Control circuit of bus and branch isolation cabinet

Abstract

The utility model relates to a bus and branch isolation cabinet control circuit. A bus is connected to an air circuit breaker; the air circuit breaker is connected with a branching isolation control circuit; a monitoring relay is arranged in the air circuit breaker; a monitoring relay is connected to the branching isolation control circuit, and the bus-branching isolation state of the air circuit breaker is monitored and fed back; according to the utility model, the monitoring and feedback of the bus-branch isolation state of the air circuit breaker are realized, and the problems that in the existing bus-branch isolation cabinet control circuit, an isolation switch is generally adopted for isolation, but the isolation switch cannot be used as an automatic control operation component to monitor the air circuit breaker, and the size of the isolation switch is relatively large, so that the operation is inconvenient are solved. And installation is not convenient.

Description

Technical Field

[0001] The embodiment of the utility model relates to an isolation cabinet control circuit, in particular to a busbar isolation cabinet control circuit. Background Art

[0002] In the existing busbar isolation cabinet control circuit, an isolating switch is generally used for isolation. However, the isolating switch cannot be used as an automatic control operating component to monitor the air circuit breaker. In addition, the isolating switch is large in size and inconvenient to install. Utility Model Content

[0003] The embodiment of the present utility model aims to provide a busbar isolation cabinet control circuit for controlling an air circuit breaker through a monitoring relay.

[0004] In order to achieve the above objectives, the embodiment of the present utility model designs a busbar isolation cabinet control circuit, including:

[0005] busbar;

[0006] An air circuit breaker, the busbar being connected to the air circuit breaker;

[0007] A branch line isolation control circuit connected to the air circuit breaker;

[0008] A monitoring relay is provided in the air circuit breaker; the monitoring relay is connected to the branch line isolation control circuit to monitor and provide feedback on the busbar isolation status of the air circuit breaker.

[0009] Furthermore, in the control circuit of the busbar isolation cabinet of the present invention, the busbar is an AC380V / 220V incoming line system.

[0010] Furthermore, in the busbar isolation cabinet control circuit of the present invention, an energy storage circuit is provided in the air circuit breaker.

[0011] Furthermore, in the control circuit of the busbar-branch isolation cabinet of the present invention, the busbar is connected to the incoming line end of the air circuit breaker; and the outgoing line end of the air circuit breaker is connected to the branch line.

[0012] Furthermore, in the busbar isolation cabinet control circuit of the present utility model, the energy storage circuit further includes:

[0013] A first control power supply positive electrode;

[0014] a first circuit breaker, connecting the positive electrode of the first control power supply to the incoming line terminal of the first circuit breaker;

[0015] Energy storage switch, the outgoing terminal of the first circuit breaker is connected to the incoming terminal of the energy storage switch; the outgoing terminal of the energy storage switch is connected to the negative electrode of the first control power supply.

[0016] Furthermore, in the busbar isolation cabinet control circuit of the present utility model, the branch line isolation control circuit further includes:

[0017] The second control power supply positive electrode;

[0018] A second circuit breaker connects the positive electrode of the second control power supply to the incoming line terminal of the second circuit breaker;

[0019] A first monitoring relay coil, the outlet of the second circuit breaker is connected to the inlet of the first monitoring relay coil; the outlet of the first monitoring relay coil is connected to the inlet of the first normally closed contact of the air circuit breaker;

[0020] The outlet terminal of the first normally closed contact of the air circuit breaker is connected to the inlet terminal of the first actuating coil of the air circuit breaker; the outlet terminal of the first actuating coil of the air circuit breaker is connected to the negative electrode of the second control power supply;

[0021] The outgoing terminal of the second circuit breaker is connected to the incoming terminal of the first normally closed contact of the mother branch cabinet;

[0022] A transfer switch, wherein the outlet end of the first normally closed contact of the mother branch cabinet is connected to the first terminal and the third terminal of the transfer switch;

[0023] The second terminal of the transfer switch is connected to the incoming line terminal of the first normally closed contact of the air circuit breaker;

[0024] The fourth terminal of the transfer switch is connected to the incoming line terminal of the first normally open contact of the air circuit breaker;

[0025] The outlet terminal of the first normally open contact of the air circuit breaker is connected to the inlet terminal of the second actuating coil of the air circuit breaker; the outlet terminal of the second actuating coil of the air circuit breaker is connected to the negative electrode of the second control power supply;

