CN212085441U - Circuit breaker control circuit in drawer type switch cabinet - Google Patents
Circuit breaker control circuit in drawer type switch cabinet Download PDFInfo
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- CN212085441U CN212085441U CN202020921796.5U CN202020921796U CN212085441U CN 212085441 U CN212085441 U CN 212085441U CN 202020921796 U CN202020921796 U CN 202020921796U CN 212085441 U CN212085441 U CN 212085441U
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- circuit breaker
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- breaker
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Abstract
The utility model discloses a circuit breaker control circuit in drawer type switch cabinet relates to cubical switchboard control field. On the basis of the existing loop, a normally open auxiliary contact of a circuit breaker is connected in series with a contactor coil, a test circuit is connected in parallel with the normally open auxiliary contact of the circuit breaker, and the test circuit is formed by connecting the normally closed auxiliary contact of the circuit breaker and a test position fuse in series. In the operation process, after the main circuit breaker trips due to faults, the normally open auxiliary contact of the breaker is immediately disconnected, the control circuit is cut off, the control circuit is consistent with the main circuit and the local equipment in motion state, the real-time monitoring of the actual operation state of the equipment is realized, and the reliability of a power supply system is greatly improved; the function of testing the transmission switch is reserved through the testing circuit. The scheme is economical, simple and convenient, the field operability is strong, and the old switch cabinet is convenient to reform.
Description
Technical Field
The utility model relates to a cubical switchboard control field, concretely relates to circuit breaker control circuit in drawer type switch cabinet.
Background
Fig. 1 shows a control circuit of a breaker in an early old switch cabinet, a 380V/220V switch panel cabinet control circuit power supply is taken from the incoming line side of the breaker in a drawer switch, when the switch circuit is driven in maintenance, the switch needs to be pushed in place, secondary plug-in components are in good contact, an operating handle is disconnected, namely, the breaker is opened, and after the transmission is normal, the operating handle switch is closed, so that the switch can be put into operation. However, in actual production operation, the design has a great potential safety hazard, when the breaker is tripped due to a fault in operation, a control loop power supply is taken from the incoming line side of the breaker, so that the control loop of the breaker is still electrified, the operation state is continuously maintained, but a main loop is disconnected, local equipment is not actually operated, the condition that the state of the control loop of the breaker is inconsistent with the state of the main loop exists, the actual operation state of the equipment cannot be monitored in real time, particularly for a power supply system, the inconsistency of the state easily causes misjudgment of the fault, serious influence is brought to the operation system, and the improvement on an old switch cabinet is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circuit breaker control circuit in drawer type cubical switchboard solves the inconsistent problem of circuit breaker control circuit and major loop state in the old cubical switchboard.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a circuit breaker control circuit in drawer type cubical switchboard which characterized in that: the circuit breaker comprises a main loop and a control loop, wherein the main loop is respectively electrically connected with the phase A, the phase B and the phase C wiring of a power distribution device and the wire inlet end of a local operation device; the control circuit is respectively connected with the A phase and the N phase of the power distribution device, the control circuit is formed by connecting a power supply fuse, a contactor normally-open auxiliary point, a main circuit opening contact, an opening button, a breaker normally-open auxiliary contact, a thermal relay normally-closed contact and a contactor coil in series in sequence, the main circuit closing contact is connected with the contactor normally-open auxiliary point in parallel, a test circuit is connected on the breaker normally-open auxiliary contact in parallel, the test circuit is formed by connecting the breaker normally-closed auxiliary contact and a test position fuse in series, the power supply fuse is electrically connected with the A phase of the power supply fuse, and the contactor coil is electrically connected with the.
A further aspect is that the in-situ operation device is an electric motor.
In a further technical scheme, a phase A connecting wire of the power distribution device is also connected with a current transformer in series.
The working principle is as follows:
closing a main loop: in fig. 2, a circuit breaker 1 is switched on, a normally open auxiliary contact 8 of the circuit breaker is closed, a normally closed auxiliary contact 12 of the circuit breaker is opened, a main circuit switching contact 11 is switched on and closed, a contactor coil 10 is electrified, a normally open main contact 2 of a contactor is closed, a normally open auxiliary contact 5 of the contactor is closed, a circuit is switched on and self-maintained, a main circuit is electrified, and equipment runs.
