CN102332369B - Automatic reclosing control circuit with communication function in miniature circuit breaker - Google Patents
Automatic reclosing control circuit with communication function in miniature circuit breaker Download PDFInfo
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- CN102332369B CN102332369B CN201110309235.5A CN201110309235A CN102332369B CN 102332369 B CN102332369 B CN 102332369B CN 201110309235 A CN201110309235 A CN 201110309235A CN 102332369 B CN102332369 B CN 102332369B
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Abstract
The invention provides an automatic reclosing control circuit with a communication function in a miniature circuit breaker. The circuit comprises a power supply unit, a control unit, a relay switch unit, a control sampling unit, a fault state reading unit and a communication unit, wherein the control unit is used for finishing the analysis operation of a sampled signal and sending a control instruction; the relay switch unit is used for controlling the switching on and off of a coil switch of a relay; the control sampling unit is used for sampling parameters including automatic reclosing times, automatic reclosing times effective acting time and automatic reclosing time delay which are set by a user, converting the parameters into a voltage signal and outputting the voltage signal to the control unit; the fault state reading unit is used for reading a state signal of the miniature circuit breaker and outputting the state signal to the control unit; and the communication unit is used for receiving the state signal of the miniature circuit breaker, which is transmitted by the control unit, and transmitting the state signal to far-end communication equipment. Compared with the prior art, the invention has the advantages that: the circuit has the communication function and high electromagnetic interference resistance, a power supply part of the circuit is high in efficiency and reliability and low in calorific value, and the control parameters can be set in a humanized mode.
Description
Technical field
The present invention relates to a kind of automatic reclosing control circuit being applied in miniature circuit breaker with communication function.
Background technology
Along with the standardization of circuit breaker and the raising of stability, its purposes is increasingly extensive, can be applicable to distribution occasions all in house, industry and business, and it is a kind of most widely used safeties; Meanwhile, be also a kind of important automatic control equipment.It mainly contains two purposes: the one, and control action, drops into or cuts out a part of equipment or circuit according to the needs of operation of power networks; The 2nd, protective effect; when force device or line failure; can be automatically selectively fault element and circuit excises and be separated from the system of operation rapidly, avoid fault element to continue sustain damage, and guarantee that fault-free partly can recover rapidly normal.
The low-voltage circuit breaker of generally applying of take is example, and low-voltage circuit breaker is the critical elements that plays break-make control and protective effect in low-voltage distribution system.At present, extensively adopt circuit breaker in order to protect the circuit in electric power system to be without prejudice in society in the low-voltage distribution system of using, when the faults such as generation phase fault, power failure in short-term, circuit breaker will automatic trip, to realize the task of protection.This technical scheme though have the defencive function to supply line and equipment thereof, needs manual closing operation power transmission after Failure elimination, so there is the defect of power transmission and waste of manpower in time.
Thus, industry has proposed again a kind of relay protection with automatic reclosing function, and it closes a floodgate after can realizing fault trip again, but because relay protection is because being assemblied in low-voltage distribution system, cannot monitoring breaker real-time status.
Summary of the invention
The object of the present invention is to provide a kind of automatic reclosing control circuit being applied in miniature circuit breaker with communication function, for solving after prior art fault actions automatic reclosing in time and problem that cannot monitoring breaker real-time status.
The invention provides in a kind of miniature circuit breaker with the automatic reclosing control circuit of communication function, comprising: power supply unit, for by rectification and level conversion, provides applicable power supply; Control unit, is connected with described power supply unit, for completing the analytic operation of sampled signal, and sends corresponding control command; Relay switch unit, is connected with described power supply unit and controlled by described control unit, opening, turn-offing for the coil switch of control relay; Control sampling unit, the parameter that comprises automatic reclosing number of times, automatic reclosing number of times effective acting time and automatic reclosing time delay of setting for the user that samples, changes into voltage signal by described parameter and exports described control unit to; Malfunction reading unit, for reading the status signal of miniature circuit breaker, and exports described status signal to described control unit; Communication unit, receives the status signal of the miniature circuit breaker transmit from described control unit, and by described status signal transmission the communication equipment to far-end, realize far-end monitoring.
Alternatively, the level conversion of described power supply unit comprises: civil power alternating voltage is converted to DC low-voltage.
Alternatively, described DC low-voltage comprises 5V and 24V.
