CN103426695A - Method and device for preventing circuit breaker coil from burning - Google Patents
Method and device for preventing circuit breaker coil from burning Download PDFInfo
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- CN103426695A CN103426695A CN2013103335125A CN201310333512A CN103426695A CN 103426695 A CN103426695 A CN 103426695A CN 2013103335125 A CN2013103335125 A CN 2013103335125A CN 201310333512 A CN201310333512 A CN 201310333512A CN 103426695 A CN103426695 A CN 103426695A
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Abstract
The invention provides a method and a device for preventing a circuit breaker coil from burning. By means of the device for preventing the circuit breaker coil from burning, a 3SJ delayed open loop is simultaneously started when a normal circuit breaker tripping or closing loop is started during operation and line fault tripping or closing in 35 kV and 10kV power systems. The switching of a circuit breaker can be normal in 3 seconds, a 3 SJ time relay automatically loses excitation and returns, and the normal operation of the circuit breaker is not affected. After 3 seconds, the delayed normally open contact of the 3 SJ time relay is closed to start a 3 ZJ intermediate relay, a 3 ZJ normally closed contact is opened, the 3 ZJ normally closed contact opens the circuit breaker tripping and closing loops, and accordingly the probability of circuit breaker coil burning can be reduced. According to the method and the device for preventing the circuit breaker coil from burning, the delayed open loop is directly started after the normally closed contact and the normally open contact of the circuit break are connected in series, so that the aim of protecting circuit breaker tripping and closing coils is achieved.
Description
Technical field
The invention provides a kind of method that prevents that breaker coil from burning, solve the problem that tripping coil burns, also provide simultaneously and realized that the method specifically installs, 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 burn phenomenon and happen occasionally, and its reason is that existing circuit breaker tripping coil, all by short time energising design, when the trip electromagnet fault occurring, causes the iron core top not absolve buckle mechanism; The interior conducting rod of breaker body, kinematic link are stuck, cause iron core to be refused deciliter; It is improper that the auxiliary switch position is adjusted, and occurs that normally opened contact and normally-closed contact are simultaneously closed; The long-term self-sustaining of remote control trip(ping) circuit etc. all forms the long-time energising of tripping coil and causes the circuit breaker tripping coil to burn.Burn once tripping coil occurs, certainly will cause line outage, few power transmission and the consequence of power transmission in time occur, thereby greatly affect power supply reliability, thus effectively strengthen the circuit breaker tripping coil employ all means available imperative.
Summary of the invention
The invention provides a kind of method that prevents that breaker coil from burning, start loop and a time delay cutoff circuit when increase by one circuit breaker dynamic circuit breaker and make contact while are closed in the control loop of original 35KV and 10KV electric power system, it is improper that realization can not normally be tripped at circuit breaker, combined floodgate or auxiliary switch for circuit breaker position are adjusted, while occurring that circuit breaker dynamic circuit breaker and make contact while are closed, cut-off breaker tripping operation and closing circuit send the circuit breaker failure signal simultaneously.Further circuit breaker failure is checked again, after eliminating fault, recovered normally operation.
The method that prevents that breaker coil from burning provided by the invention, its technical solution is as follows:
Comprise that closing circuit, trip(ping) circuit, auxiliary contact switch improper startup loop, time delay cutoff circuit.
It is improper in the auxiliary switch for circuit breaker position, to adjust, while the phenomenon of auxiliary switch dynamic circuit breaker and make contact while closure occurring, the series loop relay start-up time 3KT time delay cutoff circuit formed by break contact and the make contact of circuit breaker, until time-delay relay 3KT excitation after 3 seconds, its time delay make contact closure, 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 of the present inventionly preventing that breaker coil from burning the device of method, is characterized in that:
A closing circuit of circuit breaker:
While after adopting control switch SA combined floodgate or line tripping, carrying out reclosing, control switch SA 5. with the SA 8. closing of contact or the reclosing ZHJ1 closing of contact: send the closing pulse order in the series loop to being formed by 3ZJ1 contact, QF1 contact, LC coil, realize breaker closing; Start the 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: start the anti-relay K CF coil that jumps, its break contact KCF2 opens, and disconnects closing circuit; Send tripping operation pulse order to the series loop formed by 3ZJ2 contact, QF2 contact, LT coil, realize circuit breaker trip; Start the 3KT coil.
