CN103472354A - Switching-closing judging circuit of electric leakage reclosure breaker - Google Patents
Switching-closing judging circuit of electric leakage reclosure breaker Download PDFInfo
- Publication number
- CN103472354A CN103472354A CN 201310446905 CN201310446905A CN103472354A CN 103472354 A CN103472354 A CN 103472354A CN 201310446905 CN201310446905 CN 201310446905 CN 201310446905 A CN201310446905 A CN 201310446905A CN 103472354 A CN103472354 A CN 103472354A
- Authority
- CN
- China
- Prior art keywords
- diode
- optocoupler
- circuit
- electric leakage
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The invention discloses a switching-closing judging circuit of an electric leakage reclosure breaker. The switching-closing judging circuit comprises a rectifying circuit and an output circuit. The rectifying circuit comprises a first diode, a second diode, a third diode, a first resistor and a first capacitor. The output circuit comprises an optocoupler, a power source, a second resistor and a second capacitor. The anode electrode of the first diode, the anode electrode of the second diode and the anode electrode of the third diode are connected with phases of three-phase power respectively. The cathode electrode of the first diode, the cathode electrode of the second diode and the cathode electrode of the third diode are connected with a first electrode plate of the first capacitor and the anode electrode of the optocoupler through the first resistor. A second electrode plate of the first capacitor and the cathode electrode of the optocoupler are connected with a neutral line. A collector electrode of the optocoupler is connected to the power source through the second resistor, and an emitter electrode of the optocoupler is connected to a power source ground wire. The second capacitor is connected between the collector electrode of the optocoupler and the emitter electrode of the optocoupler. Electric leakage detecting is carried out on the three phases of the three-phase power at the same time, and therefore the accuracy of electric leakage detecting and the stability of an electric leakage detecting circuit are improved.
Description
Technical field
The present invention relates to the residual current circuit breaker technical field, relate in particular to a kind of electric leakage reclosing circuit-breaker switching on-off decision circuitry.
Background technology
Residual current circuit breaker is when in circuit, leakage current surpasses predetermined value, switch that can auto-action.Residual current circuit breaker is generally used for preventing that the person from getting an electric shock.
The divide-shut brake decision circuitry that existing electric leakage reclosing isolating switch adopts generally has two kinds, mechanical micro-moved decision circuitry and single-phase circuit breaker lower end power taking divide-shut brake decision circuitry.Front a kind of decision circuitry is higher to the requirement of machinery and fine motion, and when during machinery, error occurring, the divide-shut brake judgement is inaccurate; Rear a kind of decision circuitry has certain limitation, and when isolating switch is used in the single phase power supply system, and the power taking judgement just can't judge opening and closing state while not using mutually.
Summary of the invention
In view of this, the unstable error in judgement of bringing that the embodiment of the present invention provides a kind of reclosing circuit-breaker switching on-off decision circuitry of leaking electricity to overcome machinery, and the limitation of single-phase power taking sub-switch circuit.
The invention provides a kind of electric leakage reclosing circuit-breaker switching on-off decision circuitry, described circuit comprises: rectification circuit and output circuit, described rectification circuit comprises the first diode, the second diode, the 3rd diode, the first resistor and the first capacitor, and described output circuit comprises optocoupler, power supply, the second resistor and the second capacitor; Wherein
The anode of described the first diode, the second diode and the 3rd diode connects respectively the phase in three-phase electricity, and negative electrode is connected to the first pole plate of described the first capacitor and the anode of described optocoupler by described the first resistor;
The second pole plate of described the first capacitor and the negative electrode of described optocoupler are connected to the neutral line;
The collector of described optocoupler is connected to power supply by the second resistor, and the emitter of optocoupler is connected to power supply ground;
Described the second capacitor is connected between the collector and emitter of described optocoupler.
Further, in described rectification circuit, the first resistor is current-limiting resistor, for adjusting the curtage of described the first diode, the second diode and the 3rd diode cathode.
Further, in described rectification circuit the first capacitor for the AC compounent of filtering AC signal.
