CN202231402U - Protection circuit of vacuum circuit breaker in under-voltage and no-voltage states - Google Patents
Protection circuit of vacuum circuit breaker in under-voltage and no-voltage states Download PDFInfo
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- CN202231402U CN202231402U CN2011203456747U CN201120345674U CN202231402U CN 202231402 U CN202231402 U CN 202231402U CN 2011203456747 U CN2011203456747 U CN 2011203456747U CN 201120345674 U CN201120345674 U CN 201120345674U CN 202231402 U CN202231402 U CN 202231402U
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Abstract
The utility model discloses a protection circuit of a vacuum circuit breaker in under-voltage and no-voltage states. The protection circuit comprises an under-voltage and no-voltage circuit board BRT, wherein an under-voltage and no-voltage release DT1, an under-voltage and no-voltage locking electromagnet DT2 and an auxiliary switch QF are connected on the under-voltage and no-voltage circuit board BRT. The protection circuit of the vacuum circuit breaker in under-voltage and no-voltage states is characterized in that the under-voltage and no-voltage locking electromagnet DT2 is provided with two micro-switches J1 and J2; the micro-switch J1 is serially connected with the under-voltage and no-voltage release DT1 in an under-voltage and no-voltage loop; and the micro-switch J2 is serially connected with a closing coil HQ in a closing loop. With the adoption of the circuit structure, the circuit has the advantages as follows: 1, the protection circuit ensures that the vacuum breaker can be automatically switched off and cut off power supply of the closing loop in the under-voltage and no-voltage states, so as to avoid burning up the closing coil; 2, compared with the prior art, only one group of the micro-switches are added so as to achieve low production cost; 3, the protection circuit in the utility model has small changes so as to be suitable for the improvement on the basis of the existing product.
Description
Relate to the field
The utility model relates to vacuum circuit-breaker, the protective circuit of particularly a kind of vacuum circuit-breaker under under-voltage decompression state.
Background technology
Vacuum circuit-breaker because of its arc-extinguishing medium and arc extinguishing after the dielectric in contact gap all be that high vacuum is gained the name.And because of its have volume little, in light weight, be applicable to advantage that frequent operation, arc extinguishing need not overhaul in power distribution network by widespread usage.
Vacuum circuit-breaker is in the process of using, and sometimes owing to reasons such as short troubles, the phenomenon that reduces significantly even disappear can appear in line voltage distribution at short notice.It brings damage can for circuit and electric equipment.For example tiredly fall, during stall, generation be several times as much as the overcurrent of rated current, burn out motor at motor; When voltage recovered, the self-starting of a large amount of motor can make the voltage of motor descend significantly again, works the mischief.This just requires when under-voltage, decompression phenomenon occurring, and vacuum circuit-breaker can effectively be cut off the electricity supply, and prevents the generation that endangers.
Existing vacuum circuit-breaker is when under-voltage, decompression phenomenon occurring, though can make and the vacuum circuit-breaker closing coil can often occur breaker open operation and burn phenomenon.That is that its closing circuit still is in "on" position because the under-voltage decompression electromagnet in the circuit breaker when under-voltage decompression, mechanically can not close a floodgate though guaranteed circuit breaker, and this just causes closing coil because of long-time electric burning.
To above-mentioned problem, a kind of protective circuit of vacuum circuit-breaker is provided, make it can under the state of under-voltage decompression, make breaker open operation and cut off the closing circuit power supply automatically.
The utility model content
The utility model technical problem to be solved is, the protective circuit of a kind of vacuum circuit-breaker under under-voltage decompression state is provided, and makes it can under the state of under-voltage decompression, make breaker open operation and cut off the closing circuit power supply automatically.
For achieving the above object; The technical scheme of the utility model is; The protective circuit of a kind of vacuum circuit-breaker under under-voltage decompression state; Comprise being connected with under-voltage no-voltage release DT1, under-voltage decompression locking electromagnet DT2, auxiliary switch QF on the under-voltage decompression wiring board BRT, it is characterized in that: described under-voltage decompression locking electromagnet DT2 is provided with two sensitive switch J1, J2, and sensitive switch J1 connects with under-voltage no-voltage release DT1 in the under-voltage decompression loop; Sensitive switch J2 connects with closing coil HQ in the closing circuit; When under-voltage decompression ring current is lower than 35%VN; The push rod resile of under-voltage decompression locking electromagnet DT2 makes under-voltage no-voltage release DT1 discharge the circuit breaker automatic brake separating; And break off the power supply of closing circuit, realize that the two of vacuum circuit-breaker cut off.
Described sensitive switch J1 inserts under-voltage decompression loop for normal opened contact under the situation of no under-voltage decompression.
Described sensitive switch J2 inserts closing circuit for normally closed contact under the situation of no under-voltage decompression.
Described auxiliary switch QF is a normally closed contact under the breaker closing situation, inserts under-voltage decompression loop; Under the breaker open operation situation,, operate on it the realization breaking-closing operating for normally-closed contact inserts closing circuit.