A time delay cutoff circuit:
When circuit breaker is tripped or during contract; 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 is correct to close a floodgate or tripping operation (complete the switching of breaker tripping and closing machinery and normally should be less than 2 seconds), will realize by 4R and HWJ or 3R and TWJ to 3KT coil dividing potential drop, 3KT coil loss of excitation being returned; After the 3KT coil magnetization starts, as incorrect as circuit breaker breaker tripping and closing switching within 3 second time, its make contact 3KT1 closure after 3 seconds, start the 3ZJ coil, its break contact 3ZJ1 and 3ZJ2 cut-off breaker closing circuit and trip(ping) circuit.
Auxiliary contact are changed improper loop
When circuit breaker trip or combined floodgate, when occurring that its dynamic circuit breaker and make contact are connected simultaneously, QF3 and QF4 are all closed, the series loop be comprised of QF3 and QF4 starts the 3KT coil, its time delay make contact 3KT1 is the closed 3ZJ coil that starts after 3 seconds, by 3ZJ1 and 3ZJ2 break contact cut-off breaker closing circuit and trip(ping) circuit.Send circuit breaker switch failure signal simultaneously.
Disclosed by the inventionly a kind ofly prevent that breaker coil from burning device, is characterized in that:
Changing improper loop by closing circuit of circuit breaker, circuit breaker trip loop, time delay cutoff circuit, auxiliary contact forms; 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 form; The contact of breaker control switch S A with form and connect with the break contact KCF2 of the anti-relay that jumps after the 2HJ1 parallel connection of reclosing contact, be connected to power supply FU positive pole and tripping position relay TWJ coil; The break contact 3ZJ1 of auxiliary relay forms and connects with circuit breaker break contact QF1 and breaker closing contactor coil LC, is connected to power supply FU negative pole and tripping position relay TWJ coil; Divider resistance 3R be connected in power supply FU positive pole after tripping position relay TWJ coil is connected.
2) circuit breaker trip loop:
By breaker control switch S A, protection exit relay contact KOM, the anti-relay K CF coil that jumps, the break contact 3ZJ2 of auxiliary relay, circuit breaker make contact QF2, circuit breaker trip coil LT and closing operation position relay HWJ coil and 4R resistance form; Breaker control switch S A contact with after protection exit relay contact KOM parallel connection, with the anti-relay K CF coil that jumps, connect, be connected to power supply FU positive pole and closing operation position relay HWJ coil; The break contact 3ZJ2 of auxiliary relay forms and connects with circuit breaker make contact QF2 and circuit breaker trip coil LT, is connected to power supply FU negative pole and closing operation position relay HWJ coil; Divider resistance 4R be connected in power supply FU positive pole after closing operation position relay HWJ coil is connected;
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 respectively power supply FU positive pole and negative pole with after the series connection of auxiliary relay 3ZJ coil, and described time relay 3KT is provided with the time delay of 3 seconds;
4) auxiliary contact are changed improper loop:
By a pair of break contact QF3 of circuit breaker and make contact QF4, be composed in series; 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 is closed a floodgate or trip, when starting tripping operation or closing circuit, start another time delay cutoff circuit 3KT.As correct as the breaker mechanism switching, after the circuit breaker switching is normal, adopt the position relay voltage divider principle that time-delay relay 3KT loss of excitation is returned.As incorrect as circuit breaker switching, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closure, this contact starts auxiliary relay 3ZJ coil, and its break contact is opened.Because two couples of break contact 3ZJ1 of 3ZJ and 3ZJ2 are serially connected with in circuit breaker trip and closing circuit, thereby realize the purpose of cut-off breaker tripping operation and closing circuit.The 2nd, it is improper in the auxiliary switch for circuit breaker position, to adjust, while the phenomenon of auxiliary switch dynamic circuit breaker and make contact while closure occurring, the series loop be comprised 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 closure, 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:
Operate and line fault tripping operation or while closing a floodgate in 35KV and 10KV electric power system, utilize this device can guarantee to start 3SJ time delay cutoff circuit when starting normal circuit breaker trip or closing circuit simultaneously.As normal in the inner breaker switching of 3 second time, the automatic loss of excitation of the 3SJ time relay returns, and does not affect circuit breaker and normally moves.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, the closed 3ZJ auxiliary relay that starts of 3SJ time relay time delay make contact after 3 seconds, the 3ZJ break contact is opened, the tripping operation of 3ZJ break contact cut-off breaker and closing circuit are arranged, thereby realize reducing breaker coil, burn probability.Due to actual circuit breaker emerged in operation circuit breaker dynamic circuit breaker and make contact, to connect the probability that causes tripping coil to burn higher simultaneously; this device spy sets up by after circuit breaker dynamic circuit breaker and make contact series connection, directly starting the time delay cutoff circuit, plays the purpose of protective circuit breaker tripping operation and closing coil.
