CN100433481C - Earth fault breaker - Google Patents
Earth fault breaker Download PDFInfo
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- CN100433481C CN100433481C CNB2005100278855A CN200510027885A CN100433481C CN 100433481 C CN100433481 C CN 100433481C CN B2005100278855 A CNB2005100278855 A CN B2005100278855A CN 200510027885 A CN200510027885 A CN 200510027885A CN 100433481 C CN100433481 C CN 100433481C
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Abstract
The present invention relates to an earth fault circuit breaker which comprises an input circuit, an electric leakage fault detecting and amplifying circuit, a neutral earth fault detecting and amplifying circuit, a signal control circuit, a fault indication circuit and an output circuit, wherein power supply signal is input into the signal control circuit through the input circuit after passing through a rectification circuit (A). The electric leakage fault detecting and amplifying circuit and the neutral earth fault detecting and amplifying circuit produce detection signal which is then output to the signal control circuit, and the signal is respectively output to the fault indication circuit and the output circuit after processed by the signal control 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, actuating coil J is also along with quitting work, circuit breaker elasticity moving contact K disconnects, 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 the indicating circuit of indication ground-fault interrupter faults itself or backward error wiring.
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 the first 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 the second rectification circuit B, the anode of the second rectification circuit B links to each other with first resistance R, 16 1 ends, first 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 the first light-emitting diode D12, the cathode terminal of the first light-emitting diode D12 is connected to the collector electrode of a NPN triode Q2 by second resistance R 9, the emitter terminal of the one NPN triode Q2 links to each other with the negative electrode of the second rectification circuit B, the base stage of the one NPN triode Q2 is connected to biasing circuit, and the base stage of a NPN triode Q2 connects the anode of the second rectification circuit B through biasing circuit.
In order better to reflect the operating state of circuit breaker, can also between the anode of the second 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 the first 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.
As Fig. 2, Fig. 3, failure indicating circuit shown in Figure 4 comprises the second rectification circuit B, the anode of the second rectification circuit B links to each other with first resistance R, 16 1 ends, first 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 the first light-emitting diode D12, the cathode terminal of the first light-emitting diode D12 is connected to the collector electrode of a NPN triode Q2 by second resistance R 9, the emitter terminal of the one NPN triode Q2 links to each other with the negative electrode of the second rectification circuit B, the base stage of the one NPN triode Q2 is connected to biasing circuit, and the base stage of a NPN triode Q2 connects the anode of the second rectification circuit B through biasing circuit.
When reset mode, triode Q1 conducting, the first light-emitting diode D12 cathode potential is directly provided by the first rectification circuit A, so the first light-emitting diode D12 cathode potential is extinguished state than the first light-emitting diode D12 anode height after resistance R 2 dividing potential drops so the first light-emitting diode D12 is in.
When trip status, because the output no current, so the output no current of the second rectification circuit B, the first 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, the first light-emitting diode D12, diode D10, triode Q1 and the first rectification circuit A, provide power supply by the first rectification circuit A, so the first 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, the second rectification circuit B has electric current output, failure indicating circuit work, the first light-emitting diode D12 is in luminance.
When the backward error wiring, the breaker connection output is charged, second rectification circuit B work, and failure indicating circuit work, the first light-emitting diode D12 is luminous.
In a word, the first light-emitting diode D12 circuit breaker normally reset and trip status under not luminous, break down or during the backward error wiring, the first 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 the second rectification circuit B and negative electrode, connect the charged indicating circuit of wiring output, the charged indicating circuit of wiring output comprises the second light-emitting diode D13 and the 2nd NPN type triode Q3, the anode of the second light-emitting diode D13 is connected with the anode of the second rectification circuit B, the first biasing resistor R13, one end in the biasing circuit of the negative electrode of the second light-emitting diode D13 and a NPN triode Q2 is connected, the other end of the first biasing resistor R13 connects the base stage of a NPN triode Q2, promptly the anode of the second rectification circuit B is through the second light-emitting diode D13, the first biasing resistor R13 of biasing circuit connects the base stage of a NPN triode Q2, the collector electrode of the 2nd NPN type triode Q3 is connected with the negative electrode of the second light-emitting diode D13, the emitter of the 2nd NPN type triode Q3 connects the negative electrode of the second rectification circuit B, and the base stage of the 2nd NPN type triode Q3 is connected to signal control circuit.The anode of the second light-emitting diode D13 can also link to each other with the anode of the second rectification circuit B by a resistance in the present embodiment.
