CN103426695B - A kind of prevent breaker coil from burning method and device - Google Patents
A kind of prevent breaker coil from burning method and device Download PDFInfo
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- CN103426695B CN103426695B CN201310333512.5A CN201310333512A CN103426695B CN 103426695 B CN103426695 B CN 103426695B CN 201310333512 A CN201310333512 A CN 201310333512A CN 103426695 B CN103426695 B CN 103426695B
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Abstract
The invention provides a kind of prevent breaker coil from burning method and device, when 35KV and 10KV electric power system is carried out operation and line fault tripping operation or is closed a floodgate, utilize this device can ensure, when starting normal circuit breaker tripping operation or closing circuit, to start 3SJ time delay cutoff circuit simultaneously.Switch normal at 3 second time inner breaker, the automatic loss of excitation of the 3SJ time relay returns, and does not affect circuit breaker and normally runs.After 3 seconds, 3SJ time relay time delay make contact is closed starts 3ZJ auxiliary relay, and 3ZJ break contact is opened, and has 3ZJ break contact cut-off breaker to trip and closing circuit, thus realization minimizing breaker coil burns probability.Direct start-up study cutoff circuit after spy of the present invention sets up and connected by circuit breaker dynamic circuit breaker and make contact, plays the object of protective circuit breaker tripping operation and closing coil.
Description
Technical field
The invention provides a kind of method preventing breaker coil from burning, solve the problem that tripping coil burns, additionally provide simultaneously and realize the concrete device of the method, belong to the protective device technical field of 35KV and 10KV electric power system.
technical background
Current 35KV and 10KV electric power system circuit breaker tripping coil burns phenomenon and happens occasionally, and its reason is existing circuit breaker tripping coil all by short time energising design, when there is trip electromagnet fault, causes iron core top not absolve buckle mechanism; The interior conducting rod of breaker body, kinematic link are stuck, cause iron core to refuse deciliter; The adjustment of auxiliary switch position is improper, occurs that normally opened contact and normally-closed contact close simultaneously; The long-term self-sustainings of remote control trip(ping) circuit etc. all form tripping coil and are energized for a long time and cause circuit breaker tripping coil to burn.Burn once there is tripping coil, certainly will line outage be caused, occur few power transmission and can not the consequence of power transmission in time, thus extreme influence power supply reliability, thus effectively reinforcement circuit breaker tripping coil employ all means available imperative.
Summary of the invention
The invention provides a kind of method preventing breaker coil from burning, increase in the control loop of original 35KV and 10KV electric power system a circuit breaker dynamic circuit breaker and make contact simultaneously closed time a starting-up later time and time delay cutoff circuit, realize can not normally trip at circuit breaker, close a floodgate or auxiliary switch for circuit breaker position adjustment improper, when occurring that circuit breaker dynamic circuit breaker and make contact close simultaneously, cut-off breaker tripping operation and closing circuit, send circuit breaker failure signal simultaneously.Further circuit breaker failure is checked again, after eliminating fault, recover normally to run.
the method preventing breaker coil from burning provided by the invention, its technical solution is as follows:
Comprise closing circuit, trip(ping) circuit, auxiliary contact switch improper starting-up later time, time delay cutoff circuit.
In auxiliary switch for circuit breaker position, adjustment is improper, during the phenomenon that appearance auxiliary switch dynamic circuit breaker and make contact close simultaneously, the series loop relay start-up time 3KT time delay cutoff circuit be made up of break contact and the make contact of circuit breaker, until time-delay relay 3KT excitation after 3 seconds, its time delay make contact closes, start auxiliary relay 3ZJ coil, two pairs of break contacts of 3ZJ relay are opened, and realize cut-off breaker tripping operation and closing circuit.
realize the device preventing breaker coil from burning method of the present invention, it is characterized in that:
A closing circuit of circuit breaker:
When closing a floodgate when adopting control switch SA or carry out reclosing after line tripping, control switch SA 5. with the SA 8. closing of contact or the reclosing ZHJ1 closing of contact: make sending closing pulse to the series loop be made up of 3ZJ1 contact, QF1 contact, LC coil, realize breaker closing; Start 3KT time relay coil.
