CN100593274C - 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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- CN100593274C CN100593274C CN200810003987A CN200810003987A CN100593274C CN 100593274 C CN100593274 C CN 100593274C CN 200810003987 A CN200810003987 A CN 200810003987A CN 200810003987 A CN200810003987 A CN 200810003987A CN 100593274 C CN100593274 C CN 100593274C
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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 theauxiliary 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 controlledSi 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 faulty operation or because of circuit breaker actuating mechanism dumb and stuck; the combined floodgate circuit can not be disconnected; the electric current of closing coil increases, and surpass 3 seconds conduction time, and coil can burn because of heating; influence the safe operation of circuit breaker, 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, form by rectification circuit V3, breaker closing coil K, trip-preventing circuit 1, threshold voltage testing circuit 2, sound light alarming circuit 3, protection executive circuit 4, the element annexation of each circuit of breaker closing coil protect circuit is: the piezo-resistance RV2 of rectification circuit V3, after being attempted by 220V ac power input end N5 and N6, be connected with pin D4 with the pin B2 of the ac input end of rectification circuit V3 respectively; The pin C3 of the direct current output negative pole of rectification circuit V3 is connected to the negative pole of the LED of sound light alarming circuit 3, is being connected with the normally opened contact of row's subsidy contact on the relay K 0 of the S utmost point of the positive pole of an end of the resistance R 2 of protection executive circuit 4, voltage-stabiliser tube DW1, field effect transistor Q1, trip-preventing circuit 1 on the node between the LED negative pole of the pin C3 of the direct current output negative pole of rectification circuit V3 and sound light alarming circuit 3; First normally-closed contact that the other end of the resistance R 2 of protection executive circuit (4) relay K 1 next row by resistance R 1 and sound light alarming circuit 3 subsidizes the contact is connected, and is connected with the G utmost point of voltage-stabiliser tube DW1 negative pole, field effect transistor Q1 on the node between the other end of resistance R 2 and the resistance R 1; The power output end N8 of closing coil K is connected with the power input N9 of closing coil K by button T, closing coil K, and the power output end N8 of closing coil K is connected with the D utmost point of the positive pole of diode D2, field effect transistor Q1; The power input N9 of closing coil K is connected with first normally-closed contact of relay K 0 next row's subsidy contact of the negative pole of diode D2, trip-preventing circuit 1; A row subsidizes first normally-closed contact of contact, an end of relay K 0, the positive pole of diode D3 and is connected on the relay K 0 of circuit-breaker switching on-off state sampling anode N10 and trip-preventing circuit 1; The other end of relay K 0 is with after the negative pole of diode D3 is connected, and an end of the resistance R 4 of an end of second normally-closed contact of second normally-closed contact of the pin A1 by resistance R 0 and the output cathode of rectification circuit V3, relay K 0 next row's subsidy contact and sound light alarming circuit 3 relay K 1 next row's subsidy contact, resistance R 3 and threshold voltage testing circuit 2 is connected again; The LED of sound light alarming circuit 3 anodal be connected with the negative pole of threshold voltage testing circuit 2 diode D6 again after the K utmost point of controllable silicon Q2 is connected, the G utmost point of controllable silicon Q2 is connected with the voltage-stabiliser tube DW2 of threshold voltage testing circuit 2 is anodal, and the A utmost point of controllable silicon Q2 is connected to the other end of resistance R 3 by relay K 1; Be connected with the negative pole of capacitor C 1, the positive pole of voltage-stabiliser tube DW3, the negative pole of buzzer BELL on the node between the A utmost point of controllable silicon Q2 and the end of relay K 1, be connected with the positive pole of capacitor C 1, the negative pole of voltage-stabiliser tube DW3, the positive pole of buzzer BELL on the node between the other end of the other end of relay K 1 and resistance R 3; The negative pole of the voltage-stabiliser tube DW2 of threshold voltage testing circuit 2 is connected with the positive pole of the positive pole of capacitor C 2, diode D7, the other end of resistance R 4, and the negative pole of diode D7 is connected with circuit-breaker switching on-off state sampling anode N10; The negative pole of capacitor C 2 is connected with the positive pole of circuit-breaker switching on-off state sampling negative terminal N7, diode D6; The circuit-breaker switching on-off state sampling negative terminal N7 of described threshold voltage testing circuit 2 is connected with an end of the normally opened contact of auxiliary switch for circuit breaker, circuit-breaker switching on-off state sampling anode N10 is connected with the other end of this normally opened contact of auxiliary switch of circuit breaker, when the breaker closing success, connect mutually by will sample negative terminal N7, sampling anode N10 two ends of auxiliary contact, when breaker closing got nowhere, sampling negative terminal N7, sampling anode 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 a kind of medium voltage breaker close loop protection circuit from Fig. 1, the element annexation of each circuit is: the piezo-resistance RV2 of rectification circuit V3, after being attempted by 220V ac power input end N5 