CN202268696U - Electric wiring protection device for detecting power supply false wiring condition - Google Patents
Electric wiring protection device for detecting power supply false wiring condition Download PDFInfo
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- CN202268696U CN202268696U CN2011203413582U CN201120341358U CN202268696U CN 202268696 U CN202268696 U CN 202268696U CN 2011203413582 U CN2011203413582 U CN 2011203413582U CN 201120341358 U CN201120341358 U CN 201120341358U CN 202268696 U CN202268696 U CN 202268696U
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Abstract
The present utility model relates to an electric wiring protection device for detecting a using power supply false wiring condition in a situation that voltage difference between a ground line and a zero line is not large. The electric wiring protection device of an embodiment comprises a phase line conductor (110), a zero line conductor (120), a ground line conductor (130), a switch device (140), a residual current detection circuit (150), a voltage difference detection circuit (160), a signal processing circuit (170) and an excitation device. The signal processing circuit is at least responded to one of predetermined error conditions of the residual current detection signal and the voltage difference detection signal to generate a driving signal, the excitation device is responded to the driving signal and used for driving the switch device to lie in a second position, thus electric connection of the input side and the output side can be cut off. The above function can be realized without people, detection and motion functions can be automatically competed, and on-line voltage-withstanding test requirements of electric appliance manufacturers can be satisfied.
Description
Technical field
The utility model relates to Electrical Safety protection field, relates in particular to the electric Wiring protection device of the breaking characteristics that have between input and the output.
Background technology
Because terminal block is lack of standardization, might there be false wiring in the power supply of household electrical appliance, for example with phase line and zero line improved cross connect; Make zero line charged, or ground wire is linked to each other with phase line, make ground wire electrification; Be prone to cause the casing insulation decreased performance of electrical appliance or charged like this, cause electric shock accidents to take place.
Existing Aftercurrent protecting equipment with detection power supply wiring status function all is to detect the residual current that phase line produces over the ground, the power supply of cutting off the electricity supply when reaching set point.Usually the method that detects ground wire electrification is to be connected between zero line and the ground wire with other similar electronic components such as resistance, neon lamp or optocouplers, lights or optocoupler time limit has to export and warns danger through neon lamp.These class methods are owing to select the resistance of big resistance for use, could accomplish detection when needing ground wire and zero line that voltage difference is arranged greatly.For protecting personal safety as far as possible, hoping just can have defencive function when ground wire has the 36V potential difference with respect to zero line, adopts conventional method to be difficult to realize.
Therefore need a kind of new electric Wiring protection device, need not just can detect under the very big situation false wiring situation of using supply socket, cut off the power supply of electrical appliance at the pressure reduction between ground wire and the zero line.
The utility model content
A main purpose of the utility model is, overcomes above-mentioned defective of the prior art, provides a kind of and need not just can detect under the very big situation the electric Wiring protection device that uses power supply false wiring situation at the pressure reduction between ground wire and the zero line.
In one embodiment, a kind of electric Wiring protection device is provided, it comprises:
Phase conductor, zero line conductor, gnd conductor;
Switching device makes said phase conductor, zero line conductor, gnd conductor be in conducting state when being configured to be in primary importance, and makes said phase conductor, zero line conductor, gnd conductor be in off state when being in the second place;
The residual current testing circuit is configured to detect the residual current of said phase conductor and zero line conductor;
Voltage difference detection circuits is configured to detect the voltage difference between said gnd conductor and the zero line conductor;
Signal processing circuit is coupled to said residual current testing circuit, voltage difference detection circuits, is configured at least one of the predetermined error conditions in response to residual current detection signal and voltage difference detection signal and produces drive signal;
Exciting bank is coupled to said signal drive circuit, is configured to order about said switching device in response to said drive signal and is in the said second place.
In an embodiment of electric Wiring protection device; Said residual current testing circuit comprises a current transformer; Said phase conductor and zero line conductor are first elementary as this current transformer, and this current transformer secondary is coupled to said signal processing circuit; The input of said voltage difference detection circuits is connected respectively to said gnd conductor and said zero line conductor.
