CN202285347U - State detection circuit for main/standby execution switch of automatic change-over switch - Google Patents
State detection circuit for main/standby execution switch of automatic change-over switch Download PDFInfo
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- CN202285347U CN202285347U CN2011204085797U CN201120408579U CN202285347U CN 202285347 U CN202285347 U CN 202285347U CN 2011204085797 U CN2011204085797 U CN 2011204085797U CN 201120408579 U CN201120408579 U CN 201120408579U CN 202285347 U CN202285347 U CN 202285347U
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- power supply
- isolator
- automatic change
- switch
- detection circuit
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Abstract
The utility model discloses a state detection circuit for a main/standby switch of an automatic change-over switch. The state detection circuit comprises an auxiliary switch and an isolator; the auxiliary switch is linked with the main/standby execution switch, and is connected in series with the power supply return circuit of the isolator; and the isolator is a bidirectional isolator. By adopting the bidirectional isolator, the state detection circuit can use not only a DC power supply but also an AC power supply, and further utilizes a main/standby power supply to directly supply power, so as to save the cost of an auxiliary DC power supply, and enlarge the application range.
Description
Technical field
The utility model relates to a kind of testing circuit, relate in particular to a kind of automatic change-over normal/state detection circuit of subsequent use execution switch.
Background technology
Automatic change-over is mainly used in important power supply place, when one road power supply goes wrong and can not continue as the load equipment power supply and the time switch to another road power supply, thus the operate as normal of proof load equipment.At present, CB level automatic change-over breaker of plastic casing commonly used is as performer, and the state of the auxiliary contact reflection breaker of plastic casing that breaker of plastic casing is inner, automatic change-over are judged the closure state of current breaker of plastic casing according to detection auxiliary contact signal.(application number is 200620150054.7 to one piece of Chinese utility model patent; The applying date is 2006.11.29; Granted publication number is CN200979998Y; Granted publication day is 2007.11.21) a kind of " short trouble is not made the automatic change-over of conversion " disclosed; Warning node (promptly chain with circuit breaker auxiliary contact) through with circuit breaker is connected in series in the optocoupler current supply circuit of (perhaps being called optical coupling isolator, photoisolator), has constituted standing with the state detection circuit of carrying out switch.During use, the output of optocoupler is connected with the controller signals of automatic change-over, its circuit structure is as shown in Figure 1; Under power supply normal condition commonly used, automatic change-over is in "on" position commonly used, and is closed with the auxiliary contact of breaker of plastic casing connection commonly used; Excite optocoupler; Make its conducting work, send signal and send into microprocessor, microprocessor is in "on" position commonly used according to this signal with regard to knowing current automatic change-over.When using abnormity of power supply always, automatic change-over controlling and driving motor breaks off power supply commonly used, closed stand-by power supply, and subsequent use auxiliary contact signal is as the stopping signal of drive motors; In like manner, when power up commonly used just often, automatic change-over controlling and driving motor breaks off stand-by power supply, closed power supply commonly used, auxiliary contact signal commonly used is as the stopping signal of drive motors.If in the motor-driven process, do not detect commonly used or subsequent use auxiliary contact signal in the certain hour; Then automatic change-over is in malfunction; And no longer conversion, prevent not fix a breakdown and bring second short circuit with regard to switching to other one road power supply, avoid causing more major injury to system.But what adopt in this scheme is unidirectional optical coupling isolator, can only adopt the dc auxiliary supply power supply, has increased system cost, has limited range of application.
Summary of the invention
The utility model technical problem to be solved is to overcome the deficiency that the existing in prior technology cost is higher, range of application is narrower; Provide a kind of automatic change-over normal/state detection circuit of subsequent use execution switch; Can use direct current or AC power, have wideer range of application.
The automatic change-over of the utility model is normal/state detection circuit of subsequent use execution switch, comprise auxiliary switch and isolator; Auxiliary switch and said normal/subsequent use execution switch is chain, and serial connection goes in the current supply circuit of said isolator, said isolator is a bidirectional isolator.
Preferably, said bidirectional isolator is two-way optical coupling isolator.
Further, said bidirectional isolator is by the power supply commonly used or the stand-by power supply power supply of said automatic change-over control.
The utility model is through adopting bidirectional isolator; Thereby make automatic change-over normal/state detection circuit of subsequent use execution switch; Both DC power supply can be used, AC power can be used again, more can further use and standingly directly supply power with power supply; Avoid the required cost of use auxiliary DC power supply, expanded range of application.