A circuit breaker trip loop:
When adopting control switch SA tripping operation or trip protection, control switch SA 6. with the SA 7. closing of contact or the KOM closing of contact: starts the anti-relay K CF coil that jumps, its break contact KCF2 opens, disconnection closing circuit; Send tripping operation pulse order to the series loop be made up of 3ZJ2 contact, QF2 contact, LT coil, realize circuit breaker trip; Start 3KT coil.
A time delay cutoff circuit:
When circuit breaker carry out tripping or contract time; Tripping operation or closing pulse order are sent out in the trip(ping) circuit be composed in series to the closing circuit be composed in series by 3ZJ1, QF1, LC or 3ZJ2, QF2, LT; Circuit breaker correctly closes a floodgate or trips (complete breaker tripping and closing mechanical switch and normally should be less than 2 seconds), will to realize by 4R and HWJ or 3R and TWJ, to 3KT coil dividing potential drop, 3KT coil loss of excitation being returned; After 3KT coil magnetization starts, as circuit breaker breaker tripping and closing switch incorrect within 3 second time, after 3 seconds, its make contact 3KT1 closes, startup 3ZJ coil, its break contact 3ZJ1 and 3ZJ2 cut-off breaker closing circuit and trip(ping) circuit.
Improper loop changed by auxiliary contact
At circuit breaker trip or when closing a floodgate, when occurring that its dynamic circuit breaker and make contact are connected simultaneously, QF3 and QF4 is all closed, the series loop be made up of QF3 and QF4 starts 3KT coil, its time delay make contact 3KT1 is closed after 3 seconds starts 3ZJ coil, by 3ZJ1 and 3ZJ2 break contact cut-off breaker closing circuit and trip(ping) circuit.Send circuit breaker switch failure signal simultaneously.
one disclosed by the invention prevents breaker coil from burning device, it is characterized in that:
Changed improper loop formed by closing circuit of circuit breaker, circuit breaker trip loop, time delay cutoff circuit, auxiliary contact; Wherein,
1) closing circuit of circuit breaker:
By breaker control switch S A, reclosing outlet contact 2HJ1, the break contact KCF2 of the anti-relay that jumps, the break contact 3ZJ1 of auxiliary relay, circuit breaker break contact QF1, breaker closing contactor LC coil and tripping position relay TWJ coil and 3R resistance composition; Connecting with forming with the break contact KCF2 of the anti-relay that jumps after the 2HJ1 parallel connection of reclosing contact in the contact of breaker control switch S A, is connected to power supply FU positive pole and tripping position relay TWJ coil; The break contact 3ZJ1 of auxiliary relay forms with circuit breaker break contact QF1 and breaker closing contactor coil LC and connects, and is connected to power supply FU negative pole and tripping position relay TWJ coil; Power supply FU positive pole is connected to after divider resistance 3R and tripping position relay TWJ coils connected in series.
2) circuit breaker trip loop:
By breaker control switch S A, protection exit relay contact KOM, the break contact 3ZJ2 of anti-jump relay K CF coil, auxiliary relay, circuit breaker make contact QF2, circuit breaker trip coil LT and closing operation position relay HWJ coil and 4R resistance composition; With the anti-relay K CF coils connected in series that jumps after breaker control switch S A contact is in parallel with protection exit relay contact KOM, be connected to power supply FU positive pole and closing operation position relay HWJ coil; The break contact 3ZJ2 of auxiliary relay forms with circuit breaker make contact QF2 and circuit breaker trip coil LT and connects, and is connected to power supply FU negative pole and closing operation position relay HWJ coil; Power supply FU positive pole is connected to after divider resistance 4R and closing operation position relay HWJ coils connected in series;
3) time delay cutoff circuit:
By time relay 3KT coil and time delay make contact 3KT1 thereof, auxiliary relay 3ZJ coil forms; Time relay 3KT coil is connected to closing operation position relay HWJ coil and power supply FU negative pole, time relay time delay make contact 3KT1 is connected power supply FU positive pole and negative pole respectively with after auxiliary relay 3ZJ coils connected in series, and described time relay 3KT is provided with the time delay of 3 seconds;
4) improper loop changed by auxiliary contact:
Be composed in series by circuit breaker a pair break contact QF3 and make contact QF4; Circuit breaker break contact QF3 is connected positive source 1 and closing operation position relay HWJ coil with after make contact QF4 series connection.