In an embodiment of electric Wiring protection device, the second elementary of said current transformer is coupled in the output of said voltage difference detection circuits, thereby is coupled to said signal processing circuit.
In an embodiment of electric Wiring protection device, said zero line conductor is connected to the ground of said electric Wiring protection device, and said voltage difference detection circuits is connected respectively to the ground of said gnd conductor and said electric Wiring protection device.
In an embodiment of electric Wiring protection device, said signal processing circuit comprises thyristor, and the output of said voltage difference detection circuits is directly coupled to the control utmost point of said thyristor.
In an embodiment of electric Wiring protection device, the output of said voltage difference detection circuits is coupled to said signal processing circuit through an optic coupling element.
In an embodiment of electric Wiring protection device, said voltage difference detection circuits comprises a silicon bidirectional trigger diode.
The electric Wiring protection device that the utility model provided has the following advantages: circuit structure is simple; On the basis that does not influence original residual current acting performance; Increase the power failure voltage that electrical appliance is used and judged, can detect the fault state of ground wire electrification or phase line zero line improved cross connect.Particularly need not just to judge preferably under the very big situation the dangerous wiring state that pressure reduction is arranged when between the zero line of supply socket and ground wire at the pressure reduction between ground wire and the zero line; And break off being electrically connected of electrical appliance and power supply, protection electrical appliance user's personal safety in the case.And the realization of above-mentioned functions does not need the people to participate in, and accomplishes automatically and detects holding function, can satisfy electrical appliance manufacturer's online voltage-withstand test requirement again.
Description of drawings
Through reading the detailed description of doing with reference to following accompanying drawing that non-limiting example is done, the other features, objects and advantages of the utility model will become more apparent:
Fig. 1 shows the circuit diagram according to the electric Wiring protection device 100 of an embodiment of the utility model;
Fig. 2 shows the circuit diagram according to the electric Wiring protection device 200 of an embodiment of the utility model;
Fig. 3 shows the circuit diagram according to the electric Wiring protection device 300 of an embodiment of the utility model;
Fig. 4 shows the circuit diagram according to the electric Wiring protection device 400 of an embodiment of the utility model;
Fig. 5 shows the circuit diagram according to the electric Wiring protection device 500 of an embodiment of the utility model;
Fig. 6 shows the circuit diagram according to the electric Wiring protection device 600 of an embodiment of the utility model;
In the drawings, run through different diagrammatic sketch, identical or similar Reference numeral is represented characteristic of correspondence.
Embodiment
Fig. 1 shows the circuit diagram according to the electric Wiring protection device 100 of an embodiment of the utility model.As shown in the figure, electric Wiring protection device 100 comprises: phase conductor 110, zero line conductor 120, gnd conductor 130, switching device 140, residual current testing circuit 150, voltage difference detection circuits 160, signal processing circuit 170 and exciting bank 180.
Phase conductor 110 comprises input terminal 111 and outlet terminal 117.Zero line conductor 120 comprises input terminal 121 and outlet terminal 127.Gnd conductor 130 comprises input terminal 131 and outlet terminal 137.Input terminal 111,121,131 is arranged, is fixed according to certain standard usually, and stretches out from the shell of Wiring protection device 100, thereby forms plug.Outlet terminal 117,127,137 is respectively applied for the respective terminal that connects electrical appliance.
Switching device 140 makes said phase conductor 110, zero line conductor 120, gnd conductor 130 be in conducting state when being configured to be in primary importance, and makes when being in the second place said phase conductor 110, zero line conductor 120, gnd conductor 130 be in off state.Particularly, the switching device 140 among this embodiment comprises switch 141, the switch 142 in the zero line conductor 120 and the switch 143 in the gnd conductor 130 in the phase conductor 110.Switching device 140 is in primary importance and all is in closure state corresponding to three switches, is in the second place and all is in off-state corresponding to three switches.
Residual current testing circuit 150 is configured to detect the residual current of phase conductor 110 and zero line conductor 120.Particularly; Residual current testing circuit 150 comprises an electric current mutual inductance 151; Phase conductor 110 and zero line conductor 120 form the first elementary of current transformers 151, generate the residual current detection signal by the secondary induction of current transformer 151, and this signal is coupled to signal processing circuit 170.