Main loop opening: in fig. 2, the main circuit opening contact 6 is disconnected (or the opening button 7 and the thermal relay normally-closed contact 9 are disconnected), the contactor coil 10 loses power, the contactor normally-open main contact 2 is disconnected, the contactor normally-open auxiliary point 5 is disconnected, the circuit is opened, the main circuit is powered off, and the equipment is stopped.
Tripping of a breaker: in the figure 2, the circuit breaker 1 is disconnected, the normally-open auxiliary contact 8 of the circuit breaker is disconnected, the contactor coil 10 loses power, the normally-open main contact 2 of the contactor is disconnected, the normally-open auxiliary contact 5 of the contactor is disconnected, a circuit is switched off, a main circuit has power failure, and equipment stops running.
Test site transmission: in fig. 2, a circuit breaker 1 is disconnected, a circuit breaker normally-open auxiliary contact 8 is disconnected, a circuit breaker normally-closed auxiliary contact 12 is closed, a manual on-test position fuse 13 is closed, a main circuit closing contact 11 is closed, a contactor coil 10 is electrified, a contactor normally-open main contact 2 is closed, a contactor normally-open auxiliary contact 5 is closed, a circuit is self-maintained, a control circuit is electrified, the main circuit is not electrified, and equipment does not operate. After the transmission of the test position is normal, the test position fuse 13 is manually disconnected, and the switch can be normally used.
Compared with the prior art, the beneficial effects of the utility model are that: in the operation process, after the main circuit breaker trips due to faults, the normally open auxiliary contact of the breaker is immediately disconnected, the control circuit is cut off, the control circuit is consistent with the main circuit and the local equipment in motion state, the real-time monitoring of the actual operation state of the equipment is realized, and the reliability of a power supply system is greatly improved; the function of testing the transmission switch is reserved through the testing circuit. Above-mentioned circuit breaker control circuit can realize through the auxiliary contact that normally opens at contactor coil series circuit breaker on current return circuit basis, and the scheme economy is simple and convenient, and on-the-spot maneuverability is strong, is convenient for reform transform old cubical switchboard.
Drawings
Fig. 1 shows the control loop of a circuit breaker in an earlier old switchgear.
Fig. 2 shows the circuit breaker control circuit in the drawer-type switch cabinet of the present invention.
In the figure: 1-a circuit breaker, 2-a contactor normally-open main contact, 3-a thermal relay, 4-a power fuse, 5-a contactor normally-open auxiliary point, 6-a main loop opening contact, 7-an opening button, 8-a circuit breaker normally-open auxiliary contact, 9-a thermal relay normally-closed contact, 10-a contactor coil, 11-a main loop closing contact, 12-a circuit breaker normally-closed auxiliary contact, 13-a test site fuse, 14-a current transformer and 15-a local operation device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 2 shows a circuit breaker control circuit in a drawer type switch cabinet, which comprises a main circuit and a control circuit, wherein the main circuit is respectively electrically connected with the wiring of the phase A, the phase B and the phase C of a power distribution device and the wire inlet end of a local operation device 15, the main circuit is composed of a circuit breaker 1, a contactor normally-open main contact 2 and a thermal relay 3 which are sequentially connected in series, the wire inlet side of the circuit breaker 1 is electrically connected with the wiring of the phase A, the phase B and the phase C, and the wire outlet side of the circuit breaker 1 is electrically connected with the contactor normally-open main contact 2.
The control circuit is respectively connected with the A phase and the N phase of the power distribution device, the control circuit is formed by sequentially connecting a power supply fuse 4, a contactor normally-open auxiliary point 5, a main circuit opening contact 6, an opening button 7, a breaker normally-open auxiliary contact 8, a thermal relay normally-closed contact 9 and a contactor coil 10 in series, a main circuit closing contact 11 is connected with the contactor normally-open auxiliary point 5 in parallel, a test circuit is connected on the breaker normally-open auxiliary contact 8 in parallel, the test circuit is formed by connecting a breaker normally-closed auxiliary contact 12 and a test position fuse 13 in series, the power supply fuse 4 is electrically connected with the A phase of the power supply, and the contactor coil 10 is electrically connected with the N phase.