and N6, be connected with pin D4 with the pin B2 of the ac input end of rectification circuit V3 respectively; The pin C3 of the direct current output negative pole of rectification circuit V3 is connected to the negative pole of the LED of sound light alarming circuit 3, is being connected with the normally opened contact of row's subsidy contact on the relay K 0 of the S utmost point of the positive pole of an end of the resistance R 2 of protection executive circuit 4, voltage-stabiliser tube DW1, field effect transistor Q1, trip-preventing circuit 1 on the node between the LED negative pole of the pin C3 of the direct current output negative pole of rectification circuit V3 and sound light alarming circuit 3; First normally-closed contact that the other end of the resistance R 2 of protection executive circuit (4) relay K 1 next row by resistance R 1 and sound light alarming circuit 3 subsidizes the contact is connected, and is connected with the G utmost point of voltage-stabiliser tube DW1 negative pole, field effect transistor Q1 on the node between the other end of resistance R 2 and the resistance R 1; The power output end N8 of closing coil K is connected with the power input N9 of closing coil K by button T, closing coil K, and the power output end N8 of closing coil K is connected with the D utmost point of the positive pole of diode D2, field effect transistor Q1; The power input N9 of closing coil K is connected with first normally-closed contact of relay K 0 next row's subsidy contact of the negative pole of diode D2, trip-preventing circuit 1; A row subsidizes first normally-closed contact of contact, an end of relay K 0, the positive pole of diode D3 and is connected on the relay K 0 of circuit-breaker switching on-off state sampling anode N10 and trip-preventing circuit 1; The other end of relay K 0 is with after the negative pole of diode D3 is connected, and an end of the resistance R 4 of an end of second normally-closed contact of second normally-closed contact of the pin A1 by resistance R 0 and the output cathode of rectification circuit V3, relay K 0 next row's subsidy contact and sound light alarming circuit 3 relay K 1 next row's subsidy contact, resistance R 3 and threshold voltage testing circuit 2 is connected again; The LED of sound light alarming circuit 3 anodal be connected with the negative pole of threshold voltage testing circuit 2 diode D6 again after the K utmost point of controllable silicon Q2 is connected, the G utmost point of controllable silicon Q2 is connected with the voltage-stabiliser tube DW2 of threshold voltage testing circuit 2 is anodal, and the A utmost point of controllable silicon Q2 is connected to the other end of resistance R 3 by relay K 1; Be connected with the negative pole of capacitor C 1, the positive pole of voltage-stabiliser tube DW3, the negative pole of buzzer BELL on the node between the A utmost point of controllable silicon Q2 and the end of relay K 1, be connected with the positive pole of capacitor C 1, the negative pole of voltage-stabiliser tube DW3, the positive pole of buzzer BELL on the node between the other end of the other end of relay K 1 and resistance R 3; The negative pole of the voltage-stabiliser tube DW2 of threshold voltage testing circuit 2 is connected with the positive pole of the positive pole of capacitor C 2, diode D7, the other end of resistance R 4, and the negative pole of diode D7 is connected with circuit-breaker switching on-off state sampling anode N10; The negative pole of capacitor C 2 is connected with the positive pole of circuit-breaker switching on-off state sampling negative terminal N7, diode D6; The circuit-breaker switching on-off state sampling negative terminal N7 of described threshold voltage testing circuit 2 is connected with an end of the normally opened contact of auxiliary switch for circuit breaker, circuit-breaker switching on-off state sampling anode N10 is connected with the other end of this normally opened contact of auxiliary switch of circuit breaker, when the breaker closing success, connect mutually by will sample negative terminal N7, sampling anode N10 two ends of auxiliary contact, when breaker closing got nowhere, sampling negative terminal N7, sampling anode N10 two ends disconnected.
The present invention is when connecting 220V power operation starting button T, if during the breaker closing success, is connected on sampling negative terminal N7, sampling anode N10 two ends on the circuit breaker auxiliary contact, is connected by the circuit breaker auxiliary contact, and capacitor C 2 is not charged.If because of machinery or other cause; close a floodgate when getting nowhere; the auxiliary contact of circuit breaker can't be with sampling negative terminal N7; two terminations of sampling anode N10N are logical; sampling negative terminal N7; sampling anode N10 two ends detect the voltage of capacitor C 2; closing coil conduction time was above 3 seconds; capacitor C 2 charges to threshold voltage; the controllable silicon Q2 conducting immediately of sound light alarming circuit 3; LED sends ruddiness and reports to the police; buzzer BELL sends and pipes; protection relay K1 follows action; the normally-closed contact 4 of relay K 1 is disconnected with normally-closed contact 6, after the normally-closed contact 4 of relay K 1 disconnects with normally-closed contact 6, 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 K outage that are serially connected in the N8 end, reach the purpose of protection closing coil K.
The present invention adopts component specification to be; Field effect transistor Q1 is IRF830, and voltage-stabiliser tube DW1, DW2, DW3 are 12V0.5W, and diode D2, D3, D6, D7 are IN5408, rectifier diode is KBPC1010, relay K 0, K1 are JQK-13F, and resistance R 0 is that 1M, R3 are that 39K, R4 are 100K for 82K, R1, and piezo-resistance RV2 is 10K.