Voltage difference detection circuits 160 is configured to detect the voltage difference between gnd conductor 130 and the zero line conductor 120.Particularly, in this embodiment, voltage difference detection circuits 160 comprises: capacitor C 7, current-limiting resistance R6, voltage stabilizing didoe ZD etc.Zero line conductor 120 is connected to the ground of electric Wiring protection device, and voltage difference detection circuits 160 is connected respectively to the ground of gnd conductor 130 and electric Wiring protection device.Therefore, gnd conductor 130 is connected to the zero line conductor through capacitor C 7, current-limiting resistance R6, voltage stabilizing didoe ZD.Voltage on the voltage stabilizing didoe ZD is coupled to the control utmost point of thyristor Q1 through resistance R 5 and diode D2.When ground wire conductor 130 is charged, there is AC signal in the voltage difference detection circuits 160 between gnd conductor 130 and zero line conductor 120.Through the parameter adjustment of capacitor C 7, current-limiting resistance R6 and voltage-stabiliser tube ZD, mode of operation that can setting voltage difference detecting circuit 160.Particularly, when potential difference was lower than a set point between ground wire conductor 130 and the zero line conductor 120, voltage-stabiliser tube ZD did not puncture, and the dividing potential drop on the ZD is not enough to trigger thyristor Q1; When the voltage difference between ground wire conductor 130 and the zero line conductor 120 during greater than this set point, voltage-stabiliser tube ZD reverse breakdown, its reverse breakdown voltage can make the D2 forward conduction through resistance R 7, thereby triggers thyristor Q1.For example can the origination action value be set at the 36V voltage to human body safety; When phase conductor 110 and zero line conductor 120 improved cross connects; Under perhaps any other failure conditions that possibly occur; As long as the voltage difference between gnd conductor 130 and the zero line conductor 120 reaches 36V, the voltage on the voltage-stabiliser tube ZD just can make the D2 forward conduction through resistance R 7, thereby triggers thyristor Q1.At the negative half period of AC signal, voltage-stabiliser tube ZD presents diode behavior, to capacitor C 7 discharges, instead not conducting partially of D2 this moment.
Signal processing circuit 170 is coupled to residual current testing circuit 150, voltage difference detection circuits 160, is configured at least one of the predetermined error conditions in response to residual current detection signal and voltage difference detection signal and produces drive signal.
Particularly, signal processing circuit 170 comprises control chip IC1 and thyristor Q1 etc.The predetermined error conditions of residual current detection signal is to surpass a predetermined value, and the predetermined error conditions of voltage difference detection signal is that the voltage difference between gnd conductor 130 and the zero line conductor 120 surpasses another predetermined value; The safety standard that these two predetermined values are followed according to electric Wiring protection device 100 and the detection sensitivity of corresponding device are confirmed.
The power supply signal of signal processing circuit 170 is provided by the halfwave rectifier signal through rectifier diode D1 in the embodiment shown in fig. 1.The output of voltage difference detection circuits 160 is directly coupled to the control utmost point of thyristor Q1.When the voltage on the voltage-stabiliser tube ZD makes the D2 forward conduction through resistance R 7, the thyristor Q1 conducting that is triggered.
The secondary control chip IC1 that is coupled to of current transformer 151.When the residual current detection signal reached its predetermined error conditions, positive level signal of control chip IC1 output was to the control utmost point of thyristor Q1, the thyristor Q1 thereby the conducting that is triggered.
When thyristor Q1 conducting, will flow through big electric current, thereby cause and correspondingly flow through big electric current on the solenoid SOL, this big current signal is drive signal.
Exciting bank 180 is coupled to signal drive circuit 170, is configured to order about said switching device 140 in response to this drive signal and is in the said second place.
Particularly, exciting bank 180 comprises solenoid SOL.Solenoid SOL two ends are connected respectively to the output of phase conductor 110 and signal processing circuit 170.