Alternatively, described power supply unit comprises: be positioned at front end and first, second piezo-resistance and safety electric capacity parallel with one another; Half-wave rectifying circuit, comprising: the resistance that rectifier diode is connected with described rectifier diode; Voltage stabilizing circuit, comprising: the first voltage-stabiliser tube, the second resistance and the first triode; Lay respectively at first, second energy storage at described voltage stabilizing circuit two ends; Lay respectively at described voltage stabilizing circuit two ends, first, second protection component in parallel with described first, second storage capacitor; Power MOS pipe; Gate driver circuit, comprising: the second voltage-stabiliser tube, the divider resistance being connected with described voltage-stabiliser tube; The power MOS pipe grid voltage being connected with described gate driver circuit is clamped down on circuit, comprising: the second triode, the 3rd voltage-stabiliser tube and the divider resistance being connected with described the second triode.
Alternatively, described control unit comprises microcontroller chip.
Alternatively, described relay switch unit comprises double switch circuit; Each path switching circuit comprises electric capacity, triode, relay and resistance; Each path switching circuit is controlled by described control unit all, the opening, turn-off of the contact of the described relay according to the control command of described control unit and in control switch circuit.
Alternatively, described control sampling unit comprises: automatic reclosing number of times circuit, automatic reclosing number of times circuit effective acting time and automatic reclosing delay circuit; Described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit include: as potentiometer and resistance and the decoupling capacitor in parallel with described resistance of dividing potential drop; The voltage signal of getting on resistance described in each transfers to described control unit.
Alternatively, described automatic reclosing control circuit also comprises the circuit state indicating member being connected with described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit, described circuit state indicating member is also controlled by described control unit, is used to indicate the state of described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit.
Alternatively, described circuit state indicating member comprises LED.
Alternatively, described malfunction reading unit comprises two-way malfunction reading circuit; Each road malfunction reading circuit comprises electric capacity and resistance; Each road malfunction reading circuit reads the status signal of miniature circuit breaker by potential difference between input voltage and earth potential, and exports described status signal to described control unit.
Alternatively, the status signal that described in each road, malfunction reading circuit reads miniature circuit breaker by potential difference between input voltage and earth potential comprises: if potential difference is high potential between input voltage and earth potential, represent normal signal; If potential difference is electronegative potential between input voltage and earth potential, represent fault-signal.
Alternatively, described communication unit comprises communication chip, and described communication chip is converted to differential signal by the status signal that is received from the miniature circuit breaker of described control unit, and by described differential signal transmission to far-end.
The invention provides and be a kind ofly applied to the automatic reclosing control circuit tool with communication function in miniature circuit breaker and have the following advantages: circuit power provides standard output, and efficiency is high, generate heat low, the strong feature of carrying load ability; Controlling parameter can set in hommization, controls accurately, convenient and reliable; Anti-electromagnetic interference performance is strong; And band communications function, make far-end monitoring breaker real-time status become possibility, improved the intelligent level of product, greatly expanded the application scenarios of miniature circuit breaker.
Accompanying drawing explanation
Fig. 1 is the structured flowchart in one embodiment of automatic reclosing control circuit of band communication function of the present invention.
Fig. 2 to Fig. 6 is the automatic reclosing control circuit of band communication function of the present invention circuit diagram in specific embodiment.
Embodiment
The present inventor finds: at the existing automatic reclosing control circuit that is applied to miniature circuit breaker, exist and control inconvenience, reliability is poor, and does not have communications function and problems such as state that cannot Real-Time Monitoring circuit breaker.
Therefore, the present inventor improves prior art, has proposed a kind of automatic reclosing control circuit being applied in miniature circuit breaker with communication function.
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
Refer to Fig. 1, its automatic reclosing control circuit that has shown band communication function of the present invention structured flowchart in one embodiment.As shown in Figure 1, described automatic reclosing control circuit comprises: power supply unit 11, control unit 12, relay switch unit 13, control sampling unit 14, malfunction reading unit 15, communication unit 16 and circuit state indicating member 17.
Below above-mentioned unit is described in detail.
Power supply unit 11, for by rectification and level conversion, to offer the applicable power supply of unit.In the present embodiment, the level conversion of power supply unit 11 comprises: what the civil power alternating voltage that is for example 110V, 220V or 230V was converted to direct current is for example the low-voltage of 3.3V, 5V, 12V or 24V, mode by PWM is to controlling such as devices such as power device metal-oxide-semiconductors, can in compared with wide-voltage range, provide standard output, there is the features such as conversion efficiency is high, low, the wide input voltage range of generating heat, carrying load ability is strong, drive current is large.
