CN104934932B - A kind of intelligent DC detection of electrical leakage and surge protective device - Google Patents
A kind of intelligent DC detection of electrical leakage and surge protective device Download PDFInfo
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- CN104934932B CN104934932B CN201510342603.4A CN201510342603A CN104934932B CN 104934932 B CN104934932 B CN 104934932B CN 201510342603 A CN201510342603 A CN 201510342603A CN 104934932 B CN104934932 B CN 104934932B
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Abstract
The present invention proposes a kind of intelligent DC detection of electrical leakage and surge protective device, including sampling spike filtering circuit, detection of electrical leakage disconnecting circuit, power supply circuit, surge harmonic absorbing circuit and current rectifying and wave filtering circuit；Sampling spike filtering circuit is connected with input power, for being filtered to input power sampling and spike, detection of electrical leakage disconnecting circuit with sampling spike filtering circuit be connected, for detection of electrical leakage and leak electricity when disconnecting circuit, power supply circuit is connected with detection of electrical leakage disconnecting circuit, for powering, surge harmonic absorbing circuit is connected with sampling spike filtering circuit and detection of electrical leakage disconnecting circuit, absorbed for surge harmonic respectively, and current rectifying and wave filtering circuit is connected with detection of electrical leakage disconnecting circuit, for rectifying and wave-filtering；Intelligent DC detection of electrical leakage and surge protective device are placed in shell and are inoculated with marine glue.Implement the intelligent DC detection of electrical leakage and surge protective device of the present invention, have the advantages that：Circuit configurations are relatively simple, with water-proof function, do not allow it is fragile.
Description
Technical field
The present invention relates to LED driving protections field, more particularly to a kind of intelligent DC detection of electrical leakage and surge protective device.
Background technology
Existing high voltage drive LED lamp, it is typically all plug-in if to realize detection of electrical leakage open circuit and surge absoption
RCCB, and plug-in surge absorbing circuit, thus can there are the following problems：Circuit configurations complexity trouble, no waterproof
Function, easily causes damage, misoperation.Also be exactly without detection of electrical leakage open circuit and surge absoption function, thus can
Cause to lack protection, it is easy to directly burn out sliver road lighting lantern.
The content of the invention
The technical problem to be solved in the present invention is that the above-mentioned circuit configurations complexity for prior art is bothered, without waterproof
Function, the defect being easily damaged there is provided a kind of circuit configurations it is relatively simple, with water-proof function, do not allow flimsy intelligence straight
Flow detection of electrical leakage and surge protective device.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of intelligent DC detection of electrical leakage and surge
Protection device, including sampling spike filtering circuit, detection of electrical leakage disconnecting circuit, power supply circuit, surge harmonic absorbing circuit and whole
Flow filter circuit；The sampling spike filtering circuit is connected with input power, for being sampled to the input power and sharp
Peak is filtered, and the detection of electrical leakage disconnecting circuit is connected with the sampling spike filtering circuit, for carrying out detection of electrical leakage and in hair
Disconnecting circuit during raw electric leakage, the power supply circuit is connected, for powering with the detection of electrical leakage disconnecting circuit, the surge harmonic wave
Absorbing circuit is connected with the sampling spike filtering circuit and detection of electrical leakage disconnecting circuit, for carrying out surge absoption harmony respectively
Ripple absorbs protection, and the current rectifying and wave filtering circuit is connected with the detection of electrical leakage disconnecting circuit, for driving LED works after rectifying and wave-filtering
Make；The intelligent DC detection of electrical leakage and surge protective device are placed in shell and are inoculated with marine glue.
In intelligent DC detection of electrical leakage of the present invention and surge protective device, the sampling spike filtering circuit bag
Include current detecting transformer, the 5th resistance, the 6th resistance and the second electric capacity, the live wire and zero line of input power respectively with the electricity
Two inputs connection of stream detection transformer, second electric capacity and the 6th resistor coupled in parallel, its one end in parallel passes through described
5th resistance is connected with an output end of the current detecting transformer, and the other end in parallel disconnects electricity with the detection of electrical leakage
Road is connected.