Coupling between exciting bank 180 and the switching device 140 can adopt the machine driving coupling usually.Also comprise the armature that can move along the radial in the electromagnet that solenoid SOL twined.Three switches, 141,142,143 the return pins of switching device 140 via SR, basically with the radially vertical elements such as snap close of return pin, be coupled to armature through machine driving.When switching device 140 was in primary importance, three switches all were in closure state, the circuit operate as normal.When signal processing circuit 170 produces drive signal because of circuit abnormality; Thereby in solenoid SOL, flow through big electric current, thereby cause that armature moves pulling or bump snap close, thereby snap close breaks away from and the engagement of return pin discharges return pin; Return pin drives related elements makes switch 141,142,143 break off; Thereby switching device 140 is in the second place, and being electrically connected between Wiring protection device 100 input sides and the outlet side is able to cut off, and electrical safety is able to guarantee.
When input side incoming transport power supply, switching device 140 are in primary importance and circuit operate as normal, the LED energising is shinny, with the indication normal operating conditions.The branch road two ends difference cross-over connection that comprises resistance R 5 and switch 102 is in the phase conductor 110 and zero line conductor 120 of current transformer 151 both sides.When close switch 102; On as the elementary phase conductor of current transformer 151 and zero line conductor, produce residual current; Thereby cause that signal processing circuit 170 produces drive signal; Exciting bank 180 makes switching device 140 return to the second place in response to this, cuts off the electrical connection between input side and the outlet side.
Fig. 2 shows the circuit diagram according to the electric Wiring protection device 200 of an embodiment of the utility model.As shown in the figure, electric Wiring protection device 200 comprises: phase conductor 210, zero line conductor 220, gnd conductor 230, switching device 240, residual current testing circuit 250, voltage difference detection circuits 260, signal processing circuit 270 and exciting bank 280.
The circuit setting of electricity Wiring protection device 200 is similar to electric Wiring protection device 100; The main distinction is; The output of voltage difference detection circuits 260 is coupled to control chip IC1, and when the voltage difference between ground wire conductor 130 and the zero line conductor 120 surpassed predetermined value, the reverse breakdown voltage on the voltage-stabiliser tube ZD was coupled to control chip IC1; Control chip IC1 thereby export the control utmost point of a positive level signal to thyristor Q1, the thyristor Q1 thereby the conducting that is triggered.
When thyristor Q1 conducting, will flow through big electric current, thereby cause and correspondingly flow through big electric current on the solenoid SOL, this big current signal is drive signal.Exciting bank 280 is coupled to signal drive circuit 270, is configured to order about said switching device 240 in response to this drive signal and is in the said second place.That is the position all broken off of switch 241,242,243, thereby cut off being electrically connected between Wiring protection device 200 input sides and the outlet side, guaranteed electrical safety.
Fig. 3 shows the circuit diagram according to the electric Wiring protection device 300 of an embodiment of the utility model.As shown in the figure, electric Wiring protection device 300 comprises: phase conductor 310, zero line conductor 320, gnd conductor 330, switching device 340, residual current testing circuit 350, voltage difference detection circuits 360, signal processing circuit 370 and exciting bank 380.
The circuit setting of electricity Wiring protection device 300 is similar to electric Wiring protection device 100, and the main distinction is that voltage difference detection circuits 360 is electrical isolation with signal processing circuit 370.In addition, electric Wiring protection device 300 also comprises rectifier bridge BD.Solenoid SOL two ends are connected respectively to phase conductor 310 and rectifier bridge BD, are that signal processing circuit 370 provides power supply by rectifier bridge BD.In this embodiment, voltage difference detection circuits 360 is connected to the elementary of optocoupler IC2, and signal processing circuit 370 is connected to the secondary of optocoupler IC2.The voltage difference detection signal of voltage difference detection circuits 360 outputs is coupled to the SCR control utmost point through optocoupler IC2.When the voltage difference between ground wire conductor 330 and the zero line conductor 320 during greater than predetermined value; The elementary conducting of optocoupler IC2; Thereby make secondary also conducting; Current flowing resistance R7, R8, thus the control utmost point of a positive level signal to thyristor Q1, the thyristor Q1 thereby the conducting that is triggered exported.