Control unit 12, is connected with power supply unit, for completing the analytic operation of sampled signal, and sends corresponding control command.In the present embodiment, control unit 12 mainly comprises the microcontroller chip of high-performance low-power-consumption.
Relay switch unit 13, is connected with power supply unit and controlled by described control unit, opening, turn-offing for the coil switch of control relay.In the present embodiment, relay switch unit 13 adopts high-performance ultrathin high-current relay, has and opens, turn-offs reliably, and driving force is strong, and transient current can reach the features such as 5A, long service life.
Control sampling unit 14, the parameter that comprises automatic reclosing number of times, automatic reclosing number of times effective acting time and automatic reclosing time delay of setting for the user that samples, changes into voltage signal by described parameter and is sent to control unit 12.
Circuit state indicating member 17, be connected with described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and the described automatic reclosing delay circuit controlled in sampling unit 14, and controlled unit 12 controls, be used to indicate the state of described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit.In the present embodiment, circuit state indicating member 17 comprises the LED lamp indicating circuit state that utilizes.In concrete application, LED lamp can be useful on the multiple indication form that represents each state, and for example lamp Chang Liang, lamp length are gone out, and glimmers etc. according to different lamp sudden strain of a muscle frequencies, numerous at this, those skilled in the art still can expand on this basis.
Malfunction reading unit 15, for reading the status signal of miniature circuit breaker, and exports described status signal to control unit 12.In the present embodiment, fault-signal and normal signal are represented by the high potential reading and electronegative potential respectively.
Communication unit 16, the status signal of the miniature circuit breaker that reception transmits from control unit 12, and by described status signal transmission to establishing a communications link (by network or coffret, the communication equipment (for example, as the host computer in Fig. 1) of far-end RS485 for example), realizes far-end monitoring.In the present embodiment, the status signal of described miniature circuit breaker can comprise the state information such as operational factor, fault type, setup parameter of miniature circuit breaker.
Like this, utilize communication unit 16, can make far-end monitoring breaker real-time status become possibility by the status signal instantaneous transmission of described miniature short-circuiting device to far-end, improved the intelligent level of product.In addition, owing to possessing remote monitoring function, and immediately know and hold respective dimension and repair when monitoring miniature circuit breaker and break down, greatly expanded the application scenarios of miniature circuit breaker, make miniature circuit breaker can be applied to following scene: the place that 1, need to realize intelligent networking; 2, unattended place; 3, the inaccessible place of personnel; 4, the insulation level of circuit and equipment is subject to the larger occasion of weather condition (temperature, humidity) impact; 5, long-time power-off meeting causes heavy losses or causes the occasion of high maintenance cost.Above-mentioned scene concrete example is as intelligent grid, public illumination, tunneling technique system, refrigerating system, pumping plant, radio reception station, TV broadcasting station, mobile base station etc.
Please continue to refer to the 2nd figure to Fig. 6, the circuit diagram of its automatic reclosing control circuit that has shown band communication function of the present invention in specific embodiment.
In power supply unit 11, comprising: be positioned at front end and piezo-resistance RV1, RV2, safety capacitor C 5 parallel with one another; The resistance that rectifier diode is connected with described rectifier diode forms half-wave rectifying circuit; Voltage-stabiliser tube D1, resistance R 8 and triode Q4 form voltage stabilizing circuit, wherein, a termination power VCC of voltage-stabiliser tube D1, the base stage of triode Q4 is connected with the other end of voltage-stabiliser tube D1, the first end of resistance R 8, the emitter utmost point ground connection GND of triode Q4, the collector electrode of triode Q4 is connected with the second end of resistance R 8; Capacitor C 3, C4 lay respectively at described voltage stabilizing circuit two ends as energy-storage travelling wave tube, wherein, and a termination power VCC of capacitor C 3, other end ground connection GND; One termination power VCC of capacitor C 4, the other end is connected with the collector electrode of triode Q4.Transient Suppression Diode TVS pipe D6, D7 are that protected location lays respectively at described voltage stabilizing circuit two ends and in parallel with first, second storage capacitor C3, C4; Fast power metal-oxide-semiconductor Q1; Resistance R 1, R3, R6, voltage-stabiliser tube D4 form the gate driver circuit of fast power metal-oxide-semiconductor Q1; Resistance R 2, R4, R9, R10, voltage-stabiliser tube D2 and triode Q5 form the PWM drive circuit of fast power metal-oxide-semiconductor Q1.
