CN1734876A - Earth fault breaker - Google Patents
Earth fault breaker Download PDFInfo
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- CN1734876A CN1734876A CN 200510027885 CN200510027885A CN1734876A CN 1734876 A CN1734876 A CN 1734876A CN 200510027885 CN200510027885 CN 200510027885 CN 200510027885 A CN200510027885 A CN 200510027885A CN 1734876 A CN1734876 A CN 1734876A
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Abstract
The ground fault detector comprises input circuit, detection amplifying circuit for electric leakage fault, detection amplifying circuit for ground neutral fault, signal control circuit, fault index circuit, and output circuit; wherein, the power signal reaches the said control circuit through input and rectifying circuits, two said detection amplifying circuits generate detection signal and output to said control circuit; the control circuit processes data and outputs to fault index circuit and output circuit.
Description
Technical field
The present invention relates to a kind of ground-fault interrupter (GFCI), especially relate to the GFCI that adopts electromagnetic release.
Background technology
At present, owing to ground-fault interrupter can prevent person electric shock to a certain extent and effectively prevent equipment and the fire incident that earth fault causes, thereby be subjected to extensive use.
Existing ground-fault interrupter comprises that input circuit, leak current fault detect amplifying circuit, the ground connection neutral fault detects amplifying circuit, signal control circuit, output circuit.Power supply signal arrives signal control circuit by input circuit behind rectification circuit A, leak current fault detects amplifying circuit generation detection of electrical leakage signal and inputs to signal control circuit, the ground connection neutral fault detects amplifying circuit and produces the Earth Fault Detection signal and export to signal control circuit, and signal control circuit is exported to output circuit respectively after to signal processing.
Rectification circuit A is made up of 4 rectifier diode D1, D2, D3, D4, and alternating current is transformed into direct current.D1, D2 junction, D3, D4 junction constitute ac input end and are connected with the power end of GFCI, and D2, D3 junction are the DC power supply load end, and narration claims " negative electrode of rectification circuit " afterwards herein, and D1, D4 junction are " anode of rectification circuit ".Rectification circuit B in like manner.
During operate as normal, output of the socket of circuit breaker and wiring output all have electricity output, and circuit breaker is in reset mode.
The magnetic test coil that leak current fault detects amplifying circuit and ground connection neutral fault detection amplifying circuit is used to detect electric leakage signal and earth fault signal, when having detected electric leakage or earth fault, delivering to signal control circuit handles, integrated circuit (IC) in the signal control circuit checks whether this signal has injury or damage to people or equipment
If have then produce a triggering signal fast, trigger unidirectional controllable silicon S CR work, cause triode Q1 to end, also along with quitting work, circuit breaker elasticity moving contact K disconnects actuating coil J, the output of circuit breaker output no current, circuit breaker is in trip status.
When the input supply terminal access power supply of circuit breaker, when load end does not have electricity output, often can't judge that the power failure of input still is that circuit breaker itself has fault; Existing GFCI socket not only can connect load by the jack of top cover of faceplate, can also connect load by the load wiring screw, under no indication state, the electric shock situation takes place easily, has brought very big hidden danger to personal safety.
Summary of the invention
The purpose of this invention is to provide a kind of ground-fault interrupter that adopts the electromagnetic type dropout and have indicating circuit.
For this reason, ground-fault interrupter provided by the invention comprises input circuit, leak current fault detects amplifying circuit, the ground connection neutral fault detects amplifying circuit, signal control circuit, failure indicating circuit, output circuit, power supply signal arrives signal control circuit by input circuit behind rectification circuit A, leak current fault detects amplifying circuit generation detection of electrical leakage signal and inputs to signal control circuit, the ground connection neutral fault detects amplifying circuit and produces the Earth Fault Detection signal and export to signal control circuit, and signal control circuit is exported to failure indicating circuit and output circuit respectively after to signal processing.
Failure indicating circuit comprises rectification circuit B, the anode of rectification circuit B links to each other with resistance R 16 1 ends, resistance R 16 other ends connect the anode of diode D11, the negative electrode of diode D11 links to each other with the anode of light-emitting diode D12, the cathode terminal of light-emitting diode D12 connects the collector electrode that a resistance R 9 arrives NPN triode Q2 afterwards, the emitter terminal of NPN triode Q2 links to each other with the negative electrode of rectification circuit B, and NPN triode Q2 is furnished with biasing circuit, thereby forms electric loop.
In order better to reflect the operating state of circuit breaker, can also between the anode of rectification circuit B of the present invention and negative electrode, connect the charged indicating circuit of wiring output and the indicating circuit that resets.
Because above-mentioned fault earthing circuit breaker has possessed deixis, and faulty indication has been brought very big convenience, and can prevent effectively that the person from getting an electric shock, and has characteristics safer, convenient, more perfect function.