Claims (2)
1. medium voltage breaker close loop protection circuit, form by rectification circuit V3, breaker closing coil K, trip-preventing circuit (1), threshold voltage testing circuit (2), sound light alarming circuit (3), protection executive circuit (4), it is characterized in that: the element annexation of each circuit of described breaker closing coil protect circuit is: the piezo-resistance RV2 of rectification circuit V3, after being attempted by 220V ac power input end N5 and N6, be connected with pin D4 with the pin B2 of the ac input end of rectification circuit V3 respectively; The pin C3 of the direct current output negative pole of rectification circuit V3 is connected to the negative pole of the LED of sound light alarming circuit (3), is being connected with the normally opened contact of row's subsidy contact on the relay K 0 of the S utmost point of the positive pole of an end of the resistance R 2 of protection executive circuit (4), voltage-stabiliser tube DW1, field effect transistor Q1, trip-preventing circuit (1) on the node between the LED negative pole of the pin C3 of the direct current output negative pole of rectification circuit V3 and sound light alarming circuit (3); Next arranges the relay K 1 of the other end of the resistance R 2 of protection executive circuit (4) by resistance R 1 and sound light alarming circuit (3) first normally-closed contact of subsidizing the contact and is connected, and is connected with the G utmost point of voltage-stabiliser tube DW1 negative pole, field effect transistor Q1 on the node between the other end of resistance R 2 and the resistance R 1; The power output end N8 of closing coil K is connected with the power input N9 of closing coil K by button T, closing coil K, and the power output end N8 of closing coil K is connected with the D utmost point of the positive pole of diode D2, field effect transistor Q1; The power input N9 of closing coil K is connected with first normally-closed contact of relay K 0 next row's subsidy contact of the negative pole of diode D2, trip-preventing circuit (1); A row subsidizes first normally-closed contact of contact, an end of relay K 0, the positive pole of diode D3 and is connected on the relay K 0 of circuit-breaker switching on-off state sampling anode N10 and trip-preventing circuit (1); The other end of relay K 0 is with after the negative pole of diode D3 is connected, and an end of the resistance R 4 of an end of second normally-closed contact of second normally-closed contact of the pin A1 by resistance R 0 and the output cathode of rectification circuit V3, relay K 0 next row's subsidy contact and sound light alarming circuit (3) relay K 1 next row's subsidy contact, resistance R 3 and threshold voltage testing circuit (2) is connected again; The LED of sound light alarming circuit (3) anodal be connected with the negative pole of threshold voltage testing circuit (2) diode D6 again after the K utmost point of controllable silicon Q2 is connected, the G utmost point of controllable silicon Q2 is connected with the voltage-stabiliser tube DW2 of threshold voltage testing circuit (2) is anodal, and the A utmost point of controllable silicon Q2 is connected to the other end of resistance R 3 by relay K 1; Be connected with the negative pole of capacitor C 1, the positive pole of voltage-stabiliser tube DW3, the negative pole of buzzer BELL on the node between the A utmost point of controllable silicon Q2 and the end of relay K 1, be connected with the positive pole of capacitor C 1, the negative pole of voltage-stabiliser tube DW3, the positive pole of buzzer BELL on the node between the other end of the other end of relay K 1 and resistance R 3; The negative pole of the voltage-stabiliser tube DW2 of threshold voltage testing circuit (2) is connected with the positive pole of the positive pole of capacitor C 2, diode D7, the other end of resistance R 4, and the negative pole of diode D7 is connected with circuit-breaker switching on-off state sampling anode N10; The negative pole of capacitor C 2 is connected with the positive pole of circuit-breaker switching on-off state sampling negative terminal N7, diode D6.
2. a kind of medium voltage breaker close loop protection circuit according to claim 1; it is characterized in that: the circuit-breaker switching on-off state sampling negative terminal N7 of described threshold voltage testing circuit (2) is connected with an end of the normally opened contact of auxiliary switch for circuit breaker; circuit-breaker switching on-off state sampling anode N10 is connected with the other end of this normally opened contact of auxiliary switch of circuit breaker; when the breaker closing success; by the auxiliary contact negative terminal N7 that will sample; sampling anode N10 connects at two ends mutually; when breaker closing gets nowhere, sampling negative terminal N7; sampling anode N10 two ends disconnect.
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 CN101267106A (en) | 2008-09-17 |
| CN100593274C true CN100593274C (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810003987A Active CN100593274C (en) | 2008-01-25 | 2008-01-25 | A close loop protection circuit for middle voltage breaker |
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| CN (1) | CN100593274C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103022985B (en) * | 2012-12-07 | 2015-12-23 | 四川省电力公司内江电业局 | Closing coil protective device |
| 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 |
| 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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- 2008-01-25 CN CN200810003987A patent/CN100593274C/en active Active
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| CN101267106A (en) | 2008-09-17 |
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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. |