Further, the collector output divide-shut brake judgement signal of described optocoupler, while in described three-phase electricity, between at least one phase and the neutral line, having voltage, described divide-shut brake judgement signal is low level, indicating described electric leakage reclosing isolating switch is gate-dividing state, otherwise described divide-shut brake judgement signal is high level, indicating described electric leakage reclosing isolating switch is "on" position.
The embodiment of the present invention is carried out detection of electrical leakage when identical to each of three-phase electricity, overcome the unstable error in judgement of bringing of machinery, and the limitation of single-phase power taking sub-switch circuit, improved the accuracy of detection of electrical leakage and the stability of electric-leakage detection circuit.
The accompanying drawing explanation
Below will the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing, in accompanying drawing:
Fig. 1 is the schematic diagram of the applicable electric leakage reclosing controller of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the electric leakage reclosing circuit-breaker switching on-off decision circuitry of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, only show part related to the present invention in accompanying drawing but not full content.
Circuit provided by the invention can be used in residual current circuit breaker, mainly for detection of the leakage current in circuit, prevents that the person from getting an electric shock.The circuit that the embodiment of the present invention provides can be used for leaking electricity in reclosing controller usually, as shown in Figure 1, described electric leakage reclosing controller comprises micro-control unit, the voltage sample unit, current sampling unit, spontaneous electric power supply unit, the divide-shut brake judging unit, the keystroke handling unit, display processing unit and protection output unit, the divide-shut brake decision circuitry that the circuit that the embodiment of the present invention provides is the divide-shut brake judging unit, the Output rusults of described circuit shows and exports after being processed by microprocessing unit, thereby avoided personal electric shock, can remind the staff to take next step safeguard procedures simultaneously.
It is below the specific embodiment of a kind of reclosing circuit-breaker switching on-off decision circuitry of leaking electricity in divide-shut brake judging unit in Fig. 1.
Fig. 2 is a kind of electric leakage reclosing circuit-breaker switching on-off decision circuitry schematic diagram in the embodiment of the present invention.As shown in the figure, described electric leakage reclosing circuit-breaker switching on-off decision circuitry comprises rectification circuit and output circuit, wherein, rectification circuit comprises the first diode D1, the second diode D2, the 3rd diode D3, the first resistor R1 and the first capacitor C1, and described output circuit comprises optocoupler P1, power supply VCC, the second resistor R2 and the second capacitor C2.
In Fig. 2, UA, UB, UC is respectively the leading-out terminal of each phase in three-phase and four-line, UN is the neutral line, the first diode D1 in described rectification circuit, the anode of the second diode D2 and the 3rd diode D3 is connected respectively the phase in three-phase electricity, for example, the alternating current of the anodic bonding UA end of the first diode D1, the second diode D2 connects the alternating current of UB end, the 3rd diode D3 connects the alternating current of UC end, the first diode D1, the negative electrode of the second diode D2 and the 3rd diode D3 all links together, and be connected to the anode of optocoupler P1 in the first pole plate of the first capacitor C1 and output circuit by the first resistor R1, in described rectification circuit in the second pole plate of the first capacitor C1 and output circuit the negative electrode of optocoupler P1 all be connected to the neutral line, the collector of described optocoupler P1 is connected to power supply (VCC) by the second resistor R2, the emitter of optocoupler (P1) is connected to power supply ground, preferably, power supply VCC can be+5V, described the second capacitor (C2) is connected between the collector and emitter of described optocoupler (P1).
In foregoing circuit, the first resistor R1 is current-limiting resistor, the first resistor R1 can be a resistor, can be also series connection and/or the parallel connection of a plurality of resistors, the first resistor R1 is for adjusting the curtage of described the first diode D1, the second diode D2 and the 3rd diode D3 negative electrode output, prevents from that transient voltage is too high or electric current is too high the back circuit is damaged.The first capacitor C1, for the AC compounent of filtering AC signal, guarantees that the input end of output circuit is direct current signal,, after the first capacitor C1, only has direct current signal to enter the anode of optocoupler P1.The second resistor R2 is pullup resistor, connects power supply VCC and also can play metering function, can prevent from disturbing, and has increased the stability of circuit simultaneously.
