CN105098699A - Mechanical-electronic hybrid circuit breaker - Google Patents
Mechanical-electronic hybrid circuit breaker Download PDFInfo
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- CN105098699A CN105098699A CN201510412101.4A CN201510412101A CN105098699A CN 105098699 A CN105098699 A CN 105098699A CN 201510412101 A CN201510412101 A CN 201510412101A CN 105098699 A CN105098699 A CN 105098699A
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- resistance
- circuit breaker
- rectifier bridge
- controllable silicon
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Abstract
The invention discloses a mechanical-electronic hybrid circuit breaker, comprising a mutual inductor T, a rectifier bridge D1, a resistor R1, a resistor R2, an adjustable resistor RP, a resistor R3, a diode D2, a triode V1, a silicon controlled rectifier VT, a coil J, a capacitor C1, a resistor R4, a capacitor C2, a voltage-regulator tube VD2, a switch K and a load L. The sampling of a current signal and the output control of a switch movement in the invention are achieved via an electronic device, so the mechanical-electronic hybrid circuit breaker not only overcomes the shortcomings existed in the prior art, but also has the advantages of high sensitivity, fast reaction speed and excellent stability of an electronic type circuit breaker, and making and breaking large current of a mechanical type circuit breaker, and is an ideal substitute product of the current circuit breaker. The mechanical-electronic hybrid circuit breaker of the invention is stable in performance, and free of temperature rise, and will not be influenced by environment temperature to generate false operation, and not generate a large electric arc, thereby improving service life of the circuit breaker. The circuit component of the invention is simple, high in sensitivity, low in cost, small in volume, microminiaturized and easy to manufacture.
Description
Technical field
The present invention relates to overcurrent protection, short-circuit protection miniature circuit breaker field, specifically a kind of electro-mechanical mixed circuit breaker.
Background technology
In prior art, circuit breaker is respond to by bimetallic element the realization that arrives by the thermogenetic heat energy of element by electric current from the action of disjunction of threading off, and under the effect of heat energy, circuit breaker produces disjunction.Ambient temperature when the external world raises, and thermal energy transfer is to circuit breaker internal, and two gold rises genus element can produce directed displacement too, causes the operating characteristics of circuit breaker unstable.The disjunction of easy generation influenced by ambient temperature is misoperation, cannot overcome.Meanwhile, conventional circuit breaker is due to its actuating mechanism complexity, and breaking speed is slow, particularly more obvious during short circuit.Moving contact and fixed contact instantaneously can produce electric arc what be separated, electric arc is between moving contact and fixed contact, heat in electric arc spreads towards periphery, load is heavier, loop current is larger, the electric arc produced is larger, in electric arc, diffusion area is larger towards periphery for heat, while the outside diffusion area of electric arc, also heat is directly transferred on the functional part of periphery, to the heat of functional part additional spare being distributed in dynamic and static contact periphery, this heat damage functional part, also can make shorten the useful life of circuit breaker.
Summary of the invention
The object of this invention is to provide a kind of electro-mechanical mixed circuit breaker, to solve in prior art circuit breaker due to the bimetallic element of serviceability temperature characteristic sensitivity, be subject to ambient temperature environmental change and produce misoperation, its actuating mechanism is complicated, breaking speed is slow, particularly more obvious during short circuit, cause the technical problem producing electrical discharge arc between dynamic/static contact.
Technical scheme of the present invention is as follows:
A kind of electro-mechanical mixed circuit breaker, include instrument transformer T and rectifier bridge D1, resistance R1, resistance R2, adjustable resistance RP and resistance R3, diode D2, triode V1, controllable silicon VT, coil J and electric capacity C1, resistance R4, electric capacity C2 and voltage-stabiliser tube VD2, and K switch, load L, it is characterized in that: external AC power supply after two terminals on the described former limit of instrument transformer T are connected with load L with described K switch respectively, two ac output ends of described rectifier bridge D1 are connected with two terminals on the described former limit of instrument transformer T respectively;
Described resistance R1 and resistance R2, after described adjustable resistance RP and resistance R3 is in series respectively and is in parallel, is connected with two DC output ends of described rectifier bridge D1 respectively;
Between the resistance R1 described in anode access of described diode D2 and resistance R2, the negative electrode of diode D2 is connected with the emitter of described triode V1 respectively with the control end of described controllable silicon VT, between the adjustable resistance RP described in base stage access of described triode V1 and resistance R3, be in parallel with the collector electrode of triode V1 after the anode of described controllable silicon VT and described coil J are in series, be connected with a DC output end of described rectifier bridge D1 after being in series with described resistance R4 again, the negative electrode of described controllable silicon VT is connected with another DC output end of described rectifier bridge D1, described electric capacity C1 is connected between the base stage of described triode V1 and the negative electrode of described controllable silicon VT,
After described electric capacity C2 and voltage-stabiliser tube VD2 is in parallel, be connected with a DC output end of described rectifier bridge D1 after being in series with described resistance R4 on the one hand, be connected with another DC output end of described rectifier bridge D1 on the other hand; The negative electrode of described controllable silicon VT and the anode of voltage-stabiliser tube VD2 access load L and between the terminals on the former limit of instrument transformer T be connected with load L respectively.
