CN103500983A - Circuit of miniature electric leakage circuit breaker - Google Patents
Circuit of miniature electric leakage circuit breaker Download PDFInfo
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- CN103500983A CN103500983A CN201310454539.XA CN201310454539A CN103500983A CN 103500983 A CN103500983 A CN 103500983A CN 201310454539 A CN201310454539 A CN 201310454539A CN 103500983 A CN103500983 A CN 103500983A
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Abstract
The invention relates to a circuit of a miniature electric leakage circuit breaker. The circuit of the miniature electric leakage circuit breaker comprises a power supply circuit, and is characterized by also comprising an electric leakage signal conditioning circuit, an electric leakage detection control unit, an electric leakage detection control unit required circuit, an electric leakage testing circuit and a tripping circuit, wherein the power supply circuit is connected with the electric leakage testing circuit, the electric leakage detection control unit and the tripping circuit; the electric leakage signal conditioning circuit is connected with the electric leakage detection control unit; the electric leakage detection control unit required circuit is connected with the electric leakage detection control unit. According to the circuit of the miniature electric leakage circuit breaker provided by the invention, the withstand voltage value of the tripping circuit is increased, the lightning surge resistance is improved, and moreover, the cost performance is high; the working temperature rise of the power supply circuit is reduced, the product reliability is improved, the pulse packet resistance of a product is improved, and the false tripping phenomenon of the product is reduced. The circuit of the miniature electric leakage circuit breaker is simple in design, strong in EMC (electromagnetic compatibility) resistance, high in reliability and low in cost, and more meets the actual demand of the miniature electric leakage circuit breaker.
Description
Technical field
The present invention relates to the breaker circuit field, more particularly, relate to a kind of Minitype electrical leakage breaker circuit.
Background technology
The power circuit of Minitype electrical leakage breaker generally adopts the form of resistance step-down at present, due to standard GB16917.1 regulation, its operating voltage range is minimum in 50V, the highest restriction in 440V and small product size, cause adopting dropping resistor high-power, large resistance, so that dropping resistor temperature rise ratio when normal operation is higher, thereby reduce the reliability of whole circuit working, due to the voltage stabilizing circuit that only adopts detection of electrical leakage control unit inside, the ability that causes the anti-impulse train of product to disturb easily produces the false tripping phenomenon simultaneously; Also have trip circuit generally to adopt single silicon controlled form, after breaker electrifying, alternating voltage is applied directly between silicon controlled anode and negative electrode through rectification, now the direct voltage at controllable silicon two ends surpasses 400V, and more than its reverse withstand voltage at least is selected in 1000V, very high to single silicon controlled parameter request like this, the quality of product directly depends on the individual parameter of silicon controlled, reliability, fail safe and the anti-lightning surge of product are reduced, and cost compare is high simultaneously is unfavorable for batch production.
Summary of the invention
The technical problem to be solved in the present invention is, for the false tripping phenomenon of prior art frequently occur, circuit reliability is poor, fail safe and the low defect of anti-lightning surge, and a kind of Minitype electrical leakage breaker circuit is provided, at least comprise: power circuit; The electric leakage signal modulate circuit; The detection of electrical leakage control unit; The required circuit of detection of electrical leakage control unit; The leak(age) test circuit; Trip circuit.
Wherein, described power circuit is connected with leak(age) test circuit, detection of electrical leakage control unit, trip circuit; The electric leakage signal modulate circuit is connected with the detection of electrical leakage control unit; The required circuit of detection of electrical leakage control unit is connected with the detection of electrical leakage control unit.
In Minitype electrical leakage breaker circuit of the present invention, described power circuit further is comprised of surge restraint circuit, full-wave rectifying circuit, capacitance-resistance voltage reduction circuit, filter circuit.
In Minitype electrical leakage breaker circuit of the present invention, described electric leakage signal modulate circuit is by resistance R 4, R5, R6, and capacitor C 3, C4, C5, C6 and diode D6 form.
