CN103018619A - Detection circuit of open circuit of operating mechanism opening coil and detection method thereof - Google Patents
Detection circuit of open circuit of operating mechanism opening coil and detection method thereof Download PDFInfo
- Publication number
- CN103018619A CN103018619A CN2012104725364A CN201210472536A CN103018619A CN 103018619 A CN103018619 A CN 103018619A CN 2012104725364 A CN2012104725364 A CN 2012104725364A CN 201210472536 A CN201210472536 A CN 201210472536A CN 103018619 A CN103018619 A CN 103018619A
- Authority
- CN
- China
- Prior art keywords
- photoisolator
- circuit
- pin
- output pin
- input pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The invention relates to a detection circuit of the open circuit of an operating mechanism opening coil and a detection method thereof. The detection circuit comprises a breaker opening coil TQ, an operating circuit positive power supply +KM, an operating circuit negative power supply -KM, an optoelectronic isolator OC1 and an optoelectronic isolator OC2. The detection method is characterized in that the input pin 2 of the optoelectronic isolator OC1 is grounded, and the other input pin 1 of the optoelectronic isolator OC1 is connected with the output pin 3 of a singlechip; the output pin 3 of the optoelectronic isolator OC1 is connected with the operating circuit positive power supply +KM, and the other output pin 4 of the optoelectronic isolator OC1 is connected with the input pin 1 of the optoelectronic isolator OC2; the input pin 2 of the optoelectronic isolator OC2 is sequentially connected with the breaker opening coil TQ and the operating circuit negative power supply -KM; the output pin 3 of the optoelectronic isolator OC2 is grounded; the output pin 4 of the optoelectronic isolator OC2 is branched into two ways to be respectively connected with a power supply VCC (Voltage To Current Converter) and the detection pin 2 of the singlechip; and the singlechip is connected with an alarm circuit. The detection circuit disclosed by the invention has the advantages of simpler structure, more convenience for implementation and operation and suitability for the detection of the open circuit of the operating mechanism opening coil or the improvement of similar methods.
Description
Technical field
The present invention relates to the detection of opening circuit of operating mechanism switching winding, is a kind of operating mechanism switching winding broken circuit detection circuit and detection method thereof.
Background technology
Switching winding is the final executive component in electric power system control, protection loop, is again one of critical elements in the primary cut-out electromagnetic operating mechanism, and safety and the reliability service of electric system had very important effect.Existing switching winding is all by in short-term charged design, if occur during separating brake that breaker mechanism and auxiliary switch mismate, auxiliary switch break down or the problem such as mechanism's bite, to cause the auxiliary switch node in time not disconnect, sub-gate circuit is with long-term self-sustaining, be that switching winding will be charged for a long time, certainly will cause like this switching winding to be burnt, bring for the safe and stable operation of electrical network and seriously influence.Because the integrity of switching winding is the pacing items of action message when guaranteeing that isolating switch breaks down in system, excision fault, therefore, in the control loop of isolating switch, must arrange and detect the loop, under "on" position, the sub-gate circuit integrity is monitored, guarantee the safe and stable operation of electrical network.Existing detection loop adopts single-chip microcomputer to control usually, but the detection signal of existing single-chip microcomputer is generally 5V or 10V, and switching winding is generally direct current 220V or 110V by the separating brake control power supply that distant place separating brake switch connects, therefore detect comparatively difficulty; In addition, must not cause the separating brake misoperation because of the detection signal electric current during input; At some in particular cases, for example: when detecting, receive again sub-gate signal, at this moment, when guaranteeing reliable separating brake action executing, opening circuit can not have destruction to testing circuit, for above problem and difficult point, does not also have comparatively simple and reliable technical scheme at present.
Summary of the invention
For overcoming the problems referred to above, the objective of the invention is provides a kind of operating mechanism switching winding broken circuit detection circuit and detection method thereof to this area, the existing operating mechanism switching winding of its solution is opened circuit detect comparatively difficulty, the inconvenient technical matters of enforcement.Its objective is and be achieved through the following technical solutions.