[0026] a second monitoring relay coil, wherein the outgoing terminal of the second circuit breaker is connected to the incoming terminal of the second monitoring relay coil; and the outgoing terminal of the second monitoring relay coil is connected to the incoming terminal of the first normally open contact of the air circuit breaker;

[0027] The outgoing terminal of the second circuit breaker is connected to the incoming terminal of the second normally open contact of the air circuit breaker, the outgoing terminal of the second normally open contact of the air circuit breaker is connected to the incoming terminal of the red indicator light; the outgoing terminal of the red indicator light is connected to the negative electrode of the second control power supply;

[0028] The outgoing terminal of the second circuit breaker is connected to the incoming terminal of the second normally closed contact of the air circuit breaker, the outgoing terminal of the second normally closed contact of the air circuit breaker is connected to the incoming terminal of the green indicator light; the outgoing terminal of the green indicator light is connected to the negative electrode of the second control power supply;

[0029] The outgoing terminal of the second circuit breaker is respectively connected to the first monitoring relay power incoming terminal and the second monitoring relay power incoming terminal; the first monitoring relay power outgoing terminal and the second monitoring relay power outgoing terminal are connected to the negative electrode of the second control power supply.

[0030] Furthermore, in the busbar isolation cabinet control circuit of the present invention, the first monitoring relay and the second monitoring relay are JZ-7GY-S002XMC DC220V type monitoring relays.

[0031] Furthermore, in the busbar isolation cabinet control circuit of the present invention, the air circuit breaker is a 3WL series DC220V air circuit breaker.

[0032] Compared with the prior art, the implementation method of the present invention adopts a method of connecting a busbar to an air circuit breaker; connecting a branch line isolation control circuit to the air circuit breaker; arranging a monitoring relay in the air circuit breaker; connecting the monitoring relay to the branch line isolation control circuit to monitor and provide feedback on the busbar branch line isolation status of the air circuit breaker; realizing the monitoring and feedback on the busbar branch line isolation status of the air circuit breaker, and solving the technical problems that in the existing busbar branch line isolation cabinet control circuit, an isolating switch is generally used for isolation, but the isolating switch cannot be used as an automatic control operating component to perform monitoring operations on the air circuit breaker, and the isolating switch is large in size and inconvenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the main circuit of the utility model;

[0034] Figure 2 This is a schematic diagram of the energy storage circuit of the utility model;

[0035] Figure 3 This is a schematic diagram of the branch line isolation control circuit of the utility model. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be achieved.

[0037] The embodiment of the present utility model relates to a busbar isolation cabinet control circuit, such as Figure 1 、 Figure 2 、 Figure 3 Shown, including:

[0038] Busbars L11 to L13 and N1 provide power for the main circuit in the busbar isolation cabinet control circuit in this embodiment;

[0039] Busbars L11~L13 and N1 are connected to air circuit breaker 4QF; air circuit breaker 4QF is used to control the on and off of the main circuit;

[0040] Connect the branch line isolation control circuit to the air circuit breaker 4QF; the branch line isolation control circuit mainly realizes the monitoring and feedback of the busbar isolation status of the air circuit breaker 4QF;

[0041] Monitoring relays 4KA1-4KA2 are installed within air circuit breaker 4QF and connected to the busbar isolation control circuit to monitor and provide feedback on the busbar isolation status of air circuit breaker 4QF. This enables monitoring and feedback on the busbar isolation status of air circuit breaker 4QF, resolving the technical issues of existing busbar isolation cabinet control circuits, where isolating switches are typically used for isolation. However, isolating switches cannot function as automatic control components for monitoring air circuit breakers, and are bulky and inconvenient to install.

[0042] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, the busbars L11~L13 and N in this example are AC380V / 220V incoming line system.

[0043] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, an energy storage circuit is provided in the air circuit breaker 4QF.

[0044] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, busbars L11 to L13 and N are connected to the incoming end of the air circuit breaker 4QF; the outgoing end of the air circuit breaker 4QF is connected to branch lines L21 to L23 and N2.

[0045] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, the energy storage circuit also includes:

[0046] In this embodiment, the first control power supply positive electrode SM1+ serves as the first control power supply of the split-line isolation control circuit;

[0047] The positive electrode SM1+ of the first control power supply is connected to the incoming terminal of the first circuit breaker QF1; the first circuit breaker QF1 is used to control the positive electrode SM1+ of the first control power supply.