In intelligent DC detection of electrical leakage of the present invention and surge protective device, the detection of electrical leakage disconnecting circuit bag
Include detection of electrical leakage chip and disconnecting circuit, the disconnecting circuit includes controllable silicon and relay, the relay include coil and
Contact sets, the 5th pin of the detection of electrical leakage chip is connected with one end of second electric capacity and the 6th resistor coupled in parallel, described
6th pin of detection of electrical leakage chip is connected with the other end of second electric capacity and the 6th resistor coupled in parallel, the detection of electrical leakage core
4th pin of piece is connected with another output end of the current detecting transformer, the anode of the controllable silicon and the coil
One end connection, the control pole of the controllable silicon is connected with the first pin of the detection of electrical leakage chip, the moon of the controllable silicon
Pole is grounded, and the negative electrode of the controllable silicon is also connected with the power supply circuit, and the other end of the coil connects with the power supply circuit
Connect, one end of the contact sets is connected with the surge harmonic absorbing circuit, the other end of the contact sets is filtered with the rectification
Wave circuit is connected.
In intelligent DC detection of electrical leakage of the present invention and surge protective device, the surge harmonic absorbing circuit bag
Include the first piezo-resistance, the second piezo-resistance, the 3rd piezo-resistance, the 4th piezo-resistance, first gas discharge tube, second gas
Discharge tube, filter capacitor and common mode inductance, one end of first piezo-resistance one end respectively with the 3rd piezo-resistance,
The input connection of one end of filter capacitor and common mode inductance, the other end of first piezo-resistance is respectively with described first
One end of gas-discharge tube and the connection of one end of the second piezo-resistance, the other end and second gas of the 3rd piezo-resistance
One end connection of body discharge tube, the other end of second piezo-resistance other end respectively with the second gas discharge tube,
The other end of filter capacitor, another input of common mode inductance and zero line connection, two output ends of the common mode inductance
The two ends with the 4th piezo-resistance are connected respectively, the two ends of the 4th piezo-resistance also respectively with the contact sets
Two contact portions, the two ends of the 4th piezo-resistance are also connected with the live wire and zero line respectively.
In intelligent DC detection of electrical leakage of the present invention and surge protective device, the current rectifying and wave filtering circuit includes the
One bridge rectifier and the first electric capacity, the first pin and the 3rd pin of first bridge rectifier are touched with described respectively
The another two contact portion of point group, the second pin of first bridge rectifier is connected with one end of first electric capacity,
The other end ground connection of first electric capacity, the anode of one end of first electric capacity also with the LED is connected, first electric capacity
Negative electrode of the other end also with the LED be connected.
In intelligent DC detection of electrical leakage of the present invention and surge protective device, the intelligent DC detection of electrical leakage and
Surge protective device also includes fuse, and one end of the fuse is connected with the live wire, the other end of the fuse and
One end connection of first piezo-resistance.
In intelligent DC detection of electrical leakage of the present invention and surge protective device, the power supply circuit includes the second bridge
Formula rectification circuit, first resistor, second resistance, the 3rd electric capacity and the 4th electric capacity, the first of second bridge rectifier draws
Pin is connected with the live wire, and the 3rd pin of second bridge rectifier is connected with the zero line, and second bridge-type is whole
The second pin of current circuit passes sequentially through the 3rd pin with the detection of electrical leakage chip after the second resistance and first resistor
Connection, the other end of the second pin of second bridge rectifier also with the coil is connected, second bridge rectifier
The 4th pin ground connection of circuit, one end of the 3rd electric capacity is connected with the 3rd pin of the detection of electrical leakage chip, and described the
The other end of three electric capacity is connected by the 4th electric capacity with the first pin of the detection of electrical leakage chip.