A kind of operating mechanism switching winding broken circuit detection circuit, this testing circuit comprises breaker open operation coil TQ, operation circuit positive supply+KM, operation circuit negative supply-KM, photoisolator OC1, photoisolator OC2, single-chip microcomputer U1, alarm circuit T1.Its main points are input pin 2 ground connection of described photoisolator OC1, another input pin 1 links to each other with the output pin 3 of described single-chip microcomputer, the output pin 3 of photoisolator OC1 links to each other with described operation circuit positive supply+KM, another output pin 4 links to each other with the input pin 1 of described photoisolator OC2, the input pin 2 of photoisolator OC2 connects described breaker open operation coil TQ, breaker open operation coil TQ connects described operation circuit negative supply-KM, output pin 3 ground connection of described photoisolator OC2, output pin 4 branch's two-way of photoisolator OC2, wherein one the tunnel connects power supply VCC, other end road connects the detection input pin 2 of described single-chip microcomputer, and single-chip microcomputer U1 connects external alarm circuit.In the foregoing circuit, described photoisolator OC1 is in fact as signal control circuit, described photoisolator OC2 is then as signal deteching circuit, input pin conducting by the described photoisolator OC1 of Single-chip Controlling, then make the output pin conducting of photoisolator OC1, thereby the loop at the described breaker open operation coil of conducting place, intact and the disconnection two states according to the breaker open operation coil, thereby affect the conducting state of photoisolator OC2 input pin and output pin, when the conducting of photoisolator OC2 output pin, then described single-chip microcomputer is sent low level signal, when photoisolator OC2 output pin not during conducting, then described single-chip microcomputer is sent high level signal, the disconnection that can judge the breaker open operation coil by low level and high level two states whether, not only circuit is comparatively simple, and control is comparatively convenient, and it is comparatively accurate that the result judges.
Be connected protection diode D1, current-limiting resistance R2 between the output pin 3 of described photoisolator OC1 and the described operation circuit positive supply+KM; Be connected protection diode D2, current-limiting resistance R2 between the input pin 2 of described photoisolator OC2 and the described breaker open operation coil TQ, the electric current that makes testing circuit flow into the breaker open operation coil is about 15mA, guarantees can not cause the separating brake misoperation of breaker open operation coil; Be connected current-limiting resistance R3 between the input pin 1 of described photoisolator OC1 and the output pin 3 of described single-chip microcomputer; The output pin 4 of described photoisolator OC2 is divided into two branch roads, and one tunnel detection pin 2, a tunnel that connects described single-chip microcomputer U1 connects and connects pull-up resistor R4 in the branch of described power supply VCC.The purpose of setting up current-limiting resistance, protection diode in the above structure is reliability and the security in order to improve circuit.
Described photoisolator OC1 and photoisolator OC2 all adopt the controllable silicon photoisolator.Adopt the controllable silicon photoisolator, its withstand voltage degree can reach 200V even higher, to satisfy requirement of withstand voltage.
The detection method of this operating mechanism switching winding broken circuit detection circuit is: apply electric signal periodically for the input pin 1 of described photoisolator OC1 by the output pin of described single-chip microcomputer, the input pin 1 of photoisolator OC1 and input pin 2 conductings, thus make the output pin 3 and output pin 4 conductings of photoisolator OC1; When opening circuit does not appear in described breaker open operation coil TQ, be to keep path between described operation circuit positive supply+KM and the described operation circuit negative supply-KM, there is electric current to pass through between the input pin 1 of described photoisolator OC2 and the input pin 2, therefore output pin 3 and output pin 4 conductings of photoisolator OC2, at this moment, 4 pairs of described single-chip microcomputers of the output pin of photoisolator OC2 detect pin 2 input low level signals, and the expression switching winding is intact; When off state appears in described breaker open operation coil TQ, be to open circuit between described operation circuit positive supply+KM and the described operation circuit negative supply-KM, no signal current passes through between the input pin 1 of described photoisolator OC2 and the input pin 2, therefore output pin 3 and the not conducting of output pin 4 of photoisolator OC2, at this moment, the output pin 4 of photoisolator OC2 will detect pin 2 input high level signals to described single-chip microcomputer, given the alarm by single-chip microcomputer pin 5 and the described alarm circuit T1 of pin 6 controls, occur opening circuit with expression breaker open operation coil.
