CN101267106A - A close loop protection circuit for middle voltage breaker - Google Patents
A close loop protection circuit for middle voltage breaker Download PDFInfo
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- CN101267106A CN101267106A CNA2008100039877A CN200810003987A CN101267106A CN 101267106 A CN101267106 A CN 101267106A CN A2008100039877 A CNA2008100039877 A CN A2008100039877A CN 200810003987 A CN200810003987 A CN 200810003987A CN 101267106 A CN101267106 A CN 101267106A
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Abstract
The present invention provides a medium voltage breaker closing coil protection circuit, including a rectifier circuit V3, an anti-trip circuit (1), a breaker closing coil K, further including a threshold voltage detecting circuit (2), an acoustooptic alarming circuit (3), a protection executing circuit (4), the N7, N10 two end points of the threshold voltage detecting circuit are connected on the auxiliary contact of the breaker, when the coil is closed unsuccessfully, if the coil sustainable power on exceeds 3 seconds, the capacitor C2 charges to the threshold voltage, making the controlled Si Q2 guide, the LED is lighted, buzzer is alarmed, protecting the delay K1 action, stopping the D end and the S end of the FET, making the closing coil broken, achieving the aim of protecting the closing coil, the invention has a simple structure, credible operation, when the breaker mechanism closing the coil is not successful, the protection circuit gives an alarming and cut the closing coil power timely, preventing the closing coil from damaged, fit for enterprise producing breakers.
Description
Technical field
The invention belongs to electronic technology field, particularly relate to the design of a kind of medium voltage breaker close loop protection circuit that uses on electric power system 6～40.5kV medium voltage breaker operating mechanism.
Background technology
The power panel of present 6～40.5kV medium voltage breaker has only rectification function; do not possess the coil protect function; the closing coil of circuit breaker operation mechanism; in faulty operation or dumb and stuck because of circuit breaker actuating mechanism, the combined floodgate circuit can not be disconnected, the electric current of closing coil increases; conduction time was above 3 seconds; coil can burn because of heating, influences the safe operation of circuit breaker, and this is to fail the basic technical problem that solves for a long time.Shortcoming at the closing coil of circuit breaker operation mechanism burns easily designs a kind of medium voltage breaker close loop protection circuit, ensures that the breaker safe operation is very important.
Summary of the invention
The purpose of this invention is to provide a kind of medium voltage breaker close loop protection circuit, the shortcoming of being burnt easily with the closing coil that overcomes present circuit breaker.
In order to realize above-mentioned purpose, technical scheme of the present invention is: a kind of medium voltage breaker close loop protection circuit comprises rectification circuit V3, trip-preventing circuit 1, breaker closing coil K, it is characterized in that: also be provided with threshold voltage testing circuit 2, sound light alarming circuit 3, protection executive circuit 4; The negative pole of the capacitor C 2 of described threshold voltage testing circuit 2 is connected with the positive pole of N7 end, diode D6, and the negative pole of diode D6 is connected with the positive pole of the LED of sound light alarming circuit 3, the K utmost point of controllable silicon Q2, and the positive pole of capacitor C 2 is connected with negative pole, the positive pole of diode D7, resistance R 4 one ends of voltage-stabiliser tube DW2; One end of the relay K 1 of described sound light alarming circuit 3 and the A utmost point of controllable silicon Q2, the negative pole of capacitor C 1, the positive pole of voltage-stabiliser tube DW3, the negative pole of buzzer BELL is connected, the K utmost point of controllable silicon Q2 and the positive pole of LED, the negative pole of the diode D6 of threshold voltage testing circuit 2 is connected, the G utmost point of controllable silicon Q2 is connected with the positive pole of the voltage-stabiliser tube DW2 of threshold voltage testing circuit 2, and the positive pole of the other end of relay K 1 and capacitor C 1, the negative pole of voltage-stabiliser tube DW3, the positive pole of buzzer BELL, one end of resistance R 3 is connected, and resistance R 4 other ends of the other end of resistance R 3 and threshold voltage testing circuit 2, the contact 4 of relay K 1, one end of the resistance R 0 of trip-preventing circuit 1, the contact 5 of relay K 0, the pin 1 of rectification circuit V3 is connected; The negative pole of the contact 4 of the relay K 0 of one end of the S utmost point of the field effect transistor Q1 of described protection executive circuit 4 and the positive pole of voltage-stabiliser tube DW1, resistance R 2, the pin 3 of rectification circuit V3, trip-preventing circuit 1, the LED of sound light alarming circuit 3 is connected, and the D utmost point of field effect transistor Q1 is connected with positive pole, N8 end, the starting button of diode D2, and the G utmost point of field effect transistor Q1 is connected with an end of resistance R 1, the negative pole of voltage-stabiliser tube DW1, the other end of resistance R 2, and the other end of resistance R 1 is connected with the contact 6 of the relay K 1 of sound light alarming circuit 3; The N7 of described threshold voltage testing circuit 2, N10 two ends are connected with the auxiliary contact of circuit breaker respectively, when the breaker closing success, by auxiliary contact N7, N10 two ends are connected mutually, and when breaker closing was unsuccessful, N7, N10 two ends disconnected.
