CN203481154U - Device for preventing circuit breaker coils from being burnt - Google Patents
Device for preventing circuit breaker coils from being burnt Download PDFInfo
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- CN203481154U CN203481154U CN201320469488.3U CN201320469488U CN203481154U CN 203481154 U CN203481154 U CN 203481154U CN 201320469488 U CN201320469488 U CN 201320469488U CN 203481154 U CN203481154 U CN 203481154U
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Abstract
The utility model provides a device for preventing circuit breaker coils from being burnt, and when a 35KV power system and a 10KV power system are operated and a line fault is switched off or switched on, a 3SJ delayed switching-off circuit is ensured to start simultaneously by utilization of the device when a circuit breaker switching-off or switching-on circuit is started normally. If switching of a circuit breaker becomes normal in 3 seconds, a 3SJ time relay is automatically returned by loss of excitation without influencing normal operation of the circuit breaker. After 3 seconds, a normally open contact of the 3SJ time relay is closed to start a 3ZJ intermediate relay, a 3ZJ normally closed contact is opened, the circuit breaker switching-off and switching-on circuits are switched off by the 3ZJ normally closed contact, and therefore burnout probability of the circuit breaker coils can be decreased. The delayed switching-off circuit is directly started after the circuit breaker normally closed contact and the normally open contact are in series connection additionally, so that the circuit breaker switching-off and switching-on coils can be protected.
Description
technical field
The utility model provides a kind of and has prevented that breaker coil from burning device, belongs 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 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 be refused deciliter; It is improper that 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 circuit breaker tripping coil to burn.Once there is tripping coil, burn, certainly will cause line outage, occur few power transmission and the consequence of power transmission in time, thereby greatly affect power supply reliability, thus effectively strengthen circuit breaker tripping coil employ all means available imperative.
Summary of the invention
The utility model provides a kind of and has prevented that breaker coil from burning device, in the control loop of original 35KV and 10KV electric power system, increase a circuit breaker dynamic circuit breaker and make contact and start loop and a time delay cutoff circuit when simultaneously closed, 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 circuit breaker failure signal simultaneously.Further circuit breaker failure is checked again, eliminate after fault, recover normally operation.
the utility model is disclosed a kind ofly prevents that breaker coil from burning device, is characterized in that:
By closing circuit of circuit breaker, circuit breaker trip loop, time delay cutoff circuit, auxiliary contact, changing improper loop 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 after the 2HJ1 parallel connection of reclosing contact, form and connect with the break contact KCF2 of the anti-relay that jumps, 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 is connected in power supply FU after connecting with tripping position relay TWJ coil anodal.
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, connect with the anti-relay K CF coil that jumps, 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 is connected in power supply FU after connecting with closing operation position relay HWJ coil anodal.
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 utility model is as follows:
When circuit breaker closes a floodgate or trip, when starting tripping operation or closing circuit, start another time delay cutoff circuit 3KT.As breaker mechanism switches correctly, after circuit breaker switches normally, adopt position relay voltage divider principle that time-delay relay 3KT loss of excitation is returned.As incorrect in circuit breaker switching, until timing circuit 3KT relay excitation, after 3 seconds, its time delay make contact is closed, and 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 object of cut-off breaker tripping operation and closing circuit.The 2nd, it is improper in auxiliary switch for circuit breaker position, to adjust, while there is the phenomenon of auxiliary switch dynamic circuit breaker and make contact while closure, the series loop being 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 is closed, 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 utility model is:
In 35KV and 10KV electric power system, operate and line fault tripping operation or while closing a floodgate, utilize this device can guarantee, when starting normal circuit breaker trip 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 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, 3ZJ break contact is opened, there are the tripping operation of 3ZJ break contact cut-off breaker and closing circuit, thereby realize 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 that causes tripping coil to burn higher simultaneously; this device spy sets up by directly starting time delay cutoff circuit after circuit breaker dynamic circuit breaker and make contact series connection, plays the object of protective circuit breaker tripping operation and closing coil.
Accompanying drawing explanation
Fig. 1 is the utility model logic diagram;
Fig. 2 is the utility model device circuit schematic diagram;
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; FU-power supply; KOM-protects 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; 3KT-time relay coil; 3KT1-time delay make contact; 3ZJ-auxiliary relay coil; QF3-circuit breaker break contact; QF4-circuit breaker make contact.
embodiment:
Shown in Fig. 1, the utility model is realized when circuit breaker closes a floodgate or trip, and when starting tripping operation or closing circuit, starts another time delay cutoff circuit 3KT.As breaker mechanism switches correctly, after circuit breaker switches normally, adopt position relay voltage divider principle that time-delay relay 3KT loss of excitation is returned.As incorrect in circuit breaker switching, until timing circuit 3KT relay excitation, after 3 seconds, its time delay make contact is closed, and 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 object of cut-off breaker tripping operation and closing circuit.Simultaneously improper in order to prevent the adjustment of auxiliary switch for circuit breaker position, 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 being formed by 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 is closed, 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, the utility model device is mainly by closing circuit of circuit breaker, circuit breaker trip loop, and 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 after the ZHJ1 parallel connection of reclosing contact, form and connect with the break contact KCF2 of the anti-relay that jumps, 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 is connected in positive source 1 after connecting with tripping position relay TWJ coil.