the course of work of the present invention is as follows:
When circuit breaker carries out closing a floodgate or tripping, while starting tripping or closing circuit, start another time delay cutoff circuit 3KT.As breaker mechanism switches correct, circuit breaker switches normally, adopts position relay voltage divider principle that time-delay relay 3KT loss of excitation is returned.As circuit breaker switches incorrect, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closes, and this contact starts auxiliary relay 3ZJ coil, and its break contact is opened.Because 3ZJ two couples of break contact 3ZJ1 and 3ZJ2 are serially connected with in circuit breaker trip and closing circuit, thus realize the object of cut-off breaker tripping operation and closing circuit.Two is improper in the adjustment of auxiliary switch for circuit breaker position, during the phenomenon that appearance auxiliary switch dynamic circuit breaker and make contact close simultaneously, the series loop be made up of circuit breaker break contact and make contact starts 3KT time delay cutoff circuit, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closes, start auxiliary relay 3ZJ coil, two pairs of break contacts of 3ZJ relay are opened, and realize cut-off breaker tripping operation and closing circuit.
good effect of the present invention is:
When 35KV and 10KV electric power system is carried out operation and line fault tripping operation or closed a floodgate, utilize this device can ensure, when starting normal circuit breaker tripping operation or closing circuit, to start 3SJ time delay cutoff circuit simultaneously.As normal in switched at 3 second time inner breaker, the automatic loss of excitation of the 3SJ time relay returns, and does not affect circuit breaker and normally runs.The abnormal conditions such as breaker mechanism fault, auxiliary switch contact change-over are not in place as occurred, the long-term self-sustaining of remote control circuit cause circuit breaker can not normally to switch in 3 seconds, after 3 seconds, 3SJ time relay time delay make contact is closed starts 3ZJ auxiliary relay, 3ZJ break contact is opened, have 3ZJ break contact cut-off breaker to trip and closing circuit, thus realization minimizing breaker coil burn probability.Due to actual circuit breaker emerged in operation circuit breaker dynamic circuit breaker and make contact, to connect the probability causing tripping coil to burn higher simultaneously; direct start-up study cutoff circuit after this device spy sets up and connected by circuit breaker dynamic circuit breaker and make contact, plays the object of protective circuit breaker tripping operation and closing coil.
Accompanying drawing explanation
Fig. 1 is logic diagram of the present invention;
Fig. 2 is apparatus of the present invention circuit theory diagrams;
In figure, SA-breaker control switch; 2HJ1-reclosing outlet contact; KCF2-prevents jumping the break contact of relay; The break contact of 3ZJ1-auxiliary relay; QF1-circuit breaker break contact; LC-breaker closing contactor coil; TWJ-tripping position relay coil; 3R-resistance; FU-power supply; KOM-protection exit relay contact; The break contact of KCF-anti-jump relay coil, 3ZJ2-auxiliary relay; QF2-circuit breaker make contact; LT-circuit breaker trip coil; HWJ-closing operation position relay coil; 4R-resistance; 3KT-time relay coil; 3KT1-time delay make contact; 3ZJ-auxiliary relay coil; QF3-circuit breaker break contact; QF4-circuit breaker make contact.