The protective circuit of a kind of vacuum circuit-breaker under under-voltage decompression state; Owing to adopt the foregoing circuit structure; This circuit has the following advantages: guarantee that 1, vacuum circuit-breaker can make breaker open operation and cut off the closing circuit power supply automatically under the state of under-voltage decompression, avoid closing coil to burn; 2, prior art only increases by one group of sensitive switch relatively, and production cost is lower; 3, change lessly, be adapted at improving on the basis of existing product.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation;
Fig. 1 is the closing circuit circuit diagram of the protective circuit of a kind of vacuum circuit-breaker of the utility model under under-voltage decompression state;
Fig. 2 is the under-voltage decompression loop circuit figure of the protective circuit of a kind of vacuum circuit-breaker of the utility model under under-voltage decompression state;
Fig. 3 is a closing circuit circuit diagram of the prior art;
Embodiment
The utility model comprises and is connected with under-voltage no-voltage release DT1, under-voltage decompression locking electromagnet DT2, auxiliary switch QF on the under-voltage decompression wiring board BRT; Under-voltage decompression locking electromagnet DT2 is provided with two sensitive switch J1, J2, and sensitive switch J1 connects with under-voltage no-voltage release DT1 in the under-voltage decompression loop; Sensitive switch J2 connects with closing coil HQ in the closing circuit; When under-voltage decompression ring current is lower than 35%VN; The push rod resile of under-voltage decompression locking electromagnet DT2 makes under-voltage no-voltage release DT1 discharge the circuit breaker automatic brake separating; And break off the power supply of closing circuit, realize that the two of vacuum circuit-breaker cut off.
Sensitive switch J1 inserts under-voltage decompression loop for normal opened contact under the situation of no under-voltage decompression; Sensitive switch J2 inserts closing circuit for normally closed contact under the situation of no under-voltage decompression; Auxiliary switch QF is a normally closed contact under the breaker closing situation, inserts under-voltage decompression loop; Under the breaker open operation situation,, operate on it the realization breaking-closing operating for normally-closed contact inserts closing circuit.
The utility model is at the connect normally closed contact of under-voltage no-voltage dead locking electromagnet DT2 of the closing circuit of vacuum circuit-breaker.When vacuum circuit-breaker is in service position, energy storage, "on" position; When if under-voltage decompression ring current is lower than 35%VN; The push rod resile of under-voltage no-voltage dead locking electromagnet DT2, originally the sensitive switch J1 on the electromagnet is by switching to normally closed point normal battle, and the electric capacity on the under-voltage decompression wiring board BRT discharges to under-voltage no-voltage release DT1; Make the circuit breaker automatic brake separating, at this time circuit breaker mechanically can't close a floodgate; Originally the sensitive switch J2 on the electromagnet switches to normal battle by normally closed point; Because J2 is that string is in the closing circuit of circuit breaker; When under-voltage decompression loop voltage does not return to normal value; Closing circuit breaks off all the time, thereby has fundamentally avoided when under-voltage decompression phenomenon appears in circuit breaker, and the breaker closing coil can burn phenomenon.
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 (4)
1. the protective circuit of a vacuum circuit-breaker under under-voltage decompression state; Comprise and be connected with under-voltage no-voltage release (DT1), under-voltage decompression locking electromagnet (DT2), auxiliary switch (QF) on the under-voltage decompression wiring board (BRT); It is characterized in that: described under-voltage decompression locking electromagnet (DT2) is provided with two sensitive switches (J1, J2), and sensitive switch (J1) is connected with the under-voltage no-voltage release (DT1) in the under-voltage decompression loop; Sensitive switch (J2) is connected with the closing coil (HQ) in the closing circuit.
2. the protective circuit of a kind of vacuum circuit-breaker according to claim 1 under under-voltage decompression state is characterized in that: described sensitive switch (J1) inserts under-voltage decompression loop for normal opened contact under the situation of no under-voltage decompression.
3. the protective circuit of a kind of vacuum circuit-breaker according to claim 1 under under-voltage decompression state is characterized in that: described sensitive switch (J2) inserts closing circuit for normally closed contact under the situation of no under-voltage decompression.
4. the protective circuit of a kind of vacuum circuit-breaker according to claim 1 under under-voltage decompression state is characterized in that: auxiliary switch QF is normally closed contact under the breaker closing situation, insert under-voltage decompression loop; Under the breaker open operation situation, insert closing circuit for normally-closed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203456747U CN202231402U (en) | 2011-09-15 | 2011-09-15 | Protection circuit of vacuum circuit breaker in under-voltage and no-voltage states |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203456747U CN202231402U (en) | 2011-09-15 | 2011-09-15 | Protection circuit of vacuum circuit breaker in under-voltage and no-voltage states |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202231402U true CN202231402U (en) | 2012-05-23 |
Family
ID=46081976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203456747U Expired - Fee Related CN202231402U (en) | 2011-09-15 | 2011-09-15 | Protection circuit of vacuum circuit breaker in under-voltage and no-voltage states |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202231402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958437A (en) * | 2016-07-20 | 2016-09-21 | 攀钢集团西昌钢钒有限公司 | Control circuit for achieving decompression tripping of circuit breaker through external loop |
-
2011
- 2011-09-15 CN CN2011203456747U patent/CN202231402U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958437A (en) * | 2016-07-20 | 2016-09-21 | 攀钢集团西昌钢钒有限公司 | Control circuit for achieving decompression tripping of circuit breaker through external loop |
| CN105958437B (en) * | 2016-07-20 | 2018-06-12 | 攀钢集团西昌钢钒有限公司 | Realize the control circuit of breaker decompression tripping in external circuit |
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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: 20120523 Termination date: 20140915 |
|
| EXPY | Termination of patent right or utility model |