-voltage switchgear to solve the problems mentioned in the background art, such as the failure of one of the two incoming lines of the existing low-voltage switchgear to automatically close the bus tie, the lack of backup automatic transfer function, and the intermittent power supply when the outgoing switch of the low-voltage switchgear fails and needs to be repaired or replaced, which leads to equipment shutdown.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a novel dual-power multi-standby pluggable low-voltage switchgear, comprising a base, a bus tie cabinet installed in the middle of the top of the base, a first incoming line cabinet installed on one side of the top of the base, and a second incoming line cabinet installed on the other side of the top of the base. Drawer-type circuit breakers are installed in the middle of the bus tie cabinet, the middle of the first incoming line cabinet, and the middle of the second incoming line cabinet. A transfer switch is installed on one side of the top front of the bus tie cabinet, and an automatic transfer microcomputer is installed on the other side of the top front of the bus tie cabinet. Two outgoing line drawers are installed at the bottom of both the first and second incoming line cabinets, and molded case switches are installed on the front of the outgoing line drawers.

[0009] When using the novel dual-power multi-standby pluggable low-voltage switchgear with this technical solution, the two incoming line cabinets and the bus tie cabinet of the low-voltage switchgear are electrically interlocked to ensure that the three units cannot be closed at the same time. In addition, an automatic transfer microcomputer and a transfer switch are added to the tie cabinet to realize three functions of automatic transfer, manual transfer, and stop.

[0010] As a preferred embodiment of this utility model, two horizontal busbar clamps are installed at the top of the inner wall of the first incoming line cabinet and the top of the inner wall of the second incoming line cabinet. Three reverse-flow busbar clamps are installed at the middle of the inner wall of the bus tie cabinet, the middle of the inner wall of the first incoming line cabinet, and the middle of the inner wall of the second incoming line cabinet. The busbar clamps are used to connect and fix the busbars, and reverse flow is achieved using the busbar frame side.

[0011] As a preferred embodiment of this invention, casters are fixedly installed at both ends of the bottom of the base. The casters facilitate the transportation of the switch cabinet.

[0012] As a preferred embodiment of this utility model, two knockout holes are provided on one side of the top of the first incoming line cabinet and one side of the top of the second incoming line cabinet. The knockout holes are provided for cable entry.

[0013] In a preferred embodiment of this invention, side sealing plates are installed on the side walls of both the first and second incoming line cabinets. These side sealing plates effectively seal the sides of the switchgear.

[0014] As a preferred embodiment of this utility model, lifting rings are installed at both ends of the top of the busbar cabinet, both ends of the top of the first incoming line cabinet, and both ends of the top of the second incoming line cabinet. These lifting rings facilitate the movement of the cabinets.

[0015] In a preferred embodiment of this invention, several first heat dissipation holes are provided on one side of the top of the first incoming line cabinet and one side of the top of the second incoming line cabinet. These first heat dissipation holes allow heat generated during switch cabinet operation to be dissipated from above.

[0016] As a preferred embodiment of this invention, several second heat dissipation holes are provided at the bottom of the front of the bus tie cabinet, the bottom of the front of the first incoming line cabinet, and the bottom of the front of the second incoming line cabinet. These second heat dissipation holes allow heat generated during switchgear operation to dissipate from the bottom.

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

[0018] 1. The two incoming line cabinets and the bus tie cabinet of this low-voltage switchgear are electrically interlocked to ensure that the three units cannot be closed at the same time. In addition, an automatic transfer microcomputer and a changeover switch are added to the tie cabinet to realize three functions of automatic transfer, manual transfer and stop, which is convenient to use.

[0019] 2. This low-voltage switchgear adopts a modular design and plug-in assembly, with dual power supply outputs. The low-voltage output cabinet has two outputs, and each output is connected in parallel with two identical low-voltage molded case switches as backups for each other. When one of the switches fails and needs to be repaired or replaced, the other switch can be manually closed to ensure uninterrupted power supply without affecting the repair or replacement of the faulty switch. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present utility model;

[0021] Figure 2 This is a plan view of the present invention after it has been unfolded.

[0022] Figure 3 This is a partial plan view of the present invention;

[0023] Figure 4 This is the general schematic diagram of the present invention;

[0024] Figure 5 The principle of the first and second incoming line cabinets of this utility model Figure 1 ;

[0025] Figure 6 The principle of the first and second incoming line cabinets of this utility model Figure 2 ;

[0026] Figure 7 The principle of the motherboard cabinet of this utility model Figure 1 ;

[0027] Figure 8 The principle of the motherboard cabinet of this utility model Figure 2 .

