CN218975374U - Low-voltage circuit breaker interlocking control circuit - Google Patents
Low-voltage circuit breaker interlocking control circuit Download PDFInfo
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- CN218975374U CN218975374U CN202223311799.5U CN202223311799U CN218975374U CN 218975374 U CN218975374 U CN 218975374U CN 202223311799 U CN202223311799 U CN 202223311799U CN 218975374 U CN218975374 U CN 218975374U
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Abstract
The utility model provides an interlocking control circuit of a low-voltage circuit breaker, which comprises a change-over switch SA1, a circuit breaker group, a relay group and a control power supply, wherein the change-over switch SA1 is connected with the relay group; the transfer switch SA1 is respectively connected with the relay group, the breaker group and the control power supply, and the relay group is respectively connected with the breaker group and the control power supply; the change-over switch SA1 comprises a contact group and a manual switch group; the relay group comprises a first relay KA1 and a second relay KA2, wherein the first relay KA1 is provided with a first normally open contact, a second normally open contact, a normally closed contact and a starting coil, and the second relay KA2 is provided with a normally open contact, a normally closed contact and a starting coil. The utility model has the functions of entering a manual control loop state, executing brake release and locking the brake release position after the brake release is operated; after the opening action, the opening locking is released through the button or the node action; the manual control loop is disconnected, the circuit is reset, namely when the change-over switch is not in a manual state, the relay is completely powered off, and the beneficial effects of manual switching-off and locking functions are relieved.
Description
Technical Field
The utility model belongs to the field of automatic transfer switch control systems, and particularly relates to an interlocking control circuit of a low-voltage circuit breaker.
Background
The control system operation mode of the automatic transfer switch comprises automatic-switching electric interlocking control and manual-electric control, in the prior art, two incoming lines are connected with a bus-bar circuit breaker to be switched off remotely through a button or a node connected to a coil, the circuit breaker is in a switching-on state, an electric control loop is normal, when the circuit breaker is switched off under manual-electric control, an output instantaneous control voltage is applied to a switching-off coil, the circuit breaker is switched off, the control voltage locked by switching-off is removed, and the switching-off state locking of the circuit breaker cannot be realized.
Therefore, an interlocking control circuit of the low-voltage circuit breaker needs to be designed, when the circuit breaker is in a closed state, an electric control loop is normal, a manual and electric control circuit breaker opening command is input, the control voltage of a continuous opening coil is automatically output, the circuit breaker is opened, the locking of the circuit breaker opening state is completed, a manual closing command is executed, the circuit breaker does not act, cannot close, the closing command is withdrawn or released, then the opening command is withdrawn or released, the manual closing command is executed, the circuit breaker outputs the closing action, and the closing is completed, so that the power supply reliability is improved.
Disclosure of Invention
In view of the above, the present utility model is directed to provide an interlock control circuit for a low-voltage circuit breaker, so as to solve the technical problem that the opening state of the circuit breaker cannot be locked when the circuit breaker is manually and electrically controlled to open.
In a first aspect, an embodiment of the present utility model provides a low voltage circuit breaker interlock control circuit, including: a change-over switch SA1, a breaker group, a relay group and a control power supply;
the change-over switch SA1 is respectively connected with the relay group, the breaker group and the control power supply, and the relay group is respectively connected with the breaker group and the control power supply;
the change-over switch SA1 comprises a contact group and a manual switch group;
the contact set comprises a first contact set, a second contact set, a third contact set, a fourth contact set and a fifth contact set;
the manual switch group comprises a manual switch SF, a manual switch SS1 and a manual switch SS2, wherein the manual switch SS1 and the manual switch SS2 are respectively used for controlling a switching-off input command and a switching-off release command;
the breaker group comprises a first low-voltage breaker QF1, a second low-voltage breaker QF2 and a third low-voltage breaker QF3, wherein the first low-voltage breaker QF1 and the second low-voltage breaker QF2 are respectively provided with an opening and closing auxiliary contact OF1, and the third low-voltage breaker QF3 is provided with a closing coil XF and an opening coil MX;
the relay group comprises a first relay KA1 and a second relay KA2, wherein the first relay KA1 is provided with a first normally open contact, a second normally open contact, a normally closed contact and a starting coil, and the second relay KA2 is provided with a normally open contact, a normally closed contact and a starting coil;
the first contact set, the manual switch SF, the breaker set and the fourth contact set are sequentially connected between the control power supplies to form a manual closing loop;
the second contact set, the first normally open contact of the first relay KA1, the breaker set and the fifth contact set are sequentially connected between the control power supplies to form a manual brake separating loop;
the third contact set, the relay set, the manual switch SS1 and the manual switch SS2 are connected between the control power supplies to form a switching-off command control loop.