Circuit structure of the present invention is comparatively simple, make processing and implementation and operation comparatively convenient, testing circuit and breaker open operation control do not interfere with each other, and need not artificial operation on duty, realize automatically detecting, reporting to the police, the generation of accident is effectively avoided in the security when having improved operating mechanism work, be suitable as the operating mechanism switching winding and open circuit and detect to use, or with the improvement of class methods.
Description of drawings
Fig. 1 is circuit control principle schematic diagram of the present invention, and the components and parts that comprise among the figure have: operation circuit positive supply+KM, protection diode D1, protection diode D2, current-limiting resistance R1, current-limiting resistance R2, current-limiting resistance R3, pull-up resistor R4, photoisolator OC1, photoisolator OC2, power supply VCC, breaker open operation coil TQ, operation circuit negative supply-KM, single-chip microcomputer U1, alarm circuit T1.
Embodiment
By reference to the accompanying drawings, the invention will be further described.
This operating mechanism switching winding broken circuit detection circuit comprises breaker open operation coil TQ; operation circuit positive supply+KM; operation circuit negative supply-KM; photoisolator OC1; photoisolator OC2; input pin 2 ground connection of photoisolator OC1; another input pin 1 is by the output pin 3(+5V voltage of a current-limiting resistance R3 with single-chip microcomputer) link to each other; the output pin 3 of photoisolator OC1 is through current-limiting resistance R1; protection diode D1 links to each other with operation circuit positive supply+KM; the output pin 4 of photoisolator OC1 links to each other with the input pin 1 of photoisolator OC2; the input pin 2 of photoisolator OC2 is through overprotection diode D2; current-limiting resistance R2 links to each other with breaker open operation coil TQ, breaker open operation coil TQ attended operation loop negative supply-KM.Output pin 3 ground connection of photoisolator OC2, output pin 4 branch's two-way of photoisolator OC2, wherein one the tunnel through pull-up resistor R4 and power supply VCC(+5V) link to each other, another road is connected to the detection pin 2 of single-chip microcomputer as the input end, single-chip microcomputer pin 5 are connected with pin connect alarm circuit T1(with the control circuit of sound and light alarm).
The detection principle of foregoing circuit structure is: at first, and the output pin 3 by single-chip microcomputer, be generally+5V voltage is the input pin 1 and input pin 2 conductings of photoisolator OC1, output pin 3 and output pin 4 conductings of corresponding photoisolator OC1.At this moment, if breaker open operation coil TQ intact (namely not disconnecting), then keep path between operation circuit positive supply+KM and the operation circuit negative supply-KM, there is electric current to pass through between the input pin 1 of photoisolator OC2 and the input pin 2, then output pin 3 and output pin 4 conductings of photoisolator OC2, because output pin 3 ground connection of photoisolator OC2, therefore the input end ground connection (0V) that the output pin 4 of photoisolator OC2 connects, the detection pin 2 of 4 pairs of single-chip microcomputers of output pin of corresponding photoisolator OC2 shows as low level signal, according to this low level signal, can judge that the breaker open operation coil in the loop is in normal intact state.When breaker open operation coil TQ disconnects, then disconnect between operation circuit positive supply+KM and the operation circuit negative supply-KM, even the output pin 3 of photoisolator OC1 and output pin 4 keep conducting, but disconnect between the input pin 1 of photoisolator OC2 and the input pin 2, disconnect between the output pin 3 of corresponding photoisolator OC2 and the output pin 4, the input end that the output pin 4 of photoisolator OC2 connects directly with power supply VCC(+5V) link to each other, therefore the detection pin 2 of 4 pairs of single-chip microcomputers of output pin of photoisolator OC2 shows as high level signal, at this moment, T1 gives the alarm by the Single-chip Controlling alarm circuit, with expression breaker open operation coil generation open circuit fault.Corresponding operating personnel can make timely operating mechanism according to above-mentioned information and processing, to prevent trouble before it happens.