When reset mode, the 2nd NPN type triode Q3 conducting, second rectification circuit B work is so the second light-emitting diode D13 is in luminance.
When trip status, because the output no current, so the output no current of the second rectification circuit B, the second light-emitting diode D13 is in and extinguishes state.
Work as coil fault, so the output no current of the second rectification circuit B, the second light-emitting diode D13 is in and extinguishes state.
K is stuck when the elasticity moving contact, controllable silicon SCR conducting this moment, the 2nd NPN type triode Q3 ends, power input is directly transmitted electricity to the circuit breaker output, the second rectification circuit B has electric current output, electric current forms the loop by the biasing circuit of the second light-emitting diode D13 and a NPN type triode Q2, and the second light-emitting diode D13 is in luminance.
When the backward error wiring, the breaker connection output is charged, second rectification circuit B work, and failure indicating circuit work, the second light-emitting diode D13 is luminous.
In a word, under the charged situation of wiring output of circuit breaker, the second 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 the second 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 the second light-emitting diode D13 and the 2nd NPN type triode Q3, the anode of the second rectification circuit B links to each other with the anode of the second light-emitting diode D13 by the 3rd resistance R 15, the end of the first biasing resistor R13 in the one NPN triode Q2 biasing circuit is connected the junction of the 3rd resistance R 15 and the second light-emitting diode D13 anode, the negative electrode of the second light-emitting diode D13 links to each other with the collector electrode of the 2nd NPN type triode Q3, the emitter of the 2nd NPN type triode Q3 connects the negative electrode of the second rectification circuit B and connects the base stage of a NPN triode Q2 by the second biasing resistor R14 in the biasing circuit, and the base stage of the 2nd NPN type triode Q3 is connected to signal control circuit.
When reset mode, the 2nd NPN type triode Q3 conducting, second rectification circuit B work is so the second light-emitting diode D13 is in luminance.
When trip status, because the output no current, so the output no current of the second rectification circuit B, the second light-emitting diode D13 is in and extinguishes state.
Work as coil fault, so the output no current of the second rectification circuit B, the second light-emitting diode D13 is in and extinguishes state.
K is stuck when the elasticity moving contact, controllable silicon SCR conducting this moment, and the 2nd NPN type triode Q3 ends, and the second light-emitting diode D13 is in and extinguishes state.
When the backward error wiring, the output of the first rectification circuit A no current, the 2nd NPN type triode Q3 ends, and the second light-emitting diode D13 is in and extinguishes state.
In a word, be under the normal reset case at circuit breaker, the second light-emitting diode D13 is luminous, and other situations are all not luminous, and the second light-emitting diode D13 is in the indication that resets.
As shown in Figure 4, the third embodiment of the present invention, the indicating circuit that resets comprises the second light-emitting diode D13, the 2nd NPN type triode Q3 and positive-negative-positive triode Q4, the collector electrode of the 2nd NPN type triode Q3 connects the base stage of a NPN type triode Q2, the base stage of the 2nd 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 the 2nd NPN type triode Q3 emitter are all received the negative electrode of the second rectification circuit B, and the 2nd NPN type triode Q3 emitter connects the base stage of a NPN triode Q2 by the second biasing resistor R14 in the biasing circuit, the emitter of positive-negative-positive triode Q4 is received the anode of the second rectification circuit B by the 3rd resistance R 15, the branch road that parallel connection one is made up of the second light-emitting diode D13 and the 4th resistance R 17 between the emitter and collector of positive-negative-positive triode Q4, the anode of the second light-emitting diode D13 links to each other with the emitter of positive-negative-positive triode Q4, the negative electrode of the second light-emitting diode D13 links to each other with an end of the 4th resistance R 17, and the other end of the 4th resistance R 17 links to each other with the collector electrode of positive-negative-positive triode Q4.
