CN2652004Y - Automatic leakage and cut-off protector - Google Patents
Automatic leakage and cut-off protector Download PDFInfo
- Publication number
- CN2652004Y CN2652004Y CN 200320106341 CN200320106341U CN2652004Y CN 2652004 Y CN2652004 Y CN 2652004Y CN 200320106341 CN200320106341 CN 200320106341 CN 200320106341 U CN200320106341 U CN 200320106341U CN 2652004 Y CN2652004 Y CN 2652004Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- relay
- control circuit
- protector
- holding circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001012 protector Effects 0.000 title abstract description 10
- 238000010586 diagram Methods 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an automatic power-off and leakage protector, which comprises an insulating shell, a circuit board, a power plug, a socket and various circuit elements welded on the circuit board according to a circuit diagram. A main circuit at the input terminal of the protector is firstly connected with a contact of a control circuit relay and then an output terminal of the protector through a mutual current inductor. The automatic power-off and leakage protector is capable of automatically cutting off power supply and ensuring zero voltage on a line from the power source to an electric appliance in case of shutdown, short circuit or circuit leakage for electric appliances. After the electric appliance is restarted or the leakage is eliminated, the power source is restored to supply electric power, showing great safety and convenience. The utility model can be widely used in various household electric appliances.
Description
The utility model relates to a kind of improvement of Protector for electric appliance, and specifically a kind of automatic outage earth leakage protective device is applicable to various household electrical appliance.
In household electrical appliance use; after the electrical equipment shutdown or open circuit fault occurring; on power supply and circuit that electrical equipment is connected, also keeping certain voltage; still have partial circuit energising work in the electrical equipment; both influenced the useful life of electrical equipment, consume electric power meets thunderbolt and encroached on by the voltage in the power circuit again; therefore, often in use increase an appliance cut-off protector.But this protector is that electric leakage is arranged earlier, the protection action is arranged again, so still have certain insecurity; Though a kind of automatic power-off protector is arranged now, and (patent No.: 02213153), after the electrical equipment shutdown or occurring opening circuit, voltage is zero on the circuit between power supply and the electrical equipment, and this protector can not carry out earth leakage protective, function singleness when line electrical leakage.
The purpose of this utility model be to provide a kind of in electrical equipment shutdown, opening circuit appears in electrical equipment or circuit when leak current fault occurring, can cut off the electricity supply automatically and electrical equipment between voltage on the circuit, guarantee the safety of the person and electrical equipment, circuit; After electrical equipment recovers normal boot-strap or leak current fault and removes, automatic outage earth leakage protective device that again can automatic recovery of power supply.
The purpose of this utility model is achieved in that this earth leakage protective device that cuts off the power supply automatically is by insulation crust, circuit board, attaching plug, output socket CZ, power transformer, control circuit relay K
1, control circuit switch triode VT
I, current transformer TA
1And TA
2, the holding circuit relay K
2, holding circuit switch triode VT
4And VT
5, holding circuit switch triode VT
6, amplifying triode VT
2And VT
3, voltage comparator ic
1---IC
4And electric capacity, resistance, diode are welded on the circuit board according to circuit diagram and constitute.Circuit diagram comprises that control circuit, current signal detect amplifying circuit and holding circuit.Two main lines of input are by the contact K of control circuit relay
1After pass two current transformer TA respectively
1And TA
2Link to each other with output; Two current transformer TA
IAnd TA
2Respectively with two amplifying triode VT
2And VT
3And voltage comparator ic
2, IC
3, IC
4, holding circuit switch triode VT
4, VT
5And holding circuit relay K
2Connect.The holding circuit relay K
2By its contact K
2Closure, make control circuit switch triode VT
IWith the control circuit relay K
1Connect the control circuit relay K
1Contact K
1Closed.
When electrical work, electrical equipment is equivalent to certain resistance and resistance R
1Form resitstance voltage divider, its partial pressure value input voltage comparator IC
1In-phase input end, with IC
1The inverting input voltage output high level of comparing, make control circuit switch triode VT
1Conducting.The control circuit relay K
1Must be electric, its contact K
1Closure, two current transformer TA
1, TA
2Detect two current signals on the main line, respectively through amplifying triode VT
2, VT
3Input voltage comparator IC after amplification, the rectification
2, IC
4In-phase input end, output high level, make holding circuit switch triode VT
4, VT
5Conducting, the holding circuit relay K
2Must be electric, its contact K
2Closure makes voltage comparator ic
1All the time export high level, keep control circuit triode VT
1Conducting, make the control circuit relay K
1The contact keep closure state, on two main lines normal input voltage is arranged, but the electrical equipment operate as normal.
After electrical equipment disconnects, two current transformer TA
1, TA
2No detection signal output, voltage comparator ic
2, IC
4Output low level, two holding circuit switch triode VT
4, VT
5End, make the holding circuit relay K
2Dead electricity, normally opened contact K
2Disconnect the control circuit relay K
1Dead electricity, its normally opened contact K
1Disconnect, input and output disconnect, and do not have on the output institute link.
When having leaky to take place on the circuit when the electrical equipment operate as normal, two current transformer TA
1, TA
2Detect the current signal that differs in size on two main lines, through amplifying triode VT
2, VT
3Input voltage comparator IC after amplification, the rectification
3In-phase input end and inverting input, voltage comparator ic
3The output high level makes holding circuit switch triode VT
6Saturation conduction, holding circuit switch triode VT
4Base earth, make triode VT
4End the holding circuit relay K
2Dead electricity, voltage comparator ic
1In-phase input end voltage be lower than inverting input voltage, voltage comparator ic
1Output low level makes control circuit triode VT
1End the control circuit relay K
1Contact K
1Disconnect, output and input are disconnected, cut off the power supply on the output institute link, reach earth leakage protective purpose.After the leak current fault on the circuit is eliminated.When the size of current that two current transformers detect two main lines equates, be input to voltage comparator ic
3The in-phase input end and the voltage of inverting input equate voltage comparator ic
3Output low level, holding circuit switch triode VT
6End holding circuit switch triode VT
4Base earth is eliminated, thereby makes the electrical equipment operate as normal.When using the utility model, the earth leakage protective device that should cut off the power supply automatically directly inserts power supply, and output can be drawn long line circuit closer.