The specific working flow of the circuit is as follows:
closing a main loop: in fig. 2, a circuit breaker 1 is switched on, a normally open auxiliary contact 8 of the circuit breaker is closed, a normally closed auxiliary contact 12 of the circuit breaker is opened, a main circuit switching contact 11 is switched on and closed, a contactor coil 10 is electrified, a normally open main contact 2 of a contactor is closed, a normally open auxiliary contact 5 of the contactor is closed, a circuit is switched on and self-maintained, a main circuit is electrified, and equipment runs.
Main loop opening: in fig. 2, the main circuit opening contact 6 is disconnected (or the opening button 7 and the thermal relay normally-closed contact 9 are disconnected), the contactor coil 10 loses power, the contactor normally-open main contact 2 is disconnected, the contactor normally-open auxiliary point 5 is disconnected, the circuit is opened, the main circuit is powered off, and the equipment is stopped.
Tripping of a breaker: in the figure 2, the circuit breaker 1 is disconnected, the normally-open auxiliary contact 8 of the circuit breaker is disconnected, the contactor coil 10 loses power, the normally-open main contact 2 of the contactor is disconnected, the normally-open auxiliary contact 5 of the contactor is disconnected, a circuit is switched off, a main circuit has power failure, and equipment stops running.
Test site transmission: in fig. 2, a circuit breaker 1 is disconnected, a circuit breaker normally-open auxiliary contact 8 is disconnected, a circuit breaker normally-closed auxiliary contact 12 is closed, a manual on-test position fuse 13 is closed, a main circuit closing contact 11 is closed, a contactor coil 10 is electrified, a contactor normally-open main contact 2 is closed, a contactor normally-open auxiliary contact 5 is closed, a circuit is self-maintained, a control circuit is electrified, the main circuit is not electrified, and equipment does not operate. After the transmission of the test position is normal, the test position fuse 13 is manually disconnected, and the switch can be normally used.
The in-situ operation device 15 is an electric motor.
And a current transformer 14 is also connected in series on the phase A connecting wire of the power distribution device. The current transformer 14 can monitor the current value of the main loop on the phase a in real time and transmit the current value back to the background of the monitoring system in real time, so that the current transformer is convenient for an operator to read and judge.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (3)
1. The utility model provides a circuit breaker control circuit in drawer type cubical switchboard which characterized in that: the intelligent on-site operation system comprises a main loop and a control loop, wherein the main loop is respectively electrically connected with the phase A, the phase B and the phase C of a power distribution device and the wire inlet end of on-site operation equipment (15), the main loop is composed of a circuit breaker (1), a contactor normally-open main contact (2) and a thermal relay (3) which are sequentially connected in series, the wire inlet side of the circuit breaker (1) is electrically connected with the phase A, the phase B and the phase C, and the wire outlet side of the circuit breaker (1) is electrically connected with the contactor normally-open main contact (2);
control circuit respectively with distribution device's A looks, N looks wiring electricity is connected, control circuit is in proper order by power fuse (4), contactor normally opens auxiliary point (5), main circuit separating brake contact (6), separating brake button (7), circuit breaker normally opens auxiliary contact (8), thermorelay normally closed contact (9), contactor coil (10) are established ties and are formed, main circuit combined floodgate contact (11) are connected in parallel with contactor normally opens auxiliary point (5), parallel connection has test circuit on circuit breaker normally opens auxiliary contact (8), test circuit is established ties by circuit breaker normally closed auxiliary contact (12) and test position insurance (13) and forms, wherein power fuse (4) are connected the electricity with A looks wiring, contactor coil (10) are connected the electricity with N looks wiring.
2. The draw-out switchgear cabinet-breaker control circuit as claimed in claim 1, wherein: the in-situ operation device (15) is an electric motor.
3. The draw-out switchgear cabinet-breaker control circuit as claimed in claim 1, wherein: and a phase A connecting wire of the power distribution device is also connected with a current transformer (14) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020921796.5U CN212085441U (en) | 2020-05-27 | 2020-05-27 | Circuit breaker control circuit in drawer type switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020921796.5U CN212085441U (en) | 2020-05-27 | 2020-05-27 | Circuit breaker control circuit in drawer type switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212085441U true CN212085441U (en) | 2020-12-04 |
Family
ID=73557111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020921796.5U Expired - Fee Related CN212085441U (en) | 2020-05-27 | 2020-05-27 | Circuit breaker control circuit in drawer type switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212085441U (en) |
-
2020
- 2020-05-27 CN CN202020921796.5U patent/CN212085441U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201204 Termination date: 20210527 |