[0048] The outgoing line of the first circuit breaker QF1 is connected to the incoming line of the energy storage switch 4QF-1; the outgoing line of the energy storage switch 4QF-1 is connected to the negative terminal of the first control power supply SM1-. The energy storage switch 4QF-1 controls the air circuit breaker 4QF to store energy. After energy storage, the contacts of the air circuit breaker 4QF separate to store energy.

[0049] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, the branch line isolation control circuit also includes:

[0050] The second control power supply positive electrode SM2+ in this embodiment serves as the second control power supply SM2+ of the branch isolation control circuit;

[0051] The second control power supply positive electrode SM2+ is connected to the incoming terminal of the second circuit breaker QF3; the second circuit breaker QF3 is used to control the on and off of the second control power supply positive electrode SM2+.

[0052] The outgoing terminal of the second circuit breaker QF3 is connected to the incoming terminal of the first monitoring relay coil 4KA1; the outgoing terminal of the first monitoring relay coil 4KA1 is connected to the incoming terminal of the first normally closed contact 4QF-1 of the air circuit breaker;

[0053] The outgoing line end of the first normally closed contact 4QF-1 of the air circuit breaker is connected to the incoming line end of the first action coil 4QF1 of the air circuit breaker; the outgoing line end of the first action coil 4QF1 of the air circuit breaker is connected to the negative pole SM2- of the second control power supply; the first monitoring relay coil 4KA1 is used to realize the function of closing circuit monitoring.

[0054] The outgoing terminal of the second circuit breaker QF3 is connected to the incoming terminal of the first normally closed contact 3KA4 of the mother branch cabinet; in manual mode, if the first normally closed contact 3KA4 of the mother branch cabinet is disconnected, the air circuit breaker 4QF cannot be closed, and the first normally closed contact 3KA4 of the mother branch cabinet controls the closing of the air circuit breaker 4QF.

[0055] The outgoing line of the first normally closed contact 3KA4 of the motherboard is connected to the first and third terminals of the transfer switch SA2; the transfer switch SA2 is mainly used to switch the closing and opening of the switch;

[0056] The second terminal of the transfer switch SA2 is connected to the incoming line terminal of the first normally closed contact 4QF-1 of the air circuit breaker;

[0057] The fourth terminal of the transfer switch SA2 is connected to the incoming terminal of the first normally open contact 4QF-2 of the air circuit breaker;

[0058] The outgoing line end of the first normally open contact 4QF-2 of the air circuit breaker is connected to the incoming line end of the second operating coil 4QF2 of the air circuit breaker; the outgoing line end of the second operating coil 4QF2 of the air circuit breaker is connected to the negative electrode SM2- of the second control power supply;

[0059] The outgoing line end of the second circuit breaker QF3 is connected to the incoming line end of the second monitoring relay coil 4KA2; the outgoing line end of the second monitoring relay coil 4KA2 is connected to the incoming line end of the first normally open contact 4QF-2 of the air circuit breaker; the second monitoring relay coil 4KA2 realizes the function of monitoring the opening circuit of the air circuit breaker 4QF.

[0060] The outgoing terminal of the second circuit breaker QF3 is connected to the incoming terminal of the second normally open contact 4QF-3 of the air circuit breaker, and the outgoing terminal of the second normally open contact 4QF-3 of the air circuit breaker is connected to the incoming terminal of the red indicator light HR; the outgoing terminal of the red indicator light HR is connected to the negative electrode SM2- of the second control power supply;

[0061] The outgoing terminal of the second circuit breaker QF3 is connected to the incoming terminal of the second normally closed contact 4QF-4 of the air circuit breaker, and the outgoing terminal of the second normally closed contact 4QF-4 of the air circuit breaker is connected to the incoming terminal of the green indicator light HG; the outgoing terminal of the green indicator light HG is connected to the negative pole of the second control power supply; the red indicator light HR is used to indicate the closing state; the green indicator light HG is used to indicate the opening state.

[0062] The outgoing terminal of the second circuit breaker QF3 is respectively connected to the incoming terminal of the first monitoring relay power supply 4KA11 and the incoming terminal of the second monitoring relay power supply 4KA12; the outgoing terminal of the first monitoring relay power supply 4KA11 and the outgoing terminal of the second monitoring relay power supply 4KA12 are connected to the negative electrode SM2- of the second control power supply.

[0063] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, the first monitoring relay 4KA1 and the second monitoring relay 4KA2 are JZ-7GY-S002XMC DC220V type monitoring relays.