Claims (4)
1. operating mechanism switching winding broken circuit detection circuit, this testing circuit comprises breaker open operation coil TQ, operation circuit positive supply+KM, operation circuit negative supply-KM, photoisolator OC1, photoisolator OC2, single-chip microcomputer U1, alarm circuit T1; Input pin 2 ground connection that it is characterized in that described photoisolator OC1, another input pin 1 links to each other with the output pin 3 of described single-chip microcomputer, the output pin 3 of photoisolator OC1 links to each other with described operation circuit positive supply+KM, another output pin 4 links to each other with the input pin 1 of described photoisolator OC2, the input pin 2 of photoisolator OC2 connects described breaker open operation coil TQ, breaker open operation coil TQ connects described operation circuit negative supply-KM, output pin 3 ground connection of described photoisolator OC2, output pin 4 branch's two-way of photoisolator OC2, wherein one the tunnel connects power supply VCC, another road connects the detection pin 2 of described single-chip microcomputer, and single-chip microcomputer connects alarm circuit T1.
2. be connected protection diode D1, current-limiting resistance R2 between the described operating mechanism switching winding broken circuit detection circuit according to claim 1, the output pin 3 that it is characterized in that described photoisolator OC1 and described operation circuit positive supply+KM; Be connected protection diode D2, current-limiting resistance R2 between the input pin 2 of described photoisolator OC2 and the described breaker open operation coil TQ; Be connected current-limiting resistance R3 between the input pin 1 of described photoisolator OC1 and the output pin 3 of described single-chip microcomputer; Be connected pull-up resistor R4 in the output pin 4 of described photoisolator OC2 and the branch of described power supply VCC.
3. described operating mechanism switching winding broken circuit detection circuit according to claim 1 and 2 is characterized in that described photoisolator OC1 and photoisolator OC2 all adopt the controllable silicon photoisolator.
4. detection method of operating mechanism switching winding broken circuit detection circuit as claimed in claim 1, it is characterized in that periodically applying electric signal to the input pin 1 of described photoisolator OC1 by the output pin 3 of described single-chip microcomputer, the input pin 1 of photoisolator OC1 and input pin 2 conductings, thus make the output pin 3 and output pin 4 conductings of photoisolator OC1; When opening circuit does not appear in described breaker open operation coil TQ, be to keep path between described operation circuit positive supply+KM and the described operation circuit negative supply-KM, there is current signal to pass through between the input pin 1 of described photoisolator OC2 and the input pin 2, therefore output pin 3 and output pin 4 conductings of photoisolator OC2, at this moment, 4 pairs of described single-chip microcomputers of the output pin of photoisolator OC2 detect pin 2 input low level signals, and the expression switching winding is intact; When off state appears in described breaker open operation coil TQ, be to open circuit between described operation circuit positive supply+KM and the described operation circuit negative supply-KM, no signal current passes through between the input pin 1 of described photoisolator OC2 and the input pin 2, therefore output pin 3 and the not conducting of output pin 4 of photoisolator OC2, at this moment, the output pin 4 of photoisolator OC2 will detect pin 2 input high level signals to described single-chip microcomputer, and given the alarm by the described alarm circuit T1 of single-chip microcomputer pin 5 and pin 6 controls, occur opening circuit with expression breaker open operation coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104725364A CN103018619A (en) | 2012-11-19 | 2012-11-19 | Detection circuit of open circuit of operating mechanism opening coil and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104725364A CN103018619A (en) | 2012-11-19 | 2012-11-19 | Detection circuit of open circuit of operating mechanism opening coil and detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103018619A true CN103018619A (en) | 2013-04-03 |
Family
