CN204271607U - A kind of dual trip-preventing circuit - Google Patents
A kind of dual trip-preventing circuit Download PDFInfo
- Publication number
- CN204271607U CN204271607U CN201420770726.9U CN201420770726U CN204271607U CN 204271607 U CN204271607 U CN 204271607U CN 201420770726 U CN201420770726 U CN 201420770726U CN 204271607 U CN204271607 U CN 204271607U
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- protecting device
- primary cut
- microcomputer protecting
- supervisory relay
- circuit
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Abstract
The utility model discloses a kind of dual trip-preventing circuit, comprising: microcomputer protecting device anti-jump loop, Antibouncer Loop of High-voltage Breaker and primary cut-out closing circuit.Described microcomputer protecting device anti-jump loop comprises further: microcomputer protecting device jumps position monitoring circuit, and described microcomputer protecting device is jumped position monitoring circuit and included jumping position supervisory relay, the resistance in parallel with described jumping position supervisory relay and resistive unit.One end of described resistive unit is connected with the jumping position supervisory relay in microcomputer protecting device, and the other end and described primary cut-out closing circuit disconnect, and makes the anti-jump loop of primary cut-out and microcomputer protecting device jump position monitoring circuit and disconnects.Therefore avoid and send out control loop template signal by mistake.In addition, the problem of not brake application is closed after there will not be primary cut-out to trip.The utility model does not need more exchange device, cost-saving, and transformation amount is little, meanwhile, can also ensure that two cover anti-jump loops normally work.
Description
Technical field
The utility model relates to primary cut-out technical field, particularly relates to a kind of dual trip-preventing circuit.
Background technology
Along with the development of heavy industry, as metallurgical technology, the safety and reliability of primary cut-out plays a part more and more important in industry manufacture.Primary cut-out not only can cut off or no-load current in closed high circuit and load current, and when system jam by the effect of protective relaying device, cuts off overload electric current and short circuit current, provide more guarantees to the safety of high-tension line.
Under normal circumstances; primary cut-out is owing to there will be jump fault when many reasons closes a floodgate; namely the joystick of primary cut-out is at closing position; when there is fault in circuit; protective relaying device makes primary cut-out trip; now primary cut-out occurs to close a floodgate, trip, the phenomenon of repeatedly repetitive operation.Cause above-mentioned jump fault to have many reasons, as closing circuit hand closes or distant conjunction contact adhesion, cause combined floodgate output always with switching voltage.Because switching voltage exists always, therefore there will be above-mentioned jump fault.Once there is jump fault, primary cut-out can be caused to damage, and accident of even also blasting, destroys the stable operation of whole electric power system.
In recent years, in order to avoid there is jump fault, in increasing high-voltage relay operating mechanism, increase anti-jump loop.But when high-voltage relay operating mechanism and microcomputer protecting device are in co-operation; because microcomputer protecting device exists a set of anti-jump loop, there is a set of anti-jump loop in high-voltage relay, therefore; when dual anti-jump loop, there is the unmatched problem of two cover anti-jump loops.Mainly comprise two kinds:
First, primary cut-out is under co-bit state, and the jumping position supervisory relay in microcomputer protecting device and co-bit relay excitation simultaneously, therefore can send out control loop template signal by mistake.
Secondly, under non-faulting state, because the normally closed contact of the anti-trip relay on primary cut-out closing circuit is in open mode always, therefore, cannot again close a floodgate after primary cut-out tripping operation.
In order to solve the problem, traditional method again purchases new microcomputer protecting device, removes anti-bouncing function in new microcomputer protecting device; so not only can cause the increase of cost of investment; waste existing equipment resource, also add retrofit work amount, extends the span time of transformation.
Utility model content
The purpose of this utility model is to provide a kind of dual trip-preventing circuit; for the actuating structure of compatible microcomputer protective device and primary cut-out, thus avoid the situation that occurs sending out control loop template signal by mistake and cannot again closing a floodgate after primary cut-out tripping operation under non-faulting state.