Described electro-mechanical mixed circuit breaker, is characterized in that: described instrument transformer T and rectifier bridge D1 forms authigenic power supply and sample circuit.
Described electro-mechanical mixed circuit breaker, is characterized in that: described resistance R1, resistance R2, adjustable resistance RP and resistance R3 form current detection circuit.
Described electro-mechanical mixed circuit breaker, is characterized in that: described diode D2, triode V1, controllable silicon VT, coil J and electric capacity C1 component characteristic initialization circuit.
Described electro-mechanical mixed circuit breaker, is characterized in that: described resistance R4, electric capacity C2 and voltage-stabiliser tube VD2 form voltage stabilizing circuit.
Beneficial effect of the present invention:
The present invention is made up of electronic devices and components, control to realize by electronic device to the sampling of current signal and the output of switch motion, both overcome electronic breaker and be difficult to break-make big current and the negative effect and the insoluble unsteadiness of mechanical type circuit breaker that produce temperature effect, the shortcoming that sensitivity is low, highly sensitive, the reaction speed again with electronic breaker is fast, the advantage of good stability and mechanical type circuit breaker energy break-make big current, is the desirable substitute products of current circuit breaker; Stable performance of the present invention, without temperature rise, can not be subject to the impact of ambient temperature and misoperation, also can not produce large electric arc, extend the useful life of circuit breaker; Circuit element of the present invention is simple, and highly sensitive, cost is low, and volume is little, microminiaturized, easy to manufacture.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
See Fig. 1, a kind of electro-mechanical mixed circuit breaker, include instrument transformer T and rectifier bridge D1, resistance R1, resistance R2, adjustable resistance RP and resistance R3, diode D2, triode V1, controllable silicon VT, coil J and electric capacity C1, resistance R4, electric capacity C2 and voltage-stabiliser tube VD2, and K switch, load L, it is characterized in that: external AC power supply after two terminals on the described former limit of instrument transformer T are connected with load L with described K switch respectively, two ac output ends of described rectifier bridge D1 are connected with two terminals on the described former limit of instrument transformer T respectively;
Described resistance R1 and resistance R2, after described adjustable resistance RP and resistance R3 is in series respectively and is in parallel, is connected with two DC output ends of described rectifier bridge D1 respectively;
Between the resistance R1 described in anode access of described diode D2 and resistance R2, the negative electrode of diode D2 is connected with the emitter of described triode V1 respectively with the control end of described controllable silicon VT, between the adjustable resistance RP described in base stage access of described triode V1 and resistance R3, be in parallel with the collector electrode of triode V1 after the anode of described controllable silicon VT and described coil J are in series, be connected with a DC output end of described rectifier bridge D1 after being in series with described resistance R4 again, the negative electrode of described controllable silicon VT is connected with another DC output end of described rectifier bridge D1, described electric capacity C1 is connected between the base stage of described triode V1 and the negative electrode of described controllable silicon VT,
After described electric capacity C2 and voltage-stabiliser tube VD2 is in parallel, be connected with a DC output end of described rectifier bridge D1 after being in series with described resistance R4 on the one hand, be connected with another DC output end of described rectifier bridge D1 on the other hand; The negative electrode of controllable silicon VT and the anode of voltage-stabiliser tube VD2 access load L and between the terminals on the former limit of instrument transformer T be connected with load L respectively.
In the present invention, instrument transformer T and rectifier bridge D1 forms authigenic power supply and sample circuit; Resistance R1, resistance R2, adjustable resistance RP and resistance R3 form current detection circuit; Diode D2, triode V1, controllable silicon VT, coil J and electric capacity C1 component characteristic initialization circuit; Resistance R4, electric capacity C2 and voltage-stabiliser tube VD2 form voltage stabilizing circuit.
Below in conjunction with accompanying drawing, the present invention is further illustrated:
After K switch is closed, electric current flows to load L through the former limit of instrument transformer T, and meanwhile, the electric current of the secondary induction of instrument transformer T is as authigenic power supply and sample rate current, be DC power supply through rectifier bridge D1 rectifying conversion, be respectively current detection circuit, characteristic setting circuit and voltage stabilizing circuit and working power is provided.