In foregoing circuit, output circuit, from the collector OUT output signal of optocoupler P1, then carries out subsequent treatment by this signal access microprocessing unit.
Principle of work of the present invention is as follows:
While in described three-phase electricity, between at least one phase and the neutral line, having voltage, be in UA, UB and UC, between at least one end and UN, to have voltage to exist, corresponding diode D1, D2 and D3 have a meeting conducting at least, optocoupler P1 conducting, the output signal of output terminal OUT is low level, and indicating described electric leakage reclosing isolating switch is "on" position.
While in described three-phase electricity, between arbitrary phase and the neutral line, not having voltage, be that in UA, UB and UC arbitrary end is all and there is no voltage between UN, corresponding diode D1, D2 and not conductings of D3, not P1 conducting of optocoupler, the output signal of output terminal OUT is high level, and indicating described electric leakage reclosing isolating switch is gate-dividing state.
When electric leakage reclosing isolating switch is used in the single phase power supply system, in UA, UB and UC, any end can be as the leading-out terminal of single-phase electricity, for example, the leading-out terminal that UA is single-phase electricity, when between UA and neutral line UN, having voltage to exist, the state of output terminal OUT is low level so, and now indicating opening and closing state is "on" position; When between UA and neutral line UN, there is no voltage, the state of output terminal OUT is high level so, and now indicating opening and closing state is gate-dividing state.Therefore, no matter be in the single phase power supply system, or, in three-phase power supply system, micro-control unit can judge exactly by the state of electric leakage reclosing circuit-breaker switching on-off decision circuitry output terminal OUT the opening and closing state of electric leakage reclosing.
The embodiment of the present invention is carried out detection of electrical leakage when identical to each of three-phase electricity, overcome the unstable error in judgement of bringing of machinery, and the limitation of single-phase power taking sub-switch circuit, improved the accuracy of detection of electrical leakage and the stability of electric-leakage detection circuit.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can realize with the executable program code of computer installation, thereby they can be stored in memory storage and be carried out by calculation element, perhaps they are made into respectively to each integrated circuit modules, or become the single integrated circuit module to realize a plurality of module makings in them.Like this, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (4)
1. an electric leakage reclosing circuit-breaker switching on-off decision circuitry, it is characterized in that, described circuit comprises: rectification circuit and output circuit, described rectification circuit comprises the first diode (D1), the second diode (D2), the 3rd diode (D3), the first resistor (R1) and the first capacitor (C1), and described output circuit comprises optocoupler (P1), power supply (VCC), the second resistor (R2) and the second capacitor (C2); Wherein
The anode of described the first diode (D1), the second diode (D2) and the 3rd diode (D3) connects respectively the phase in three-phase electricity, and negative electrode is connected to the first pole plate of described the first capacitor (C1) and the anode of described optocoupler (P1) by described the first resistor (R1);
The negative electrode of the second pole plate of described the first capacitor (C1) and described optocoupler (P1) is connected to the neutral line;
The collector of described optocoupler (P1) is connected to power supply (VCC) by the second resistor (R2), and the emitter of optocoupler (P1) is connected to power supply ground;
Described the second capacitor (C2) is connected between the collector and emitter of described optocoupler (P1).
2. electric leakage reclosing circuit-breaker switching on-off decision circuitry according to claim 1, it is characterized in that, in described rectification circuit, the first resistor (R1) is current-limiting resistor, for adjusting the curtage of described the first diode (D1), the second diode (D2) and the output of the 3rd diode (D3) negative electrode.
3. electric leakage reclosing circuit-breaker switching on-off decision circuitry according to claim 1, is characterized in that, in described rectification circuit, the first capacitor (C1) is for the AC compounent of filtering AC signal.