Implement the intelligent DC detection of electrical leakage and surge protective device of the present invention, have the advantages that：Due to that will take
Sample spike filtering circuit, detection of electrical leakage disconnecting circuit, power supply circuit, surge harmonic absorbing circuit and current rectifying and wave filtering circuit make one
Individual module, can thus reduce the complexity of circuit configurations, simultaneously because intelligent DC detection of electrical leakage and surge protective device are put
Put in shell and be inoculated with marine glue, can thus reduce with waterproof and cause to damage the probability with misoperation, so its circuit
Construction it is relatively simple, with water-proof function, do not allow it is fragile.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation in intelligent DC detection of electrical leakage of the present invention and surge protective device one embodiment；
Fig. 2 is intelligent DC detection of electrical leakage and the test schematic diagram of surge protective device in the embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
In intelligent DC detection of electrical leakage of the present invention and surge protective device embodiment, its intelligent DC detection of electrical leakage and wave
The structural representation for gushing protection device is as shown in Figure 1.In Fig. 1, the device includes sampling spike filtering circuit 11, detection of electrical leakage and broken
Open circuit (rear extended meeting is described), power supply circuit 12, surge harmonic absorbing circuit 13 and current rectifying and wave filtering circuit 14；Wherein, take
Sample spike filtering circuit 11 is connected with input power, for being sampled to input power and spike filtering, and detection of electrical leakage disconnects
Circuit is connected with sampling spike filtering circuit, for carrying out detection of electrical leakage and the disconnecting circuit when leaking electricity, and is played protection and is made
With power supply circuit 12 is connected with detection of electrical leakage disconnecting circuit, for powering, and surge harmonic absorbing circuit 13 is respectively with sampling spike
Filtering circuit 11 and detection of electrical leakage disconnecting circuit connect, absorb protection, current rectifying and wave filtering circuit for carrying out surge absoption harmonic
14 are connected with detection of electrical leakage disconnecting circuit, for driving the work of LED (not shown)s after rectifying and wave-filtering；The intelligent DC leaks electricity
Detection and surge protective device are placed in shell and are inoculated with marine glue, specifically, inputting, exporting direct bonding wire extraction, test
After function is normal, whole mould (intelligent DC detection of electrical leakage and surge protective device) is placed in plastics power pack, and encapsulating is fixed
Complete whole product.Inhaled due to spike filtering circuit 11, detection of electrical leakage disconnecting circuit, power supply circuit 12, surge harmonic wave will be sampled
Receive circuit 13 and current rectifying and wave filtering circuit 14 makes a module, the complexity of circuit configurations can be thus reduced, simultaneously because intelligence
The detection of energy DC leakage and surge protective device are placed in shell and are inoculated with marine glue, can thus be reduced and made with waterproof
Into damage and misoperation probability, so its circuit configurations it is relatively simple, with water-proof function, do not allow it is fragile, its can through
Play wind thunder and lightning wet by the rain and burnt by the sun.
In the present embodiment, input power input 220V single-phase three-wires, respectively live wire L1, zero line N1 and ground wire.This reality
Apply in example, sampling spike filtering circuit 11 includes current detecting transformer L, the 5th resistance RR5, the electricity of the 6th resistance RR6 and second
Hold CC2, the live wire L1 and zero line N1 of input power are connected with current detecting transformer L two inputs respectively, the second electric capacity
CC2 and the 6th resistance RR6 is in parallel, the output end that its one end in parallel passes through the 5th resistance RR5 and current detecting transformer L
(current detecting transformer L the 6th pin) is connected, and the other end in parallel is connected with detection of electrical leakage disconnecting circuit.Sample spike mistake
Filter circuit 11 is realized samples to the electric current of input power, and is filled into spike.
In the present embodiment, detection of electrical leakage disconnecting circuit includes detection of electrical leakage chip U and disconnecting circuit 15, and disconnecting circuit 15 is wrapped
Controllable silicon SCR and relay KJ1 are included, relay KJ1 includes coil LY2N-J and contact sets, and the 5th of detection of electrical leakage chip U draws
Pin and above-mentioned second electric capacity CC2 and the 6th resistance RR6 one end in parallel be connecteds, the 6th pin of detection of electrical leakage chip and above-mentioned the
Other end connection in parallel two electric capacity CC2 and the 6th resistance RR6, detection of electrical leakage chip U the 4th pin and current detecting mutual inductance
Device L another output end (current detecting transformer L the 5th pin) connection, anode and the coil LY2N-J of controllable silicon SCR
One end connection, the control pole of controllable silicon SCR is connected with detection of electrical leakage chip U the first pin, and the negative electrode of controllable silicon SCR connects
Ground, the negative electrode of controllable silicon SCR is also connected with power supply circuit 12, and the coil LY2N-J other end is connected with power supply circuit 12, contact
One end of group is connected with surge harmonic absorbing circuit 13, and the other end of contact sets is connected with current rectifying and wave filtering circuit 14.