Adopt the present invention of above-mentioned measure have circuit structure simple, reliable, when circuit breaker operation mechanism breaks down, can provide sound and light alarm and the time and cut off closing coil power supply, the advantage that the protection closing coil is not burnt.
Description of drawings
The present invention is described in more detail below in conjunction with accompanying drawing.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Referring to accompanying drawing 1, Fig. 1 is circuit theory diagrams of the present invention, can see that from Fig. 1 a kind of medium voltage breaker close loop protection circuit comprises rectification circuit V3, trip-preventing circuit 1, breaker closing coil K, also be provided with threshold voltage testing circuit 2, sound light alarming circuit 3, protection executive circuit 4; The annexation of this threshold voltage testing circuit 2 is: the negative pole of capacitor C 2 is connected with the positive pole of N7 end, diode D6, and the negative pole of diode D6 is connected with the positive pole of the LED of sound light alarming circuit 3, the K utmost point of controllable silicon Q2, and the positive pole of capacitor C 2 is connected with negative pole, the positive pole of diode D7, resistance R 4 one ends of voltage-stabiliser tube DW2; The annexation of this sound light alarming circuit 3 is: an end of relay K 1 and the A utmost point of controllable silicon Q2, the negative pole of capacitor C 1, the positive pole of voltage-stabiliser tube DW3, the negative pole of buzzer BELL is connected, the K utmost point of controllable silicon Q2 and the positive pole of LED, the negative pole of the diode D6 of threshold voltage testing circuit 2 is connected, the G utmost point of controllable silicon Q2 is connected with the positive pole of the voltage-stabiliser tube DW2 of threshold voltage testing circuit 2, and the positive pole of the other end of relay K 1 and capacitor C 1, the negative pole of voltage-stabiliser tube DW3, the positive pole of buzzer BELL, one end of resistance R 3 is connected, and resistance R 4 other ends of the other end of resistance R 3 and threshold voltage testing circuit 2, the contact 4 of relay K 1, one end of the resistance R 0 of trip-preventing circuit 1, the contact 5 of relay K 0, the pin 1 of rectification circuit V3 is connected; The annexation of this protection executive circuit 4 is: the negative pole of the contact 4 of the relay K 0 of an end of the S utmost point of field effect transistor Q1 and the positive pole of voltage-stabiliser tube DW1, resistance R 2, the pin 3 of rectification circuit V3, trip-preventing circuit 1, the LED of sound light alarming circuit 3 is connected, and the D utmost point of field effect transistor Q1 is connected with positive pole, N8 end, the starting button of diode D2, and the G utmost point of field effect transistor Q1 is connected with an end of resistance R 1, the negative pole of voltage-stabiliser tube DW1, the other end of resistance R 2, and the other end of resistance R 1 is connected with the contact 6 of the relay K 1 of sound light alarming circuit 3; The N7 of this threshold voltage testing circuit 2, N10 two ends are connected with the auxiliary contact of circuit breaker respectively, when the breaker closing success, by auxiliary contact N7, N10 two ends are connected mutually, and when breaker closing was unsuccessful, N7, N10 two ends disconnected.