4. electric leakage reclosing circuit-breaker switching on-off decision circuitry according to claim 1, it is characterized in that, the collector output divide-shut brake judgement signal of described optocoupler (P1), while in described three-phase electricity, between at least one phase and the neutral line, having voltage, described divide-shut brake judgement signal is low level, and indicating described electric leakage reclosing isolating switch is gate-dividing state, otherwise, described divide-shut brake judgement signal is high level, and indicating described electric leakage reclosing isolating switch is "on" position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201310446905 CN103472354A (en) | 2013-09-26 | 2013-09-26 | Switching-closing judging circuit of electric leakage reclosure breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201310446905 CN103472354A (en) | 2013-09-26 | 2013-09-26 | Switching-closing judging circuit of electric leakage reclosure breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
CN103472354A true CN103472354A (en) | 2013-12-25 |
Family
ID=49797277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201310446905 Pending CN103472354A (en) | 2013-09-26 | 2013-09-26 | Switching-closing judging circuit of electric leakage reclosure breaker |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103472354A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104297675A (en) * | 2014-07-18 | 2015-01-21 | 国家电网公司 | All-state monitoring apparatus for opening and closing of circuit breaker |
CN111751715A (en) * | 2020-05-14 | 2020-10-09 | 广西电网有限责任公司电力科学研究院 | Be applied to primary loop detection device of circuit breaker |
CN112098887A (en) * | 2020-08-17 | 2020-12-18 | 交控科技股份有限公司 | Rail transit dry contact point state judgment system and method |
-
2013
- 2013-09-26 CN CN 201310446905 patent/CN103472354A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104297675A (en) * | 2014-07-18 | 2015-01-21 | 国家电网公司 | All-state monitoring apparatus for opening and closing of circuit breaker |
CN111751715A (en) * | 2020-05-14 | 2020-10-09 | 广西电网有限责任公司电力科学研究院 | Be applied to primary loop detection device of circuit breaker |
CN111751715B (en) * | 2020-05-14 | 2023-04-11 | 广西电网有限责任公司电力科学研究院 | Be applied to primary loop detection device of circuit breaker |
CN112098887A (en) * | 2020-08-17 | 2020-12-18 | 交控科技股份有限公司 | Rail transit dry contact point state judgment system and method |
CN112098887B (en) * | 2020-08-17 | 2024-01-26 | 交控科技股份有限公司 | Rail transit dry contact state judging system and method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN203883692U (en) | Power board and energy release circuit thereof | |
CN104218532A (en) | Voltage protection circuit for frequency converter direct current (DC) bus | |
CN102280862A (en) | Frequency converter input/output reverse connection detection protection method and device | |
CN116094143B (en) | Power voltage detecting system | |
CN204258411U (en) | A kind of intelligent UPS device | |
CN103472354A (en) | Switching-closing judging circuit of electric leakage reclosure breaker | |
CN204882821U (en) | Killer switch state detection circuitry | |
CN203502529U (en) | Switching on/of judging circuit of electric leakage reclosure breaker | |
CN101887082A (en) | Three-phase power input phase-loss detection circuit | |
CN105896563A (en) | Zero-crossing trigger control circuit for anti-parallel thyristor split-phase switched capacitor | |
CN104577968A (en) | Three-phase overvoltage, under-voltage and default phase integrated protection circuit | |
CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
CN204721211U (en) | The power supply circuits of inverter and there are its household electrical appliance | |
CN204089173U (en) | A kind of frequency changer direct current bus voltage protection circuit | |
CN203439864U (en) | Elevator control cabinet | |
CN205039513U (en) | High -power circuit protector against power failure of high efficiency | |
CN201707398U (en) | Three-phase power supply input open-phase detecting circuit | |
CN103401215A (en) | Over-voltage and under-voltage protection circuit, protection socket and terminal | |
CN204089291U (en) | The circuit structure of retention time is extended after a kind of Switching Power Supply power-off | |
CN203944975U (en) | For the open-phase protection circuit of inverter type welder | |
CN209250219U (en) | A kind of under-voltage delay protection device of power supply | |
CN209627047U (en) | Ups power | |
CN112886697A (en) | Injection pump and power supply circuit thereof | |
CN206023261U (en) | A kind of cell voltage protection circuit | |
CN111030287A (en) | UPS uninterrupted power source system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |
|
WD01 | Invention patent application deemed withdrawn after publication |