Further, one end OF a switching auxiliary contact OF1 OF the first low-voltage breaker QF1 and one end OF a switching auxiliary contact OF1 OF the second low-voltage breaker QF2 are respectively connected with the manual switch SF, the other end OF the switching auxiliary contact OF1 OF the first low-voltage breaker QF1 and the other end OF the switching auxiliary contact OF1 OF the second low-voltage breaker QF2 are respectively connected with one end OF a closing coil XF OF a third low-voltage breaker QF3, and the other end OF the closing coil XF OF the third low-voltage breaker QF3 is connected with one end OF a fourth contact group;
one end of a brake separating coil MX of the third low-voltage circuit breaker QF3 is connected with a first normally open contact of the first relay KA1, and the other end of the brake separating coil MX of the third low-voltage circuit breaker QF3 is connected with a fifth contact set.
Further, the starting coil of the first relay KA1 is connected with one end of the manual switch SS1 and one end of a normally-closed contact of the second relay KA2 respectively, the other end of the normally-closed contact of the second relay KA2 is connected with one end of a second normally-open contact of the first relay KA1, and the other end of the manual switch SS1 and the other end of the second normally-open contact of the first relay KA1 are connected with the third contact set respectively;
the starting coil of the second relay KA2 is connected with one end of the manual switch SS2 and one end of a normally-closed contact of the first relay KA1 respectively, the other end of the normally-closed contact of the first relay KA1 is connected with one end of a normally-open contact of the second relay KA2, and the other ends of the manual switch SS2 and the normally-open contact of the second relay KA2 are connected with the third contact set respectively.
The embodiment of the utility model has the following beneficial effects:
1. entering a manual control loop state, executing brake release, and after the brake release is operated, having a brake release position locking function;
2. after the opening action, the opening locking is released through the button or the node action;
3. the manual control loop is disconnected, the circuit is reset, namely when the change-over switch is not in a manual state, the relay is completely powered off, and the manual brake-separating and locking functions are released.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a diagram of a low voltage circuit breaker interlock control circuit provided by an embodiment of the present utility model;
fig. 2 is a control circuit diagram of a low voltage circuit breaker according to the prior art.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
For the convenience of understanding the present embodiment, first, a detailed description will be given of a low-voltage circuit breaker interlock control circuit disclosed in the embodiment of the present utility model, as shown in fig. 1, including: a change-over switch SA1, a breaker group, a relay group and a control power supply;
the change-over switch SA1 is respectively connected with the relay group, the breaker group and the control power supply, and the relay group is respectively connected with the breaker group and the control power supply;
the change-over switch SA1 comprises a contact group and a manual switch group;
the contact set comprises a first contact set, a second contact set, a third contact set, a fourth contact set and a fifth contact set;
the manual switch group comprises a manual switch SF, a manual switch SS1 and a manual switch SS2, wherein the manual switch SS1 and the manual switch SS2 are respectively used for controlling a switching-off input command and a switching-off release command;
the breaker group comprises a first low-voltage breaker QF1, a second low-voltage breaker QF2 and a third low-voltage breaker QF3, wherein the first low-voltage breaker QF1 and the second low-voltage breaker QF2 are respectively provided with an opening and closing auxiliary contact OF1, and the third low-voltage breaker QF3 is provided with a closing coil XF and an opening coil MX;
the relay group comprises a first relay KA1 and a second relay KA2, wherein the first relay KA1 is provided with a first normally open contact, a second normally open contact, a normally closed contact and a starting coil, and the second relay KA2 is provided with a normally open contact, a normally closed contact and a starting coil;
the first contact set, the manual switch SF, the breaker set and the fourth contact set are sequentially connected between the control power supplies to form a manual closing loop;
the second contact set, the first normally open contact of the first relay KA1, the breaker set and the fifth contact set are sequentially connected between the control power supplies to form a manual brake separating loop;
the third contact set, the relay set, the manual switch SS1 and the manual switch SS2 are connected between the control power supplies to form a switching-off command control loop.