Live wire L1, zero line N1 pass through the current detecting transformer L of 500 times of hollow, by the 5th resistance RR5, the 6th resistance
RR6 and the second electric capacity CC2 samplings and spike filtering, are input to detection of electrical leakage chip U (earth fault special chip)；When electric leakage inspection
When survey chip U has detected electric leakage, the disconnecting circuit of disconnecting circuit 15 is controlled.So it is achieved that creepage protection function.
In the present embodiment, surge harmonic absorbing circuit 13 includes the first piezo-resistance VR1, the second piezo-resistance VR2, the 3rd
Piezo-resistance VR3, the 4th piezo-resistance VR4, first gas discharge tube VO1, second gas discharge tube VO2, filter capacitor CX1 and
One end, the filter capacitor CX1 one end of common mode inductance L2, the first piezo-resistance VR1 one end respectively with the 3rd piezo-resistance VR3
Connected with a common mode inductance L2 input, the first piezo-resistance VR1 other end respectively with first gas discharge tube VO1 one
End and the second piezo-resistance VR2 one end are connected, the 3rd piezo-resistance VR3 other end and the one of second gas discharge tube VO2
End connection, the second piezo-resistance VR2 other end other end respectively with second gas discharge tube VO2, filter capacitor CX1 it is another
One end, common mode inductance L2 another input and zero line N2 connections, common mode inductance L2 two output ends are pressure-sensitive with the 4th respectively
Also pressed respectively with two contact portions in contact sets, the 4th at resistance VR4 two ends connection, the 4th piezo-resistance VR4 two ends
Quick resistance VR4 two ends are also connected with live wire L1 and zero line N1 respectively.The surge harmonic absorbing circuit 13 realizes surge, harmonic wave
Absorb defencive function.
In the present embodiment, current rectifying and wave filtering circuit 14 includes the first bridge rectifier DB1 and the first electric capacity CC1, the first bridge
The another two contact portion of formula rectification circuit DB1 the first pin and the 3rd pin respectively with contact sets, the first bridge rectifier electricity
Road DB1 second pin is connected with the first electric capacity CC1 one end, the first electric capacity CC1 other end ground connection, the first electric capacity CC1's
One end is also connected with LED anode, and the first electric capacity CC1 other end is also connected with LED negative electrode.Namely the first electric capacity CC1
One end be connected with OUT+, the first electric capacity CC1 other end is connected with OUT-, and OUT+ is also connected with LED anode, OUT- with
LED negative electrode connection, that is, turned directly by exchange equivalent to the first bridge rectifier DB1 and the first electric capacity CC1 composition power supplys
Stream and filtering, then power supply drive LED operation.
In the present embodiment, intelligent DC detection of electrical leakage and surge protective device also include fuse F1, the one of fuse F1
End is connected with live wire L1, and the fuse L1 other end is connected with the first piezo-resistance VR1 one end.Fuse F1 plays circuit guarantor
Shield is acted on.
In the present embodiment, power supply circuit 12 include the second bridge rectifier DB2, first resistor RR1, second resistance RR2,
3rd electric capacity CC3 and the 4th electric capacity CC4, the second bridge rectifier DB2 the first pin is connected with live wire L1, and the second bridge-type is whole
Current circuit DB2 the 3rd pin is connected with zero line N1, and the second bridge rectifier DB2 second pin passes sequentially through second resistance
The 3rd pin after RR2 and first resistor RR1 with detection of electrical leakage chip U is connected, the second bridge rectifier DB2 second pin
The other end also with coil LY2N-J is connected, the second bridge rectifier DB2 the 4th pin ground connection, the one of the 3rd electric capacity CC3
End is connected with detection of electrical leakage chip U the 3rd pin, and the 3rd electric capacity CC3 other end passes through the 4th electric capacity CC4 and detection of electrical leakage
Chip U the first pin connection.Power supply circuit 12 is used to power in whole circuit.The intelligent DC detection of electrical leakage and surge are protected
The element of each in protection unit is identical with conventional PCBA manufacture component technologies from conventional criteria encapsulation paster, plug-in unit.Fig. 2 is this
Intelligent DC detection of electrical leakage and the test schematic diagram of surge protective device in embodiment.