When thyristor Q1 conducting, will flow through big electric current, thereby cause and correspondingly flow through big electric current on the solenoid SOL, this big current signal is drive signal.Exciting bank 380 is coupled to signal drive circuit 370, is configured to order about said switching device 340 in response to this drive signal and is in the said second place.That is the position all broken off of switch 341,342,343, thereby cut off being electrically connected between Wiring protection device 300 input sides and the outlet side, guaranteed electrical safety.
Fig. 4 shows the circuit diagram according to the electric Wiring protection device 400 of an embodiment of the utility model.As shown in the figure, electric Wiring protection device 400 comprises: phase conductor 410, zero line conductor 420, gnd conductor 430, switching device 440, residual current testing circuit 450, voltage difference detection circuits 460, signal processing circuit 470 and exciting bank 480.
The circuit setting of electricity Wiring protection device 400 is similar to electric Wiring protection device 100, and the main distinction is that voltage difference detection circuits 460 is not to be directly coupled to signal processing circuit 470.In this embodiment; When the voltage difference between ground wire conductor 430 and the zero line conductor 420 during greater than predetermined value; Reverse breakdown voltage on the voltage-stabiliser tube ZD is coupled to the second elementary of current transformer 451 through diode D8 and triode Q2; Thereby on current transformer 451 secondary, produce induced signal and be coupled to signal processing circuit 470 (more specifically, being coupled to control chip IC1).In the case, the predetermined error conditions of voltage difference detection signal is also relevant with the detection sensitivity of current transformer 451.When because the signal that the voltage difference detection signal induces on current transformer 451 secondary when reaching its predetermined error conditions; Perhaps when the residual current detection signal reaches its predetermined error conditions; Positive level signal of control chip IC1 output is to the control utmost point of thyristor Q1, the thyristor Q1 thereby the conducting that is triggered.
When thyristor Q1 conducting, will flow through big electric current, thereby cause on rectifier bridge BD and the solenoid SOL and correspondingly flow through big electric current, this big current signal is drive signal.Exciting bank 480 orders about switching device 440 in response to this drive signal and is in the second place, that is the position all broken off of switch 441,442,443, thereby cuts off being electrically connected between Wiring protection device 400 input sides and the outlet side, has guaranteed electrical safety.
Fig. 5 shows the circuit diagram according to the electric Wiring protection device 500 of an embodiment of the utility model.As shown in the figure, electric Wiring protection device 500 comprises: phase conductor 510, zero line conductor 520, gnd conductor 530, switching device 540, residual current testing circuit 550, voltage difference detection circuits 560, signal processing circuit 570 and exciting bank 580.
The circuit setting of electricity Wiring protection device 500 is similar to electric Wiring protection device 100, and the main distinction is, is electrical isolation between voltage difference detection circuits 560 and the signal processing circuit 570.In this embodiment, voltage difference detection circuits 560 comprises capacitor C 7, current-limiting resistance R6, silicon control bidirectional trigger diode DB and diode D6.Wherein silicon control bidirectional diode DB could conducting when voltage reaches certain value, and the conducting after-current can two-way flow.Be similar to the embodiment among Fig. 3, electric Wiring protection device 500 also comprises rectifier bridge BD.Solenoid SOL two ends are connected respectively to phase conductor 510 and rectifier bridge BD, are that signal processing circuit 570 provides power supply by rectifier bridge BD.In this embodiment, the voltage difference detection signal of voltage difference detection circuits 560 outputs is coupled to the elementary of optocoupler IC2, and signal processing circuit 570 is connected to the secondary of optocoupler IC2.The voltage difference detection signal of voltage difference detection circuits 560 outputs is coupled to controllable silicon through optocoupler IC2.When the voltage difference between ground wire conductor 530 and the zero line conductor 520 during, the elementary conducting of optocoupler IC2, thereby make secondary also conducting greater than predetermined value.Current flowing resistance R7, R8, thus the control utmost point of a positive level signal to thyristor Q1, the thyristor Q1 thereby the conducting that is triggered exported.