For solving the problems of the technologies described above, the utility model provides a kind of dual trip-preventing circuit, be applied to the operating mechanism of microcomputer protecting device and primary cut-out, comprise: microcomputer protecting device anti-jump loop, Antibouncer Loop of High-voltage Breaker and primary cut-out closing circuit, described microcomputer protecting device anti-jump loop comprises further: microcomputer protecting device jumps position monitoring circuit, and described microcomputer protecting device is jumped position monitoring circuit and included jumping position supervisory relay, the resistance in parallel with described jumping position supervisory relay and resistive unit;
One end of described resistive unit is connected with the jumping position supervisory relay in microcomputer protecting device, the other end and described primary cut-out closing circuit disconnect, and is connected with the normally closed contact of the sky in primary cut-out by the first dead end of the dead end of microcomputer protecting device connecting terminal block, switch cubicle terminal board, first dead end of high-voltage breaker operation mechanism middle connecting terminal row successively, the second dead end sub-connection of the sub and switch cubicle terminal board of the second dead end of being arranged by high-voltage breaker operation mechanism middle connecting terminal of the normally closed contact of described sky;
Second dead end of described switch cubicle terminal board connects with the terminal being connected the switch cubicle terminal board of power cathode in described primary cut-out closing circuit.
Preferably, described resistive unit is: the resistance of multiple series connection.
Preferably, described high-voltage breaker operation mechanism is spring operating mechanism.
Preferably, described jumping position supervisory relay is configured to be less than the jumping position supervisory relay that the switching time of normal opened contact assisted by primary cut-out operate time.
Preferably, described jumping position supervisory relay was configured in the operate time of ac circuit is the jumping position supervisory relay of 15ms.
Preferably, the mode of connection of described primary cut-out is: wiring after plate.
The dual trip-preventing circuit of one provided by the utility model; be connected with the jumping position supervisory relay in microcomputer protecting device by the resistive unit one end of microcomputer protecting device being jumped in the monitoring circuit of position; the connected mode that the other end and primary cut-out closing circuit disconnect, makes the anti-jump loop of primary cut-out and microcomputer protecting device jump position monitoring circuit and disconnects.This dual trip-preventing circuit effectively can avoid jumping position supervisory relay in microcomputer protecting device and co-bit relay excitation simultaneously, therefore it also avoid and sends out a control loop template signal by mistake.In addition, under non-faulting state, the jumping position supervisory relay excitation of microcomputer protecting device can not the anti-trip relay of impact to voltage Anti-jump Circuit of Breaker, therefore, closes the problem of not brake application after there will not be primary cut-out to trip.The utility model does not need more exchange device, cost-saving, and transformation amount is little, meanwhile, can also ensure that two cover anti-jump loops normally work.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment, simple introduction is done below by the accompanying drawing used required in embodiment, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The circuit diagram of a kind of dual trip-preventing circuit that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making under creative work prerequisite, and the every other embodiment obtained, all belongs to the utility model protection range.
Core of the present utility model is to provide a kind of dual trip-preventing circuit; for the actuating structure of compatible microcomputer protective device and primary cut-out, thus avoid the situation that occurs sending out control loop template signal by mistake and cannot again closing a floodgate after primary cut-out tripping operation under non-faulting state.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The circuit diagram of a kind of dual trip-preventing circuit that Fig. 1 provides for the utility model.
Dual trip-preventing circuit is applied to the operating mechanism of microcomputer protecting device and primary cut-out, comprising: microcomputer protecting device anti-jump loop 1, Antibouncer Loop of High-voltage Breaker 2 and primary cut-out closing circuit 3.
Described microcomputer protecting device anti-jump loop 1 comprises further: microcomputer protecting device jumps position monitoring circuit 10, described microcomputer protecting device is jumped position monitoring circuit 10 and is included jumping position supervisory relay TWJ, the resistance R10 in parallel with described jumping position supervisory relay TWJ, and resistive unit 100, one end of described resistive unit 100 is connected with jumping position supervisory relay TWJ, the other end and described primary cut-out closing circuit 3 disconnect, and successively by the sub-c15 of dead end of microcomputer protecting device connecting terminal block, the sub-x3-40 of first dead end of switch cubicle terminal board, the sub-x3-41 of first dead end of high-voltage breaker operation mechanism middle connecting terminal row is connected with the normally closed contact DL-4 of the sky in primary cut-out, the sub-x3-42 of the second dead end that the normally closed contact DL-4 of described sky is arranged by high-voltage breaker operation mechanism middle connecting terminal is connected with the sub-x3-8 of the second dead end of switch cubicle terminal board, the sub-x3-8 of second dead end of described switch cubicle terminal board connects with the terminal x3-7 being connected the switch cubicle terminal board of power cathode in described primary cut-out closing circuit 3.
