CN202856319U - Protective circuit of circuit breaker energy storage motor - Google Patents
Protective circuit of circuit breaker energy storage motor Download PDFInfo
- Publication number
- CN202856319U CN202856319U CN 201220497567 CN201220497567U CN202856319U CN 202856319 U CN202856319 U CN 202856319U CN 201220497567 CN201220497567 CN 201220497567 CN 201220497567 U CN201220497567 U CN 201220497567U CN 202856319 U CN202856319 U CN 202856319U
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- energy storage
- circuit
- storage motor
- protective circuit
- relay
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Abstract
The utility model discloses a protective circuit of a circuit breaker energy storage motor. The protective circuit comprises an energy storage microswitch S1, an energy storage motor M and a bridge rectifier circuit V1. The circuit is characterized in that a coil of a time delay relay KT and a group of contacts of a middle relay KM are in series connection and then are in parallel connection with the microswitch S1, the energy storage motor M and the bridge rectifier circuit V1. A group of contacts of the time delay relay KT are in series connection with a working circuit of the energy storage motor. The middle relay KM and the microswitch S1 are in series connection and then are in parallel connection with the whole circuit. Since the above circuit structure is employed, the protective circuit has the following advantages: (1) when a circuit breaker transmission mechanism shows a jam phenomenon or transmission is not in place, an electric circuit of the energy storage motor is automatically disconnected to protect the energy storage motor; (2) the protective circuit has the advantages of simple structure and easy realization; (3) the increase of excessive cost is not needed, and an improvement is carried out based on an existing circuit.
Description
Technical field
The utility model relates to vacuum circuit-breaker, particularly a kind of protective circuit of breaker energy storage motor.
Background technology
AC high voltage vacuum breaker is as major control in the electric power system and protection equipment; reliability is high, cut-off that capacity is large, the time between overhauls(TBO) long, pollution-free, without explosion hazard, be fit to the series of advantages such as frequent operation, all obtained more and more widely application in every field such as power industry, industrial and mining enterprises, railway transportations.Also just because of its these advantages, the operating mechanism reliable in action of the sky circuit breaker inside of also will looking for the truth, mechanical endurance is long, is fit to frequent operation etc.For the machinery that guarantees product and electric reliability, before dispatching from the factory, every circuit breaker all needs to carry out 300 running-in tests operations.
But carry out in the process of 300 running-in tests at vacuum circuit-breaker, the situation generation that energy storage motor burns often can occur, increased the manufacturing cost of circuit breaker, affect the delivery date of product.This mainly is because the bite phenomenon appears in driving gear of breaker or transmission is not in place, cause the pressing plate on the breaker energy storage axle not to be pressed onto the position, the energy storage sensitive switch does not switch, and causes the energy storage electric loop of circuit breaker to be in channel status always, energy storage motor is then always charged, causes burn-down of electric motor.
Improve in loop to existing energy storage motor, can protect energy storage motor is long charged, and this is the problem that prior art need to solve.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of protective circuit of breaker energy storage motor, to reach the long charged purpose of protecting of energy storage motor.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of protective circuit of breaker energy storage motor, comprise energy storage sensitive switch S1, energy storage motor M, bridge rectifier V1 is characterized in that: described protective circuit is in parallel with sensitive switch S1, energy storage motor M, bridge rectifier V1 after the winding point series connection of time delay relay KT coil and auxiliary relay KM; The winding point of time delay relay KT seals in the work loop of energy storage motor; The coil of auxiliary relay KM with incorporate whole loop into after sensitive switch S1 connects, thereby realize protection to energy storage motor by adding time delay relay KT and auxiliary relay KM.
The winding point of described time delay relay KT is normally closed contact.
The winding point of described auxiliary relay KM is normally closed contact.
A kind of protective circuit of breaker energy storage motor, owing to adopt the foregoing circuit structure, this protective circuit has following advantage: 1, occur automatically cutting off the electric loop of energy storage motor in bite phenomenon or the transmission situation not in place at driving gear of breaker, it is protected; 2, simple in structure, be easy to realize; 3, need not to increase too much cost, can improve on the basis in existing loop.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;
Fig. 1 is the circuit diagram of the protective circuit of a kind of breaker energy storage motor of the utility model;
Fig. 2 is the circuit diagram of circuit breaker energy storage motor in the prior art;
Embodiment
As shown in Figure 1, the utility model comprises energy storage sensitive switch S1, energy storage motor M, bridge rectifier V1 is characterized in that: described protective circuit is in parallel with sensitive switch S1, energy storage motor M, bridge rectifier V1 after the winding point series connection of time delay relay KT coil and auxiliary relay KM; The winding point of time delay relay KT seals in the work loop of energy storage motor; The coil of auxiliary relay KM with incorporate whole loop into after sensitive switch S1 connects, thereby realize protection to energy storage motor by adding time delay relay KT and auxiliary relay KM.The winding point of time delay relay KT is normally closed contact; The winding point of auxiliary relay KM is normal opened contact.