embodiment:
Following content is to invention has been detailed discussion, and this description belongs to illustrative but not determinate, also can enumerate several examples, therefore do not departing from the amendment under general plotting of the present invention, should belong within protection scope of the present invention outside this.
embodiment 1
According to Fig. 1, the present invention realizes when circuit breaker carries out closing a floodgate or tripping, and while starting tripping or closing circuit, starts another time delay cutoff circuit 3KT.As breaker mechanism switches correct, circuit breaker switches normally, adopts position relay voltage divider principle that time-delay relay 3KT loss of excitation is returned.As circuit breaker switches incorrect, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closes, and this contact starts auxiliary relay 3ZJ coil, and its break contact is opened.Because 3ZJ two couples of break contact 3ZJ1 and 3ZJ2 are serially connected with in circuit breaker trip and closing circuit, thus realize the object of cut-off breaker tripping operation and closing circuit.Simultaneously improper in order to prevent auxiliary switch for circuit breaker position from adjusting, there is auxiliary switch dynamic circuit breaker and make contact closed phenomenon of burning circuit breaker trip and closing coil simultaneously, be provided with the series loop be made up of circuit breaker break contact and make contact and start 3KT timing circuit, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closes, start auxiliary relay 3ZJ coil, two pairs of break contacts of 3ZJ relay are opened, because 3ZJ two couples of break contact 3ZJ1 and 3ZJ2 are serially connected with in circuit breaker trip and closing circuit, realize cut-off breaker tripping operation and closing circuit.
With reference to shown in Fig. 2, apparatus of the present invention primarily of closing circuit of circuit breaker, circuit breaker trip loop, time delay cutoff circuit, improper loop composition changed by auxiliary contact; Wherein:
closing circuit of circuit breaker:
Device exports contact ZHJ1 by breaker control switch S A, reclosing, anti-relay break contact KCF2, auxiliary relay break contact 3ZJ1, circuit breaker break contact QF1, breaker closing contactor LC coil and tripping position relay TWJ coil and the 3R resistance of jumping forms.
8. 5. the SA of breaker control switch connect with forming with the break contact KCF2 of the anti-relay that jumps after the ZHJ1 parallel connection of reclosing contact contact with SA, is connected to positive source and tripping position relay TWJ coil.The break contact 3ZJ1 of auxiliary relay forms with circuit breaker break contact QF1 and breaker closing contactor coil LC and connects, and is connected to power cathode 2 and tripping position relay TWJ coil.Positive source 1 is connected to after divider resistance 3R and tripping position relay TWJ coils connected in series.
When closing a floodgate when adopting control switch SA or carry out reclosing after line tripping, control switch SA 5. with the SA 8. closing of contact or the reclosing ZHJ1 closing of contact, realize following two functions: one is sending closing pulse order to the series loop be made up of 3ZJ1 contact, QF1 contact, LC coil, realizing breaker closing.Two is start 3KT time relay coil.Namely TWJ relay can be used for circuit breaker trip position and monitors, can realize again the effect to LC coil dividing potential drop and 3KT coil dividing potential drop.3R and TWJ coils connected in series plays dividing potential drop and prevents the effect of TWJ coil burnout.
circuit breaker trip loop:
Device by breaker control switch S A, protection exit relay contact KOM, the anti-relay K CF coil that jumps, auxiliary relay break contact 3ZJ2, circuit breaker make contact QF2, circuit breaker trip coil LT and closing operation position relay HWJ coil and 4R resistance composition.
The SA of breaker control switch 6. with SA 7. contact in parallel with protection exit relay contact KOM after with the anti-relay K CF coils connected in series that jumps, be connected to positive source and closing operation position relay HWJ coil.The break contact 3ZJ2 of auxiliary relay forms with circuit breaker make contact QF2 and circuit breaker trip coil LT and connects, and is connected to power cathode 2 and closing operation position relay HWJ coil.Positive source 1 is connected to after divider resistance 4R and closing operation position relay HWJ coils connected in series.