Control unit 12 comprises microcontroller chip U1 and the decoupling capacitor C6 being connected with microcontroller chip U1.
Relay switch unit 13 comprises double switch circuit, and wherein, resistance R 5, capacitor C 1, triode Q3, relay K 1 form first via switching circuit, resistance R 7, and capacitor C 2, triode Q2, relay K 2 forms the second path switching circuit.Each path switching circuit wherein all controlled unit 12 is controlled, the opening, turn-off of the contact of the described relay according to the control command of control unit 12 and in control switch circuit.
Controlling sampling unit 14 comprises: automatic reclosing number of times circuit, automatic reclosing number of times circuit effective acting time, automatic reclosing delay circuit and the circuit state indicating circuit for being connected with above-mentioned each circuit.Particularly, potentiometer RP1, resistance R 21, capacitor C 9 form automatic reclosing number of times circuit, resistance R 21 and capacitor C 9 are parallel between signal output part Number and ground connection GND, and the stiff end of potentiometer RP1 meets respectively power supply VCC and ground connection GND, and sliding end is connected with signal output part Number; Potentiometer RP2, resistance R 22, capacitor C 10 form automatic reclosing number of times circuit effective acting time, resistance R 22 and capacitor C 10 are parallel between signal output part Duration and ground connection GND, the stiff end of potentiometer RP2 meets respectively power supply VCC and ground connection GND, and sliding end is connected with signal output part Duration; Potentiometer RP3, resistance R 23, capacitor C 11 form automatic reclosing delay circuit, resistance R 23 and capacitor C 11 are parallel between signal output part Delay Time and ground connection GND, the stiff end of potentiometer RP3 meets respectively power supply VCC and ground connection GND, and sliding end is connected with signal output part Delay Time.
Circuit state indicating member 17, consists of LED and resistance R 12, for receiving the control command of microcontroller chip U1.
Malfunction reading unit 15 comprises two-way malfunction reading circuit, wherein, resistance R 13, R14, R17, R19, capacitor C 12 form first via malfunction reading circuit, and comprise input signal end Y1 and the output signal end Y1 input being connected with microcontroller chip U1; Resistance R 15, R16, R18, R20, capacitor C 13 is an other road, and comprises input signal end Y2 and the output signal end Y2 input being connected with microcontroller chip U1.
Communication unit 16 comprises communication chip U2 and the peripheral circuit of the communication chip U2 that consists of resistance R 25, R24, capacitor C 7.Communication chip U2 is converted to differential signal by the status signal that is received from microcontroller chip U1 and passes the miniature circuit breaker come, and by described differential signal transmission to far-end.
Application has the automatic reclosing control circuit of circuit structure as shown in Figure 2, and its operation principle is as follows:
In power supply unit 11, fast power metal-oxide-semiconductor Q1 conducting under the driving of the gate driver circuit of resistance R 1, R3, R6, voltage-stabiliser tube D4, storage capacitor C4 charging, resistance R 2, R4, R9, R10, voltage-stabiliser tube D2 and triode Q5 form the PWM drive circuit of fast power metal-oxide-semiconductor Q1, turn-on transistor Q5 in the frequency of setting, makes storage capacitor C4 maintain the charging voltage of certain numerical value; The voltage stabilizing circuit that voltage-stabiliser tube D1, resistance R 8 and triode Q4 form is further reduced to microcontroller chip U1 acceptable scope, the storage capacitor that C3 is voltage stabilizing circuit the direct voltage above storage capacitor C4; Transient Suppression Diode TVS pipe D6, D7 are as protection component.Piezo-resistance RV1, RV2 and safety capacitor C 5, for circuit EMC design needs, improve anti-electromagnetic interference performance.
In relay switch unit 13, resistance R 5, capacitor C 1, triode Q3 is transistor switching circuit, control signal is sent by microcontroller chip U1, the opening, turn-off of control relay K1 contact.Resistance R 7, capacitor C 2, triode Q2 is transistor switching circuit, control signal is sent by microcontroller chip U1, the opening, turn-off of control relay K2 contact.