Advantage of the present utility model: when electrical equipment shutdown occurs, opens circuit or circuit when leaky occurring, can cut off the power supply automatically, making power supply voltage to the circuit of electrical equipment is zero, has improved fail safe; When electrical equipment is started shooting or after leak current fault gets rid of again, the power supply automatic recovery of power supply, easy to use.
Below in conjunction with accompanying drawing the utility model is further described:
Accompanying drawing 1 is a subjective schematic diagram of the present utility model
Accompanying drawing 2 is that circuit board component of the present utility model is arranged vertical view
Accompanying drawing 3 is a circuit diagram of the present utility model
Make the utility model with reference to accompanying drawing 1, accompanying drawing 2, accompanying drawing 3: this earth leakage protective device that cuts off the power supply automatically is by insulation crust 1, circuit board 2, attaching plug 3, output socket CZ4, power transformer 5, holding circuit relay K
27, current transformer TA
16 and TA
26
1, amplifying triode VT
210 and VT
310
1, holding circuit switch triode VT
411 and VT
511
1, voltage comparator ic
1---IC
4, the control circuit relay K
18, holding circuit switch triode VT
6And capacitor C
1-C
7, resistance, diode is welded on the circuit board 2 according to circuit diagram and constitutes.Circuit diagram comprises that control circuit, current signal detect amplifying circuit and holding circuit.When connecting, two main lines of input 12,12
1By the control circuit relay K
18 contact K
1, pass two current transformer TA respectively
16 and TA
26
1Be connected with output; Two current transformer TA
16 and TA
26
1Respectively with two amplifying triode VT
210 and VT
310
1, voltage comparator ic
2, IC
3, IC
4Reach three holding circuit switch triodes, holding circuit relay K
27 link to each other; The holding circuit relay K
27 by its contact K
2Closure, make control circuit switch triode VT
19 and voltage comparator ic
1, the control circuit relay K
18 connect the control circuit relay K
18 contact K
1Closed.
Claims (1)
1, a kind of automatic outage earth leakage protective device is by insulation crust (1), circuit board (2), attaching plug (3), output socket CZ (4), power transformer (5), holding circuit relay K
2(7), current transformer TA
1(6) and TA
2(6
1), amplifying triode VT
2(10) and VT
3(10
1), holding circuit switch triode VT
4(11) and VT
5(11
1), voltage comparator ic
1---IC
4, the control circuit relay K
1(8), holding circuit switch triode VT
6And capacitor C
1-C
7, resistance, diode is welded on circuit board (2) according to circuit diagram and goes up and constitute, circuit diagram comprises that control circuit, current signal detect amplifying circuit and holding circuit, is characterized in that two main lines of input (12), (12
1) by the control circuit relay K
1(8) contact K
1, pass two current transformer TA respectively
1(6) and TA
2(6
1) be connected with output; Two current transformer TA
1(6) and TA
2(6
1) respectively with two amplifying triode VT
2(10) and VT
3(10
1), voltage comparator ic
2, IC
3, IC
4Reach three holding circuit switch triodes, holding circuit relay K
2(7) connect; The holding circuit relay K
2(7) by its contact K
2Closure, make control circuit switch triode VT
1(9) and voltage comparator ic
1, the control circuit relay K
1(8) connect the control circuit relay K
1(8) contact K
1Closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320106341 CN2652004Y (en) | 2003-10-21 | 2003-10-21 | Automatic leakage and cut-off protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320106341 CN2652004Y (en) | 2003-10-21 | 2003-10-21 | Automatic leakage and cut-off protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2652004Y true CN2652004Y (en) | 2004-10-27 |
Family
ID=34341624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320106341 Expired - Lifetime CN2652004Y (en) | 2003-10-21 | 2003-10-21 | Automatic leakage and cut-off protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2652004Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685977A (en) * | 2008-09-25 | 2010-03-31 | 上海申瑞电力科技股份有限公司 | Power supply circuit for electric pole control mechanism |
| CN102509933A (en) * | 2011-10-29 | 2012-06-20 | 常熟市董浜镇华进电器厂 | Multifunctional power socket |
| CN105914706A (en) * | 2016-06-27 | 2016-08-31 | 毛春梅 | An anti-shock power transformer |
| CN106786360A (en) * | 2015-11-24 | 2017-05-31 | 浙江省机电产品质量检测所 | A kind of RCCB carries out the servicing unit of residual current test when loading |
-
2003
- 2003-10-21 CN CN 200320106341 patent/CN2652004Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685977A (en) * | 2008-09-25 | 2010-03-31 | 上海申瑞电力科技股份有限公司 | Power supply circuit for electric pole control mechanism |
| CN102509933A (en) * | 2011-10-29 | 2012-06-20 | 常熟市董浜镇华进电器厂 | Multifunctional power socket |
| CN106786360A (en) * | 2015-11-24 | 2017-05-31 | 浙江省机电产品质量检测所 | A kind of RCCB carries out the servicing unit of residual current test when loading |
| CN105914706A (en) * | 2016-06-27 | 2016-08-31 | 毛春梅 | An anti-shock power transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131021 Granted publication date: 20041027 |