[0028] In the diagram: 1. Bus tie cabinet; 2. First incoming line cabinet; 3. Second incoming line cabinet; 4. Drawer-type circuit breaker; 5. Knockout hole; 6. First heat dissipation hole; 7. Second heat dissipation hole; 8. Side sealing plate; 9. Lifting ring; 10. Changeover switch; 11. Automatic transfer switch; 12. Outgoing line drawer; 13. Molded case switch; 14. Base; 15. Casters; 16. Horizontal busbar clamp; 17. Reverse busbar clamp. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-8This utility model provides a novel dual-power multi-standby pluggable low-voltage switchgear, including a base 14. A bus tie cabinet 1 is installed in the middle of the top of the base 14. A first incoming line cabinet 2 is installed on one side of the top of the base 14, and a second incoming line cabinet 3 is installed on the other side of the top of the base 14. Drawer-type circuit breakers 4 are installed in the middle of the bus tie cabinet 1, the middle of the first incoming line cabinet 2, and the middle of the second incoming line cabinet 3. A changeover switch 10 is installed on one side of the top front of the bus tie cabinet 1, and an automatic transfer microcomputer 11 is installed on the other side of the top front of the bus tie cabinet 1 to add the switching function. Two outgoing line drawers 12 are installed at the bottom of the first incoming line cabinet 2 and the bottom of the second incoming line cabinet 3. A molded case switch 13 is installed on the front of the outgoing line drawer 12 to control the switching of the outgoing line circuit.

[0031] In use, the two incoming line cabinets and bus tie cabinet 1 are electrically interlocked to ensure that the three units cannot be closed at the same time. The automatic transfer microcomputer 11 and the transfer switch 10 are added to the tie cabinet to realize the three functions of automatic transfer, manual transfer, and stop. The low-voltage switch cabinet adopts a modular design and plug-in assembly, with dual power supply outputs. The low-voltage outgoing line cabinet has two outgoing lines, and each outgoing line is connected in parallel with two identical low-voltage molded case switches 13 as backups for each other. When one of the switches fails and needs to be repaired or replaced, the other switch can be manually closed to ensure uninterrupted power supply without affecting the repair or replacement of the faulty switch. The bus channels are consistent, and the outgoing line contacts of the outgoing line drawer 12 are short-circuited in pairs.

[0032] Two horizontal busbar clamps 16 are installed on the top of the inner wall of the first incoming line cabinet 2 and the top of the inner wall of the second incoming line cabinet 3. Three reverse busbar clamps 17 are installed in the middle of the inner wall of the bus tie cabinet 1, the middle of the inner wall of the first incoming line cabinet 2 and the middle of the inner wall of the second incoming line cabinet 3 for fixing the busbars. Universal wheels 15 are fixedly installed at both ends of the bottom of the base 14 for easy movement. Two knock-out holes 5 are opened on one side of the top of the first incoming line cabinet 2 and the top of the second incoming line cabinet 3 for threading wires.

[0033] In use, the horizontal busbar clamp 16 and the reverse busbar clamp 17 are used to connect and fix the busbars in the switch cabinet. When reversed, the busbars are reversed from the side of the busbar frame. The casters 15 facilitate the transportation of the switch cabinet and have a locking function to ensure the stable placement of the switch cabinet. The knock-out holes 5 are used for cable entry.

[0034] Side sealing plates 8 are installed on the side walls of the first incoming line cabinet 2 and the second incoming line cabinet 3 to provide a sealing function. Lifting rings 9 are installed at both ends of the top of the bus tie cabinet 1, both ends of the top of the first incoming line cabinet 2, and both ends of the top of the second incoming line cabinet 3 for hoisting. Several first heat dissipation holes 6 are provided on one side of the top of the first incoming line cabinet 2 and one side of the top of the second incoming line cabinet 3. Several second heat dissipation holes 7 are provided at the bottom of the front of the bus tie cabinet 1, the bottom of the front of the first incoming line cabinet 2, and the bottom of the front of the second incoming line cabinet 3 for heat dissipation.

[0035] During use, the side sealing plate 8 seals the sides of the switch cabinet, protecting the internal electrical components. The lifting ring 9 facilitates the hoisting and transportation of the cabinet. The first heat dissipation hole 6 and the second heat dissipation hole 7 allow the heat from the top and bottom of the switch cabinet to be discharged during operation, preventing overheating of the internal electrical components.