In Minitype electrical leakage breaker circuit of the present invention, described detection of electrical leakage control unit is comprised of detection of electrical leakage integrated circuit VG54123.
In Minitype electrical leakage breaker circuit of the present invention, the required circuit of described detection of electrical leakage control unit is comprised of capacitor C 7, C8.
In Minitype electrical leakage breaker circuit of the present invention, described leak(age) test circuit is comprised of resistance R 1.
In Minitype electrical leakage breaker circuit of the present invention, described trip circuit is by diode D7, D3, release Trip, and resistance R 3, R7, R8, R9, capacitor C 9 and double silicon control series circuit D8, D9 form.
In Minitype electrical leakage breaker circuit of the present invention, described surge restraint circuit further consists of piezo-resistance MYRl; Described full-wave rectifying circuit further consists of diode D1, D2, D3, D4; Described capacitance-resistance voltage reduction circuit further consists of resistance R 2, capacitor C 1; Auxiliary voltage stabilizing circuit and capacitor C 2 that described filter circuit further consists of voltage stabilizing didoe D5 form.
Implement Minitype electrical leakage breaker circuit of the present invention, have following beneficial effect: adopt the form of double silicon control series connection, not only make the trip circuit withstand voltage double, the anti-lightning surge capacity improves greatly, and cost performance is very high; Power circuit employing group is held the step-down form, reduces the work temperature rise of power circuit, greatly improves the reliability of product, and the ability that simultaneously adopts auxiliary voltage stabilizing circuit greatly to improve the anti-impulse train of product reduces the false tripping phenomenon of product; Simultaneously simple, the anti-EMC performance of circuit design is strong, reliability is high and cost at the bottom of, more meet the actual demand of Minitype electrical leakage breaker.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the Minitype electrical leakage breaker circuit diagram of available technology adopting resistance step-down;
Fig. 2 is the Minitype electrical leakage breaker circuit diagram of the single silicon controlled form of available technology adopting;
Fig. 3 is the theory diagram of Minitype electrical leakage breaker circuit of the present invention;
Fig. 4 is the circuit diagram of Minitype electrical leakage breaker circuit of the present invention.
Embodiment
Refer to Fig. 1, Fig. 1 is the Minitype electrical leakage breaker circuit diagram of available technology adopting resistance step-down, adopts the form of resistance step-down.Its defect is that operating voltage range is minimum in 50V, the highest restriction in 440V and small product size, cause adopting dropping resistor high-power, large resistance, so that dropping resistor temperature rise ratio when normal operation is higher, thereby reduce the reliability of whole circuit working, due to the voltage stabilizing circuit that only adopts detection of electrical leakage control unit inside, the ability that causes the anti-impulse train of product to disturb easily produces the false tripping phenomenon simultaneously.
Refer to Fig. 2, Fig. 2 is the Minitype electrical leakage breaker circuit diagram of the single silicon controlled form of available technology adopting.Its defect is: after breaker electrifying, alternating voltage is applied directly between silicon controlled anode and negative electrode through rectification, now the direct voltage at controllable silicon two ends surpasses 400V, and more than its reverse withstand voltage at least is selected in 1000V, very high to single silicon controlled parameter request like this, the quality of product directly depends on the individual parameter of silicon controlled.
As shown in Figure 3, Fig. 3 is the theory diagram of Minitype electrical leakage breaker circuit of the present invention.A kind of Minitype electrical leakage breaker circuit, at least comprise: power circuit; The electric leakage signal modulate circuit; The detection of electrical leakage control unit; The required circuit of detection of electrical leakage control unit; The leak(age) test circuit; Trip circuit; Wherein, described power circuit is connected with leak(age) test circuit, detection of electrical leakage control unit, trip circuit; The electric leakage signal modulate circuit is connected with the detection of electrical leakage control unit; The required circuit of detection of electrical leakage control unit is connected with the detection of electrical leakage control unit.