When thyristor Q1 conducting, will flow through big electric current, thereby cause and correspondingly flow through big electric current on the solenoid SOL, this big current signal is drive signal.Exciting bank 580 is coupled to signal drive circuit 570, is configured to order about said switching device 540 in response to this drive signal and is in the said second place.That is the position all broken off of switch 541,542,543, thereby cut off being electrically connected between Wiring protection device 500 input sides and the outlet side, guaranteed electrical safety.
Fig. 6 shows the circuit diagram according to the electric Wiring protection device 600 of an embodiment of the utility model.As shown in the figure, electric Wiring protection device 600 comprises: phase conductor 610, zero line conductor 620, gnd conductor 630, switching device 640, residual current testing circuit 650, voltage difference detection circuits 660, signal processing circuit 670 and exciting bank 680.
The circuit setting of electricity Wiring protection device 600 is similar to electric Wiring protection device 300, and difference only is to have reduced voltage-stabiliser tube ZD, and has adopted the different modes of connection to come indicating operating status.Similar with electric Wiring protection device 300, voltage difference detection circuits 660 is electrical isolation with signal processing circuit 670.In addition, electric Wiring protection device 600 also comprises rectifier bridge BD.Solenoid SOL two ends are connected respectively to phase conductor 610 and rectifier bridge BD, are that signal processing circuit 670 provides power supply by rectifier bridge BD.In this embodiment, voltage difference detection circuits 660 is connected to the elementary of optocoupler IC2, and signal processing circuit 670 is connected to the secondary of optocoupler IC2.The voltage difference detection signal of voltage difference detection circuits 660 outputs is coupled to controllable silicon through optocoupler IC2.When the voltage difference between ground wire conductor 630 and the zero line conductor 620 during greater than predetermined value; The elementary conducting of optocoupler IC2; Thereby make secondary also conducting; Current flowing resistance R7, R8, thus the control utmost point of a positive level signal to thyristor Q1, the thyristor Q1 thereby the conducting that is triggered exported.
When thyristor Q1 conducting, will flow through big electric current, thereby cause and correspondingly flow through big electric current on the solenoid SOL, this big current signal is drive signal.Exciting bank 680 is coupled to signal drive circuit 670, is configured to order about said switching device 640 in response to this drive signal and is in the said second place.That is the position all broken off of switch 641,642,643, thereby cut off being electrically connected between electric Wiring protection device 600 input sides and the outlet side, guaranteed electrical safety.
In the electricity Wiring protection device 600, when when input side incoming transport power supply, switching device 640 are in primary importance and circuit operate as normal, LED 1 energising is shinny, with the indication normal operating conditions.Gnd conductor 630 wiring just often, LED 2 energising is shinny, and is normal with the wiring of indication ground wire.
Those skilled in the art will be understood that the foregoing description all is exemplary and nonrestrictive.The different technologies characteristic that in different embodiment, occurs can make up, to obtain beneficial effect.Those skilled in the art will be understood that and realize the embodiment of other variations of the embodiment that disclosed on the basis of research accompanying drawing, specification and claims.In claims, term " comprises " does not get rid of other devices or step; Indefinite article " one " is not got rid of a plurality of; Term " first ", " second " are used to indicate title but not are used to represent any specific order.Any Reference numeral in the claim all should not be understood that the restriction to protection range.Some technical characterictic appears in the different dependent claims and does not mean that and can not these technical characterictics be made up to obtain beneficial effect.This patent covers literal all methods, device and the product of going up or fall in doctrine of equivalents the scope of accompanying claims.
Claims (7)
1. an electric Wiring protection device is characterized in that, comprising:
Phase conductor (110), zero line conductor (120), gnd conductor (130);
Switching device (140) makes said phase conductor, zero line conductor, gnd conductor be in conducting state when being configured to be in primary importance, and makes said phase conductor, zero line conductor, gnd conductor be in off state when being in the second place;
Residual current testing circuit (150) is configured to detect the residual current of said phase conductor and zero line conductor;
Voltage difference detection circuits (160) is configured to detect the voltage difference between said gnd conductor and the zero line conductor;
Signal processing circuit (170) is coupled to said residual current testing circuit, voltage difference detection circuits, is configured at least one of the predetermined error conditions in response to residual current detection signal and voltage difference detection signal and produces drive signal;
Exciting bank (180) is coupled to said signal drive circuit, is configured to order about said switching device in response to said drive signal and is in the said second place.