Below in conjunction with drawings and Examples technology contents of the present invention is described further.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is the electrical schematic diagram of first kind of embodiment of the present invention.
Fig. 3 is the electrical schematic diagram of second kind of embodiment of the present invention.
Fig. 4 is the electrical schematic diagram of the third embodiment of the present invention.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, ground-fault interrupter provided by the invention comprises input circuit, leak current fault detects amplifying circuit, the ground connection neutral fault detects amplifying circuit, signal control circuit, failure indicating circuit, output circuit, power supply signal arrives signal control circuit by input circuit behind rectification circuit A, leak current fault detects amplifying circuit generation detection of electrical leakage signal and inputs to signal control circuit, the ground connection neutral fault detects amplifying circuit and produces the Earth Fault Detection signal and export to signal control circuit, and signal control circuit is exported to failure indicating circuit and output circuit respectively after to signal processing.
Comprise rectification circuit B as Fig. 2, Fig. 3, failure indicating circuit shown in Figure 4, the anode of rectification circuit B links to each other with resistance R 16 1 ends, resistance R 16 other ends connect the anode of diode D11, the negative electrode of diode D11 links to each other with the anode of light-emitting diode D12, the cathode terminal of light-emitting diode D12 connects the collector electrode that a resistance R 9 arrives NPN triode Q2 afterwards, the emitter terminal of NPN triode Q2 links to each other with the negative electrode of rectification circuit B, and NPN triode Q2 is furnished with biasing circuit, thereby forms electric loop.
When reset mode, triode Q1 conducting, light-emitting diode D12 cathode potential is directly provided by rectification circuit A, so light-emitting diode D12 cathode potential is extinguished state than the light-emitting diode D12 anode height after the R2 dividing potential drop so light-emitting diode D12 is in.
When trip status, because the output no current, so the output no current of rectification circuit B, light-emitting diode D12 is in and extinguishes state.
When coil fault such as coil have broken, this moment, controllable silicon SCR was by, triode Q1 conducting, elasticity moving contact K off-state, form the loop by resistance R 2, R6, diode D9, light-emitting diode D12, diode D10, triode Q1 and rectification circuit A, A provides power supply by rectification circuit, so light-emitting diode D12 is in luminance.
Can not normally disconnect as elasticity moving contact K when elasticity moving contact K is stuck, controllable silicon SCR conducting this moment, triode Q1 end, coil is in off position, power input is directly transmitted electricity to the circuit breaker output, rectification circuit B has electric current output, failure indicating circuit work, light-emitting diode D12 luminance.
When the backward error wiring, the breaker connection output is charged, rectification circuit B work, and failure indicating circuit work, light-emitting diode D12 is luminous.
In a word, light-emitting diode D12 circuit breaker normally reset and trip status under not luminous, break down or during the backward error wiring, light-emitting diode D12 is luminous, the indicating circuit fault at circuit breaker.
As shown in Figure 2, first kind of embodiment of the present invention, between the anode of rectification circuit B and negative electrode, connect the charged indicating circuit of wiring output, the charged indicating circuit of wiring output comprises light-emitting diode D13 and NPN type triode Q3, the anode of light-emitting diode D13 is connected with the anode of rectification circuit B, the junction of the biasing circuit of the negative electrode of light-emitting diode D13 and triode Q2 connects the collector electrode of NPN type triode Q3, the emitter of NPN type triode Q3 connects the negative electrode of rectification circuit B, and the base stage of NPN type triode Q3 is connected to signal control circuit.The anode of light-emitting diode D13 can also link to each other with the anode of rectification circuit B by a resistance in the present embodiment.
When reset mode, triode Q3 conducting, rectification circuit B work is so light-emitting diode D13 is in luminance.
When trip status, because the output no current, so the output no current of rectification circuit B, light-emitting diode D13 is in and extinguishes state.
Work as coil fault, so the output no current of rectification circuit B, light-emitting diode D13 is in and extinguishes state.
K is stuck when the elasticity moving contact, controllable silicon SCR conducting this moment, and triode Q3 ends, power input is directly transmitted electricity to the circuit breaker output, and rectification circuit B has electric current output, and electric current is by the biasing circuit of D13 and triode Q2, form the loop, light-emitting diode D13 luminance.
When the backward error wiring, the breaker connection output is charged, rectification circuit B work, and failure indicating circuit work, light-emitting diode D13 is luminous.
In a word, under the charged situation of wiring output of circuit breaker, light-emitting diode D13 is luminous, and other situations are all not luminous, the charged situation of indication wiring output.
As Fig. 3, as shown in Figure 4, between the anode of rectification circuit B and negative electrode, connect the indicating circuit that resets.