Preferably, described power circuit further is comprised of surge restraint circuit, full-wave rectifying circuit, capacitance-resistance voltage reduction circuit, filter circuit.
Preferably, described electric leakage signal modulate circuit is by resistance R 4, R5, R6, and capacitor C 3, C4, C5, C6 and diode D6 form.
Preferably, described detection of electrical leakage control unit is comprised of detection of electrical leakage integrated circuit VG54123.
Preferably, the required circuit of described detection of electrical leakage control unit is comprised of capacitor C 7, C8.
Preferably, described leak(age) test circuit is comprised of resistance R 1.
Preferably, described trip circuit is by diode D7, D3, release Trip, and resistance R 3, R7, R8, R9, capacitor C 9 and double silicon control series circuit D8, D9 form.
Preferably, described surge restraint circuit further consists of piezo-resistance MYRl; Described full-wave rectifying circuit further consists of diode D1, D2, D3, D4; Described capacitance-resistance voltage reduction circuit further consists of resistance R 2, capacitor C 1; Auxiliary voltage stabilizing circuit and capacitor C 2 that described filter circuit further consists of voltage stabilizing didoe D5 form.
As shown in Figure 4, Fig. 4 is the circuit diagram of Minitype electrical leakage breaker circuit of the present invention.
The present invention, by the design of above theory diagram, has beneficial effect: one, adopt the form of double silicon control series connection, not only make the trip circuit withstand voltage double, the anti-lightning surge capacity improves greatly, and cost performance is very high; Two, power circuit adopts the resistance-capacitance depressurization form, reduces the work temperature rise of power circuit, greatly improves the reliability of product, and the ability that simultaneously adopts auxiliary voltage stabilizing circuit greatly to improve the anti-impulse train of product reduces the false tripping phenomenon of product; Three, simultaneously simple, the anti-EMC performance of circuit design is strong, reliability is high and cost at the bottom of, more meet the actual demand of Minitype electrical leakage breaker.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the scope of the invention, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion of the technology of the present invention, can carry out many modifications and not break away from its protection range the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises all embodiment that drop into the claim protection range.
Claims (8)
1. a Minitype electrical leakage breaker circuit comprises: power circuit, it is characterized in that, and described Minitype electrical leakage breaker circuit also comprises:
The electric leakage signal modulate circuit;
The detection of electrical leakage control unit;
The required circuit of detection of electrical leakage control unit;
The leak(age) test circuit;
Trip circuit;
Wherein, described power circuit is connected with leak(age) test circuit, detection of electrical leakage control unit, trip circuit; The electric leakage signal modulate circuit is connected with the detection of electrical leakage control unit; The required circuit of detection of electrical leakage control unit is connected with the detection of electrical leakage control unit.
2. Minitype electrical leakage breaker circuit according to claim 1, is characterized in that, described power circuit further is comprised of surge restraint circuit, full-wave rectifying circuit, capacitance-resistance voltage reduction circuit, filter circuit.
3. Minitype electrical leakage breaker circuit according to claim 1, is characterized in that, described electric leakage signal modulate circuit is by resistance R 4, R5, R6, and capacitor C 3, C4, C5, C6 and diode D6 form.
4. Minitype electrical leakage breaker circuit according to claim 1, is characterized in that, described detection of electrical leakage control unit is comprised of detection of electrical leakage integrated circuit VG54123.
5. Minitype electrical leakage breaker circuit according to claim 1, is characterized in that, the required circuit of described detection of electrical leakage control unit is comprised of capacitor C 7, C8.
6. Minitype electrical leakage breaker circuit according to claim 1, is characterized in that, described leak(age) test circuit is comprised of resistance R 1.
7. Minitype electrical leakage breaker circuit according to claim 1, is characterized in that, described trip circuit is by diode D7, D3, release Trip, and resistance R 3, R7, R8, R9, capacitor C 9 and double silicon control series circuit D8, D9 form.