When adopting control switch SA tripping operation or trip protection, control switch SA 6. with the SA 7. closing of contact or the KOM closing of contact, realize following three functions: one is start the anti-relay K CF coil that jumps, and its break contact KCF2 opens, and disconnects closing circuit.Two is send tripping operation pulse order to the series loop be made up of 3ZJ2 contact, QF2 contact, LT coil, realizes circuit breaker trip.Three is start 3KT coil.Namely HWJ relay can be used for breaker closing position and monitors, can realize again the effect to LT coil dividing potential drop and 3KT coil dividing potential drop.43R and HWJ coils connected in series plays dividing potential drop and prevents the effect of HWJ coil burnout.
time delay cutoff circuit:
Device is by time relay 3KT coil and time delay make contact thereof, and auxiliary relay 3ZJ coil forms.Normally trip in order to ensure circuit breaker or contract mechanism mechanical switch, time relay 3KT is provided with the time delay of 3 seconds.
Time relay 3KT coil is connected to closing operation position relay HWJ coil and power cathode 2, and time relay time delay make contact 3KT1 is connected positive source 1 and negative pole 2 respectively with after auxiliary relay 3ZJ coils connected in series.
When circuit breaker carry out tripping or contract time, realize following two functions, one is that tripping operation or closing pulse order are sent out in the trip(ping) circuit be composed in series to the closing circuit be composed in series by 3ZJ1, QF1, LC or 3ZJ2, QF2, LT, correctly close a floodgate as circuit breaker or trip (complete breaker tripping and closing mechanical switch and normally should be less than 2 seconds), to realize by 4R and HWJ or 3R and TWJ, to 3KT coil dividing potential drop, 3KT coil loss of excitation being returned.Two is after 3KT coil magnetization starts, and as circuit breaker breaker tripping and closing switch incorrect within 3 second time, after 3 seconds, its make contact 3KT1 closes, startup 3ZJ coil, its break contact 3ZJ1 and 3ZJ2 cut-off breaker closing circuit and trip(ping) circuit.
improper loop changed by auxiliary contact:
Device is composed in series by circuit breaker a pair break contact QF3 and make contact QF4.
Circuit breaker break contact QF3 is connected positive source 1 and closing operation position relay HWJ coil with after make contact QF4 series connection.
At circuit breaker trip or when closing a floodgate, when occurring that its dynamic circuit breaker and make contact are connected simultaneously, QF3 and QF4 is all closed, the series loop be made up of QF3 and QF4 starts 3KT coil, its time delay make contact 3KT1 is closed after 3 seconds starts 3ZJ coil, by 3ZJ1 and 3ZJ2 break contact cut-off breaker closing circuit and trip(ping) circuit.Send circuit breaker switch failure signal simultaneously.