[0036] In practical use, this new type of dual-power multi-standby pluggable low-voltage switchgear uses electrical interlocking between the two incoming line cabinets and the bus tie cabinet 1 to ensure that the three units cannot be closed simultaneously. An automatic transfer microcomputer 11 and a transfer switch 10 are added to the tie cabinet to realize three activation functions: automatic transfer, manual, and stop. Stop: When the transfer switch 10 is in the stop position, the bus tie cabinet 1 cannot be closed. Even if the switch has operating power, it can only be opened to prevent operators from accidentally closing the switch and causing electric shock. Manual: When the transfer switch 10 is in the stop position... In the manual position, the automatic transfer switch (ATS) stops working, and both incoming line cabinets can be manually closed. When both incoming line cabinets are closed, the tie switch cannot be closed to prevent parallel operation. The tie switch can only be manually closed after one incoming line cabinet loses power or is manually tripped due to a line fault. Automatic transfer manual reset: When the changeover switch 10 is in the automatic transfer standby position, the microcomputer interlocks the automatic transfer standby unlock. Setting the microcomputer to automatic transfer manual reset, after both incoming line cabinets are energized and closed, if either incoming line cabinet loses voltage, the de-energized incoming line cabinet trips after a 5-second delay, and the tie switch then trips after a 0-second delay. 0.3S closing: When the power-depleted incoming line cabinet is re-energized, the connecting cabinet does not automatically trip. The operator must manually trip the connecting cabinet and then manually close the incoming line cabinet. Automatic transfer and automatic reset: When the transfer switch 10 is in standby automatic transfer mode, the microcomputer interlocks and unlocks the standby automatic transfer. After both incoming line cabinets are energized and closed, if either incoming line cabinet loses voltage, the de-energized incoming line cabinet trips after a 5-second delay, and the connecting cabinet closes after a 0.3-second delay. When the de-energized incoming line cabinet is re-energized, the connecting cabinet automatically trips after a 5-second delay. The incoming line cabinet has a 0.3-second delay before closing, and the set time can be adjusted according to actual needs. This low-voltage switchgear adopts a modular design and plug-in assembly, with dual power supply outputs. The low-voltage outgoing line cabinet has two outgoing lines, and each outgoing line is connected in parallel with two identical low-voltage molded case switches 13 for mutual backup. When one of the switches fails and needs to be repaired or replaced, the other switch can be manually closed to ensure uninterrupted power supply without affecting the repair or replacement of the faulty switch. The busbar channels are consistent, and the outgoing line contacts of the outgoing line drawer 12 are short-circuited in pairs.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel dual-power, multi-standby pluggable low-voltage switchgear, including a base (14), characterized in that: A bus tie cabinet (1) is installed in the middle of the top of the base (14). A first incoming line cabinet (2) is installed on one side of the top of the base (14). A second incoming line cabinet (3) is installed on the other side of the top of the base (14). Drawer-type circuit breakers (4) are installed in the middle of the bus tie cabinet (1), the middle of the first incoming line cabinet (2), and the middle of the second incoming line cabinet (3). A changeover switch (10) is installed on one side of the top front of the bus tie cabinet (1). An automatic transfer microcomputer (11) is installed on the other side of the top front of the bus tie cabinet (1). Two outgoing line drawers (12) are installed at the bottom of the first incoming line cabinet (2) and the bottom of the second incoming line cabinet (3). A molded case switch (13) is installed on the front of the outgoing line drawer (12).

2. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Two horizontal busbar clamps (16) are installed on the top of the inner wall of the first incoming line cabinet (2) and the top of the inner wall of the second incoming line cabinet (3). Three reverse busbar clamps (17) are installed in the middle of the inner wall of the bus tie cabinet (1), the middle of the inner wall of the first incoming line cabinet (2), and the middle of the inner wall of the second incoming line cabinet (3).

3. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Universal wheels (15) are fixedly installed at both ends of the bottom of the base (14).

4. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Two knockout holes (5) are provided on one side of the top of the first incoming line cabinet (2) and one side of the top of the second incoming line cabinet (3).

5. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Side sealing plates (8) are installed on the side walls of the first incoming line cabinet (2) and the second incoming line cabinet (3).

6. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Lifting rings (9) are installed at both ends of the top of the bus connector cabinet (1), both ends of the top of the first incoming line cabinet (2), and both ends of the top of the second incoming line cabinet (3).

7. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Several first heat dissipation holes (6) are provided on one side of the top of the first incoming line cabinet (2) and one side of the top of the second incoming line cabinet (3).

8. The novel dual-power multi-standby pluggable low-voltage switchgear according to claim 1, characterized in that: Several second heat dissipation holes (7) are provided at the bottom of the front of the bus connector cabinet (1), the bottom of the front of the first incoming line cabinet (2), and the bottom of the front of the second incoming line cabinet (3).

Images