Core unit of power distribution cabinet

Abstract

The utility model discloses a core unit of a power distribution cabinet, which is provided with a plurality of groups of switch assemblies connected in parallel, each switch assembly comprises a plurality of groups of load switches, and each load switch is provided with an upper contact seat assembly, a first lower contact seat assembly and a first grounding contact seat assembly; a plurality of first upper static contact seats are arranged on the upper contact seat assembly, a plurality of first lower static contact seats are arranged on the first lower contact seat assembly, first movable contact rods are hinged to the first lower static contact seats, a plurality of first grounding contact seats are arranged on the first grounding contact seat assembly, and the plurality of first grounding contact seats are mutually independent and are not communicated with one another; each first lower static contact seat is connected to the first sleeve through a first bus, and each first grounding contact seat is connected to the second sleeve through a second bus. According to the utility model, each grounding contact seat in the load switch is grounded independently and is connected to the front side of the core unit through the test bus, so that the grounding of the contact seats can be realized conveniently, and the detection of the loop resistance and the loop current of the single-phase loop main bus can be realized at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment technical field especially a core unit of switch board. BACKGROUND

[0002] The switch board is widely used in the power distribution station and box type substation of load center of city residential area, high -rise building, large -scale public building, factory enterprise etc.

[0003] The core unit of switch board is usually provided with load switch and circuit breaker switch, and the existing core unit cabinet cannot detect the loop current and resistance of the main bus in the switch after sealing. UTILITY MODEL CONTENTS

[0004] The applicant provides a core unit of switch board with reasonable structure for the shortcomings of the existing core unit of switch board, the grounding contact seat of the load switch is separately grounded and extended to the front side of the core unit, and the loop resistance and loop current of the single-phase loop after sealing of the core unit cabinet can be detected.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A core unit of switch board is provided with a plurality of parallel switch assemblies, the switch assembly comprises a plurality of load switches, the load switch is provided with an upper contact seat assembly, a first lower contact seat assembly and a first grounding contact seat assembly; the upper contact seat assembly is provided with a plurality of first upper static contact seats, the first lower contact seat assembly is provided with a plurality of first lower static contact seats, the first lower static contact seat is hingedly connected with a first movable contact rod, the first grounding contact seat assembly is provided with a plurality of first grounding contact seats, the plurality of first grounding contact seats are independent and not communicated with each other; each first lower static contact seat is connected to a first sleeve through a first bus, and each first grounding contact seat is connected to a second sleeve through a second bus.

[0007] As a further improvement of the above technical scheme:

[0008] The plurality of first grounding contact seats are connected to an insulating plate, and the first grounding contact seat is provided with a contact head and a connecting part.

[0009] The first grounding contact seat is an "η" shaped piece, the short plate part is the contact head, and the long plate part is the connecting part; the upper part of the connecting part is connected to the insulating plate, the first bus is connected to the lower part of the connecting part, and the lower part of the connecting part extends downward from the bottom side of the insulating plate.

[0010] The plurality of first movable contact rods are inserted into the first main shaft, and the driving end of the first main shaft is connected with a driving mechanism; the first upper static contact seat is connected with an arc extinguishing grid assembly.

[0011] The switch assembly further comprises a plurality of circuit breaker switches, and the load switch and the circuit breaker switch are connected through a connecting copper bar.

[0012] The circuit breaker switch is provided with a circuit breaker assembly, a second lower contact seat assembly and a second grounding contact seat assembly.

[0013] The plurality of second movable contact rods are inserted into the second main shaft, and the driving end of the second main shaft is connected with the driving mechanism.

[0014] The plurality of vacuum arc-extinguishing assemblies of the circuit breaker assembly are arranged between the clamping plates, and the vacuum arc-extinguishing assemblies are fixedly connected to the clamping plates.

[0015] The plurality of second grounding contact seats of the second grounding contact seat assembly are connected to the metal plate.

[0016] The core unit is provided with two groups of load switches and one group of circuit breaker switches.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model discloses a load switch and a circuit breaker switch, and each grounding contact seat in the load switch is separately grounded and not communicated with each other.