As shown in Figure 3, second kind of embodiment of the present invention, the indicating circuit that resets comprises light-emitting diode D13 and NPN type triode Q3, a resistance R 15 is inserted in the junction of the anode of rectification circuit B and NPN triode Q2 biasing circuit, biasing circuit is connected the junction of resistance R 15 and light-emitting diode D13, one end of resistance R 15 links to each other with the anode of rectification circuit B, the other end links to each other with the anode of light-emitting diode D13, the negative electrode of light-emitting diode D13 links to each other with the collector electrode of NPN type triode Q3, the emitter of NPN type triode Q3 connects the negative electrode of rectification circuit B, and the base stage of NPN type triode Q3 is connected to signal control circuit.
When reset mode, triode Q3 conducting, rectification circuit B work is so light-emitting diode D13 is in luminance.
When trip status, because the output no current, so the output no current of rectification circuit B, light-emitting diode D13 is in and extinguishes state.
Work as coil fault, so the output no current of rectification circuit B, light-emitting diode D13 is in and extinguishes state.
K is stuck when the elasticity moving contact, controllable silicon SCR conducting this moment, and triode Q3 ends, and light-emitting diode D13 extinguishes state.
When the backward error wiring, the output of rectification circuit A no current, triode Q3 ends, and light-emitting diode D13 is in and extinguishes state.
In a word, under the normal reset case of being in of circuit breaker, light-emitting diode D13 is luminous, and other situations are all not luminous, the D13 indication that resets.
As shown in Figure 4, the third embodiment of the present invention, the indicating circuit that resets comprises light-emitting diode D13, NPN type triode Q3 and positive-negative-positive triode Q4, the collector electrode of NPN type triode Q3 connects the base stage of NPN type triode Q2, the base stage of NPN type triode Q3 is with after the base stage of positive-negative-positive triode Q4 links to each other, its common point inserts signal control circuit, the collector electrode of positive-negative-positive triode Q4 and NPN type triode Q3 emitter are all received the negative electrode of rectification circuit B, the emitter of positive-negative-positive triode Q4 is received the anode of rectification circuit B by a resistance R 15, the branch road that parallel connection one is made up of light-emitting diode D13 and resistance R 17 between the emitter and collector of positive-negative-positive triode Q4, the anode of light-emitting diode D13 links to each other with the emitter of positive-negative-positive triode Q4, the negative electrode of light-emitting diode links to each other with an end of resistance R 17, and the other end of resistance R 17 links to each other with the collector electrode of positive-negative-positive triode Q4.
When reset mode, triode Q3 conducting, rectification circuit B work is so light-emitting diode D13 is in luminance.
When trip status, because the output no current, so the output no current of rectification circuit B, light-emitting diode D13 is in and extinguishes state.
Work as coil fault, so the output no current of rectification circuit B, light-emitting diode D13 is in and extinguishes state.
K is stuck when the elasticity moving contact, controllable silicon SCR conducting this moment, and PNP triode Q4 conducting, the branch road that Light-Emitting Diode and resistance R 17 are formed is by triode Q4 short circuit, and light-emitting diode D13 extinguishes state.
When the backward error wiring, the breaker connection output is charged, the output of rectification circuit A no current, and PNP triode Q4 conducting, the branch road that Light-Emitting Diode and resistance R 17 are formed is by triode Q4 short circuit, and light-emitting diode D13 extinguishes state.
In a word, under the normal reset case of being in of circuit breaker, light-emitting diode D13 is luminous, and other situations are all not luminous, the D13 indication that resets.
Claims (5)
1. ground-fault interrupter, it is characterized in that it comprises input circuit, leak current fault detects amplifying circuit, the ground connection neutral fault detects amplifying circuit, signal control circuit, failure indicating circuit, output circuit, power supply signal arrives signal control circuit by input circuit behind rectification circuit (A), leak current fault detects amplifying circuit generation detection of electrical leakage signal and inputs to signal control circuit, the ground connection neutral fault detects amplifying circuit and produces the Earth Fault Detection signal and export to signal control circuit, and signal control circuit is exported to failure indicating circuit and output circuit respectively after to signal processing.
2. ground-fault interrupter according to claim 1, it is characterized in that failure indicating circuit comprises rectification circuit (B), the anode of rectification circuit (B) links to each other with resistance (R16) end, resistance (R16) other end connects the anode of diode (D11), the negative electrode of diode (D11) links to each other with the anode of light-emitting diode (D12), the cathode terminal of light-emitting diode (D12) connects the collector electrode that a resistance (R9) arrives NPN triode (Q2) afterwards, the emitter terminal of NPN triode (Q2) links to each other with the negative electrode of rectification circuit (B), NPN triode (Q2) is furnished with biasing circuit, thereby forms electric loop.
