CN202230943U - Protection circuit for vacuum circuit breaker - Google Patents
Protection circuit for vacuum circuit breaker Download PDFInfo
- Publication number
- CN202230943U CN202230943U CN2011203456821U CN201120345682U CN202230943U CN 202230943 U CN202230943 U CN 202230943U CN 2011203456821 U CN2011203456821 U CN 2011203456821U CN 201120345682 U CN201120345682 U CN 201120345682U CN 202230943 U CN202230943 U CN 202230943U
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- Prior art keywords
- circuit
- energy storage
- storage motor
- breaker
- closing coil
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- Expired - Fee Related
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model discloses a protection circuit for a vacuum circuit breaker, comprising an energy storage motor M, a closing coil HQ, an opening coil TQ, an assistant switch S1 and an assistant switch QF. The protection circuit for a vacuum circuit breaker is characterized in that: the energy storage motor M, the closing coil HQ and the opening coil TQ are connected with a RC (resistor-capacitor) circuit in parallel respectively. Because of utilizing the circuit structure, the circuit has the following advantages that: 1, the back electromotive force of the vacuum circuit breaker during working is reduced, so that the adverse effects brought by the back electromotive force are avoided; 2, the too large transient current of the energy storage motor while starting is avoided, so that the whole circuit is protected; 3, the addition of a plurality of resistors and capacitors is only needed, so that improvement cost is low; and 4, the added resistors and capacitors are fixed by a direct-current circuit board, so that stability is high.
Description
Technical field
The utility model relates to vacuum circuit-breaker, particularly a kind of protective circuit of vacuum circuit-breaker.
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 back electromotive force in the process of using is very harmful to it, and back electromotive force generally appears in the solenoid, like relay coil, electromagnetically operated valve, contactor coil, motor, inductance etc.Generally, as long as exist in the electric equipment and element that electric energy and magnetic energy transforms, the moment in outage, all have back electromotive force, back electromotive force has many harm, controls badly, can damage electric component.
The internal electric element of existing vacuum circuit-breaker such as motor, switching winding, closing coil; Most of operating power all is a direct current, and closing coil and switching winding all be snap action, if user's operating power is a DC power supply; Just power supply is directly linked to each other with element; So the moment in that ring current breaks off can produce very strong back electromotive force, so just burn out the divide-shut brake coil easily.And the electric motor starting electric current is several times of running current, if user's increased operating frequency circuit breaker, motor can influence its useful life because of heating, also might be because electric current is excessive, and burn other electric component.
Reducing vacuum circuit-breaker back electromotive force at work, and avoid immediate current excessive, is the problem that prior art need solve to entire circuit protection.
The utility model content
The utility model technical problem to be solved is, a kind of protective circuit of vacuum circuit-breaker is provided, and reduces vacuum circuit-breaker back electromotive force at work to reach, and avoids immediate current excessive, the purpose that entire circuit is protected.
For achieving the above object; The technical scheme of the utility model is; A kind of protective circuit of vacuum circuit-breaker; Comprise energy storage motor M, closing coil HQ, switching winding TQ, auxiliary switch S1, auxiliary switch QF; It is characterized in that: described energy storage motor M, closing coil HQ, switching winding TQ are parallelly connected with a RC circuit respectively, thereby energy storage motor M, closing coil HQ, switching winding TQ are protected respectively, and immediate current is excessive when avoiding energy storage motor M to start produces back electromotive force with closing coil HQ, switching winding TQ when divide-shut brake.
Described RC circuit is that resistance R and capacitor C are in series, and is parallel to energy storage motor M, closing coil HQ, switching winding TQ behind the formation RC circuit.
Described RC circuit is fixed on the DC line plate PCB; Energy storage motor M, closing coil HQ, switching winding TQ, auxiliary switch S1, auxiliary switch QF are connected respectively on the terminal of DC line plate PCB; The RC circuit is fixed, guaranteed the stability of whole vacuum circuit-breaker.
The terminal of described DC line plate PCB is corresponding in twos, and between the terminal of per two correspondences with the connection of Copper Foil lead, the components and parts of whole vacuum circuit-breaker are coupled together.
A kind of protective circuit of vacuum circuit-breaker, owing to adopt the foregoing circuit structure, this circuit has the following advantages: 1, reduce vacuum circuit-breaker back electromotive force at work, the harmful effect of avoiding back electromotive force to bring; 2, avoid energy storage motor immediate current when starting excessive, the protection entire circuit; 3, only need increase several resistance and electric capacity, it is lower to improve cost; 4, the resistance, the electric capacity that increase are fixed with the DC line plate, stability is high.
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 vacuum circuit-breaker of the utility model;
Embodiment
The utility model comprises energy storage motor M, closing coil HQ, switching winding TQ, auxiliary switch S1, auxiliary switch QF; And energy storage motor M, closing coil HQ, switching winding TQ are parallelly connected with a RC circuit respectively; Thereby energy storage motor M, closing coil HQ, switching winding TQ are protected respectively, and immediate current is excessive when avoiding energy storage motor M to start produces back electromotive force with closing coil HQ, switching winding TQ when divide-shut brake.