When reset mode, the 2nd NPN type triode Q3 conducting, second rectification circuit B work is so the second light-emitting diode D13 is in luminance.
When trip status, because the output no current, so the output no current of the second rectification circuit B, the second light-emitting diode D13 is in and extinguishes state.
Work as coil fault, so the output no current of the second rectification circuit B, the second 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 the second light-emitting diode D13 and the 4th resistance R 17 are formed is by triode Q4 short circuit, and the second light-emitting diode D13 is in and extinguishes state.
When the backward error wiring, the breaker connection output is charged, the output of the first rectification circuit A no current, PNP triode Q4 conducting, the branch road that the second light-emitting diode D13 and the 4th resistance R 17 are formed is by PNP triode Q4 short circuit, and the second light-emitting diode D13 is in and extinguishes state.
In a word, under the normal reset case of being in of circuit breaker, the second light-emitting diode D13 is luminous, and other situations are all not luminous, the D13 indication that resets.
Claims (4)
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 first rectification circuit (A), leak current fault detects amplifying circuit and links to each other with incoming line, input circuit is carried out detection of electrical leakage, produce the detection of electrical leakage signal and input to signal control circuit, the ground connection neutral fault detects amplifying circuit and links to each other with input circuit, input circuit is carried out Earth Fault Detection, produce the Earth Fault Detection signal and export to signal control circuit, signal control circuit is exported to failure indicating circuit and output circuit respectively after to signal processing; Failure indicating circuit comprises second rectification circuit (B), the anode of second rectification circuit (B) links to each other with first resistance (R16) end, first resistance (R16) other end connects the anode of diode (D11), the negative electrode of diode (D11) links to each other with the anode of first light-emitting diode (D12), the cathode terminal of first light-emitting diode (D12) is connected to the collector electrode of a NPN triode (Q2) by second resistance (R9), the emitter terminal of the one NPN triode (Q2) links to each other with the negative electrode of second rectification circuit (B), the base stage of the one NPN triode (Q2) is connected to biasing circuit, and the base stage of a NPN triode (Q2) connects the anode of second rectification circuit (B) through biasing circuit.
2. ground-fault interrupter according to claim 1, its feature also is to connect the charged indicating circuit of wiring output between the anode of second rectification circuit (B) and negative electrode, the charged indicating circuit of wiring output comprises second light-emitting diode (D13) and the 2nd NPN type triode (Q3), the anode of second light-emitting diode (D13) is connected with the anode of second rectification circuit (B), first biasing resistor (R13) end in the biasing circuit of the negative electrode of second light-emitting diode (D13) and a NPN triode (Q2) is connected, the other end of first biasing resistor (R13) connects the base stage of a NPN triode (Q2), the collector electrode of the 2nd NPN type triode (Q3) is connected with the negative electrode of second light-emitting diode (D13), the emitter of the 2nd NPN type triode (Q3) connects the negative electrode of second rectification circuit (B), and the 2nd NPN type triode (Q3) emitter is by the base stage of the connection of second biasing resistor (R14) in the biasing circuit the one NPN triode (Q2), and the base stage of the 2nd NPN type triode (Q3) is connected to signal control circuit.