The 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; The break contact of the anti-relay that jumps of KCF2-; The break contact of 3ZJ1-auxiliary relay; QF1-circuit breaker break contact; LC-breaker closing contactor coil; TWJ-tripping position relay coil; 3R-resistance; The FU-power supply; KOM-protects the exit relay contact; The anti-relay coil that jumps of KCF-, the break contact of 3ZJ2-auxiliary relay; QF2-circuit breaker make contact; LT-circuit breaker trip coil; HWJ-closing operation position relay coil; 4R-resistance; The 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 that the present invention has been carried out to detailed discussion, and this description belongs to illustrative but not be determinate, outside this, also can enumerate several examples, therefore in the modification do not broken away under general plotting of the present invention, within should belonging to protection scope of the present invention.
Embodiment 1
Shown in Fig. 1, the present invention realizes when circuit breaker is closed a floodgate or trip, and when starting tripping operation or closing circuit, starts another time delay cutoff circuit 3KT.As correct as the breaker mechanism switching, after the circuit breaker switching is normal, adopt the position relay voltage divider principle that time-delay relay 3KT loss of excitation is returned.As incorrect as circuit breaker switching, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closure, this contact starts auxiliary relay 3ZJ coil, and its break contact is opened.Because two couples of break contact 3ZJ1 of 3ZJ and 3ZJ2 are serially connected with in circuit breaker trip and closing circuit, thereby realize the purpose of cut-off breaker tripping operation and closing circuit.Simultaneously improper in order to prevent the adjustment of auxiliary switch for circuit breaker position, auxiliary switch dynamic circuit breaker and make contact closed phenomenon of burning circuit breaker trip and closing coil simultaneously appears, be provided with the series loop formed by circuit breaker break contact and make contact and start the 3KT timing circuit, until timing circuit 3KT relay excitation after 3 seconds, its time delay make contact closure, start auxiliary relay 3ZJ coil, two pairs of break contacts of 3ZJ relay are opened, because two couples of break contact 3ZJ1 of 3ZJ and 3ZJ2 are serially connected with in circuit breaker trip and closing circuit, realize cut-off breaker tripping operation and closing circuit.
Shown in Fig. 2, apparatus of the present invention are mainly by closing circuit of circuit breaker, the circuit breaker trip loop, and the time delay cutoff circuit, auxiliary contact are changed improper loop and are formed; Wherein:
Closing circuit of circuit breaker:
Device is comprised of breaker control switch S A, reclosing outlet contact ZHJ1, 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.
The SA of breaker control switch 5. with SA 8. contact with form and connect with the break contact KCF2 of the anti-relay that jumps after the ZHJ1 parallel connection of reclosing contact, be connected to positive source and tripping position relay TWJ coil.The break contact 3ZJ1 of auxiliary relay forms and connects with circuit breaker break contact QF1 and breaker closing contactor coil LC, is connected to power cathode 2 and tripping position relay TWJ coil.Divider resistance 3R be connected in positive source 1 after tripping position relay TWJ coil is connected.
While after adopting control switch SA combined floodgate or line tripping, carrying out reclosing, control switch SA 5. with the SA 8. closing of contact or the reclosing ZHJ1 closing of contact, realize following two functions: the one, send the closing pulse order in the series loop to being formed by 3ZJ1 contact, QF1 contact, LC coil, realize breaker closing.The 2nd, start the 3KT time relay coil.The TWJ relay can be used for the circuit breaker trip position and monitors, can realize again the effect to LC coil dividing potential drop and 3KT coil dividing potential drop.The effect that 3R connects with the TWJ coil and plays dividing potential drop and prevent the TWJ coil burnout.