The present invention when the breaker closing success, is connected on N7, N10 two ends on the circuit breaker auxiliary contact when connecting 220V power operation starting button T, is connected by the circuit breaker auxiliary contact, and capacitor C 2 is not charged.When because of machinery or other cause; close a floodgate when getting nowhere; the auxiliary contact of circuit breaker can't be with N7; two terminations of N10 are logical; N7; the N10 two ends detect the voltage of closing coil; closing coil conduction time was above 3 seconds; capacitor C 2 charges to threshold voltage; the controllable silicon Q2 conducting immediately of protective circuit 2; LED sends ruddiness and reports to the police; buzzer BELL sends and pipes; protection relay K1 follows action; 4 pin and 6 pin of relay K 1 are disconnected, after 4 pin of relay K 1 and 6 pin disconnect, D end and the S end of the field effect transistor Q1 of protection executive circuit 4 are ended; thereby make the starting button T and the closing coil outage that are serially connected in the N8 end, reach the purpose of protection closing coil.
The present invention adopts component specification to be: capacitor C 1, C2 are 470uF/35V, controllable silicon Q2 is MCR100-8, field effect transistor Q1 is IRF830, voltage-stabiliser tube DW1, DW2, DW3 are 12V0.5W, diode D2, D3, D6, D7 are IN5408, and rectifier diode is KBPC1010, and relay K 0, K1 are JQX-13F, resistance R 0 is that 1M, R3 are that 39K, R4 are 100K for 82K, R1, and piezo-resistance RV2 is 10K.
Claims (3)
1. a medium voltage breaker close loop protection circuit comprises rectification circuit V3, trip-preventing circuit (1), breaker closing coil K, it is characterized in that: also be provided with threshold voltage testing circuit (2), sound light alarming circuit (3), protection executive circuit (4).
2. a kind of medium voltage breaker close loop protection circuit according to claim 1, it is characterized in that: the negative pole of the capacitor C 2 of described threshold voltage testing circuit (2) is connected with the positive pole of N7 end, diode D6, and the negative pole of diode D6 is connected with the positive pole of the LED of sound light alarming circuit (3), the K utmost point of controllable silicon Q2, and the positive pole of capacitor C 2 is connected with negative pole, the positive pole of diode D7, resistance R 4 one ends of voltage-stabiliser tube DW2; One end of the relay K 1 of described sound light alarming circuit (3) and the A utmost point of controllable silicon Q2, the negative pole of capacitor C 1, the positive pole of voltage-stabiliser tube DW3, the negative pole of buzzer BELL is connected, the K utmost point of controllable silicon Q2 and the positive pole of LED, the negative pole of the diode D6 of threshold voltage testing circuit (2) is connected, the G utmost point of controllable silicon Q2 is connected with the positive pole of the voltage-stabiliser tube DW2 of threshold voltage testing circuit (2), and the positive pole of the other end of relay K 1 and capacitor C 1, the negative pole of voltage-stabiliser tube DW3, the positive pole of buzzer BELL, one end of resistance R 3 is connected, and resistance R 4 other ends of the other end of resistance R 3 and threshold voltage testing circuit (2), the contact of relay K 1 (4), one end of the resistance R 0 of trip-preventing circuit (1), the contact of relay K 0 (5), the pin of rectification circuit V3 (1) is connected; The S utmost point of the field effect transistor Q1 of described protection executive circuit (4) and the positive pole of voltage-stabiliser tube DW1; one end of resistance R 2; the pin of rectification circuit V3 (3); the contact (4) of the relay K 0 of trip-preventing circuit (1); the negative pole of the LED of sound light alarming circuit (3) is connected; and the positive pole of the D utmost point of field effect transistor Q1 and diode D2; the N8 end; the starting button is connected; and an end of the G utmost point of field effect transistor Q1 and resistance R 1; the negative pole of voltage-stabiliser tube DW1; the other end of resistance R 2 is connected, and the other end of resistance R 1 is connected with the contact (6) of the relay K 1 of sound light alarming circuit (3).