[0064] In order to achieve the above technical effects, in the busbar isolation cabinet control circuit of this embodiment, as shown in FIG. Figure 1 、 Figure 2 、 Figure 3 As shown, air circuit breaker 4QF is a 3WL series DC220V air circuit breaker.

[0065] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A busbar isolation cabinet control circuit, characterized in that: include: busbar; An air circuit breaker, the busbar being connected to the air circuit breaker; A branch line isolation control circuit connected to the air circuit breaker; A monitoring relay is provided in the air circuit breaker; the monitoring relay is connected to the branch line isolation control circuit to monitor and provide feedback on the busbar isolation status of the air circuit breaker.

2. The busbar isolation cabinet control circuit according to claim 1, characterized in that: The busbar is of AC380V / 220V incoming line system.

3. The busbar isolation cabinet control circuit according to claim 1, characterized in that: An energy storage circuit is provided in the air circuit breaker.

4. The busbar isolation cabinet control circuit according to claim 1, characterized in that: The busbar is connected to the incoming line terminal of the air circuit breaker; and the outgoing line terminal of the air circuit breaker is connected to the branch line.

5. The busbar isolation cabinet control circuit according to claim 3, characterized in that: The energy storage circuit further includes: A first control power supply positive electrode; a first circuit breaker, connecting the positive electrode of the first control power supply to the incoming line terminal of the first circuit breaker; Energy storage switch, the outgoing terminal of the first circuit breaker is connected to the incoming terminal of the energy storage switch; the outgoing terminal of the energy storage switch is connected to the negative electrode of the first control power supply.

6. The busbar isolation cabinet control circuit according to claim 1, characterized in that: The branch line isolation control circuit further includes: The second control power supply positive electrode; a second circuit breaker, connecting the positive electrode of the second control power supply to the incoming line terminal of the second circuit breaker; A first monitoring relay coil, the outlet of the second circuit breaker is connected to the inlet of the first monitoring relay coil; the outlet of the first monitoring relay coil is connected to the inlet of the first normally closed contact of the air circuit breaker; The outlet terminal of the first normally closed contact of the air circuit breaker is connected to the inlet terminal of the first actuating coil of the air circuit breaker; the outlet terminal of the first actuating coil of the air circuit breaker is connected to the negative electrode of the second control power supply; The outgoing terminal of the second circuit breaker is connected to the incoming terminal of the first normally closed contact of the mother branch cabinet; A transfer switch, wherein the outlet end of the first normally closed contact of the mother branch cabinet is connected to the first terminal and the third terminal of the transfer switch; The second terminal of the transfer switch is connected to the incoming line terminal of the first normally closed contact of the air circuit breaker; The fourth terminal of the transfer switch is connected to the incoming line terminal of the first normally open contact of the air circuit breaker; The outlet terminal of the first normally open contact of the air circuit breaker is connected to the inlet terminal of the second actuating coil of the air circuit breaker; the outlet terminal of the second actuating coil of the air circuit breaker is connected to the negative electrode of the second control power supply; a second monitoring relay coil, wherein the outgoing terminal of the second circuit breaker is connected to the incoming terminal of the second monitoring relay coil; and the outgoing terminal of the second monitoring relay coil is connected to the incoming terminal of the first normally open contact of the air circuit breaker; The outgoing terminal of the second circuit breaker is connected to the incoming terminal of the second normally open contact of the air circuit breaker, the outgoing terminal of the second normally open contact of the air circuit breaker is connected to the incoming terminal of the red indicator light; the outgoing terminal of the red indicator light is connected to the negative electrode of the second control power supply; The outgoing terminal of the second circuit breaker is connected to the incoming terminal of the second normally closed contact of the air circuit breaker, the outgoing terminal of the second normally closed contact of the air circuit breaker is connected to the incoming terminal of the green indicator light; the outgoing terminal of the green indicator light is connected to the negative electrode of the second control power supply; The outgoing terminal of the second circuit breaker is respectively connected to the first monitoring relay power incoming terminal and the second monitoring relay power incoming terminal; the first monitoring relay power outgoing terminal and the second monitoring relay power outgoing terminal are connected to the negative electrode of the second control power supply.

7. The busbar isolation cabinet control circuit according to claim 6, characterized in that: The first monitoring relay and the second monitoring relay are JZ-7GY-S002XMC DC220V monitoring relays.

8. The busbar isolation cabinet control circuit according to claim 6, characterized in that: The air circuit breaker is a 3WL series DC220V air circuit breaker.

Images