CN104113046A - Intermittent starting device of circuit breaker coil - Google Patents
Intermittent starting device of circuit breaker coil Download PDFInfo
- Publication number
- CN104113046A CN104113046A CN201410303142.5A CN201410303142A CN104113046A CN 104113046 A CN104113046 A CN 104113046A CN 201410303142 A CN201410303142 A CN 201410303142A CN 104113046 A CN104113046 A CN 104113046A
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- CN
- China
- Prior art keywords
- triode
- circuit breaker
- coil
- operational amplifier
- hall element
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Abstract
The invention relates to circuit breaker protection technology, specifically to an intermittent starting device of a circuit breaker coil, and solves the problem that no device capable of preventing an opening and closing coil of a circuit breaker from being burnt up when opening and closing faults occur in the circuit breaker exists at present. The intermittent starting device of the circuit breaker coil includes an annular magnetic core, an auxiliary side compensating coil, a Hall element, an operational amplifier, a first triode, a second triode, a measuring resistor, a positive power supply end, a negative power supply end, and a signal output end, wherein the annular magnetic core is provided with an opening, the auxiliary side compensating coil is wound on the annular magnetic core, the Hall element is located in the opening of the annular magnetic core, two input ends of the operational amplifier are connected with two output ends of the Hall element, and a base electrode of the first triode and a base electrode of the second triode are connected with an output end of the operational amplifier. The intermittent starting device of the circuit breaker coil in the invention is suitable for intermediate- and low-voltage transformer substation of an electric power system.
Description
Technical field
The present invention relates to breaker protection technology, specifically a kind of breaker coil intermittent start device.
Background technology
In electric power system, in substation, circuit breaker tends to because armature bite, auxiliary contact conversion are bad etc. former thereby occur divide-shut brake fault.Once and divide-shut brake fault appears in circuit breaker, just can cause the divide-shut brake coil burnout of circuit breaker, thereby cause large area blackout.Therefore,, if can invent a kind of device that can prevent the divide-shut brake coil burnout of circuit breaker in the time that divide-shut brake fault appears in circuit breaker, can effectively avoid the generation of power outage.But there is no at present so a kind of device.
Summary of the invention
The present invention there is no a kind of problem that can prevent the device of the divide-shut brake coil burnout of circuit breaker in the time that divide-shut brake fault appears in circuit breaker at present in order to solve, and a kind of breaker coil intermittent start device is provided.
The present invention adopts following technical scheme to realize: breaker coil intermittent start device, comprises toroidal core, secondary bucking coil, Hall element, operational amplifier, the first triode, the second triode, measuring resistance, positive power source terminal, negative power end, signal output part; Wherein, on toroidal core, offer gap; Secondary bucking coil is wound on toroidal core; Hall element is positioned at the gap of toroidal core; Two inputs of operational amplifier are connected with two outputs of Hall element respectively; The base stage of the first triode, the base stage of the second triode are all connected with the output of operational amplifier; The collector electrode of the first triode is connected with positive power source terminal; The collector electrode of the second triode is connected with negative power end; The emitter of the first triode, the emitter of the second triode are all connected with one end of secondary bucking coil; The other end of secondary bucking coil is connected with signal output part; One end of measuring resistance is connected with signal output part; The other end ground connection of measuring resistance.
When work, toroidal core is set on the divide-shut brake coil of circuit breaker.Signal output part is accessed to the divide-shut brake wire loop of circuit breaker.Specific works process is as follows: in the time of normal operation of circuit breaker, electric current in the divide-shut brake coil of circuit breaker is close to zero, induced field intensity in toroidal core is close to zero, the output voltage of Hall element is close to zero, the output voltage of operational amplifier is close to zero, the first triode and the equal remain off of the second triode.Now, no current in secondary bucking coil, the voltage of signal output part is zero.In the time there is divide-shut brake fault in circuit breaker, electric current moment in the divide-shut brake coil of circuit breaker increases, induced field intensity moment in toroidal core increases, the output voltage moment of Hall element raises, the output voltage moment of operational amplifier raises, the first triode transient switching, the second triode remain off, in secondary bucking coil, moment produces secondary offset current, and the voltage instantaneous of signal output part increases.In secondary bucking coil, produce after secondary offset current, induced field in magnetic field and toroidal core that secondary offset current produces superposes, the output voltage of Hall element further raises, the output voltage of operational amplifier further raises, the second triode transient switching, secondary offset current moment in secondary bucking coil is decreased to zero, and the voltage instantaneous of signal output part is reduced to zero.Based on this, signal output part has just produced a voltage pulse signal, can, by the divide-shut brake wire loop instantaneous trip of circuit breaker, prevent thus the divide-shut brake coil burnout of circuit breaker, thereby effectively avoid the generation of power outage by this voltage pulse signal.Based on said process, breaker coil intermittent start device of the present invention is by adopting brand new, realize the divide-shut brake coil burnout that prevents circuit breaker in the time that divide-shut brake fault appears in circuit breaker, efficiently solved thus and there is no at present a kind of problem that can prevent the device of the divide-shut brake coil burnout of circuit breaker in the time that divide-shut brake fault appears in circuit breaker.