Certainly, under the certain situation of the present embodiment, in the case where requiring less high, the intelligent DC detection of electrical leakage and
Surge protective device can also be completed using discrete multimode, or also can select other similar functions elements to complete；
But at this moment connecting line is more complicated.
In a word, in the present embodiment, the intelligent DC detection of electrical leakage and surge protective device are collection surge, harmonic wave, electric leakage
Multiple function is disconnected in the module of one, and one whole parts of overall encapsulating waterproof formation improve the efficiency of whole light fixture group
And reliability, simultaneously because it is integrated on one module, its reduce volume while, also reduce cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (4)
1. a kind of intelligent DC detection of electrical leakage and surge protective device, it is characterised in that including sampling spike filtering circuit, electric leakage
Detect disconnecting circuit, power supply circuit, surge harmonic absorbing circuit and current rectifying and wave filtering circuit；It is described sampling spike filtering circuit with it is defeated
Enter power supply connection, for being sampled to the input power and spike filtering, the detection of electrical leakage disconnecting circuit takes with described
The connection of sample spike filtering circuit, for carrying out detection of electrical leakage and the disconnecting circuit when leaking electricity, the power supply circuit with it is described
Detection of electrical leakage disconnecting circuit is connected, for powering, and the surge harmonic absorbing circuit samples spike filtering circuit with described respectively
With detection of electrical leakage disconnecting circuit connection, for carry out surge absoption harmonic absorb protection, the current rectifying and wave filtering circuit with it is described
Detection of electrical leakage disconnecting circuit is connected, for driving LED operation after rectifying and wave-filtering；The intelligent DC detection of electrical leakage and surge protection
Device is placed in shell and is inoculated with marine glue；
The sampling spike filtering circuit includes current detecting transformer, the 5th resistance, the 6th resistance and the second electric capacity, input electricity
The live wire and zero line in source are connected with two inputs of the current detecting transformer respectively, second electric capacity and the 6th resistance
Parallel connection, its one end in parallel is connected by the 5th resistance with an output end of the current detecting transformer, in parallel
The other end is connected with the detection of electrical leakage disconnecting circuit；
The detection of electrical leakage disconnecting circuit include detection of electrical leakage chip and disconnecting circuit, the disconnecting circuit include controllable silicon and after
Electrical equipment, the relay includes coil and contact sets, the 5th pin of the detection of electrical leakage chip and second electric capacity and the
One end connection of six resistor coupled in parallel, the 6th pin of the detection of electrical leakage chip and second electric capacity and the 6th resistor coupled in parallel
The other end is connected, and the 4th pin of the detection of electrical leakage chip is connected with another output end of the current detecting transformer,
The anode of the controllable silicon is connected with one end of the coil, and the of the control pole of the controllable silicon and the detection of electrical leakage chip
One pin is connected, and the minus earth of the controllable silicon, the negative electrode of the controllable silicon is also connected with the power supply circuit, the coil
The other end be connected with the power supply circuit, one end of the contact sets is connected with the surge harmonic absorbing circuit, it is described touch
The other end of point group is connected with the current rectifying and wave filtering circuit；
The surge harmonic absorbing circuit includes the first piezo-resistance, the second piezo-resistance, the 3rd piezo-resistance, the 4th pressure-sensitive electricity
Resistance, first gas discharge tube, second gas discharge tube, filter capacitor and common mode inductance, one end point of first piezo-resistance
An input not with one end, one end of filter capacitor and common mode inductance of the 3rd piezo-resistance is connected, first pressure
The other end of quick resistance is connected with one end of the first gas discharge tube and one end of the second piezo-resistance respectively, and the described 3rd
The other end of piezo-resistance is connected with one end of the second gas discharge tube, the other end of second piezo-resistance respectively with
The other end, the other end of filter capacitor, another input of common mode inductance and the zero line of the second gas discharge tube connect
Connect, the two ends of two output ends of the common mode inductance respectively with the 4th piezo-resistance are connected, the 4th piezo-resistance
Two ends also respectively with two contact portions in the contact sets, the two ends of the 4th piezo-resistance also respectively with the fire
Line and zero line connection.