Claims (1)
1. prevent breaker coil from burning a device, it is characterized in that: by closing circuit of circuit breaker, circuit breaker trip loop, improper starting-up later time changed by auxiliary contact, time delay cutoff circuit is formed; Wherein,
1) closing circuit of circuit breaker:
By breaker control switch S A, reclosing outlet contact ZHJ1, the break contact KCF2 of the anti-relay that jumps, the break contact 3ZJ1 of auxiliary relay, circuit breaker break contact QF1, breaker closing contactor LC coil and tripping position relay TWJ coil and divider resistance 3R form; Form with the break contact KCF2 of the anti-relay that jumps after closing contact and the reclosing of breaker control switch S A export contact ZHJ1 parallel connection and connect, be connected to positive source FU1 and tripping position relay coil TWJ; The break contact 3ZJ1 of auxiliary relay forms with circuit breaker break contact QF1 and breaker closing contactor coil LC and connects, and is connected to power supply FU2 negative pole and tripping position relay coil TWJ; Divider resistance 3R is connected to positive source FU1 after connecting with tripping position relay coil TWJ;
2) circuit breaker trip loop:
By breaker control switch S A, protection exit relay contact KOM, the break contact 3ZJ2 of anti-jump relay coil KCF, auxiliary relay, circuit breaker make contact QF2, circuit breaker trip coil LT and closing operation position relay coil HWJ and divider resistance 4R form; Breaker control switch S A trip contact is connected with the anti-relay coil KCF that jumps with after protection exit relay contact KOM parallel connection, is connected to positive source FU1 and closing operation position relay coil HWJ; The break contact 3ZJ2 of auxiliary relay forms with circuit breaker make contact QF2 and circuit breaker trip coil LT and connects, and is connected to power cathode FU2 and closing operation position relay coil HWJ; Divider resistance 4R is connected to positive source FU1 after connecting with closing operation position relay coil HWJ;
3) improper starting-up later time changed by auxiliary contact
Connect hours relay coil 3KT one end after being connected with break contact QF3 and make contact QF4 by positive source FU1, the time relay coil 3KT other end and power cathode FU2 connect to form;
4) time delay cutoff circuit:
By time relay coil 3KT and time delay make contact 3KT1 thereof, auxiliary relay coil 3ZJ forms; Time relay coil 3KT connects closing operation position relay coil HWJ and power cathode FU2; Time relay time delay make contact 3KT1 is connected positive source FU1 and power cathode FU2 after connecting with auxiliary relay coil 3ZJ respectively, and for ensureing the normal breaker tripping and closing of circuit breaker, described time relay 3KT is provided with the time delay of 3 seconds; Break contact 3,ZJ1 mono-end of auxiliary relay is connected to circuit breaker break contact QF1, an end is connected to tripping position relay coil TWJ;
Break contact 3,ZJ2 mono-end of auxiliary relay is connected to circuit breaker make contact QF2, an end is connected to closing operation position relay coil HWJ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310333512.5A CN103426695B (en) | 2013-08-02 | 2013-08-02 | A kind of prevent breaker coil from burning method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310333512.5A CN103426695B (en) | 2013-08-02 | 2013-08-02 | A kind of prevent breaker coil from burning method and device |
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| Publication Number | Publication Date |
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| CN103426695A CN103426695A (en) | 2013-12-04 |
| CN103426695B true CN103426695B (en) | 2016-01-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839702B (en) * | 2014-03-27 | 2015-10-07 | 莱芜钢铁集团有限公司 | A kind of closing circuit of circuit breaker |
| CN105406447A (en) * | 2015-11-20 | 2016-03-16 | 河南平芝高压开关有限公司 | Closing coil protection apparatus |
| CN106057595B (en) * | 2016-07-21 | 2018-09-11 | 华自科技股份有限公司 | The power switch device of breaker outlet loop |
| CN109599279B (en) * | 2018-12-29 | 2024-03-22 | 国家电网有限公司 | Control device of circuit breaker |
| CN110148545B (en) * | 2019-06-20 | 2024-04-26 | 吉林永大电气开关有限公司 | Emergency brake-separating time-delay restarting device of permanent magnet circuit breaker |
| CN113315098A (en) * | 2021-06-04 | 2021-08-27 | 贵州电网有限责任公司 | Control circuit for preventing breaker tripping coil from being burnt |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0255518A (en) * | 1988-08-19 | 1990-02-23 | Mitsubishi Electric Corp | Circuit breaker |
| CN201796825U (en) * | 2010-09-19 | 2011-04-13 | 鞍钢股份有限公司 | Circuit of switching-on tripping coil of anti-burning circuit breaker |
| CN202855675U (en) * | 2012-10-15 | 2013-04-03 | 江苏省如高高压电器有限公司 | Apparatus for protecting circuit breaker coil |
| CN203481154U (en) * | 2013-08-02 | 2014-03-12 | 北京工业大学 | Device for preventing circuit breaker coils from being burnt |
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2013
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Granted publication date: 20160113 Termination date: 20160802 |