CN203502529U - Switching on/of judging circuit of electric leakage reclosure breaker - Google Patents
Switching on/of judging circuit of electric leakage reclosure breaker Download PDFInfo
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- CN203502529U CN203502529U CN201320600138.6U CN201320600138U CN203502529U CN 203502529 U CN203502529 U CN 203502529U CN 201320600138 U CN201320600138 U CN 201320600138U CN 203502529 U CN203502529 U CN 203502529U
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- optocoupler
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- electric leakage
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Abstract
The utility model discloses a switching on/of judging circuit of an electric leakage reclosure breaker. The 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 respectively connected with one phase of three-phase power. 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 detection is carried out on three phases of the three-phase power at the same time, and therefore the accuracy of electric leakage detection and the stability of an electric leakage detecting circuit are improved.
Description
Technical field
The utility model relates to residual current circuit breaker technical field, relates 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 there is error during machinery, divide-shut brake judgement is inaccurate; Rear a kind of decision circuitry has certain limitation, and when isolating switch is used in single phase power supply system, and power taking judgement is not when used mutually, just cannot judge opening and closing state.
Utility model content
In view of this, the unstable error in judgement of bringing that the utility model embodiment 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 utility model 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 there is voltage between at least one phase and the neutral line in described three-phase electricity, 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 utility model embodiment carries 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.
Accompanying drawing explanation
To the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present utility model by describe exemplary embodiment of the present utility model in detail with reference to accompanying drawing below, in accompanying drawing:
Fig. 1 is the schematic diagram of the electric leakage reclosing controller that is suitable for of the utility model embodiment;
Fig. 2 is the schematic diagram of the electric leakage reclosing circuit-breaker switching on-off decision circuitry of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, in accompanying drawing, only show the part relevant to the utility model but not full content.
The circuit that the utility model provides 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 utility model embodiment provides can be used for leaking electricity in reclosing controller conventionally, as shown in Figure 1, described electric leakage reclosing controller comprises micro-control unit, voltage sample unit, current sampling unit, spontaneous electric power supply unit, divide-shut brake judging unit, keystroke handling unit, display processing unit and protection output unit, the circuit that the utility model embodiment provides is the divide-shut brake decision circuitry of 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 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 utility model embodiment.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 by the first resistor R1, be connected to the anode of optocoupler P1 in the first pole plate of the first capacitor C1 and output circuit, in described rectification circuit, in the second pole plate of the first capacitor C1 and output circuit, the negative electrode of optocoupler P1 is all 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, also can be 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 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 simultaneously, has increased the stability of circuit.
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 utility model is as follows:
While there is voltage between at least one phase and the neutral line in described three-phase electricity, be in UA, UB and UC, at least between 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 there is not voltage between arbitrary phase and the neutral line in described three-phase electricity, be that in UA, UB and UC arbitrary end is all and between UN, there is no voltage, 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 single phase power supply system, in UA, UB and UC, any one end can be as the leading-out terminal of single-phase electricity, for example, UA is the leading-out terminal of single-phase electricity, when having voltage to exist between UA and neutral line UN, the state of output terminal OUT is low level so, and now indicating opening and closing state is "on" position; When there is no voltage between UA and neutral line UN, 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 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 utility model embodiment carries 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 utility model can realize with general calculation element, they can concentrate on single calculation element, or 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, or they are made into respectively to each integrated circuit modules, or become single integrated circuit module to realize a plurality of module makings in them.Like this, the utility model is not restricted to the combination of any specific hardware and software.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, to those skilled in the art, the utility model can have various changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model 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 there is voltage between at least one phase and the neutral line in described three-phase electricity, 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 |
|---|---|---|---|
| CN201320600138.6U CN203502529U (en) | 2013-09-26 | 2013-09-26 | Switching on/of judging circuit of electric leakage reclosure breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320600138.6U CN203502529U (en) | 2013-09-26 | 2013-09-26 | Switching on/of judging circuit of electric leakage reclosure breaker |
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| Publication Number | Publication Date |
|---|---|
| CN203502529U true CN203502529U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320600138.6U Expired - Fee Related CN203502529U (en) | 2013-09-26 | 2013-09-26 | Switching on/of judging circuit of electric leakage reclosure breaker |
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| CN (1) | CN203502529U (en) |
Cited By (2)
| 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 |
| CN106785941A (en) * | 2017-03-20 | 2017-05-31 | 浙江工贸职业技术学院 | A kind of breaker of regulator cubicle installs row |
-
2013
- 2013-09-26 CN CN201320600138.6U patent/CN203502529U/en not_active Expired - Fee Related
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 |
| CN106785941A (en) * | 2017-03-20 | 2017-05-31 | 浙江工贸职业技术学院 | A kind of breaker of regulator cubicle installs row |
| CN106785941B (en) * | 2017-03-20 | 2018-10-12 | 浙江工贸职业技术学院 | A kind of breaker installation row of electrical cabinet |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20210926 |