Existing circuit breaker is under rated operational voltage: the energy storage time of circuit breaker is generally all in 15ms, the utility model utilizes this point at the normally closed contact of a time delay relay KT of the work loop of energy storage motor M series connection just, the individual auxiliary relay KM of normal string battle that draws at tank circuit simultaneously.So that after the work loop of breaker energy storage motor M reached 15ms conduction time, circuit breaker can cut off the work ring current automatically, then can avoid occurring the phenomenon that energy storage motor M burns.
Wherein, auxiliary relay KM contact operation principle is: coil electricity, moving iron core move adhesive under electromagnetic force, drive the moving contact action, make normally-closed contact separately, and normally opened contact is closed; Coil blackout, moving iron core drives moving contact and resets under the effect of spring.On-delay time relay KT operation principle is: coil electricity, and relay contact is changed by after setting the time, and normally-closed contact separates, and normally opened contact is closed, and during outage, coil discharges immediately.
The specific works principle of protective circuit is as follows: behind the breaker energy storage; sensitive switch S1 contact change-over is not in place in the work loop; energy storage motor M fails normal power down; the S1 that in like manner takes from the tank circuit sensitive switch also fails to convert to normally closed point normal battle; then auxiliary relay KM coil is not charged; thereby the normally closed point of auxiliary relay KM of connecting with time delay relay KT coil fails to change; then time delay relay KT coil is charged; through after the time that sets; the time delay relay KT normally closed contact of connecting with motor converts normal opened contact to, then makes the energy storage motor outage.
The method is simple and reliable, and is economical and practical, thereby guaranteed that better energy storage motor can be because of charged not burnt of normal time.
The above has carried out exemplary description to the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted technical solutions of the utility model to carry out; or directly apply to other occasion without improvement, all within protection range of the present utility model.
Claims (3)
1. the protective circuit of a breaker energy storage motor, comprise energy storage sensitive switch (S1), energy storage motor (M), bridge rectifier (V1) is characterized in that: described protective circuit is that the winding point series connection of time delay relay (KT) coil and auxiliary relay (KM) is rear with sensitive switch (S1), energy storage motor (M), (V1) is in parallel for bridge rectifier; The one winding point of time delay relay (KT) seals in the work loop of energy storage motor; The coil of auxiliary relay (KM) with incorporate whole loop into after sensitive switch (S1) is connected.
2. the protective circuit of a kind of breaker energy storage motor according to claim 1, it is characterized in that: a winding point of described time delay relay (KT) is normally closed contact.
3. the protective circuit of a kind of breaker energy storage motor according to claim 1, it is characterized in that: a winding point of described auxiliary relay (KM) is normally closed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497567 CN202856319U (en) | 2012-09-26 | 2012-09-26 | Protective circuit of circuit breaker energy storage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497567 CN202856319U (en) | 2012-09-26 | 2012-09-26 | Protective circuit of circuit breaker energy storage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856319U true CN202856319U (en) | 2013-04-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220497567 Expired - Fee Related CN202856319U (en) | 2012-09-26 | 2012-09-26 | Protective circuit of circuit breaker energy storage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856319U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384059A (en) * | 2013-07-08 | 2013-11-06 | 中国科学院等离子体物理研究所 | Vacuum circuit breaker energy storage motor protection circuit |
| CN104269828A (en) * | 2014-10-27 | 2015-01-07 | 江苏省电力公司常州供电公司 | Protective circuit for energy storage driving motor of high-voltage circuit-breaker |
| CN105551842A (en) * | 2015-12-08 | 2016-05-04 | 国网上海市电力公司 | Method and device for preventing failure of circuit breaker energy storage motor |
| CN105759180B (en) * | 2016-05-12 | 2019-05-17 | 国网辽宁省电力有限公司抚顺供电公司 | Method of Cable Trouble Point is substantially discharged device |
-
2012
- 2012-09-26 CN CN 201220497567 patent/CN202856319U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384059A (en) * | 2013-07-08 | 2013-11-06 | 中国科学院等离子体物理研究所 | Vacuum circuit breaker energy storage motor protection circuit |
| CN103384059B (en) * | 2013-07-08 | 2016-08-10 | 中国科学院等离子体物理研究所 | A kind of vacuum circuit breaker energy storage motor protection circuit |
| CN104269828A (en) * | 2014-10-27 | 2015-01-07 | 江苏省电力公司常州供电公司 | Protective circuit for energy storage driving motor of high-voltage circuit-breaker |
| CN104269828B (en) * | 2014-10-27 | 2018-10-30 | 国网江苏省电力公司常州供电公司 | The protective loop of high-voltage circuitbreaker energy storage driving motor |
| CN105551842A (en) * | 2015-12-08 | 2016-05-04 | 国网上海市电力公司 | Method and device for preventing failure of circuit breaker energy storage motor |
| CN105759180B (en) * | 2016-05-12 | 2019-05-17 | 国网辽宁省电力有限公司抚顺供电公司 | Method of Cable Trouble Point is substantially discharged device |
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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: 20130403 Termination date: 20160926 |
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| CF01 | Termination of patent right due to non-payment of annual fee |