Under primary cut-out co-bit state, co-bit supervisory relay HWJ is in obtain electricity condition, the primary cut-out of Antibouncer Loop of High-voltage Breaker 2 assists normal opened contact DL-3 to close, anti-trip relay KO obtains electric excitation, KO normally closed contact is opened, make primary cut-out closing circuit 3 be in off-state, KO normal opened contact is closed simultaneously makes anti-trip relay KO be in self-sustaining state, and namely Antibouncer Loop of High-voltage Breaker 2 plays anti creep performance.
Jump position monitoring circuit 10 due to microcomputer protecting device to separate with Antibouncer Loop of High-voltage Breaker 2 is independent; obtain electric so can not cause jumping position supervisory relay TWJ; namely there will not be jumping position supervisory relay TWJ and co-bit supervisory relay HWJ to be in obtain electricity condition simultaneously, also would not send out control loop short-term signal by mistake.
In addition; jump position monitoring circuit 10 due to microcomputer protecting device to separate with Antibouncer Loop of High-voltage Breaker 2 is independent; when primary cut-out trips; jumping position supervisory relay TWJ obtains electric; also the anti-trip relay KO of Antibouncer Loop of High-voltage Breaker 2 can not be caused to continue electric; namely anti-trip relay KO can normal dead electricity, and KO normally closed contact closes, thus closing circuit of circuit breaker is normally closed a floodgate.
After primary cut-out closes a floodgate; if after breaking down and tripping; microcomputer protecting device normal opened contact PTJ closes; be connected with positive source; the current coil TBJI of the anti-trip relay of microcomputer protecting device obtains electric excitation; TBJI normal opened contact closes; the potential winding TBJV of the anti-trip relay of microcomputer protecting device obtains electric excitation; TBJV normally closed contact is opened and is made primary cut-out closing circuit be in off-state; TBJV normal opened contact is closed simultaneously makes anti-trip relay be in self-sustaining state, and namely microcomputer protecting device plays anti creep performance.
The dual trip-preventing circuit that the present embodiment provides; after primary cut-out disconnects; dual anti-jump effect can be realized; namely microcomputer protecting device plays anti creep performance, Antibouncer Loop of High-voltage Breaker plays anti creep performance; can also ensure that primary cut-out can normally close a floodgate, and primary cut-out can not send out control loop template signal under co-bit state by mistake.
It should be noted that, the concrete parts of the present embodiment to resistive unit 100 do not have strict regulations, and preferably, resistive unit 100 is: the resistance of multiple series connection.
Microcomputer protecting device is made up of parts such as high degree of integration, single-chip microcomputer, high-precision current voltage transformer, relay, high-reliability switch power modules.Microcomputer protecting device, mainly as the power plant of 110kV and following electric pressure, transformer station, switchgear house, also can be used as protection and the observing and controlling of the electric current and voltage of system in electric pressure between part 70V-220V.Therefore, as a kind of preferred implementation, the supply voltage in dual trip-preventing circuit is 220V.
Operating mechanism is the important component part of primary cut-out, and it is made up of energy-storage units, control unit and transfer unit of making a concerted effort.Wherein spring operating mechanism is a kind of mechanical type operating mechanism using spring as energy-storage travelling wave tube.The energy storage of spring has been come by deceleration device by motor, and keeps energy storage state through fastener system.Spring operating mechanism structure is simple, and reliability is high, and therefore, as a kind of optimal way, described high-voltage breaker operation mechanism is spring operating mechanism.