2. intelligent DC detection of electrical leakage according to claim 1 and surge protective device, it is characterised in that the rectification filter
Wave circuit includes the first bridge rectifier and the first electric capacity, the first pin and the 3rd pin of first bridge rectifier
Respectively with the another two contact portion of the contact sets, the second pin of first bridge rectifier and first electric capacity
One end connection, the other end ground connection of first electric capacity, the anode of one end of first electric capacity also with the LED is connected,
Negative electrode of the other end of first electric capacity also with the LED is connected.
3. intelligent DC detection of electrical leakage according to claim 2 and surge protective device, it is characterised in that the intelligence is straight
Flowing detection of electrical leakage and surge protective device also includes fuse, and one end of the fuse is connected with the live wire, the insurance
The other end of silk is connected with one end of first piezo-resistance.
4. intelligent DC detection of electrical leakage according to claim 3 and surge protective device, it is characterised in that the power supply electricity
Road includes the second bridge rectifier, first resistor, second resistance, the 3rd electric capacity and the 4th electric capacity, second bridge rectifier
First pin of circuit is connected with the live wire, and the 3rd pin of second bridge rectifier is connected with the zero line, institute
State the second bridge rectifier second pin pass sequentially through after the second resistance and first resistor with the detection of electrical leakage core
The 3rd pin connection of piece, the other end of the second pin of second bridge rectifier also with the coil is connected, described
The 4th pin ground connection of second bridge rectifier, one end of the 3rd electric capacity and the 3rd pin of the detection of electrical leakage chip
Connection, the other end of the 3rd electric capacity is connected by the 4th electric capacity with the first pin of the detection of electrical leakage chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342603.4A CN104934932B (en) | 2015-06-17 | 2015-06-17 | A kind of intelligent DC detection of electrical leakage and surge protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342603.4A CN104934932B (en) | 2015-06-17 | 2015-06-17 | A kind of intelligent DC detection of electrical leakage and surge protective device |
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| Publication Number | Publication Date |
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| CN104934932A CN104934932A (en) | 2015-09-23 |
| CN104934932B true CN104934932B (en) | 2017-10-31 |
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| CN201510342603.4A Expired - Fee Related CN104934932B (en) | 2015-06-17 | 2015-06-17 | A kind of intelligent DC detection of electrical leakage and surge protective device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107306027B (en) * | 2016-04-18 | 2021-01-26 | 中兴通讯股份有限公司 | Switching power supply's lightning protection device and switching power supply |
| CN109193600A (en) * | 2018-09-19 | 2019-01-11 | 惠州市华阳光电技术有限公司 | A kind of lower Line To Line lightning protection circuit of clamp voltage |
| CN111007436A (en) * | 2019-12-27 | 2020-04-14 | 广东电科院能源技术有限责任公司 | Electric leakage detection device |
| CN114244092A (en) * | 2021-12-23 | 2022-03-25 | 深圳市普德新星电源技术有限公司 | High-efficiency safety capacitor discharge circuit and implementation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159076Y (en) * | 1992-05-14 | 1994-03-16 | 柯建东 | Multifunction leakage break protector |
| CN201975752U (en) * | 2011-01-24 | 2011-09-14 | 中山市开普电器有限公司 | Leakage protector |
| CN202905642U (en) * | 2012-10-29 | 2013-04-24 | 山东开泰石化股份有限公司 | Lightning protection leakage circuit breaker |
-
2015
- 2015-06-17 CN CN201510342603.4A patent/CN104934932B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159076Y (en) * | 1992-05-14 | 1994-03-16 | 柯建东 | Multifunction leakage break protector |
| CN201975752U (en) * | 2011-01-24 | 2011-09-14 | 中山市开普电器有限公司 | Leakage protector |
| CN202905642U (en) * | 2012-10-29 | 2013-04-24 | 山东开泰石化股份有限公司 | Lightning protection leakage circuit breaker |
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| CN104934932A (en) | 2015-09-23 |
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