When load L overcurrent being detected, export inverse time-lag operating characteristics signal by adjustable resistance RP, resistance R3, electric capacity C1 built-up circuit, amplify to control element controllable silicon VT, controllable silicon VT conducting through triode V1, coil J obtains electric pull switch K and disconnects; When load L short circuit being detected, exported without the direct output action characteristic signals of time delay by resistance R1, resistance R2, diode D2 built-up circuit, to control element controllable silicon VT, controllable silicon VT conducting, coil J obtains electric pull switch K and disconnects.
Claims (5)
1. an electro-mechanical mixed circuit breaker, include instrument transformer T and rectifier bridge D1, resistance R1, resistance R2, adjustable resistance RP and resistance R3, diode D2, triode V1, controllable silicon VT, coil J and electric capacity C1, resistance R4, electric capacity C2 and voltage-stabiliser tube VD2, and K switch, load L, it is characterized in that: external AC power supply after two terminals on the described former limit of instrument transformer T are connected with load L with described K switch respectively, two ac output ends of described rectifier bridge D1 are connected with two terminals on the described former limit of instrument transformer T respectively;
Described resistance R1 and resistance R2, after described adjustable resistance RP and resistance R3 is in series respectively and is in parallel, is connected with two DC output ends of described rectifier bridge D1 respectively;
Between the resistance R1 described in anode access of described diode D2 and resistance R2, the negative electrode of diode D2 is connected with the emitter of described triode V1 respectively with the control end of described controllable silicon VT, between the adjustable resistance RP described in base stage access of described triode V1 and resistance R3, be in parallel with the collector electrode of triode V1 after the anode of described controllable silicon VT and described coil J are in series, be connected with a DC output end of described rectifier bridge D1 after being in series with described resistance R4 again, the negative electrode of described controllable silicon VT is connected with another DC output end of described rectifier bridge D1, described electric capacity C1 is connected between the base stage of described triode V1 and the negative electrode of described controllable silicon VT,
After described electric capacity C2 and voltage-stabiliser tube VD2 is in parallel, be connected with a DC output end of described rectifier bridge D1 after being in series with described resistance R4 on the one hand, be connected with another DC output end of described rectifier bridge D1 on the other hand; The negative electrode of described controllable silicon VT and the anode of voltage-stabiliser tube VD2 access load L and between the terminals on the former limit of instrument transformer T be connected with load L respectively.
2. electro-mechanical mixed circuit breaker according to claim 1, is characterized in that: described instrument transformer T and rectifier bridge D1 forms authigenic power supply and sample circuit.
3. electro-mechanical mixed circuit breaker according to claim 1, is characterized in that: described resistance R1, resistance R2, adjustable resistance RP and resistance R3 form current detection circuit.
4. electro-mechanical mixed circuit breaker according to claim 1, is characterized in that: described diode D2, triode V1, controllable silicon VT, coil J and electric capacity C1 component characteristic initialization circuit.
5. electro-mechanical mixed circuit breaker according to claim 1, is characterized in that: described resistance R4, electric capacity C2 and voltage-stabiliser tube VD2 form voltage stabilizing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412101.4A CN105098699A (en) | 2015-07-11 | 2015-07-11 | Mechanical-electronic hybrid circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412101.4A CN105098699A (en) | 2015-07-11 | 2015-07-11 | Mechanical-electronic hybrid circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN105098699A true CN105098699A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510412101.4A Pending CN105098699A (en) | 2015-07-11 | 2015-07-11 | Mechanical-electronic hybrid circuit breaker |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432713Y (en) * | 2000-05-01 | 2001-05-30 | 齐宇庆 | Non-fuse safety device |
| CN102377163A (en) * | 2011-09-16 | 2012-03-14 | 上海诺雅克电气有限公司 | Electronic tripping device with function of monitoring tripping power source |
| CN103236679A (en) * | 2013-05-16 | 2013-08-07 | 天津市百利电气有限公司 | Electronic type backup protection device for AC (alternating current) circuit breaker |
-
2015
- 2015-07-11 CN CN201510412101.4A patent/CN105098699A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432713Y (en) * | 2000-05-01 | 2001-05-30 | 齐宇庆 | Non-fuse safety device |
| CN102377163A (en) * | 2011-09-16 | 2012-03-14 | 上海诺雅克电气有限公司 | Electronic tripping device with function of monitoring tripping power source |
| CN103236679A (en) * | 2013-05-16 | 2013-08-07 | 天津市百利电气有限公司 | Electronic type backup protection device for AC (alternating current) circuit breaker |
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Application publication date: 20151125 |