The present invention is rational in infrastructure, it is ingenious to design, and efficiently solves and there is no at present a kind of problem that can prevent the device of the divide-shut brake coil burnout of circuit breaker in the time that divide-shut brake fault appears in circuit breaker, be applicable to electric power system in, substation.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure: 1-toroidal core, 2-secondary bucking coil, the divide-shut brake coil of 3-circuit breaker.
Embodiment
Breaker coil intermittent start device, comprises toroidal core 1, secondary bucking coil 2, Hall element H, operational amplifier A, the first triode Q1, the second triode Q2, measuring resistance R, positive power source terminal+Vc, negative power end-Vc, signal output part out; Wherein, on toroidal core 1, offer gap; Secondary bucking coil 2 is wound on toroidal core 1; Hall element H is positioned at the gap of toroidal core 1; Two inputs of operational amplifier A are connected with two outputs of Hall element H respectively; The base stage of the first triode Q1, the base stage of the second triode Q2 are all connected with the output of operational amplifier A; The collector electrode of the first triode Q1 is connected with positive power source terminal+Vc; The collector electrode of the second triode Q2 is connected with negative power end-Vc; The emitter of the first triode Q1, the emitter of the second triode Q2 are all connected with one end of secondary bucking coil 2; The other end of secondary bucking coil 2 is connected with signal output part out; One end of measuring resistance R is connected with signal output part out; The other end ground connection of measuring resistance R.
When concrete enforcement, the first triode Q1, the second triode Q2 are NPN type triode.
Claims (1)
1. a breaker coil intermittent start device, is characterized in that: comprise toroidal core (1), secondary bucking coil (2), Hall element (H), operational amplifier (A), the first triode (Q1), the second triode (Q2), measuring resistance (R), positive power source terminal (+Vc), negative power end (Vc), signal output part (out); Wherein, on toroidal core (1), offer gap; Secondary bucking coil (2) is wound on toroidal core (1); Hall element (H) is positioned at the gap of toroidal core (1); Two inputs of operational amplifier (A) are connected with two outputs of Hall element (H) respectively; The base stage of the first triode (Q1), the base stage of the second triode (Q2) are all connected with the output of operational amplifier (A); The collector electrode of the first triode (Q1) is connected with positive power source terminal (+Vc); The collector electrode of the second triode (Q2) is connected with negative power end (Vc); The emitter of the first triode (Q1), the emitter of the second triode (Q2) are all connected with one end of secondary bucking coil (2); The other end of secondary bucking coil (2) is connected with signal output part (out); One end of measuring resistance (R) is connected with signal output part (out); The other end ground connection of measuring resistance (R).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410303142.5A CN104113046A (en) | 2014-06-30 | 2014-06-30 | Intermittent starting device of circuit breaker coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410303142.5A CN104113046A (en) | 2014-06-30 | 2014-06-30 | Intermittent starting device of circuit breaker coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104113046A true CN104113046A (en) | 2014-10-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410303142.5A Pending CN104113046A (en) | 2014-06-30 | 2014-06-30 | Intermittent starting device of circuit breaker coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104113046A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202256455U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Magnetic balanced type Hall current sensor |
| CN202256454U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Current sensor |
| CN203133146U (en) * | 2013-03-21 | 2013-08-14 | 国家电网公司 | Transformer neutral point current measuring device |
| CN203502481U (en) * | 2013-10-25 | 2014-03-26 | 孟鹏飞 | Single-magnetic-ring four-coil DC current detection device |
-
2014
- 2014-06-30 CN CN201410303142.5A patent/CN104113046A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202256455U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Magnetic balanced type Hall current sensor |
| CN202256454U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Current sensor |
| CN203133146U (en) * | 2013-03-21 | 2013-08-14 | 国家电网公司 | Transformer neutral point current measuring device |
| CN203502481U (en) * | 2013-10-25 | 2014-03-26 | 孟鹏飞 | Single-magnetic-ring four-coil DC current detection device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141022 |