[0019] The movable contact rods of the load switch and the circuit breaker switch are respectively driven through the main shaft, so that the stability and reliability of transmission are improved. DRAWINGS

[0020] Figure 1 The structure schematic view of the utility model is shown, and the load switch and the circuit breaker switch are both in the open state.

[0021] Figure 2 The wiring schematic view of the load switch is shown, and the load switch is in the grounding state.

[0022] Figure 3 The structure diagram of the load switch, and the load switch is in the closed state.

[0023] Figure 4 The structure diagram of the ground contact of the load switch.

[0024] Figure 5 The structure diagram of the circuit breaker switch.

[0025] In the figure:

[0026] 1, load switch; 11, first partition plate; 12, upper contact seat assembly; 121, first upper static contact seat; 13, first lower contact seat assembly; 131, first lower static contact seat; 14, first ground contact seat assembly; 141, insulating plate; 142, first ground contact seat; 1421, contact head; 1422, connecting part; 15, first movable contact rod; 16, first main shaft; 17, arc extinguishing grid assembly;

[0027] 2, circuit breaker switch; 21, second partition plate; 22, circuit breaker assembly; 221, clamping plate; 222, vacuum arc extinguishing assembly; 223, hexagonal shaft; 224, second upper static contact seat; 225, flexible connection; 23, second lower contact seat assembly; 231, second lower static contact seat; 24, second ground contact seat assembly; 241, metal plate; 242, second ground contact seat; 25, second movable contact rod; 26, second main shaft;

[0028] 3, connecting copper bar; 4, first bus; 5, first sleeve; 6, second bus; 7, second sleeve; 8, third bus; 9, third sleeve. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model will be described below in combination with the drawings.

[0030] As shown in the figure, Figure 1 The core unit of the power distribution cabinet sets several groups of parallel switch assemblies, and the switch assembly includes several groups of load switches 1 and several groups of circuit breaker switches 2. In this embodiment, the core unit sets two groups of load switches 1 and one group of circuit breaker switches 2, and the two groups of load switches 1 are arranged on the opposite sides of the circuit breaker switch 2. The load switch 1 and the circuit breaker switch 2 are connected through the connecting copper bar 3, and the connecting copper bar 3 is a copper plate.

[0031] As shown in the figure, Figure 3As shown, the load switch 1 is provided with two vertical first partitions 11 as support members, and an upper contact seat assembly 12, a first lower contact seat assembly 13 and a first grounding contact seat assembly 14 are arranged between the two first partitions 11. The upper contact seat assembly 12 is provided with a plurality of first upper static contact seats 121, each of which is connected with an arc extinguishing grid assembly 17, and the connecting copper bar 3 is connected to the first upper static contact seat 121. The first lower contact seat assembly 13 is provided with a plurality of first lower static contact seats 131, each of which is hingedly connected with a first movable contact rod 15. As shown, Figure 3 、 Figure 4 As shown, the first grounding contact seat assembly 14 is provided with a plurality of first grounding contact seats 142, and the plurality of first grounding contact seats 142 are connected to the insulating plate 141, each of which is independent and not communicated with each other. As shown, Figure 4 The first grounding contact seat 142 is an "η" shaped member, the short plate part is a contact 1421, and the long plate part is a connecting part 1422. The upper part of the connecting part 1422 is connected to the insulating plate 141, and the lower part of the connecting part 1422 is used for connecting the connecting member of the first bus 4. The lower part of the connecting part 1422 extends downward from the bottom side of the insulating plate 141, which is convenient for the connection of the second bus 6. The first upper static contact seat 121, the first movable contact rod 15 and the first grounding contact seat 142 correspond to each other to form a switch group. The first movable contact rod 15 swings around the hinge point to realize the operations of opening, closing (connecting with the first upper static contact seat 121) and grounding (connecting with the first grounding contact seat 142). A plurality of groups of first movable contact rods 15 are inserted on the first main shaft 16, and the two ends of the first main shaft 16 are rotatably connected to the first partition 11. One end of the first main shaft 16 is a driving end and is connected with a driving mechanism. The first main shaft 16 is driven by the driving mechanism to drive the first movable contact rod 15 to swing and switch between opening, closing and grounding. The first movable contact rod 15 is driven by the first main shaft 16, which improves the stability and reliability of transmission. As shown, Figure 1 、 Figure 2 As shown, each first lower static contact seat 131 of the load switch 1 is connected to the corresponding first sleeve 5 through the first bus 4, and each first grounding contact seat 142 is connected to the corresponding second sleeve 7 through the second bus 6. Since each first grounding contact seat 142 is independent, when the first movable contact rod 15 hits the grounding position (as shown in Figure 2 ), each phase of the load switch 1 is independently grounded, that is, each first sleeve 5→ first bus 4→ first lower static contact seat 131→ first movable contact rod 15→ first grounding contact seat 142→ second bus 6→ second sleeve 7 of each path forms an independent one-way loop. By connecting a detection device to the single-phase corresponding second sleeve 7, the loop resistance and loop current of the single-phase loop can be detected.