8. Minitype electrical leakage breaker circuit according to claim 2, is characterized in that, described surge restraint circuit further consists of piezo-resistance MYRl; Described full-wave rectifying circuit further consists of diode D1, D2, D3, D4; Described capacitance-resistance voltage reduction circuit further consists of resistance R 2, capacitor C 1; Auxiliary voltage stabilizing circuit and capacitor C 2 that described filter circuit further consists of voltage stabilizing didoe D5 form.
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103500984A (en) * | 2013-10-08 | 2014-01-08 | 长城电器集团有限公司 | Circuit of miniature residual current circuit breaker |
CN104269820A (en) * | 2014-10-22 | 2015-01-07 | 长城电器集团有限公司 | Small residual current breaker circuit with prepayment function |
CN104578002A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Minitype residual current circuit breaker protective circuit |
CN104578003A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Small residual current circuit breaker circuit having overvoltage protection function |
CN104577972A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Minitype residual current protective circuit |
CN105186447A (en) * | 2015-08-20 | 2015-12-23 | 浙江凯发电气股份有限公司 | Automatic recovery electric leakage controller circuit |
CN106711982A (en) * | 2016-12-19 | 2017-05-24 | 无锡万吉科技股份有限公司 | Electric leakage protection switch capable of resisting ultrahigh surge voltage |
Citations (5)
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US5920451A (en) * | 1997-09-05 | 1999-07-06 | Carlingswitch, Inc. | Earth leakage circuit breaker assembly |
CN201327992Y (en) * | 2007-12-19 | 2009-10-14 | 刘雪娟 | Residual current operated circuit breaker with high sensitivity |
CN101740271A (en) * | 2008-11-15 | 2010-06-16 | 上海益而益电器制造有限公司 | Leakage circuit breaker |
CN202940564U (en) * | 2012-11-05 | 2013-05-15 | 厦门盈瑞丰电子科技有限公司 | Three-phase leakage circuit breaker |
CN203504145U (en) * | 2013-09-30 | 2014-03-26 | 长城电器集团有限公司 | Small electric-leakage breaker circuit |
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2013
- 2013-09-30 CN CN201310454539.XA patent/CN103500983A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US5920451A (en) * | 1997-09-05 | 1999-07-06 | Carlingswitch, Inc. | Earth leakage circuit breaker assembly |
CN201327992Y (en) * | 2007-12-19 | 2009-10-14 | 刘雪娟 | Residual current operated circuit breaker with high sensitivity |
CN101740271A (en) * | 2008-11-15 | 2010-06-16 | 上海益而益电器制造有限公司 | Leakage circuit breaker |
CN202940564U (en) * | 2012-11-05 | 2013-05-15 | 厦门盈瑞丰电子科技有限公司 | Three-phase leakage circuit breaker |
CN203504145U (en) * | 2013-09-30 | 2014-03-26 | 长城电器集团有限公司 | Small electric-leakage breaker circuit |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103500984A (en) * | 2013-10-08 | 2014-01-08 | 长城电器集团有限公司 | Circuit of miniature residual current circuit breaker |
CN103500984B (en) * | 2013-10-08 | 2016-09-07 | 长城电器集团有限公司 | Circuit of miniature residual current circuit breaker |
CN104269820A (en) * | 2014-10-22 | 2015-01-07 | 长城电器集团有限公司 | Small residual current breaker circuit with prepayment function |
CN104578002A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Minitype residual current circuit breaker protective circuit |
CN104578003A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Small residual current circuit breaker circuit having overvoltage protection function |
CN104577972A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Minitype residual current protective circuit |
CN105186447A (en) * | 2015-08-20 | 2015-12-23 | 浙江凯发电气股份有限公司 | Automatic recovery electric leakage controller circuit |
CN106711982A (en) * | 2016-12-19 | 2017-05-24 | 无锡万吉科技股份有限公司 | Electric leakage protection switch capable of resisting ultrahigh surge voltage |
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