3. ground-fault interrupter according to claim 1, its feature also is to connect the indicating circuit that resets between the anode of second rectification circuit (B) and negative electrode, the indicating circuit that resets comprises second light-emitting diode (D13) and the 2nd NPN type triode (Q3), the anode of second rectification circuit (B) links to each other with the anode of second light-emitting diode (D13) by the 3rd resistance (R15), one end of first biasing resistor (R13) in the one NPN triode (Q2) biasing circuit is connected the junction of the 3rd resistance (R15) and second light-emitting diode (D13) anode, the negative electrode of second light-emitting diode (D13) links to each other with the collector electrode of the 2nd NPN type triode (Q3), the emitter of the 2nd NPN type triode (Q3) connects the negative electrode of second rectification circuit (B) and passes through the base stage of second biasing resistor (R14) connection the one NPN triode (Q2) in the biasing circuit, and the base stage of the 2nd NPN type triode (Q3) is connected to signal control circuit.
4. ground-fault interrupter according to claim 1, its feature also is to connect the indicating circuit that resets between the anode of second rectification circuit (B) and negative electrode, the indicating circuit that resets comprises second light-emitting diode (D13), the 2nd NPN type triode (Q3) and positive-negative-positive triode (Q4), the collector electrode of the 2nd NPN type triode (Q3) connects the base stage of a NPN triode (Q2), the base stage of the 2nd 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 the 2nd NPN type triode (Q3) emitter are all received the negative electrode of second rectification circuit (B), and the 2nd NPN type triode (Q3) emitter connects the base stage of a NPN triode (Q2) by second biasing resistor (R14) in the biasing circuit, the emitter of positive-negative-positive triode (Q4) is received the anode of second rectification circuit (B) by the 3rd resistance (R15), the branch road that parallel connection one is made up of second light-emitting diode (D13) and the 4th resistance (R17) between the emitter and collector of positive-negative-positive triode (Q4), the anode of second light-emitting diode (D13) links to each other with the emitter of positive-negative-positive triode (Q4), the negative electrode of second light-emitting diode (D13) links to each other with an end of the 4th resistance (R17), and the other end of the 4th resistance (R17) links to each other with the collector electrode of positive-negative-positive triode (Q4).
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 CN1734876A (en) | 2006-02-15 |
| CN100433481C true CN100433481C (en) | 2008-11-12 |
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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) |
Families Citing this family (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 |
| CN100576673C (en) * | 2007-08-24 | 2009-12-30 | 韩俊 | The control method of Electrical Safety protection switch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043392C (en) * | 1993-06-15 | 1999-05-12 | 林社振 | Earth fault circuit breaker |
| US6266219B1 (en) * | 1998-06-02 | 2001-07-24 | Pass & Seymour, Inc. | Combination ground fault and arc fault circuit interrupter |
| CN1518032A (en) * | 2003-01-15 | 2004-08-04 | Seikie E-Tech��ʽ���� | Automatic reset earth leakage breaker |
| US20040257725A1 (en) * | 2003-02-03 | 2004-12-23 | David Chan | Reverse wiring detect in circuit interrupting devices |
| US6856498B1 (en) * | 2000-11-21 | 2005-02-15 | Pass & Seymour, Inc. | Ground fault circuit interrupter with indicator lamp and protective circuit powered from hot bus bar of interrupting contacts |
-
2005
- 2005-07-18 CN CNB2005100278855A patent/CN100433481C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043392C (en) * | 1993-06-15 | 1999-05-12 | 林社振 | Earth fault circuit breaker |
| US6266219B1 (en) * | 1998-06-02 | 2001-07-24 | Pass & Seymour, Inc. | Combination ground fault and arc fault circuit interrupter |
| US6856498B1 (en) * | 2000-11-21 | 2005-02-15 | Pass & Seymour, Inc. | Ground fault circuit interrupter with indicator lamp and protective circuit powered from hot bus bar of interrupting contacts |
| CN1518032A (en) * | 2003-01-15 | 2004-08-04 | Seikie E-Tech��ʽ���� | Automatic reset earth leakage breaker |
| US20040257725A1 (en) * | 2003-02-03 | 2004-12-23 | David Chan | Reverse wiring detect in circuit interrupting devices |
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| Publication number | Publication date |
|---|---|
| CN1734876A (en) | 2006-02-15 |
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Granted publication date: 20081112 |