3. ground-fault interrupter according to claim 2, its feature also is to connect the charged indicating circuit of wiring output between the anode of rectification circuit (B) and negative electrode, the charged indicating circuit of wiring output comprises light-emitting diode (D13) and NPN type triode (Q3), the anode of light-emitting diode (D13) is connected with the anode of rectification circuit (B), the junction of the biasing circuit of the negative electrode of light-emitting diode (D13) and triode (Q2) connects the collector electrode of NPN type triode (Q3), the emitter of NPN type triode (Q3) connects the negative electrode of rectification circuit (B), and the base stage of NPN type triode (Q3) is connected to signal control circuit.
4. ground-fault interrupter according to claim 2, its feature also is to connect the indicating circuit that resets between the anode of rectification circuit (B) and negative electrode, the indicating circuit that resets comprises light-emitting diode (D13) and NPN type triode (Q3), a resistance (R15) is inserted in the junction of the anode of rectification circuit (B) and NPN triode (Q2) biasing circuit, biasing circuit is connected the junction of resistance (R15) and light-emitting diode (D13), one end of resistance (R15) links to each other with the anode of rectification circuit (B), the other end links to each other with the anode of light-emitting diode (D13), the negative electrode of light-emitting diode (D13) links to each other with the collector electrode of NPN type triode (Q3), the emitter of NPN type triode (Q3) connects the negative electrode of rectification circuit (B), and the base stage of NPN type triode (Q3) is connected to signal control circuit.
5. ground-fault interrupter according to claim 2, its feature also is to connect the indicating circuit that resets between the anode of rectification circuit (B) and negative electrode, the indicating circuit that resets comprises light-emitting diode (D13), NPN type triode (Q3) and positive-negative-positive triode (Q4), the collector electrode of NPN type triode (Q3) connects the base stage of NPN type triode (Q2), the base stage of NPN type triode (Q3) is with after the base stage of positive-negative-positive triode (Q4) links to each other, its common point inserts signal control circuit, the collector electrode of positive-negative-positive triode (Q4) and NPN type triode (Q3) emitter are all received the negative electrode of rectification circuit (B), the emitter of positive-negative-positive triode (Q4) is received the anode of rectification circuit (B) by a resistance (R15), the branch road that parallel connection one is made up of light-emitting diode (D13) and resistance (R17) between the emitter and collector of positive-negative-positive triode (Q4), the anode of light-emitting diode (D13) links to each other with the emitter of positive-negative-positive triode (Q4), the negative electrode of light-emitting diode links to each other with an end of resistance (R17), and (other end of R17 links to each other with the collector electrode of positive-negative-positive triode (Q4) resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100278855A CN100433481C (en) | 2005-07-18 | 2005-07-18 | Earth fault breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100278855A CN100433481C (en) | 2005-07-18 | 2005-07-18 | Earth fault breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1734876A true CN1734876A (en) | 2006-02-15 |
| CN100433481C CN100433481C (en) | 2008-11-12 |
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ID=36077132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100278855A Expired - Fee Related CN100433481C (en) | 2005-07-18 | 2005-07-18 | Earth fault breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100433481C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009026782A1 (en) * | 2007-08-24 | 2009-03-05 | Jun Han | Safety switch and control method thereof |
| CN100517896C (en) * | 2006-07-24 | 2009-07-22 | 苏州松宝电气有限公司 | Control circuit of ground fault circuit breaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2279189A (en) * | 1993-06-15 | 1994-12-21 | Sheir Chun Lam | Earth fault circuit breaker |
| US6266219B1 (en) * | 1998-06-02 | 2001-07-24 | Pass & Seymour, Inc. | Combination ground fault and arc fault circuit interrupter |
| US6522510B1 (en) * | 2000-11-21 | 2003-02-18 | Pass & Seymour, Inc. | Ground fault circuit interrupter with miswire protection and indicator |
| KR200312397Y1 (en) * | 2003-01-15 | 2003-05-13 | 세기이테크 주식회사 | Auto recovering Earth Leakage Ciruilt Breakers |
| US6937452B2 (en) * | 2003-02-03 | 2005-08-30 | Leviton Manufacturing Co., Inc. | Reverse wiring detect in circuit interrupting devices |
-
2005
- 2005-07-18 CN CNB2005100278855A patent/CN100433481C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100517896C (en) * | 2006-07-24 | 2009-07-22 | 苏州松宝电气有限公司 | Control circuit of ground fault circuit breaker |
| WO2009026782A1 (en) * | 2007-08-24 | 2009-03-05 | Jun Han | Safety switch and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100433481C (en) | 2008-11-12 |
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Granted publication date: 20081112 |