The circuit breaker trip loop:
Device is by breaker control switch S A, and protection exit relay contact KOM, prevent jumping relay K CF coil, auxiliary relay break contact 3ZJ2, and circuit breaker make contact QF2, circuit breaker trip coil LT and closing operation position relay HWJ coil and 4R resistance form.
The SA of breaker control switch 6. with SA 7. contact with after protection exit relay contact KOM parallel connection, with the relay K CF coil of preventing jumping, connect, be connected to positive source and closing operation position relay HWJ coil.The break contact 3ZJ2 of auxiliary relay forms and connects with circuit breaker make contact QF2 and circuit breaker trip coil LT, is connected to power cathode 2 and closing operation position relay HWJ coil.Divider resistance 4R be connected in positive source 1 after closing operation position relay HWJ coil is connected.
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: the one, start the anti-relay K CF coil that jumps, its break contact KCF2 opens, and disconnects closing circuit.The 2nd, send tripping operation pulse order to the series loop formed by 3ZJ2 contact, QF2 contact, LT coil, realize circuit breaker trip.The 3rd, start the 3KT coil.The HWJ relay can be used for the breaker closing position and monitors, can realize again the effect to LT coil dividing potential drop and 3KT coil dividing potential drop.The effect that 43R connects with the HWJ coil and plays dividing potential drop and prevent the HWJ coil burnout.
The time delay cutoff circuit:
Device is by time relay 3KT coil and time delay make contact thereof, and auxiliary relay 3ZJ coil forms.In order to ensure the normal tripping operation of circuit breaker or the machinery switching of contract mechanism, 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 respectively positive source 1 and negative pole 2 with after the series connection of auxiliary relay 3ZJ coil.
When circuit breaker is tripped or during contract, realize following two functions, the one, 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, as circuit breaker is correct, close a floodgate or tripping operation (complete the switching of breaker tripping and closing machinery 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.After the 2nd, 3KT coil magnetization starts, as incorrect as circuit breaker breaker tripping and closing switching within 3 second time, its make contact 3KT1 closure after 3 seconds, start the 3ZJ coil, its break contact 3ZJ1 and 3ZJ2 cut-off breaker closing circuit and trip(ping) circuit.
Auxiliary contact are changed improper loop:
Device is composed in series by a pair of break contact QF3 of circuit breaker 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.
When circuit breaker trip or combined floodgate, when occurring that its dynamic circuit breaker and make contact are connected simultaneously, QF3 and QF4 are all closed, the series loop be comprised of QF3 and QF4 starts the 3KT coil, its time delay make contact 3KT1 is the closed 3ZJ coil that starts after 3 seconds, by 3ZJ1 and 3ZJ2 break contact cut-off breaker closing circuit and trip(ping) circuit.Send circuit breaker switch failure signal simultaneously.
Claims (2)
1. a method that prevents that breaker coil from burning comprises the following steps:
Comprise that closing circuit of circuit breaker, circuit breaker trip loop, auxiliary contact change improper startup loop, time delay cutoff circuit:
1), when circuit breaker is closed a floodgate or trip, when starting trip(ping) circuit or closing circuit, start the time relay coil 3KT in another time delay cutoff circuit;
As correct as circuit breaker switching, after the circuit breaker switching is normal, adopt the resistance rear voltage divider principle of connecting with position relay that time relay coil 3KT time delay loss of excitation is returned;
As incorrect as the circuit breaker switching, until the time relay coil 3KT of timing circuit excitation, after 3 seconds, its time delay make contact 3KT1 closure, start auxiliary relay coil 3ZJ, and 3ZJ auxiliary relay break contact 3ZJ1 and 3ZJ2 open;
Because the two couples of break contact 3ZJ1 and the 3ZJ2 of auxiliary relay coil 3ZJ is serially connected with in the trip(ping) circuit and closing circuit of circuit breaker of circuit breaker, thereby realize the purpose of cut-off breaker tripping operation and closing circuit protective circuit breaker breaking coil and closing coil;
2) in circuit breaker operation or operation, when the phenomenon of circuit breaker break contact and circuit breaker make contact while closure occurring, the series loop relay coil start-up time 3KT time delay cutoff circuit formed by the make contact QF4 of the break contact QF3 of circuit breaker and circuit breaker, until time relay coil 3KT excitation after 3 seconds, its time delay make contact 3KT1 closure, start auxiliary relay coil 3ZJ, the two couples of break contact 3ZJ1 and the 3ZJ2 of 3ZJ relay open, cut-off breaker tripping operation and closing circuit of circuit breaker, realize the purpose of protective circuit breaker breaking coil and closing coil.