In concrete enforcement, the model of the jumping position supervisory relay TWJ matched can be chosen according to actual high-voltage circuit breaker, guarantee that this relay normally can work at the scene and be less than the change-over time that normal opened contact DL-3 assisted by primary cut-out operate time, therefore, described jumping position supervisory relay TWJ is configured to be less than the jumping position supervisory relay that the switching time of normal opened contact DL-3 assisted by primary cut-out operate time.
For guaranteeing that jumping position supervisory relay TWJ can realize quick acting, it is the jumping position supervisory relay of 15ms that preferred described jumping position supervisory relay was configured in the operate time of ac circuit.
Primary cut-out it not only can cut off or no-load current in closed high circuit and load current, and overload electric current and short circuit current can be cut off when system jam, thus play the effect of protection.At present, the mode of connection of primary cut-out has wiring, plug-in type, drawer type etc. after wiring before plate, plate, and as a kind of optimal way, the mode of connection of described primary cut-out is: wiring after plate.
By adopting the mode of wiring after plate, can change or maintenance primary cut-out time, need not rewiring, only need front level power supply to disconnect.
Above dual trip-preventing circuit provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and execution mode, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection range of the utility model claim.
Claims (6)
1. a dual trip-preventing circuit, is applied to the operating mechanism of microcomputer protecting device and primary cut-out, comprises: microcomputer protecting device anti-jump loop, Antibouncer Loop of High-voltage Breaker and primary cut-out closing circuit, is characterized in that,
Described microcomputer protecting device anti-jump loop comprises further: microcomputer protecting device jumps position monitoring circuit, and described microcomputer protecting device is jumped position monitoring circuit and included jumping position supervisory relay, the resistance in parallel with described jumping position supervisory relay and resistive unit;
One end of described resistive unit is connected with the jumping position supervisory relay in microcomputer protecting device, the other end and described primary cut-out closing circuit disconnect, and is connected with the normally closed contact of the sky in primary cut-out by the first dead end of the dead end of microcomputer protecting device connecting terminal block, switch cubicle terminal board, first dead end of high-voltage breaker operation mechanism middle connecting terminal row successively, the second dead end sub-connection of the sub and switch cubicle terminal board of the second dead end of being arranged by high-voltage breaker operation mechanism middle connecting terminal of the normally closed contact of described sky;
Second dead end of described switch cubicle terminal board connects with the terminal being connected the switch cubicle terminal board of power cathode in described primary cut-out closing circuit.
2. dual trip-preventing circuit according to claim 1, is characterized in that, described resistive unit is: the resistance of multiple series connection.
3. dual trip-preventing circuit according to claim 1, is characterized in that, described high-voltage breaker operation mechanism is spring operating mechanism.
4. dual trip-preventing circuit according to claim 1, is characterized in that, described jumping position supervisory relay is configured to be less than the jumping position supervisory relay that the switching time of normal opened contact assisted by primary cut-out operate time.
5. dual trip-preventing circuit according to claim 1, is characterized in that, it is the jumping position supervisory relay of 15ms that described jumping position supervisory relay was configured in the operate time of ac circuit.
6. dual trip-preventing circuit according to claim 1, is characterized in that, the mode of connection of described primary cut-out is: wiring after plate.
Priority Applications (1)
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CN201420770726.9U CN204271607U (en) | 2014-12-09 | 2014-12-09 | A kind of dual trip-preventing circuit |
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CN201420770726.9U CN204271607U (en) | 2014-12-09 | 2014-12-09 | A kind of dual trip-preventing circuit |
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CN204271607U true CN204271607U (en) | 2015-04-15 |
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CN201420770726.9U Expired - Fee Related CN204271607U (en) | 2014-12-09 | 2014-12-09 | A kind of dual trip-preventing circuit |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105305620A (en) * | 2015-10-22 | 2016-02-03 | 山东钢铁股份有限公司 | Disconnection monitoring system of breaker closing control circuit |
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2014
- 2014-12-09 CN CN201420770726.9U patent/CN204271607U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105305620A (en) * | 2015-10-22 | 2016-02-03 | 山东钢铁股份有限公司 | Disconnection monitoring system of breaker closing control circuit |
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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: 20150415 Termination date: 20171209 |
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CF01 | Termination of patent right due to non-payment of annual fee |