ID=47967447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104725364A Pending CN103018619A (en) | 2012-11-19 | 2012-11-19 | Detection circuit of open circuit of operating mechanism opening coil and detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103018619A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297675A (en) * | 2014-07-18 | 2015-01-21 | 国家电网公司 | All-state monitoring apparatus for opening and closing of circuit breaker |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014137A (en) * | 1983-07-05 | 1985-01-24 | Nec Corp | Orientating system of break point of optical fiber |
| CN101059548A (en) * | 2007-06-06 | 2007-10-24 | 常熟开关制造有限公司(原常熟开关厂） | Magnet coil break detection circuit |
| CN201255757Y (en) * | 2008-08-29 | 2009-06-10 | 山东信通电器有限公司 | Electric cable break detecting alarm |
| CN101493678A (en) * | 2008-12-16 | 2009-07-29 | 天津市百利电气有限公司 | Intelligent controller for universal breaker and control method thereof |
| CN101734262A (en) * | 2009-12-30 | 2010-06-16 | 成都运达创新科技有限公司 | Thermal fuse type sensor and lead-off detection method thereof |
-
2012
- 2012-11-19 CN CN2012104725364A patent/CN103018619A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014137A (en) * | 1983-07-05 | 1985-01-24 | Nec Corp | Orientating system of break point of optical fiber |
| CN101059548A (en) * | 2007-06-06 | 2007-10-24 | 常熟开关制造有限公司(原常熟开关厂） | Magnet coil break detection circuit |
| CN201255757Y (en) * | 2008-08-29 | 2009-06-10 | 山东信通电器有限公司 | Electric cable break detecting alarm |
| CN101493678A (en) * | 2008-12-16 | 2009-07-29 | 天津市百利电气有限公司 | Intelligent controller for universal breaker and control method thereof |
| CN101734262A (en) * | 2009-12-30 | 2010-06-16 | 成都运达创新科技有限公司 | Thermal fuse type sensor and lead-off detection method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297675A (en) * | 2014-07-18 | 2015-01-21 | 国家电网公司 | All-state monitoring apparatus for opening and closing of circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103236680B (en) | surge protector intelligent protection device and surge protector intelligent protection method | |
| CN109509658B (en) | A kind of relay protection DC control circuit and its full working scope monitoring and fault early warning method | |
| CN103069530B (en) | The DC load cut-off catalyst of quasiconductor auxiliary | |
| CN106655145B (en) | A kind of battery power feeds electric voltage reverse-connection protection circuit | |
| CN100483143C (en) | Magnet coil break detection circuit | |
| CN100353642C (en) | Method and device of realizing hot plug for power distribution singleboard | |
| CN105896469B (en) | A kind of circuit protection device of automatic monitoring operation troubles | |
| CN102709901B (en) | Current transformer over-voltage protection method and device | |
| WO2014124660A1 (en) | Method and device for detection of a fault in a protected unit | |
| CN204835232U (en) | Looped netowrk cabinet secondary circuit stator indicator | |
| CN100414796C (en) | Under-voltage isolating monitoring circuit | |
| CN203522122U (en) | Load line fault detection circuit applied to circuit breaker reclosing | |
| CN115332013A (en) | High-voltage direct-current intelligent relay control circuit | |
| CN209675960U (en) | A kind of preliminary filling protective device | |
| CN106873748A (en) | The control method and system of a kind of server power supply | |
| CN106314189A (en) | Charging and discharging circuit and automobile | |
| JP7137652B1 (en) | Battery test system safety protection device and method | |
| CN101931209B (en) | The equipment of signaling electric fault and method, the unit comprising this equipment and distribution panelboard | |
| CN100593274C (en) | A close loop protection circuit for middle voltage breaker | |
| CN208874351U (en) | A kind of nuclear safe level uninterruptible power system and its bypass voltage monitor warning circuit | |
| CN205693346U (en) | Petal-shaped distribution line optical fiber differential protective circuit | |
| CN204230865U (en) | A kind of motor protecting device | |
| CN103018619A (en) | Detection circuit of open circuit of operating mechanism opening coil and detection method thereof | |
| CN207719072U (en) | A kind of circuit-breaker switching on-off loop monitor | |
| CN107681633B (en) | Intelligent secondary voltage protection device for voltage transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |