CN201038719Y - Controller possessing spare quick brake-separating judging circuit - Google Patents
Controller possessing spare quick brake-separating judging circuit Download PDFInfo
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- CN201038719Y CN201038719Y CNU2006201413483U CN200620141348U CN201038719Y CN 201038719 Y CN201038719 Y CN 201038719Y CN U2006201413483 U CNU2006201413483 U CN U2006201413483U CN 200620141348 U CN200620141348 U CN 200620141348U CN 201038719 Y CN201038719 Y CN 201038719Y
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Abstract
The utility model belongs to the technical field of low control in electric industry, disclosing a controller 1 whit a spare high-speed open judgment circuit. The utility model comprises a DSC digital signal controller 11, a LCD and keyboard 12 of human-machine interface, an operational circuit 13, an output signal source 14 for mutual inductor, a tripping open circuit 16, a flux-frequency convertor 17 and a power 18; the utility model is also prepared with a high-speed open judgment circuit 15. The utility model applies the comparator with three ways positive and negative semiwave output to be opposite with the logic and output formed by the logic pull-up and the wave filter circuit, when current flow of any of the three phases closes to the limited value, the utility model will output the negative pulse and rapidly drives the tripping open circuit 16, and then the flux-frequency convertor 17 controls the breaker to switch the mechanism; the switching precise is easily to be controlled. The application of the utility model in the intelligent universal low voltage breaker and other electricity distributing automation safety control device can remarkably reduce the switching fault rate and increase the running safety and reliability of the electric power.
Description
Technical field
The utility model belongs to power industry low voltage control technical field, relates in particular to a kind of controller that has standby quick acting switching-off decision circuitry, is used for the controller of intelligent universal low-voltage circuit breaker.
Background technology
The intelligent universal low-voltage circuit breaker is widely used in the electric power low-voltage distribution system, and it is the electric equipments of electric power low-voltage distribution system overload and short-circuit protection, and intelligent controller then is the control assembly of intelligent universal low-voltage circuit breaker.The intelligent controller of prior art, owing to adopt MCU (microprocessor) or DSC digital signal controller as master chip, the time of its program initialization is longer; The master chip power supply often is furnished with power monitoring chip to make and has electrification reset time-delay when processor works on power; Overload/short-circuit signal will pass through discharge circuit amplification, filtering, change through AD sample conversion module samples after instrument transformer output, just send the separating brake instruction after software processes is judged, the overload/short-circuit protection processing time is longer, and link is more, usually reach 20～40ms, in addition bigger; Also can be because of certain component wear or inefficacy in the circuit, microcontroller can't send the breaker open operation signal, more than the circuit breaker time-delay disjunction even can not disjunction can make the major loop short circuit time of multiple reason, thereby cause distribution system or equipment overcurrent/duration of short circuit long.Running current on the electric power power transmission and transformation major loop is up to several kiloamperes, more may reach tens kilo-amperes even kilo-ampere up to a hundred during short circuit, though in the standard GB 14048, controlling the time of delay of threading off is less than 200ms, but under so big short circuit current situation, for subscriber equipment and controller switching equipment, be similar to the limit disjunction of circuit breaker, it is exactly unallowed surpassing 50 milliseconds, all can make power department and user suffer great economic loss, even cause serious social influence.Shorten the short circuit breaking time, for the electricity consumption that ensures safety, prolong service life of equipment, cut down the consumption of energy all significant.
Be head it off; a kind of stand-by protection separating brake circuit that the original controller of power industry adopts is that output waveform with fast saturable inductor is as the dropout foundation; though can behind circuit overload/short trouble, send the separating brake instruction in the short period of time; but because its judgement precision is relatively poor; cause misoperation easily; and its dropout pulse duration is difficult to control, makes its range of application that bigger limitation be arranged.
Summary of the invention
In order to overcome the above-mentioned defective of prior art, the purpose of this utility model provides a kind of controller that has standby quick acting switching-off decision circuitry, shortens the protection opening time at double, improves separating brake and judges precision, reduces because accident and the loss that separating brake causes.The technical solution of the utility model is as follows:
The controller that has standby quick acting switching-off decision circuitry, form by auxiliary circuits such as digital signal controller DSC11, man-machine interface 12, discharge circuit 13, instrument transformer signal source output 14, dropout separating brake circuit 16, magnetic flow convertor 17 and power supplys 18, also have a standby quick acting switching-off decision circuitry 15, wherein:
Described standby quick acting switching-off decision circuitry 15 by three the tunnel just is, negative half-wave comparator is to 151,152,153 and draw in logic, filter circuit 154 and three collection voltage dividers 155,156,157 form, three the tunnel just, negative half-wave comparator is to 151,152,153 input is respectively through gathering voltage divider 155,156,157 connect A, B, C three-phase instrument transformer output voltage signal source 141,142,143, three the tunnel just, negative half-wave comparator is to 151,152,153 output parallel connection, this parallel connection point is by drawing in logic, behind the filter circuit 154, be the output of standby quick acting switching-off decision circuitry 15, the control end that it connects the dropout separating brake circuit 16 of the controller 1 that has standby quick disjunction decision circuitry draws in logic, another termination power Vcc of filter circuit 154;
Described instrument transformer signal source output 14 comprises voltage signal source of being exported by the instrument transformer hollow coil and the current signal source of being exported by instrument transformer speed saturable inductor.
The described controller that has standby quick acting switching-off decision circuitry, three tunnel positive and negative half-wave comparator of its standby quick acting switching-off decision circuitry 15 all is made up of a positive half wave comparator and a negative half-wave comparator 151,152,153, and the benchmark voltage of positive half wave comparator is V
Ref+, the benchmark voltage of negative half-wave comparator is V
Ref-, the input of positive and negative half-wave comparator also is connected the output of gathering voltage divider, and three tunnel positive and negative half-wave comparator is to 151,152, the 153 all-wave voltages of monitoring A, B, C three-phase respectively;
Described three tunnel positive and negative half-wave comparator constitutes adopting integrated device or resolution element, preferentially adopts many comparators, low-power consumption, integrated device that actuating force is strong.
The described controller that has standby quick acting switching-off decision circuitry, three road positive and negative half-wave comparators of its standby quick acting switching-off decision circuitry 15 to 151,152,153 comparator for opening leakage output comparator, its output circuit be out to leak output comparator and draw in logic, filter circuit 154 cooperates the logical output that constitutes, also can adopt common comparator and logical AND gate digital circuit to cooperate to constitute logical to export;
As preferably, adopt open output comparator with Louing and draw in logic, filter circuit 154 cooperates the formation logicals to export.
The described controller that has standby quick acting switching-off decision circuitry, the drawing in logic of its standby quick acting switching-off decision circuitry 15, filter circuit 154 are made up of logic voltage pull-up resistor and filter capacitor, logic voltage pull-up resistor one end connects power Vcc, and three pairs of outputs that it is right that its other end is output contact and three road positive and negative half-wave comparators link.
The described controller that has standby quick acting switching-off decision circuitry, its described magnetic flow convertor 17 inputs connect dropout separating brake circuit 16 outputs, the moving actuator 22 of circuit breaker that connects moving unshakable in one's determination of magnetic flow convertor 17 triggers the trigger pulse width T that magnetic flow convertor moves action unshakable in one's determination
PDetermine trigger pulse width 〉=T by its operating characteristics
PThe moving action unshakable in one's determination of magnetic flow convertor, trigger pulse width＜T
pThe moving iron core of magnetic flow convertor is failure to actuate;
T
PSet point is 2～5ms, and preferred value is 3ms.
The described controller that has standby quick disjunction decision circuitry, described collection voltage divider comprise that dividing potential drop part and signal acquisition part are grouped into, wherein:
The dividing potential drop part can adopt voltage grading resistor or voltage-stabiliser tube;
Collecting part can adopt resistance or adjustable potentiometer;
Gather a preferential fixing voltage grading resistor and the adjustable dividing potential drop collector that constitutes as the adjustable resistor of sampling resistor of adopting of voltage divider; The output pulse width of the positive and negative half-wave comparator of standby quick acting switching-off decision circuitry (15) is directly proportional with the voltage ratio of gathering voltage divider; adjust voltage ratio, the output pulse width of the positive and negative half-wave comparator when making the electrical network major loop reach the overcurrent protection definition value is greater than T
PValue.
The described controller that has standby quick acting switching-off decision circuitry, the benchmark voltage V of the positive half wave comparator of its standby quick acting switching-off decision circuitry 15
Ref+For+6V～+ 1V, the benchmark voltage V of negative half-wave comparator
Ref-For-6V～-1V, the benchmark voltage V of positive half wave comparator
Ref+Preferred value is+5V the benchmark voltage V of negative half-wave comparator
Erf-Preferred value is-5V.
The utlity model has obvious effects:
1. the product after increasing standby quick acting switching-off decision circuitry on the intelligent universal low-voltage circuit breaker is compared with existing product, has improved reliability, and the probability of malfunction of disjunction will significantly reduce.
2. because the separating brake order of standby quick acting switching-off decision circuitry is directly by relatively hollow instrument transformer output voltage signal and judgment standard voltage produce, not only opening velocity is fast, and the disjunction precision is controlled easily, the separating brake pulse duration is calculated easily and is adjusted and determine, is difficult for causing the circuit breaker misoperation.
3. the product after increasing standby quick acting switching-off decision circuitry on the intelligent universal low-voltage circuit breaker, major loop overload or the little short-circuit conditions of electric current are still carried out by software by digital signal controller, have guaranteed the circuit breaker application flexibility; But under the big situation of short circuit current, standby quick acting switching-off decision circuitry can the instantaneous defencive function of bearing circuit breaker, less than 10ms execute protection separating brake in the time.
Description of drawings
Fig. 1 is the controller principle block diagram that has standby quick acting switching-off decision circuitry of the present utility model.
Fig. 2 is the standby quick acting switching-off decision circuitry of a three-phase of the present utility model theory diagram.
Fig. 3 is the electrical schematic diagram of the standby quick acting switching-off decision circuitry of three-phase of the utility model first embodiment.
Fig. 4 is the electrical schematic diagram of the standby quick acting switching-off decision circuitry of three-phase of the utility model second embodiment.
Fig. 5 is the standby quick acting switching-off decision circuitry of the utility model first embodiment right input waveform schematic diagram of positive and negative comparison circuit when the instrument transformer output voltage surpasses set point.
Fig. 6 is the standby quick acting switching-off decision circuitry of the utility model first embodiment right output waveform schematic diagram of positive and negative comparison circuit when the instrument transformer output voltage surpasses set point;
Fig. 7 is the right input waveform schematic diagram of the standby quick acting switching-off decision circuitry of the utility model first embodiment positive and negative comparison circuit when the instrument transformer output voltage is lower than set point.
Fig. 8 is the right output waveform schematic diagram of the standby quick acting switching-off decision circuitry of the utility model first embodiment positive and negative comparison circuit when the instrument transformer output voltage is lower than set point.
Embodiment
Below in conjunction with accompanying drawing the present utility model is further described below.
Fig. 1 has provided the controller principle block diagram that has standby quick acting switching-off decision circuitry of the present utility model, make the controller 1 of intelligent universal low-voltage circuit breaker have standby quick acting switching-off decision circuitry 15, standby quick acting switching-off decision circuitry 15 collects A from the threephase current transformer 21 that electrical network major loop 2 is socketed in the transformer lines, B, C three-phase alternating current signal, decision circuitry is monitored in real time, compare with reference voltage, when the load end of electrical network major loop 2 breaks down, judge fast, to dropout separating brake circuit 16 output dropout driving pulses, dropout separating brake circuit control magnetic flow convertor 18 triggers circuit breaker actuator 22 separating brakes.
The controller 1 that has standby quick disjunction decision circuitry described in the utility model is made up of keyboard and auxiliary circuits such as LCD 12, instrument transformer 21, discharge circuit 13, transducer signal Acquisition Circuit 14, standby quick acting switching-off decision circuitry 15, dropout separating brake circuit 16, magnetic flow convertor 17 and power supply 18 that digital signal controller 11, man-machine interface comprise.Instrument transformer 21 comprises hollow coil and fast saturable inductor, and hollow coil wherein provides basis for estimation for digital signal controller sends the separating brake order in normal operation, and its hollow coil output voltage signal waveform is sinusoidal wave.And fast saturable inductor generally is used for the power backup when controller power supply lost efficacy, and its tangible saturation characteristic can produce wave distortion when big electric current.When sending dropout separating brake control signal after 11 pairs of guard signal judgment processing of digital signal controller, the magnetic flow convertor 17 that control dropout separating brake circuit 16 drives circuit breaker produces the action of dropout separating brake.This is to realize the action of dropout separating brake, output pulse width set point T by hardware and software
PBe 3ms, have only the output pulse width 〉=3ms of digital signal controller 11 could drive the magnetic flow convertor action, and the action of dropout separating brake have the delay of tens ms even tens ms.And standby quick acting switching-off decision circuitry, be the hollow coil output voltage signal to be monitored by hardware circuit, when the coil output signal greater than set point and reach certain pulse duration, drives dropout separating brake circuit 16 makes the circuit breaker quick acting switching-off, the action of dropout separating brake has the delay of several ms.
Fig. 2 and Fig. 3 are the electrical schematic diagram of three-phase of the present utility model standby quick acting switching-off decision circuitry theory diagram and the standby quick acting switching-off decision circuitry of the utility model first embodiment three-phase.The standby quick acting switching-off decision circuitry of three-phase adopts two four comparator integrated devices, model is MCP6549, the mutually positive and negative half-wave comparator of A, B is to share one four comparator integrated device, and the mutually positive and negative half-wave comparator of C is to one four comparator integrated device of independent usefulness.Gathering voltage divider dividing potential drop part and collecting part forms, gather the input of voltage divider and gather electrical network major loop alternating current information in real time from the instrument transformer voltage signal output end of three-phase, after the dividing potential drop of information dividing potential drop part, the voltage signal at collecting part two ends is added to the comparison signal input of positive and negative half-wave comparator.Is that example is described with the mutually positive and negative half-wave comparator of A among Fig. 3 to circuit, the output of A phase hollow instrument transformer is through the A phase hollow instrument transformer input of the standby quick acting switching-off decision circuitry of three-phase, the voltage signal of gathering is added to dividing potential drop collector by dividing potential drop part and collecting part, after dividing potential drop collecting part be the sampling resistor two ends voltage signal be added to 2 pin of NIA comparator and 5 pin of NIB comparator, benchmark voltage V respectively
Ref+For+5V, V
Ref-For-5V ,+5V is added to 3 pin of NIA comparator, and-5V is added to 6 pin of NIA comparator, and the NIA comparator is output as 1 pin, and the NIB comparator is output as 7 pin, and 1 pin and 7 pin are connected on by R
7Output contact with drawing in logic of forming of C5, filtering output circuit.Positive half wave amplitude when the interchange comparison signal of sampling resistor output 〉+5V, or negative half-wave amplitude＜-during 5V,, be added to the input of dropout separating brake circuit in output circuit output negative pulse; But have only the negative pulse of driving pulsewidth 〉=3ms, the driving negative pulse that is added to the input of dropout separating brake circuit could trigger magnetic flow convertor and control the circuit breaker tripping separating brake.
Fig. 4 is the electrical schematic diagram of the standby quick acting switching-off decision circuitry of the utility model second embodiment three-phase.Three comparators of separating brake decision circuitry are right; MCP6549 type four road comparator integrated package N1A and N1B comparator are to finishing the short-circuit protection mutually to A; N2A and N2B comparator are to finishing the short-circuit protection mutually to B, and the comparator of another MCP6549 type integrated package is finished the short-circuit protection mutually to C to N1A and N1B.With A phase defencive function is example, and its defencive function implementation procedure is as follows: A phase hollow instrument transformer output is through the A phase hollow instrument transformer input of the standby quick acting switching-off decision circuitry of three-phase, and the voltage signal of gathering is added to by fixing R
1With adjustable resistor R
2The voltage divider that constitutes, the comparison signal of voltage divider output is added to 2 pin of NIA comparator and 5 pin of NIB comparator respectively, and benchmark voltage is V
Ref+And V
Ref-, V
Ref+Benchmark voltage is added to 3 pin of NIA comparator, V
Ref-Benchmark voltage is added to 6 pin of NIA comparator.The output circuit of the standby quick acting switching-off decision circuitry of three-phase is logic OR circuit DIA, DIB, the DIC that three three inputs and gate device constitute, three with the gate device model be 7411.The NIA comparator is output as 1 pin, and the NIB comparator is output as 7 pin, and 1 pin is connected DIA-1 pin, DIB-8 pin with 7 pin, when the positive half wave amplitude of the comparison signal of voltage divider output〉V
Ref+, or negative half-wave amplitude＜V
Ref-The time, then in the negative pulse of output circuit DIC-13 pin output driving dropout separating brake, be added to the input of dropout separating brake circuit, as pulsewidth 〉=3ms, then trigger magnetic flow convertor and drive the action of circuit breaker actuator.
Fig. 5～Fig. 8 is the first embodiment comparison signal and signal output waveform schematic diagram.
As everyone knows, the electrical network major loop is an alternating current, the voltage signal of hollow instrument transformer secondary induction also is an AC signal, so the output of A phase instrument transformer is ac voltage signal, this voltage signal is through R1 and R2 resitstance voltage divider dividing potential drop, real-time ac voltage signal after the dividing potential drop, divide two-way to deliver to comparator N1A-2 pin and N1B-5 pin, with N1A-3 pin and N1B-6 pin+5V and-5V benchmark voltage compares, if alternating voltage is the positive half wave voltage magnitude of signal relatively 〉+5V or negative half-wave voltage amplitude＜-during 5V, the comparative result of N1A-1 pin and the output of N1B-7 pin becomes low level by high level respectively.
When the electrical network major loop breaks down, the instrument transformer output voltage surpasses setting, makes the positive half wave voltage magnitude that is added to comparator N1A 〉+5V, and in the half period greater than the time t of+5V
13ms, then comparator N1A-1 pin output width〉the dropout negative pulse of 3ms; Perhaps be added to the negative half-wave comparison signal voltage magnitude of comparator N1B＜-5V, and in the half period less than the time t of-5V
23ms, then comparator N1B-7 pin output width〉the dropout low level negative pulse of 3ms.The standby quick acting switching-off decision circuitry of the utility model embodiment is worked as the instrument transformer output voltage and is surpassed set point and pulse duration t
1〉=3ms and t
2During 〉=3ms, input waveform that positive and negative comparison circuit is right and output waveform are as shown in Figure 5 and Figure 6.N1A-1 pin or N1B-7 pin output comparative result draw in logic by R7 and C5, the filter output contact exports by logical, forms pulse duration t
1The negative pulse of 3ms, in fact when first pulsewidth forms greater than the negative pulse of 3ms, deliver to dropout separating brake circuit control end, dropout separating brake circuit can controlled execution dropout separating brake, finishes defencive function.
The standby quick acting switching-off decision circuitry of the utility model embodiment does not surpass setting but pulse duration t when the instrument transformer output voltage surpasses setting or instrument transformer output voltage
3＜3ms and t
4During＜3ms, input waveform that positive and negative comparison circuit is right and output waveform are as shown in Figure 7 and Figure 8.N1A-1 pin and N1B-7 pin output comparative result draw in logic by R7 and C5, the filter output contact exports no dropout low level output or the dropout low level negative pulse width t that exports by logical
3And t
4＜3ms is not enough to drive the magnetic flow convertor action, and magnetic flow convertor also can't trigger circuit breaker actuator, and then circuit breaker still keeps "on" position.
Comparator to N2A and N2B finish to B mutually the defencive function implementation procedure with the A phase.
Comparator to N2A and N2B finish to C mutually the defencive function implementation procedure with the A phase.
Three tunnel positive and negative half-wave comparator of the standby quick acting switching-off decision circuitry 15 of second embodiment all is made up of a positive half wave comparator and a negative half-wave comparator 151,152,153, and the benchmark voltage of positive half wave comparator is V
Ref+, the benchmark voltage of negative half-wave comparator is V
Ref-The input of positive and negative half-wave comparator also is connected the output of adjustable voltage divider, adjustable voltage divider comprises a fixed resistor and an adjustable resistor, and three tunnel positive and negative half-wave comparator is to 151,152, the 153 all-wave voltages of monitoring A, B, C three-phase respectively.And the comparator of every phase is to implementing monitoring to the positive and negative half-wave of this phase respectively, six comparator output pins are connected the input of DIA and DIB logical, and realize the function of logical output low level through DIC, and when fault-free, each comparator is output as high level.When three road positive and negative half-wave comparator centerings, arbitrary comparator output low level undersuing, standby quick acting switching-off decision circuitry 15 outputs are the low level negative pulse, are added to the dropout separating brake circuit of controller, if this low level negative pulse width is greater than T
PValue, T
PSet point is 2～5ms, is preferably 3ms, can drive the action of dropout separating brake circuit triggers magnetic flow convertor, realizes the short-circuit protection of three-phase.
The protective current value of electrical network major loop is looked major loop and is allowed the size of current passed through, and the parameter characteristic that cooperates intelligent controller to protect by digital signal controller DSC11 software is simultaneously decided, and generally is slightly larger than the short-circuit protection set point of software set.The size of current that major loop passes through has been determined the setting of hollow instrument transformer output voltage signal amplitude, has also just determined to trigger the setting of the comparative voltage signal amplitude of standby quick acting switching-off decision circuitry.The setting of three-phase comparative voltage signal amplitude can be adjusted by the resistance ratio of adjusting between R1 and R2, R3 and R4, R5 and the R6.
Dispose a cover stand-by protection sub-gate control circuit on the intelligent controller, reliability height, opening velocity be near in 10ms, like this, and because of circuit breaker time-delay disjunction even probability of malfunction and economic loss that can not disjunction will significantly reduce.
Claims (7)
1. the controller that has standby quick acting switching-off decision circuitry, form by digital signal controller DSC (11), man-machine interface (12), discharge circuit (13), instrument transformer signal source output (14), dropout separating brake circuit (16), magnetic flow convertor (17) and power supply auxiliary circuits such as (18), it is characterized in that a standby quick acting switching-off decision circuitry (15) in addition, wherein:
Described standby quick acting switching-off decision circuitry (15) by three the tunnel just is, negative half-wave comparator is to (151), (152), (153) and in logic draw, filter circuit (154) and three collection voltage dividers (155), (156), (157) form, three the tunnel just, negative half-wave comparator is to (151), (152), (153) input is respectively through gathering voltage divider (155), (156), (157) connect A, B, C three-phase instrument transformer output voltage signal source (141), (142), (143), three the tunnel just, negative half-wave comparator is to (151), (152), (153) output parallel connection, this parallel connection point connection is drawn in logic, filter circuit (154) becomes the output of standby quick acting switching-off decision circuitry (15), the control end that it connects the dropout separating brake circuit (16) of the controller (1) that has standby quick acting switching-off decision circuitry draws in logic, another termination power V of filter circuit (154)
CC
Described instrument transformer signal source output (14) comprises voltage signal source of being exported by the instrument transformer hollow coil and the current signal source of being exported by instrument transformer speed saturable inductor.
2. the described controller that has standby quick acting switching-off decision circuitry of root a tree name claim 1, three tunnel the positive and negative half-wave comparator that it is characterized in that standby quick acting switching-off decision circuitry (15) all is made up of a positive half wave comparator and a negative half-wave comparator (151), (152), (153), and the benchmark voltage of positive half wave comparator is V
Ref+, the benchmark voltage of negative half-wave comparator is V
Ref-, the input of positive and negative half-wave comparator also is connected the output of gathering voltage divider, and three tunnel positive and negative half-wave comparator is monitored the all-wave voltage of A, B, C three-phase respectively to (151), (152), (153);
Described three tunnel positive and negative half-wave comparator constitutes adopting integrated device or resolution element, preferentially adopts many comparators, low-power consumption, integrated device that actuating force is strong.
3. the controller that has standby quick acting switching-off decision circuitry according to claim 1 and 2, the three road positive and negative half-wave comparators that it is characterized in that standby quick acting switching-off decision circuitry (15) to the comparator of (151), (152), (153) for opening leakage output comparator, its output circuit be out to leak output comparator and draw in logic, filter circuit (154) cooperates the logical output that constitutes, also can adopt common comparator and logical AND gate digital circuit to cooperate to constitute logical to export;
As preferably, adopt open output comparator with Louing and draw in logic, filter circuit (154) cooperates the formation logical to export.
4. root a tree name claim 1 or the 2 described controllers that have standby quick acting switching-off decision circuitry, it is characterized in that the drawing in logic of standby quick acting switching-off decision circuitry (15), filter circuit (154) be made up of logic voltage pull-up resistor and filter capacitor, logic voltage pull-up resistor one end connects power Vcc, and three pairs of outputs that it is right that its other end is output contact and three road positive and negative half-wave comparators link.