Further, one end OF a switching auxiliary contact OF1 OF the first low-voltage breaker QF1 and one end OF a switching auxiliary contact OF1 OF the second low-voltage breaker QF2 are respectively connected with the manual switch SF, the other end OF the switching auxiliary contact OF1 OF the first low-voltage breaker QF1 and the other end OF the switching auxiliary contact OF1 OF the second low-voltage breaker QF2 are respectively connected with one end OF a closing coil XF OF a third low-voltage breaker QF3, and the other end OF the closing coil XF OF the third low-voltage breaker QF3 is connected with one end OF a fourth contact group;
one end of a brake separating coil MX of the third low-voltage circuit breaker QF3 is connected with a first normally open contact of the first relay KA1, and the other end of the brake separating coil MX of the third low-voltage circuit breaker QF3 is connected with a fifth contact set.
Further, the starting coil of the first relay KA1 is connected with one end of the manual switch SS1 and one end of a normally-closed contact of the second relay KA2 respectively, the other end of the normally-closed contact of the second relay KA2 is connected with one end of a second normally-open contact of the first relay KA1, and the other end of the manual switch SS1 and the other end of the second normally-open contact of the first relay KA1 are connected with the third contact set respectively;
the starting coil of the second relay KA2 is connected with one end of the manual switch SS2 and one end of a normally-closed contact of the first relay KA1 respectively, the other end of the normally-closed contact of the first relay KA1 is connected with one end of a normally-open contact of the second relay KA2, and the other ends of the manual switch SS2 and the normally-open contact of the second relay KA2 are connected with the third contact set respectively.
In the embodiment, KML and KMN are led from an external reliable control power supply, ac voltage is 220V, SF, SS1 and SS2 OF a manual switch group are buttons without self-locking function, SA1 is a change-over switch provided with a plurality OF groups OF auxiliary contacts, KA1 and KA2 are respectively a first relay and a second relay, QF1, QF2 and QF3 are respectively a schrader first low-voltage circuit breaker, a second low-voltage circuit breaker and a third low-voltage circuit breaker, XF is a circuit breaker closing coil, coil energization can perform circuit breaker closing, OF1 is a break-make auxiliary contact OF the circuit breaker, closing is performed when opening and opening; MX is a standard breaking coil of the breaker, has a remote tripping function, and can lock the breaking position of the breaker when the breaker is continuously electrified.
The contact numbers 1, 3 and 5 of the change-over switch SA1 are connected to the KML, the contact numbers 8 and 10 are connected to the KMN, the contact number 4 is connected to one end of a first normally open contact of the first relay KA1, the other end of the first normally open contact is connected to one end of a brake separating coil MX, and the other end of the MX is connected to a contact number 9 of the SA 1; the contact number 2 is connected to one end of the manual switch SF, the other end of the manual switch SF is respectively connected to the first low-voltage breaker QF1 and the second low-voltage breaker QF2, and then is connected with one end of the breaker closing coil XF, and the other end of the breaker closing coil XF is connected to the contact number 7; the contact number 6 is connected to the manual switch SS1, the manual switch SS2, the second normally open contact of the first relay KA1, and the normally open contact of the second relay KA2, respectively.
In this embodiment, the working process is: the switching-on and switching-off of the manual switching-off control voltage is realized through a change-over switch, the normally open contact of the power relay is controlled to be connected with a switching-off loop in series, and the snap-action signal is converted into the holding signal through a button without a self-locking function connected with a relay coil in series.
The concrete steps are as follows: when the third low-voltage breaker QF3 is in a closing state, the change-over switch SA1 is turned to be manual, the contact numbers 3 and 4 are closed, the contact numbers 9 and 10 are closed, KML and KMN are applied to two ends of the opening coil MX when the first normally open contact of the first relay KA1 of the manual opening circuit is closed, the opening coil MX is electrified, the third low-voltage breaker QF3 performs opening action, the opening coil MX is continuously electrified when the first normally open contact of the first relay KA1 is kept closed, and the opening position is locked and cannot be closed; when the first normally open contact of the first relay KA1 is opened, the brake release coil MX is powered off, and the brake release lock is released.
The control process of the first normally open contact action of the first relay KA1 of the manual brake release loop mainly includes the input and removal of the control voltage of the brake release coil MX. The method comprises the following steps:
when the third low-voltage circuit breaker QF3 is in a closing state, the change-over switch SA1 is turned to be manual, the opening and closing input command buttons SS1 and SS1 are clicked to be closed, a starting coil of the first relay KA1 is electrified, two normally open contacts of the first relay KA1 are closed, and normally closed contacts of the first relay KA1 are opened; SS1 is disconnected, the starting coil of the first relay KA1 is kept energized, the two normally open contact states of the first relay KA1 are kept closed, the brake separating coil MX is continuously energized, and the brake separating position is locked.