The RC circuit is that resistance R and capacitor C are in series, and is parallel to energy storage motor M, closing coil HQ, switching winding TQ behind the formation RC circuit.The RC circuit is fixed on the DC line plate PCB; Energy storage motor M, closing coil HQ, switching winding TQ, auxiliary switch S1, auxiliary switch QF are connected respectively on the terminal of DC line plate PCB; The RC circuit is fixed, guaranteed the stability of whole vacuum circuit-breaker.The terminal of DC line plate PCB is corresponding in twos, and between the terminal of per two correspondences with the connection of Copper Foil lead, the components and parts of whole vacuum circuit-breaker are coupled together.
The utility model place different with prior art is that it does not directly link to each other power supply with switching winding TQ, closing coil HQ with energy storage motor M; But energy storage motor M line and branch, closing line astragal are guided to earlier on the DC line plate PCB, again the RC circuit is connected in parallel on energy storage motor M and divide-shut brake coil two ends.
As shown in Figure 1, earlier with aviation receptacle contact 25 and 35 process fine motion earlier auxiliary switch S1, and then receive on pcb board B1, the B2 contact; Energy storage motor M line is received on DC line plate pcb board B3, the B4 terminal again, wherein on pcb board, with Copper Foil B1 is connected with B3, B2 is connected with B4; Between Copper Foil lead B1B3 and B2B4, parallel resistance R and capacitor C, wherein resistance R and capacitor C series connection.Use the same method again resistance R and capacitor C are connected in parallel on closing coil HQ and switching winding TQ two ends.
Because the utility model is connected in parallel on the load two ends to resistance R and capacitor C: when minute, closing coil moment, resistance R can play shunting action when closed, electric current is very little, at this moment capacitor C is charged; When minute, when closing coil breaks off, the loop produces reverse voltage, capacitor C begins discharge, plays a cushioning effect; Be exactly in fact the impulse electricity process of electric capacity, play reverse voltage buffering absorption; And come energy storage motor M is played metering function through regulating the resistance R value.
This circuit production is simple, and it is convenient and reliable to incorporate resistance R and capacitor C into the load two ends, can the electric element of better protection circuit breaker.
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; Comprise energy storage motor (M), closing coil (HQ), switching winding (TQ), auxiliary switch (S1), auxiliary switch (QF), it is characterized in that: described energy storage motor (M), closing coil (HQ), switching winding (TQ) are parallelly connected with a RC circuit respectively.
2. the protective circuit of a kind of vacuum circuit-breaker according to claim 1 is characterized in that: described RC circuit is that resistance (R) is in series with electric capacity (C), is parallel to energy storage motor (M), closing coil (HQ), switching winding (TQ) after constituting the RC circuit.
3. the protective circuit of a kind of vacuum circuit-breaker according to claim 1; It is characterized in that: described RC circuit is fixed on the DC line plate (PCB), and energy storage motor (M), closing coil (HQ), switching winding (TQ), auxiliary switch (S1), auxiliary switch (QF) are connected respectively on the terminal of DC line plate (PCB).
4. the protective circuit of a kind of vacuum circuit-breaker according to claim 3 is characterized in that: the terminal of described DC line plate (PCB) is corresponding in twos, and connects with the Copper Foil lead between the terminal of per two correspondences.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203456821U CN202230943U (en) | 2011-09-15 | 2011-09-15 | Protection circuit for vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203456821U CN202230943U (en) | 2011-09-15 | 2011-09-15 | Protection circuit for vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202230943U true CN202230943U (en) | 2012-05-23 |
Family
ID=46081521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203456821U Expired - Fee Related CN202230943U (en) | 2011-09-15 | 2011-09-15 | Protection circuit for vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202230943U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634375A (en) * | 2016-03-31 | 2016-06-01 | 广东美的环境电器制造有限公司 | Motor speed regulation device and household electric appliance |
| CN105703692A (en) * | 2016-03-31 | 2016-06-22 | 广东美的环境电器制造有限公司 | Speed adjusting circuit of single phase alternating current motor, fan and air conditioner |
| CN107196577A (en) * | 2017-06-13 | 2017-09-22 | 中山市星光达电子科技有限公司 | A kind of adjustable speed high-power AC motor controls circuit |
-
2011
- 2011-09-15 CN CN2011203456821U patent/CN202230943U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634375A (en) * | 2016-03-31 | 2016-06-01 | 广东美的环境电器制造有限公司 | Motor speed regulation device and household electric appliance |
| CN105703692A (en) * | 2016-03-31 | 2016-06-22 | 广东美的环境电器制造有限公司 | Speed adjusting circuit of single phase alternating current motor, fan and air conditioner |
| CN105634375B (en) * | 2016-03-31 | 2020-06-26 | 广东美的环境电器制造有限公司 | Motor speed regulating device and household appliance |
| CN107196577A (en) * | 2017-06-13 | 2017-09-22 | 中山市星光达电子科技有限公司 | A kind of adjustable speed high-power AC motor controls 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 |