CN202260420U - Protection circuit for opening and closing coils - Google Patents
Protection circuit for opening and closing coils Download PDFInfo
- Publication number
- CN202260420U CN202260420U CN2011203787858U CN201120378785U CN202260420U CN 202260420 U CN202260420 U CN 202260420U CN 2011203787858 U CN2011203787858 U CN 2011203787858U CN 201120378785 U CN201120378785 U CN 201120378785U CN 202260420 U CN202260420 U CN 202260420U
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- Prior art keywords
- circuit
- coil
- divide
- closing
- shut brake
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Abstract
The utility model discloses a protection circuit for an opening and closing coil. The protection circuit comprises an auxiliary switch S1, an auxiliary switch QF, the closing coil HQ and the opening coil TQ, and is characterized in that: a coil protector XQB is connected in series with a closing loop consisting of the auxiliary switch S1 and the closing coil HQ, and is connected in series with an opening loop consisting of the auxiliary switch QF and the opening coil TQ. By the circuit structure, the circuit has the advantages that: 1, the opening and closing coils can be effectively prevented from being burnt out in a using process; 2, the coil protector XQB is connected in series with the conventional opening and closing loops, and the conventional circuit is relatively less changed; and 3, the operating reliability of an operating mechanism in a vacuum circuit breaker is improved, and the service life of the operating mechanism is prolonged.
Description
Technical field
The utility model relates to vacuum circuit-breaker, particularly a kind of protective circuit of divide-shut brake coil.
Background technology
AC high voltage vacuum breaker is as major control in the electric power system and protection equipment; Reliability is high, cut-off series of advantages such as capacity is big, the time between overhauls(TBO) long, pollution-free, no explosion hazard, suitable frequent operation, all obtained application more and more widely in every field such as power industry, industrial and mining enterprises, railway transportations.The inner operating mechanism of vacuum circuit-breaker has reliable in action, and mechanical endurance is long, is fit to frequent operation etc.
In existing vacuum circuit-breaker branch, the closing circuit, often there is the situation of divide-shut brake coil burnout to take place, brought a lot of troubles to relaying protection work.This phenomenon is mainly caused by following reason: 1, circuit breaker operation mechanism generation bite tripping; 2, auxiliary contact is because situation such as service time is of a specified duration, capacity is not enough, arcing cause auxiliary contact sticking dead; 3, not exclusively corresponding, the action mismate in auxiliary contact position and on off state position.More than these situation all can make the big electric current long duration of action of divide-shut brake in the divide-shut brake coil so that cause coil burnout, influence safe and reliable power supply.
Existing vacuum circuit-breaker divide-shut brake coil is improved, prevent that in use the divide-shut brake coil burnout is the problem that prior art need solve.
The utility model content
The utility model technical problem to be solved is a kind of protective circuit of divide-shut brake coil to be provided, to prevent divide-shut brake coil burnout in use.
For achieving the above object; The technical scheme of the utility model is; A kind of protective circuit of divide-shut brake coil; Comprise auxiliary switch S1, auxiliary switch QF, closing coil HQ, switching winding TQ, it is characterized in that: seal in coil protect device XQB in the closing circuit that described auxiliary switch S1 and closing coil HQ form; Seal in coil protect device XQB in the sub-gate circuit that auxiliary switch QF and switching winding TQ form, thereby when tripping takes place for circuit breaker operation mechanism or auxiliary switch etc., break off the divide-shut brake loop, the divide-shut brake coil is protected.
Described coil protect device XQB is that testing circuit detects the sub-switch circuit action, and improper actuating signal passed to starts timing circuit and carry out starting the action protection loop after timing, the timing and cut off sub-switch circuit, realizes the protection to the divide-shut brake loop.
Be provided with the monitoring indicator light in the described testing circuit, whether sub-switch circuit action is normally being shown in real time.
Described action protection is provided with auxiliary contact J1, J3 in the loop, to reach the effect of cutting off the divide-shut brake loop.
Be provided with warning circuit among the described coil protect device XQB, auxiliary contact J2, the closed warning circuit that starts of J4 can be realized the remote alarms function during sub-switch circuit remarkable action.
A kind of protective circuit of divide-shut brake coil, owing to adopt the foregoing circuit structure, this circuit has the following advantages: 1, can effectively must prevent divide-shut brake coil burnout in use; 2, in original divide-shut brake loop, seal in coil protect device XQB, change less original circuit; 3, improved reliability and useful life that the inner operating mechanism of vacuum circuit-breaker moves.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation;
Fig. 1 is the circuit diagram of the protective circuit of a kind of divide-shut brake coil of the utility model.
Embodiment
Existing circuit breaker is under rated operational voltage: opening time is generally between 20ms～50ms; Generally between 35ms～70ms, the divide-shut brake coil allows conduction time generally all in 100ms, if switching winding is above 50ms conduction time to closing time; Surpass closing coil conduction time 70ms; Can within 100ms, break off the divide-shut brake ring current, just can effectively protect the divide-shut brake coil, prevent that it from being burnt because of long charged.Coil protect device of series connection in original divide-shut brake loop is drawn the warning contact simultaneously according to this, and offering remote monitoring system can effectively protect the divide-shut brake coil.