While carrying out reclosing after adopting control switch SA combined floodgate or line tripping, control switch SA 5. with the SA 8. closing of contact or the reclosing ZHJ1 closing of contact, realize following two functions: the one, make sending closing pulse to the series loop being formed by 3ZJ1 contact, QF1 contact, LC coil, realize breaker closing.The 2nd, start 3KT time relay coil.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.The effect that 3R connects with TWJ coil and plays dividing potential drop and prevent TWJ coil burnout.
circuit breaker trip loop:
Device is by breaker control switch S A, and protection exit relay contact KOM, prevents 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, connect with the relay K CF coil of preventing jumping, 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 is connected in positive source 1 after connecting with closing operation position relay HWJ coil.
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, to the series loop being formed by 3ZJ2 contact, QF2 contact, LT coil, send tripping operation pulse and make, realize circuit breaker trip.The 3rd, start 3KT coil.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.The effect that 43R connects with HWJ coil and plays dividing potential drop and prevent 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.In order to ensure the normal tripping operation of circuit breaker or contract mechanism machinery, 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 respectively positive source 1 and negative pole 2 with after the series connection of auxiliary relay 3ZJ coil.
When circuit breaker trips or during contract, realize following two functions, the one, tripping operation is sent out in the trip(ping) circuit being composed in series to the closing circuit being composed in series by 3ZJ1, QF1, LC or 3ZJ2, QF2, LT or closing pulse makes, 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 3KT coil dividing potential drop, 3KT coil loss of excitation is returned.After the 2nd, 3KT coil magnetization starts, as incorrect in circuit breaker breaker tripping and closing switching within 3 second time, after 3 seconds, its make contact 3KT1 is closed, starts 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 being comprised of QF3 and QF4 starts 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 (1)
1. prevent that breaker coil from burning a device, it is characterized in that: by closing circuit of circuit breaker, circuit breaker trip loop, auxiliary contact change improper startup loop, 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 is connected in 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 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, connect with the relay coil KCF that prevents jumping, 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 is connected in positive source FU1 after connecting with closing operation position relay coil HWJ;
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 3ZJ1 one end of auxiliary relay is serially connected with in closing circuit of circuit breaker, and an end is connected to tripping position relay coil TWJ;
Break contact 3ZJ2 one end of auxiliary relay is serially connected with in circuit breaker trip loop, and an end is connected to closing operation position relay coil HWJ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469488.3U CN203481154U (en) | 2013-08-02 | 2013-08-02 | Device for preventing circuit breaker coils from being burnt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469488.3U CN203481154U (en) | 2013-08-02 | 2013-08-02 | Device for preventing circuit breaker coils from being burnt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203481154U true CN203481154U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320469488.3U Expired - Fee Related CN203481154U (en) | 2013-08-02 | 2013-08-02 | Device for preventing circuit breaker coils from being burnt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203481154U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426695A (en) * | 2013-08-02 | 2013-12-04 | 北京工业大学 | Method and device for preventing circuit breaker coil from burning |
| CN103839702A (en) * | 2014-03-27 | 2014-06-04 | 莱芜钢铁集团有限公司 | Closing circuit of breaker |
| CN106298391A (en) * | 2016-10-25 | 2017-01-04 | 正泰电气股份有限公司 | A kind of switchgear tripping coil protection device |
| CN113160491A (en) * | 2021-04-07 | 2021-07-23 | 威胜电气有限公司 | Primary and secondary integration high-voltage charge control switching-on and switching-off control method |
-
2013
- 2013-08-02 CN CN201320469488.3U patent/CN203481154U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426695A (en) * | 2013-08-02 | 2013-12-04 | 北京工业大学 | Method and device for preventing circuit breaker coil from burning |
| CN103839702A (en) * | 2014-03-27 | 2014-06-04 | 莱芜钢铁集团有限公司 | Closing circuit of breaker |
| 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 |
| CN106298391A (en) * | 2016-10-25 | 2017-01-04 | 正泰电气股份有限公司 | A kind of switchgear tripping coil protection device |
| CN113160491A (en) * | 2021-04-07 | 2021-07-23 | 威胜电气有限公司 | Primary and secondary integration high-voltage charge control switching-on and switching-off control method |
| CN113160491B (en) * | 2021-04-07 | 2022-07-08 | 威胜电气有限公司 | Primary and secondary integration high-voltage charge control switching-on and switching-off control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140802 |
|
| EXPY | Termination of patent right or utility model |