3. a kind of medium voltage breaker close loop protection circuit according to claim 1; it is characterized in that: the N7 of described threshold voltage testing circuit (2), N10 two ends are connected with the auxiliary contact of circuit breaker respectively; when the breaker closing success; by auxiliary contact N7, N10 two ends are connected mutually; when breaker closing was unsuccessful, N7, N10 two ends disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810003987A CN100593274C (en) | 2008-01-25 | 2008-01-25 | A close loop protection circuit for middle voltage breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810003987A CN100593274C (en) | 2008-01-25 | 2008-01-25 | A close loop protection circuit for middle voltage breaker |
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| Publication Number | Publication Date |
|---|---|
| CN101267106A true CN101267106A (en) | 2008-09-17 |
| CN100593274C CN100593274C (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810003987A Active CN100593274C (en) | 2008-01-25 | 2008-01-25 | A close loop protection circuit for middle voltage breaker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879736A (en) * | 2012-10-16 | 2013-01-16 | 国家电网公司 | Automatic detection alarming protection device for opening and closing of circuit breaker |
| CN103022985A (en) * | 2012-12-07 | 2013-04-03 | 四川省电力公司内江电业局 | Protection device of closing coil |
| CN104614603A (en) * | 2015-01-08 | 2015-05-13 | 国电南瑞科技股份有限公司 | On-site protection device status detection system and detection method thereof |
| CN106911121A (en) * | 2017-04-21 | 2017-06-30 | 贵州电网有限责任公司 | A kind of guard method of intelligent breaker closing coil protection device |
| CN112564040A (en) * | 2020-11-30 | 2021-03-26 | 国网河南省电力公司灵宝市供电公司 | Shock wave accelerated transformer backup protection device |
-
2008
- 2008-01-25 CN CN200810003987A patent/CN100593274C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879736A (en) * | 2012-10-16 | 2013-01-16 | 国家电网公司 | Automatic detection alarming protection device for opening and closing of circuit breaker |
| CN102879736B (en) * | 2012-10-16 | 2016-07-06 | 国网山东省电力公司广饶县供电公司 | Chopper on/off switch automatic detection warning protection device |
| CN103022985A (en) * | 2012-12-07 | 2013-04-03 | 四川省电力公司内江电业局 | Protection device of closing coil |
| CN104614603A (en) * | 2015-01-08 | 2015-05-13 | 国电南瑞科技股份有限公司 | On-site protection device status detection system and detection method thereof |
| CN104614603B (en) * | 2015-01-08 | 2017-04-12 | 国电南瑞科技股份有限公司 | On-site protection device status detection system and detection method thereof |
| CN106911121A (en) * | 2017-04-21 | 2017-06-30 | 贵州电网有限责任公司 | A kind of guard method of intelligent breaker closing coil protection device |
| CN112564040A (en) * | 2020-11-30 | 2021-03-26 | 国网河南省电力公司灵宝市供电公司 | Shock wave accelerated transformer backup protection device |
| CN112564040B (en) * | 2020-11-30 | 2022-10-28 | 国网河南省电力公司灵宝市供电公司 | Shock wave accelerated transformer backup protection device |
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| Publication number | Publication date |
|---|---|
| CN100593274C (en) | 2010-03-03 |
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Effective date of registration: 20200929 Address after: 536000 Information Center building of Yinhe software science and Technology Park, No.11 Xizang Road, Beihai City, Guangxi Zhuang Autonomous Region Patentee after: GUANGXI YINHE DECOM ELECTRIC Co.,Ltd. Address before: 536000, the Guangxi Zhuang Autonomous Region, Tibet Beihai Road, 11 building complex, Galaxy Switch Technology Department Patentee before: BEIHAI GALAXY SWITCH DEVICES Co.,Ltd. |