The utility model comprises auxiliary switch S1, auxiliary switch QF, closing coil HQ, switching winding TQ, seals in coil protect device XQB in the closing circuit that wherein auxiliary switch S1 and closing coil HQ form; Seal in coil protect device XQB in the sub-gate circuit that auxiliary switch QF and switching winding TQ form, thereby when tripping takes place for circuit breaker operation mechanism or auxiliary switch etc., break off the divide-shut brake loop, the divide-shut brake coil is protected.
Coil protect device XQB is that testing circuit detects the sub-switch circuit action, and improper actuating signal passed to starts timing circuit and carry out starting the action protection loop after timing, the timing and cut off sub-switch circuit, realizes the protection to the divide-shut brake loop.
Be provided with the monitoring indicator light in the testing circuit, whether sub-switch circuit action is normally being shown in real time.Be provided with auxiliary contact J1, J3 in the action protection loop, to reach the effect of cutting off the divide-shut brake loop.Also be provided with warning circuit among the coil protect device XQB simultaneously, auxiliary contact J2, the closed warning circuit that starts of J4 can be realized the remote alarms function during sub-switch circuit remarkable action.
Coil protect device XQB mainly partly is made up of testing circuit, startup timing circuit, action protection loop etc.The course of work of the utility model is: coil protect device XQB presses winding diagram and inserts in the loop, and energising back power supply indicator is bright; During the circuit-breaker switching on-off operation, the monitoring indicator light is bright, and divide-shut brake loop regular event back light goes out, and protector is failure to actuate; If tripping, disjunction fault take place for circuit breaker operation mechanism or auxiliary switch etc., fault is not got rid of yet after setting time-delay, and protector starts latch-up protection, and coil protect device XQB auxiliary contact J1, J3 are broken off, and forces the broken coil electric current, and action indicator is bright; Can make simultaneously auxiliary contact J2, J4 closure, offer remote monitoring system warning contact, fault can reset by SR after getting rid of, and action indicator goes out, and protector gets into normal monitoring state again.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as the various improvement of having adopted the utility model technical scheme to carry out; Or directly apply to other occasion without improvement, all within the protection range of the utility model.
Claims (5)
1. the protective circuit of a divide-shut brake coil comprises auxiliary switch S1, auxiliary switch QF, closing coil HQ, switching winding TQ, it is characterized in that: seal in coil protect device XQB in the closing circuit that described auxiliary switch S1 and closing coil HQ form; Seal in coil protect device XQB in the sub-gate circuit that auxiliary switch QF and switching winding TQ form.
2. the protective circuit of a kind of divide-shut brake coil according to claim 1; It is characterized in that: described coil protect device XQB is that testing circuit detects the sub-switch circuit action, and improper actuating signal passed to starts timing circuit and carry out starting the action protection loop after timing, the timing and cut off sub-switch circuit.
3. the protective circuit of a kind of divide-shut brake coil according to claim 2 is characterized in that: be provided with the monitoring indicator light in the described testing circuit.
4. the protective circuit of a kind of divide-shut brake coil according to claim 2 is characterized in that: described action protection is provided with auxiliary contact J1, J3 in the loop.
5. the protective circuit of a kind of divide-shut brake coil according to claim 1 and 2 is characterized in that: be provided with warning circuit among the described coil protect device XQB, auxiliary contact J2, the closed warning circuit that starts of J4 during the sub-switch circuit remarkable action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203787858U CN202260420U (en) | 2011-10-08 | 2011-10-08 | Protection circuit for opening and closing coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203787858U CN202260420U (en) | 2011-10-08 | 2011-10-08 | Protection circuit for opening and closing coils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202260420U true CN202260420U (en) | 2012-05-30 |
Family
ID=46121605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203787858U Expired - Fee Related CN202260420U (en) | 2011-10-08 | 2011-10-08 | Protection circuit for opening and closing coils |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202260420U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879736A (en) * | 2012-10-16 | 2013-01-16 | 国家电网公司 | Automatic detection alarming protection device for opening and closing of circuit breaker |
| CN103022985A (en) * | 2012-12-07 | 2013-04-03 | 四川省电力公司内江电业局 | Protection device of closing coil |
| CN104300513A (en) * | 2014-09-23 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | Vacuum circuit breaker closing coil protector |
| CN109545633A (en) * | 2018-11-16 | 2019-03-29 | 深圳供电局有限公司 | A kind of permanent-magnet breaker |
-
2011
- 2011-10-08 CN CN2011203787858U patent/CN202260420U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879736A (en) * | 2012-10-16 | 2013-01-16 | 国家电网公司 | Automatic detection alarming protection device for opening and closing of circuit breaker |
| CN102879736B (en) * | 2012-10-16 | 2016-07-06 | 国网山东省电力公司广饶县供电公司 | Chopper on/off switch automatic detection warning protection device |
| CN103022985A (en) * | 2012-12-07 | 2013-04-03 | 四川省电力公司内江电业局 | Protection device of closing coil |
| CN104300513A (en) * | 2014-09-23 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | Vacuum circuit breaker closing coil protector |
| CN109545633A (en) * | 2018-11-16 | 2019-03-29 | 深圳供电局有限公司 | A kind of permanent-magnet breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20141008 |
|
| EXPY | Termination of patent right or utility model |