5. the controller that has standby quick acting switching-off decision circuitry according to claim 1, it is characterized in that described magnetic flow convertor (17) input connects dropout separating brake circuit (16) output, the moving actuator (22) of circuit breaker that connects moving unshakable in one's determination of magnetic flow convertor (17) triggers the trigger pulse width T that magnetic flow convertor moves action unshakable in one's determination
PDetermine trigger pulse width 〉=T by its operating characteristics
PThe moving action unshakable in one's determination of magnetic flow convertor, trigger pulse width＜T
PThe moving iron core of magnetic flow convertor is failure to actuate;
T
PSet point is 2～5ms, and preferred value is 3ms.
6. root a tree name claim 1 or the 2 described controllers that have standby quick acting switching-off decision circuitry is characterized in that described collection voltage divider comprises that dividing potential drop part and signal acquisition part are grouped into, wherein:
The dividing potential drop part can adopt voltage grading resistor or voltage-stabiliser tube;
Collecting part can adopt resistance or adjustable potentiometer;
Gather a preferential fixing voltage grading resistor and the adjustable dividing potential drop collector that constitutes as the adjustable resistor of sampling resistor of adopting of voltage divider; The output pulse width of the positive and negative half-wave comparator of standby quick acting switching-off decision circuitry (15) is directly proportional with the voltage ratio of gathering voltage divider; adjust voltage ratio, the output pulse width of the positive and negative half-wave comparator when making the electrical network major loop reach the overcurrent protection definition value is greater than T
PValue.
7. the described controller that has standby quick acting switching-off decision circuitry of root a tree name claim 2 is characterized in that the benchmark voltage V of the positive half wave comparator of standby quick acting switching-off decision circuitry (15)
Ref+For+6V～+ 1V, the benchmark voltage V of negative half-wave comparator
Ref-For-6V～-1V, the benchmark voltage V of positive half wave comparator
Ref+Preferred value is+5V the benchmark voltage V of negative half-wave comparator
Ref-Preferred value is-5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201413483U CN201038719Y (en) | 2006-12-22 | 2006-12-22 | Controller possessing spare quick brake-separating judging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201413483U CN201038719Y (en) | 2006-12-22 | 2006-12-22 | Controller possessing spare quick brake-separating judging circuit |
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| CN201038719Y true CN201038719Y (en) | 2008-03-19 |
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| CNU2006201413483U Expired - Fee Related CN201038719Y (en) | 2006-12-22 | 2006-12-22 | Controller possessing spare quick brake-separating judging circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562095B (en) * | 2008-04-29 | 2011-06-22 | 上海磊跃自动化设备有限公司 | Intelligent controller |
| CN104217871A (en) * | 2013-06-05 | 2014-12-17 | 施耐德电器工业公司 | Multifunctional isolating switch |
| CN106971925A (en) * | 2017-04-21 | 2017-07-21 | 陈志刚 | A kind of intelligent breaker |
| CN107681627A (en) * | 2017-11-21 | 2018-02-09 | 雷顿电气科技有限公司 | The current protecting circuit of control and protective switching device |
| CN107947113A (en) * | 2017-11-22 | 2018-04-20 | 江苏创能电器有限公司 | One kind protection drive module |
| CN109995004A (en) * | 2019-04-22 | 2019-07-09 | 浙江思创电力科技股份有限公司 | A kind of residual current acting tripper |
| CN113447703A (en) * | 2020-03-24 | 2021-09-28 | 天津首瑞智能电气有限公司 | Current monitoring device |
-
2006
- 2006-12-22 CN CNU2006201413483U patent/CN201038719Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562095B (en) * | 2008-04-29 | 2011-06-22 | 上海磊跃自动化设备有限公司 | Intelligent controller |
| CN104217871A (en) * | 2013-06-05 | 2014-12-17 | 施耐德电器工业公司 | Multifunctional isolating switch |
| CN106971925A (en) * | 2017-04-21 | 2017-07-21 | 陈志刚 | A kind of intelligent breaker |
| CN107681627A (en) * | 2017-11-21 | 2018-02-09 | 雷顿电气科技有限公司 | The current protecting circuit of control and protective switching device |
| CN107947113A (en) * | 2017-11-22 | 2018-04-20 | 江苏创能电器有限公司 | One kind protection drive module |
| CN109995004A (en) * | 2019-04-22 | 2019-07-09 | 浙江思创电力科技股份有限公司 | A kind of residual current acting tripper |
| CN113447703A (en) * | 2020-03-24 | 2021-09-28 | 天津首瑞智能电气有限公司 | Current monitoring device |
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