Description of drawings
Fig. 1 be a kind of existing automatic change-over normal/circuit diagram of the state detection circuit of subsequent use execution switch;
Fig. 2 be the automatic change-over of the utility model normal/circuit diagram of the state detection circuit of subsequent use execution switch.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to the utility model:
An embodiment of the utility model is as shown in Figure 2, comprises isolator power supply 1, auxiliary switch 2, bidirectional isolator 3; Auxiliary switch 2 with normal/subsequent use execution switch is chain.Under power supply normal condition commonly used; Automatic change-over is in "on" position commonly used; Closed with the auxiliary contact of breaker of plastic casing connection commonly used, excite optocoupler, make its conducting work; Send signal and send into microprocessor, microprocessor is in "on" position commonly used according to this signal with regard to knowing current automatic change-over.When using abnormity of power supply always, automatic change-over controlling and driving motor breaks off power supply commonly used, closed stand-by power supply, and subsequent use auxiliary contact signal is as the stopping signal of drive motors; In like manner, when power up commonly used just often, automatic change-over controlling and driving motor breaks off stand-by power supply, closed power supply commonly used, auxiliary contact signal commonly used is as the stopping signal of drive motors.In the present embodiment, bidirectional isolator 3 is two-way optical coupling isolator (certainly, also can adopt other isolating devices such as magnetic coupling isolator); Isolator power supply 1 promptly can be an Alternating Current Power Supply, also can be direct current supply.When power supply commonly used was supplied power, 1 power taking of isolator power supply was from power supply commonly used; When stand-by power supply was supplied power, 1 power taking of isolator power supply was provided for oneself and is used power supply; Auxiliary switch 2 often directly adopts/stand-by power supply in the auxiliary contact S1 of circuit breaker, fashionable when circuit breaker closing, auxiliary contact S1 is closed.The 1st pin of two-way optical coupling isolator 3 is connected with the A output of isolator power supply 1 through current-limiting resistance R1, auxiliary contact 2 successively; The 2nd pin is connected with the B output of isolator power supply 1; The 3rd pin is connected with the I/O mouth of the controller 4 of automatic change-over, the 4th pin ground connection.Resistance R 2 is a pull-up resistor, to ZC1 high level signal is provided, and an end of resistance R 2 connects low-voltage dc power supply, and the other end connects the 3rd pin of two-way optical coupling isolator 3.
Power supply commonly used and backup power source voltage acquired signal are sent into controller 4, and controller 4 is judged the supply voltage state, carry out the standing power source conversion of using thereby send the output signal.When auxiliary contact S1 was closed, two-way optical coupling isolator 3 had the voltage input, and its 3rd pin becomes low level by high level, sends into controller 4 thereby produce a pulse signal, confirmed when controller 4 detects pulse signal that auxiliary contact S1 is closed.When auxiliary contact S1 breaks off, two-way optical coupling isolator 3 input side no-voltages, its 3rd pin becomes high level signal by pulse signal, sends into microprocessor IC1.When detecting high level signal, microprocessor IC1 confirms that auxiliary contact S1 breaks off.Automatic change-over is according to the state decision control logic of detected auxiliary contact.
Claims (3)
- An automatic change-over normal/state detection circuit of subsequent use execution switch, comprise auxiliary switch and isolator; Auxiliary switch and said normal/subsequent use execution switch is chain, and serial connection goes in the current supply circuit of said isolator, it is characterized in that said isolator is a bidirectional isolator.
- According to claim 1 automatic change-over normal/state detection circuit of subsequent use execution switch, it is characterized in that said bidirectional isolator is two-way optical coupling isolator.
- According to claim 1 or claim 2 automatic change-over normal/state detection circuit of subsequent use execution switch, it is characterized in that said bidirectional isolator is by the power supply commonly used or the stand-by power supply power supply of said automatic change-over control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204085797U CN202285347U (en) | 2011-10-25 | 2011-10-25 | State detection circuit for main/standby execution switch of automatic change-over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204085797U CN202285347U (en) | 2011-10-25 | 2011-10-25 | State detection circuit for main/standby execution switch of automatic change-over switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202285347U true CN202285347U (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204085797U Expired - Lifetime CN202285347U (en) | 2011-10-25 | 2011-10-25 | State detection circuit for main/standby execution switch of automatic change-over switch |
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| CN (1) | CN202285347U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830262A (en) * | 2012-08-27 | 2012-12-19 | 无锡安邦电气有限公司 | Alternating current detection circuit based on bidirectional optocoupler |
| CN103852676A (en) * | 2012-11-30 | 2014-06-11 | 西门子公司 | Passive contact detection device and method |
| CN105548871A (en) * | 2015-12-09 | 2016-05-04 | 许继集团有限公司 | MMC sub-module bypass switch state detection device and MMC sub-module bypass switch |
| CN106098437A (en) * | 2016-08-24 | 2016-11-09 | 青岛艾迪森科技股份有限公司 | The self interlocking device of power-supply device inspection switch |
| JP7109376B2 (en) | 2016-05-19 | 2022-07-29 | イートン インテリジェント パワー リミテッド | Electronic device cutting |
-
2011
- 2011-10-25 CN CN2011204085797U patent/CN202285347U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830262A (en) * | 2012-08-27 | 2012-12-19 | 无锡安邦电气有限公司 | Alternating current detection circuit based on bidirectional optocoupler |
| CN102830262B (en) * | 2012-08-27 | 2015-04-22 | 无锡安邦电气有限公司 | Alternating current detection circuit based on bidirectional optocoupler |
| CN103852676A (en) * | 2012-11-30 | 2014-06-11 | 西门子公司 | Passive contact detection device and method |
| CN105548871A (en) * | 2015-12-09 | 2016-05-04 | 许继集团有限公司 | MMC sub-module bypass switch state detection device and MMC sub-module bypass switch |
| JP7109376B2 (en) | 2016-05-19 | 2022-07-29 | イートン インテリジェント パワー リミテッド | Electronic device cutting |
| CN106098437A (en) * | 2016-08-24 | 2016-11-09 | 青岛艾迪森科技股份有限公司 | The self interlocking device of power-supply device inspection switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120627 |
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| CX01 | Expiry of patent term |