Control in sampling unit 14, resistance R 21 and potentiometer RP1 dividing potential drop, capacitor C 9 decouplings, the voltage signal above R21 is obtained by microcontroller chip U1AD channel sample; Resistance R 22 and potentiometer RP2 dividing potential drop, capacitor C 10 decouplings, the voltage signal above R22 is obtained by microcontroller chip U1 AD channel sample; Resistance R 23 and potentiometer RP3 dividing potential drop, capacitor C 11 decouplings, the voltage signal above R23 is obtained by microcontroller chip U1 AD channel sample.
Malfunction reading unit 15, for first via malfunction reading circuit, for example, when reading between the input voltage of input signal end Y1 and earth potential that potential difference is high potential (VCC level), represents normal signal; For example, when reading between the input voltage of input signal end Y1 and earth potential that potential difference is electronegative potential (zero level), represent fault-signal.For another line state reading circuit, for example, for example, when reading between the input voltage of input signal end Y2 and earth potential that potential difference is high potential (VCC level) or electronegative potential (zero level), represent respectively different signals.In addition, the signal reading (high potential signal or low-potential signal) is by exporting microcontroller chip U1 to after resistance R 13, R14, R17, R19, and resistance R 13, R14, R17, R19 play current limliting, dividing potential drop effect.
In communication unit 16, by the I/O interface of microcontroller chip U1, by the real-time status transfer of data of miniature circuit breaker in communication chip U2, communication chip U2 changes into differential signal transmission status signal and for example goes out, to communication interface (RS485 interface), by described communication interface, complete and the communicating by letter of host computer, thereby realize the object at far-end Real-Time Monitoring.
Circuit state indicating member 17 consists of LED and resistance R 12.The square wave that control unit certain IO by MCU sends different frequency comes driving LED lamp to do quick flashing, slow sudden strain of a muscle, Chang Liang, the long different light on and off modes such as go out, and the different conditions of indication circuit, facilitates user to read to read at the scene the state of electrical network respectively
In sum, be provided by the inventionly applied to the automatic reclosing control circuit tool with communication function in miniature circuit breaker and have the following advantages: circuit power provides standard output, and efficiency is high, generate heat low, the strong feature of carrying load ability; Controlling parameter can set in hommization, controls accurately, convenient and reliable; Anti-electromagnetic interference performance is strong; And band communications function, make far-end monitoring breaker real-time status become possibility, improved the intelligent level of product, greatly expanded the application scenarios of miniature circuit breaker.
Above-described embodiment just lists expressivity principle of the present invention and effect is described, but not for limiting the present invention.Any person skilled in the art person all can without departing from the spirit and scope of the present invention, modify to above-described embodiment.Therefore, the scope of the present invention, should be as listed in claims.
Claims (10)
- In miniature circuit breaker with an automatic reclosing control circuit for communication function, it is characterized in that, comprising:Power supply unit, for by rectification and level conversion, provides applicable power supply; The level conversion of described power supply unit comprises: civil power alternating voltage is converted to DC low-voltage;Control unit, is connected with described power supply unit, for completing the analytic operation of sampled signal, and sends corresponding control command;Relay switch unit, is connected with described power supply unit and controlled by described control unit, opening, turn-offing for the coil switch of control relay;Described relay switch unit comprises double switch circuit;Each path switching circuit comprises electric capacity, triode, relay and the first resistance; Each path switching circuit is controlled by described control unit all, the opening, turn-off of the contact of the described relay according to the control command of described control unit and in control switch circuit;Control sampling unit, the parameter that comprises automatic reclosing number of times, automatic reclosing number of times effective acting time and automatic reclosing time delay of setting for the user that samples, changes into voltage signal by described parameter and exports described control unit to;Malfunction reading unit, for reading the status signal of miniature circuit breaker, and exports described status signal to described control unit;Communication unit, receives the status signal of the miniature circuit breaker transmit from described control unit, and by described status signal transmission the communication equipment to far-end, realize far-end monitoring.
- 2. the automatic reclosing control circuit with communication function according to claim 1, is characterized in that, described DC low-voltage comprises 5V and 24V.