[0032] As shown, Figure 5As shown, the circuit breaker switch 2 is provided with two vertical second partitions 21 as supports, and a circuit breaker assembly 22, a second lower contact seat assembly 23 and a second grounding contact seat assembly 24 are arranged between the two second partitions 21. The circuit breaker assembly 22 is provided with two vertical clamping plates 221, the two ends of the clamping plates 221 are fixedly connected to the second partitions 21, and a plurality of vacuum arc-extinguishing assemblies 222 are arranged between the two clamping plates 221, the vacuum arc-extinguishing assemblies 222 are fixedly connected to the clamping plates 221 through fixing members; the top end of each vacuum arc-extinguishing assembly 222 is provided with a hexagonal shaft 223, and the bottom end of each vacuum arc-extinguishing assembly 222 is provided with a second upper static contact seat 224; each vacuum arc-extinguishing assembly 222 is provided with a flexible connection 225, the two ends of the flexible connection 225 are respectively arranged to pass through the clamping plates 221 and connected to the connecting copper bar 3. The second lower contact seat assembly 23 is provided with a plurality of second lower static contact seats 231, and each second lower static contact seat 231 is hingedly connected with a second movable contact rod 25; the second grounding contact seat assembly 24 is provided with a plurality of second grounding contact seats 242, and the second upper static contact seat 224, the second movable contact rod 25 and the second grounding contact seat 242 one-to-one correspond to constitute a switch group, and the second movable contact rod 25 swings around the hinged point to realize the operations of opening, closing (connected with the second upper static contact seat 224) and grounding (connected with the second grounding contact seat 242). A plurality of second movable contact rods 25 are inserted on the second main shaft 26, and the two ends of the second main shaft 26 are rotatably connected to the second partitions 21, one end of the second main shaft 26 is a driving end and is connected with a driving mechanism, the second main shaft 26 is driven by the driving mechanism to drive the second movable contact rod 25 to swing and switch between opening, closing and grounding; the second movable contact rod 25 is driven by the second main shaft 26, so that the stability and reliability of transmission are improved. The second grounding contact seats 242 of the second grounding contact seat assembly 24 are connected to a metal plate 241, and each second grounding contact seat 242 is in communication with each other. Figure 1 As shown, each second lower static contact seat 231 of the circuit breaker switch 2 is connected to a corresponding third bushing 9 through a third bus 8, and the metal plate 241 of the second grounding contact seat assembly 24 is connected to a corresponding bushing at the two ends through a bus (not shown in the figure).

[0033] The above description is an explanation of the utility model, not a limitation of the utility model, and the utility model can be modified in any form without departing from the spirit of the utility model.

Claims

1. A core unit of a power distribution cabinet, provided with several groups of parallel switch assemblies, the switch assembly comprising several groups of load switches (1), characterized in that: The load switch (1) is provided with an upper contact seat assembly (12), a first lower contact seat assembly (13), and a first grounding contact seat assembly (14). The upper contact seat assembly (12) is provided with a plurality of first upper static contact seats (121). The first lower contact seat assembly (13) is provided with a plurality of first lower static contact seats (131). The first lower static contact seats (131) are hingedly connected with first movable contact rods (15). The first grounding contact seat assembly (14) is provided with a plurality of first grounding contact seats (142). The plurality of first grounding contact seats (142) are independent and not connected with each other. Each first lower static contact seat (131) is connected to a first bushing (5) through a first bus (4). Each first grounding contact seat (142) is connected to a second bushing (7) through a second bus (6).