2. one kind prevents that breaker coil from burning device, is characterized in that: by closing circuit of circuit breaker, circuit breaker trip loop, auxiliary contact change improper startup loop, the time delay cutoff circuit forms; 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 3R resistance form; The closing contact of breaker control switch S A forms and connects with the break contact KCF2 of the anti-relay that jumps with after reclosing outlet contact ZHJ1 parallel connection, is connected to positive source FU1 and tripping position relay coil TWJ; The break contact 3ZJ1 of auxiliary relay forms and connects with circuit breaker break contact QF1 and breaker closing contactor coil LC, is connected to power supply FU2 negative pole and tripping position relay coil TWJ; Divider resistance 3R be connected in positive source FU1 after tripping position relay coil TWJ connects;
2) circuit breaker trip loop:
By breaker control switch S A, protection exit relay contact KOM, the anti-relay coil KCF that jumps, the break contact 3ZJ2 of auxiliary relay, circuit breaker make contact QF2, circuit breaker trip coil LT and closing operation position relay coil HWJ and resistance 4R form; Breaker control switch S A trip contact with after protection exit relay contact KOM parallel connection, with the relay coil KCF that prevents jumping, connect, be connected to positive source FU1 and closing operation position relay coil HWJ; The break contact 3ZJ2 of auxiliary relay forms and connects with circuit breaker make contact QF2 and circuit breaker trip coil LT, is connected to power cathode FU2 and closing operation position relay coil HWJ; Divider resistance 4R be connected in positive source FU1 after closing operation position relay coil HWJ connects;
3) auxiliary contact are changed improper startup loop
By a pair of break contact QF3 of circuit breaker and a pair of make contact QF4, be composed in series; Circuit breaker break contact QF3 is connected positive source FU1 and closing operation position relay HWJ coil with after circuit breaker make contact QF4 series connection;
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 HWJ coil and power cathode FU2; Time relay time delay make contact 3KT1 is connected respectively positive source FU1 and power cathode FU2 with after auxiliary relay coil 3ZJ series connection, and for guaranteeing 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 serially connected with in closing circuit of circuit breaker, and one is terminated at tripping position relay coil TWJ;
Break contact 3,ZJ2 mono-end of auxiliary relay is serially connected with in the circuit breaker trip loop, and one is terminated at 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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| CN103426695A true CN103426695A (en) | 2013-12-04 |
| CN103426695B CN103426695B (en) | 2016-01-13 |
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| CN201310333512.5A Expired - Fee Related CN103426695B (en) | 2013-08-02 | 2013-08-02 | A kind of prevent breaker coil from burning method and device |
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Cited By (6)
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| CN103839702A (en) * | 2014-03-27 | 2014-06-04 | 莱芜钢铁集团有限公司 | Closing circuit of 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 |
| CN106057595A (en) * | 2016-07-21 | 2016-10-26 | 华自科技股份有限公司 | Power switch device of breaker exit circuit |
| CN109599279A (en) * | 2018-12-29 | 2019-04-09 | 国家电网有限公司 | A kind of control device of breaker |
| CN110148545A (en) * | 2019-06-20 | 2019-08-20 | 吉林永大电气开关有限公司 | Device is moved in the delay of permanent-magnet breaker emergency opening again |
| 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 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103839702A (en) * | 2014-03-27 | 2014-06-04 | 莱芜钢铁集团有限公司 | Closing circuit of breaker |
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| CN109599279A (en) * | 2018-12-29 | 2019-04-09 | 国家电网有限公司 | A kind of control device of breaker |
| CN109599279B (en) * | 2018-12-29 | 2024-03-22 | 国家电网有限公司 | Control device of circuit breaker |
| CN110148545A (en) * | 2019-06-20 | 2019-08-20 | 吉林永大电气开关有限公司 | Device is moved in the delay of permanent-magnet breaker emergency opening again |
| 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 |
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| CN103426695B (en) | 2016-01-13 |
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