Clicking the break release button SS2, SS2 is closed, the starting coil of the second relay KA2 is electrified, the normally open contact of the second relay KA2 is closed, the normally closed contact of the second relay KA2 is opened, the coil of the first relay KA1 is powered off, the two normally open contacts of the first relay KA1 are opened, the normally closed contact of the first relay KA1 is closed, the SS2 is opened, the normally open contact of the first relay KA1 is kept open, the break coil MX is powered off, and the break locking is released.
The resetting process is as follows: the manual circuit is disconnected by the change-over switch SA1, all the coils of the first relay KA1 and the second relay KA2 are powered off, all the contact states are reset, and the normally open contact of the first relay KA1 is disconnected, so that the state is maintained.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A low voltage circuit breaker interlock control circuit, comprising: a change-over switch SA1, a breaker group, a relay group and a control power supply;
the change-over switch SA1 is respectively connected with the relay group, the breaker group and the control power supply, and the relay group is respectively connected with the breaker group and the control power supply;
the change-over switch SA1 comprises a contact group and a manual switch group;
the contact set comprises a first contact set, a second contact set, a third contact set, a fourth contact set and a fifth contact set;
the manual switch group comprises a manual switch SF, a manual switch SS1 and a manual switch SS2, wherein the manual switch SS1 and the manual switch SS2 are respectively used for controlling a switching-off input command and a switching-off release command;
the breaker group comprises a first low-voltage breaker QF1, a second low-voltage breaker QF2 and a third low-voltage breaker QF3, wherein the first low-voltage breaker QF1 and the second low-voltage breaker QF2 are respectively provided with an opening and closing auxiliary contact OF1, and the third low-voltage breaker QF3 is provided with a closing coil XF and an opening coil MX;
the relay group comprises a first relay KA1 and a second relay KA2, wherein the first relay KA1 is provided with a first normally open contact, a second normally open contact, a normally closed contact and a starting coil, and the second relay KA2 is provided with a normally open contact, a normally closed contact and a starting coil;
the first contact set, the manual switch SF, the breaker set and the fourth contact set are sequentially connected between the control power supplies to form a manual closing loop;
the second contact set, the first normally open contact of the first relay KA1, the breaker set and the fifth contact set are sequentially connected between the control power supplies to form a manual brake separating loop;
the third contact set, the relay set, the manual switch SS1 and the manual switch SS2 are connected between the control power supplies to form a switching-off command control loop.
2. The interlock control circuit of claim 1 wherein,
one end OF a switching auxiliary contact OF1 OF the first low-voltage circuit breaker QF1 and one end OF a switching auxiliary contact OF1 OF the second low-voltage circuit breaker QF2 are respectively connected with a manual switch SF, the other ends OF the switching auxiliary contact OF1 OF the first low-voltage circuit breaker QF1 and the switching auxiliary contact OF1 OF the second low-voltage circuit breaker QF2 are respectively connected with one end OF a closing coil XF OF a third low-voltage circuit breaker QF3, and the other end OF the closing coil XF OF the third low-voltage circuit breaker QF3 is connected with one end OF a fourth contact group;
one end of a brake separating coil MX of the third low-voltage circuit breaker QF3 is connected with a first normally open contact of the first relay KA1, and the other end of the brake separating coil MX of the third low-voltage circuit breaker QF3 is connected with a fifth contact set.
3. The interlock control circuit of claim 1 wherein,
the starting coil of the first relay KA1 is respectively connected with one end of a manual switch SS1 and one end of a normally-closed contact of a second relay KA2, the other end of the normally-closed contact of the second relay KA2 is connected with one end of a second normally-open contact of the first relay KA1, and the other end of the manual switch SS1 and the other end of the second normally-open contact of the first relay KA1 are respectively connected with a third contact set;
the starting coil of the second relay KA2 is connected with one end of the manual switch SS2 and one end of a normally-closed contact of the first relay KA1 respectively, the other end of the normally-closed contact of the first relay KA1 is connected with one end of a normally-open contact of the second relay KA2, and the other ends of the manual switch SS2 and the normally-open contact of the second relay KA2 are connected with the third contact set respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223311799.5U CN218975374U (en) | 2022-12-09 | 2022-12-09 | Low-voltage circuit breaker interlocking control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223311799.5U CN218975374U (en) | 2022-12-09 | 2022-12-09 | Low-voltage circuit breaker interlocking control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218975374U true CN218975374U (en) | 2023-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223311799.5U Active CN218975374U (en) | 2022-12-09 | 2022-12-09 | Low-voltage circuit breaker interlocking control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218975374U (en) |
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2022
- 2022-12-09 CN CN202223311799.5U patent/CN218975374U/en active Active
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