2. The core unit of the switchgear cabinet according to claim 1, characterized in that: The plurality of first grounding contact seats (142) are connected to an insulating plate (141). The first grounding contact seat (142) is provided with a contact (1421) and a connecting portion (1422).

3. The core unit of the switchgear cabinet according to claim 1, characterized in that: The first grounding contact seat (142) is an "η" shaped piece. The short plate portion is the contact (1421), and the long plate portion is the connecting portion (1422). The upper portion of the connecting portion (1422) is connected to the insulating plate (141). The first bus (4) is connected to the lower portion of the connecting portion (1422). The lower portion of the connecting portion (1422) extends downward from the bottom side of the insulating plate (141).

4. The core unit of the switchgear cabinet according to claim 1, characterized in that: The plurality of groups of first movable contact rods (15) are inserted into a first main shaft (16). The driving end of the first main shaft (16) is connected with a driving mechanism. The first upper static contact seat (121) is connected with an arc extinguishing grid assembly (17).

5. The core unit of the switchgear cabinet according to claim 1, characterized in that: The switch assembly further comprises a plurality of groups of circuit breaker switches (2). The load switch (1) and the circuit breaker switch (2) are connected through a connecting copper bar (3). The connecting copper bar (3) is connected to the first upper static contact seat (121) of the load switch (1).

6. A core unit for an electrical switchgear cabinet according to claim 5, characterized in that: The circuit breaker switch (2) is provided with a circuit breaker assembly (22), a second lower contact seat assembly (23), and a second grounding contact seat assembly (24). The circuit breaker assembly (22) is provided with a plurality of vacuum arc extinguishing assemblies (222). The vacuum arc extinguishing assembly (222) is provided with a second upper static contact seat (224). The second lower contact seat assembly (23) is provided with a plurality of second lower static contact seats (231). Each second lower static contact seat (231) is hingedly connected with a second movable contact rod (25). The second grounding contact seat assembly (24) is provided with a plurality of second grounding contact seats (242).

7. A core unit for an electrical switchgear cabinet according to claim 6, characterized in that: The plurality of groups of second movable contact rods (25) are inserted into a second main shaft (26). The driving end of the second main shaft (26) is connected with a driving mechanism.

8. A core unit for an electrical switchgear cabinet according to claim 6, characterized in that: The plurality of vacuum arc extinguishing assemblies (222) of the circuit breaker assembly (22) are arranged between clamping plates (221). The vacuum arc extinguishing assembly (222) is fixedly connected to the clamping plate (221). The top end of the plurality of vacuum arc extinguishing assemblies (222) is provided with a hexagonal shaft (223). Each vacuum arc extinguishing assembly (222) is provided with a flexible connection (225). The two ends of the flexible connection (225) are respectively inserted out of the clamping plate (221) and connected with the connecting copper bar (3).

9. The core unit of the switchgear cabinet according to claim 6, characterized in that: A plurality of second grounding contact seats (242) of the second grounding contact seat assembly (24) are connected to the metal plate (241); each second lower static contact seat (231) of the circuit breaker switch (2) is connected to the third bushing (9) through the third bus bar (8) respectively, and the metal plate (241) is connected to the output terminal through the bus bar at both ends respectively.

10. The core unit of an electrical switchgear cabinet according to claim 1, characterized in that: The core unit is provided with two groups of load switches (1) and one group of circuit breaker switches (2), the two groups of load switches (1) are arranged on opposite sides of the circuit breaker switch (2), and the load switch (1) and the circuit breaker switch (2) are connected through the connecting copper bar (3); the load switch (1) is provided with the first partition plate (11) as a support, and the circuit breaker switch (2) is provided with the second partition plate (21) as a support.

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