- 3. the automatic reclosing control circuit with communication function according to claim 1 and 2, is characterized in that, described power supply unit comprises:Be positioned at front end and first, second piezo-resistance and safety electric capacity parallel with one another;Half-wave rectifying circuit, comprising: rectifier diode, the resistance being connected with described rectifier diode;Voltage stabilizing circuit, comprising: the first voltage-stabiliser tube, the second resistance and the first triode;Lay respectively at first, second storage capacitor at described voltage stabilizing circuit two ends;Lay respectively at described voltage stabilizing circuit two ends, first, second protection component in parallel with described first, second storage capacitor; Power MOS pipe;Gate driver circuit, comprising: the second voltage-stabiliser tube, the divider resistance being connected with described the second voltage-stabiliser tube;The power MOS pipe grid voltage being connected with described gate driver circuit is clamped down on circuit, comprising: the second triode, the 3rd voltage-stabiliser tube and the divider resistance being connected with described the second triode.
- 4. the automatic reclosing control circuit with communication function according to claim 1, is characterized in that, described control unit comprises microcontroller chip.
- 5. according to the automatic reclosing control circuit with communication function described in claim 1 or 4, it is characterized in that:Described control sampling unit comprises: automatic reclosing number of times circuit, automatic reclosing number of times circuit effective acting time and automatic reclosing delay circuit;Described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit include: as potentiometer and the second resistance and the decoupling capacitor in parallel with described the second resistance of dividing potential drop; The voltage signal of getting on the second resistance described in each transfers to described control unit.
- 6. the automatic reclosing control circuit with communication function according to claim 5, it is characterized in that, also comprise the circuit state indicating member being connected with described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit, described circuit state indicating member is controlled by described control unit, is used to indicate the state of described automatic reclosing number of times circuit, described automatic reclosing number of times circuit effective acting time and described automatic reclosing delay circuit.
- 7. the automatic reclosing control circuit with communication function according to claim 6, is characterized in that, described circuit state indicating member comprises LED.
- 8. according to the automatic reclosing control circuit with communication function described in claim 1 or 4, it is characterized in that:Described malfunction reading unit comprises two-way malfunction reading circuit;Each road malfunction reading circuit comprises electric capacity and resistance; Each road malfunction reading circuit reads the status signal of miniature circuit breaker by potential difference between input voltage and earth potential, and exports described status signal to described control unit.
- 9. the automatic reclosing control circuit with communication function according to claim 8, it is characterized in that, the status signal that each road malfunction reading circuit reads miniature circuit breaker by potential difference between input voltage and earth potential comprises: if potential difference is high potential between input voltage and earth potential, represent normal signal; If potential difference is electronegative potential between input voltage and earth potential, represent fault-signal.
- 10. according to the automatic reclosing control circuit with communication function described in claim 1 or 4, it is characterized in that, described communication unit comprises communication chip, described communication chip is converted to differential signal by the status signal that is received from the miniature circuit breaker of described control unit, and by described differential signal transmission to far-end.
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| CN201110309235.5A CN102332369B (en) | 2011-10-13 | 2011-10-13 | Automatic reclosing control circuit with communication function in miniature circuit breaker |
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| CN201110309235.5A CN102332369B (en) | 2011-10-13 | 2011-10-13 | Automatic reclosing control circuit with communication function in miniature circuit breaker |
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| CN103219700B (en) * | 2013-03-13 | 2015-07-22 | 安徽大学 | Remotely-controlled electronic equipment on-off device |
| CN103811232B (en) * | 2014-02-18 | 2015-09-16 | 华威博奥电力设备有限公司 | There is the miniature circuit breaker of automatically controlled logical circuit |
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| CN101741142A (en) * | 2009-12-03 | 2010-06-16 | 江苏科技大学 | Modular intelligent controller and controlling method of low-voltage circuit breaker dedicated to wind power generation |
| CN202405190U (en) * | 2011-10-13 | 2012-08-29 | 上海良信电器股份有限公司 | Automatic reclosing control circuit with communication function in miniature circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001069661A (en) * | 1999-08-31 | 2001-03-16 | Mitsubishi Electric Corp | Protection relay system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741142A (en) * | 2009-12-03 | 2010-06-16 | 江苏科技大学 | Modular intelligent controller and controlling method of low-voltage circuit breaker dedicated to wind power generation |
| CN202405190U (en) * | 2011-10-13 | 2012-08-29 | 上海良信电器股份有限公司 | Automatic reclosing control circuit with communication function in miniature circuit breaker |
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| JP特开2001-69661A 2001.03.16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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