2. electric Wiring protection device according to claim 1; It is characterized in that; Said residual current testing circuit comprises a current transformer, and said phase conductor and zero line conductor are first elementary as this current transformer, and this current transformer secondary is coupled to said signal processing circuit; The input of said voltage difference detection circuits is connected respectively to said gnd conductor and said zero line conductor.
3. electric Wiring protection device according to claim 2 is characterized in that, the second elementary of said current transformer is coupled in the output of said voltage difference detection circuits, thereby is coupled to said signal processing circuit.
4. electric Wiring protection device according to claim 2 is characterized in that said zero line conductor is connected to the ground of said electric Wiring protection device, and said voltage difference detection circuits is connected respectively to the ground of said gnd conductor and said electric Wiring protection device.
5. electric Wiring protection device according to claim 2 is characterized in that said signal processing circuit comprises thyristor, and the output of said voltage difference detection circuits is directly coupled to the control utmost point of said thyristor.
6. electric Wiring protection device according to claim 2 is characterized in that, the output of said voltage difference detection circuits is coupled to said signal processing circuit through an optic coupling element.
7. electric Wiring protection device according to claim 6 is characterized in that, said voltage difference detection circuits comprises a bidirectional diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203413582U CN202268696U (en) | 2011-09-13 | 2011-09-13 | Electric wiring protection device for detecting power supply false wiring condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203413582U CN202268696U (en) | 2011-09-13 | 2011-09-13 | Electric wiring protection device for detecting power supply false wiring condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268696U true CN202268696U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203413582U Expired - Lifetime CN202268696U (en) | 2011-09-13 | 2011-09-13 | Electric wiring protection device for detecting power supply false wiring condition |
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| Country | Link |
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| CN (1) | CN202268696U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001174A (en) * | 2011-09-13 | 2013-03-27 | 苏州益而益电器制造有限公司 | Electrical wiring protection device capable of detecting false power supply wiring condition |
| CN104034991A (en) * | 2013-03-04 | 2014-09-10 | 益而益(集团)有限公司 | Ground fault detection and resetting apparatus |
| CN104993332A (en) * | 2015-08-04 | 2015-10-21 | 温州骋航电器有限公司 | Miniature electric leakage protection socket |
| CN107843806A (en) * | 2017-10-30 | 2018-03-27 | 阳光电源股份有限公司 | A kind of Wiring detection method, device and photovoltaic generating system |
| CN107872054A (en) * | 2016-09-26 | 2018-04-03 | 宏正自动科技股份有限公司 | System and device for preventing error connection of power over Ethernet and power over cable |
-
2011
- 2011-09-13 CN CN2011203413582U patent/CN202268696U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001174A (en) * | 2011-09-13 | 2013-03-27 | 苏州益而益电器制造有限公司 | Electrical wiring protection device capable of detecting false power supply wiring condition |
| CN103001174B (en) * | 2011-09-13 | 2015-09-09 | 苏州益而益电器制造有限公司 | Detect the electric Wiring protection device of power supply false wiring condition |
| CN104034991A (en) * | 2013-03-04 | 2014-09-10 | 益而益(集团)有限公司 | Ground fault detection and resetting apparatus |
| CN104993332A (en) * | 2015-08-04 | 2015-10-21 | 温州骋航电器有限公司 | Miniature electric leakage protection socket |
| CN107872054A (en) * | 2016-09-26 | 2018-04-03 | 宏正自动科技股份有限公司 | System and device for preventing error connection of power over Ethernet and power over cable |
| CN107872054B (en) * | 2016-09-26 | 2019-10-25 | 宏正自动科技股份有限公司 | System and device for preventing error connection of power over Ethernet and power over cable |
| CN107843806A (en) * | 2017-10-30 | 2018-03-27 | 阳光电源股份有限公司 | A kind of Wiring detection method, device and photovoltaic generating system |
| CN107843806B (en) * | 2017-10-30 | 2020-08-28 | 阳光电源股份有限公司 | Wiring detection method and device and photovoltaic power generation system |
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