CN205583646U - Earth leakage protection wall switch - Google Patents

Earth leakage protection wall switch Download PDF

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Publication number
CN205583646U
CN205583646U CN201620412770.1U CN201620412770U CN205583646U CN 205583646 U CN205583646 U CN 205583646U CN 201620412770 U CN201620412770 U CN 201620412770U CN 205583646 U CN205583646 U CN 205583646U
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CN
China
Prior art keywords
resistance
circuit
diode
earth leakage
current
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Expired - Fee Related
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CN201620412770.1U
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Chinese (zh)
Inventor
季建丰
唐锡臣
张剑彬
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GUANGZHOU BODA ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd
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GUANGZHOU BODA ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN201620412770.1U priority Critical patent/CN205583646U/en
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Publication of CN205583646U publication Critical patent/CN205583646U/en
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Abstract

The utility model discloses an earth leakage protection wall switch, the power supply circuit of the intelligent interactive terminal comprises a power supply end, piezo -resistor, the reset key, the dropout return circuit, prevent electric wall circuit, overvoltage crowbar, leak current protection circuit, over -current protection circuit and test circuit, piezo -resistor's both ends and live wire and zero line are connected, the both ends and the piezo -resistor of reset key are connected, be used for switch -on or disconnection return circuit, the dropout return circuit is used for in the overvoltage, cross the circuit, deenergization end when leakage current or electrification of ground wire, overvoltage protection when being used for the overtension between live wire and zero line, overvoltage crowbar carries out, it carries out the leakage current protection to leak when current protection circuit is used for taking place the leakage current, the over -current protection circuit is passed by the live wire, over -current protection is used for carrying on when the electric current is too big, whether test circuit is used for testing earth leakage protection wall switch and can normally works. Implement the utility model discloses, following beneficial effect has: have the electrical protection function, can cut off the power supply when the human body electrocutes, save the electric energy, can prolong the life of electrical apparatus.

Description

A kind of earth leakage protective switch on wall
Technical field
This utility model relates to switch on wall field, particularly to a kind of earth leakage protective switch on wall.
Background technology
Switch on wall is electronic devices and components common in daily life, and the life with people is inseparable.But Existing switch on wall is only to provide electrical equipment to access and turn on disconnection switching and is used, and lacks the electic protection of necessity, There is potential safety hazard.Traditional switch on wall is exactly a plug-in strip, does not has stream, overvoltage and residual current protection Function, so will result in human body and easily gets an electric shock, once produce leakage current, will produce unnecessary power consumption, Thus can consume electric energy, cause unnecessary waste, electrical equipment will be burnt out when overvoltage, reduce electrical equipment Service life.If run into short circuit, leak electricity, cross stream, ground wire electrification or ground wire be when disconnecting, be easily damaged User is also caused personal injury by load, the most easily causes electrical fire, causes any property loss.
Utility model content
The technical problems to be solved in the utility model is, above-mentioned for prior art does not has electic protection merit Can, human body easily gets an electric shock, wastes electric energy, reduces the defect in electrical equipment service life, it is provided that one has electrically Defencive function, can the power-off when human electric shock, save electric energy, can extend electrical equipment service life electric leakage protect Revetment wall switch.
This utility model solves its technical problem and be the technical scheme is that a kind of earth leakage protective wall of structure Switch, including power end, varistor, reset key, dropout loop, anti-electricity wall circuit, overvoltage protection electricity Road, leakage current protection circuit, circuit overcurrent protection and test circuit, described power end input AC electricity, The two ends of described varistor are connected with live wire and the zero line of described alternating current respectively, the two ends of described reset key Two ends with described varistor are connected, are used for being switched on or switched off loop respectively, and described dropout loop is with described Reset key connects, for disconnecting described electricity in the case of overvoltage, oversampling circuit, leakage current or ground wire electrification Source, described anti-electricity wall circuit is connected with described dropout loop and reset key respectively, described overvoltage crowbar It is connected with described dropout loop and anti-electricity wall circuit respectively, for the voltage mistake between described live wire and zero line Carry out overvoltage protection time high, described leakage current protection circuit be connected with described dropout loop and by described live wire and Zero line passes, for there is leakage current time carry out residual current protection, described circuit overcurrent protection respectively with institute State dropout loop and leakage current protection circuit connects, and passed by described live wire, for entering when current is excessive Row overcurrent protection, one end of described test circuit is connected with described zero line, and the other end is protected with described leakage current Protection circuit connects, and is used for testing whether described earth leakage protective switch on wall can normally work.
In earth leakage protective switch on wall described in the utility model, described dropout loop include tripping coil, Controllable silicon, the first filter capacitor, the 6th resistance and earth leakage protective control chip, one end of described tripping coil Being connected with described live wire, for driving described reset key to disconnect when there is leakage current, carrying out residual current protection, The other end of described tripping coil is connected with described silicon controlled anode, and described silicon controlled anode is also by institute Stating the 6th resistance to be connected with the 5th pin of described earth leakage protective control chip, described silicon controlled controls pole and divides It is not connected with one end of described first filter capacitor and the 7th pin of earth leakage protective control chip, described controlled The negative electrode of silicon respectively with described zero line, the other end of the first filter capacitor and the 6th of earth leakage protective control chip the Pin connects.
In earth leakage protective switch on wall described in the utility model, described anti-electricity wall circuit include the second resistance, Toggle switch, the 3rd resistance, the 4th resistance and the 3rd diode, one end of described second resistance and described fire Line connects, and the other end of described second resistance passes through described toggle switch ground connection, one end of described 3rd resistance, One end of 4th resistance and the anode of the 3rd diode connect, and the other end ground connection of described 3rd resistance is described The other end of the 4th resistance is connected with described zero line.
In earth leakage protective switch on wall described in the utility model, described overvoltage crowbar includes the one or two Pole pipe, the 5th resistance, the 8th diode, the 7th resistance, the second light emitting diode, the second electric capacity and the 4th Diode, the anode of described first diode is connected with described live wire, and the negative electrode of described first diode passes through Described 5th resistance is connected with described one end of 7th resistance and the anode of the 8th diode respectively, and the described 7th The other end of resistance is connected with described zero line by described second light emitting diode, the moon of described 8th diode Pole is connected with described zero line by described second electric capacity, and the negative electrode of described 8th diode is also by the described 4th Diode is connected with the 8th pin of earth leakage protective control chip, and the negative electrode of described 8th diode is also with described The negative electrode of the 3rd diode connects.
In earth leakage protective switch on wall described in the utility model, described leakage current protection circuit includes zero sequence Current transformer, the tenth resistance, the 5th electric capacity, the 11st resistance, the 7th electrochemical capacitor, the 6th electric capacity, 8th resistance, the 9th resistance, the 3rd electric capacity and the 4th electric capacity, described live wire and zero line both pass through described zero sequence Current transformer, one end of described tenth resistance and the parallel connection of the 5th electric capacity and the line of described zero sequence current mutual inductor One end of circle connects, and the other end in parallel is connected with the other end of the coil of described zero sequence current mutual inductor, institute The one end of the coil stating zero sequence current mutual inductor controls with one end of described 6th electric capacity, earth leakage protective the most respectively 3rd pin of chip and one end of the 4th electric capacity connect, the other end of the coil of described zero sequence current mutual inductor Pass sequentially through described 11st resistance and the 7th electric capacity respectively with the other end and the earth leakage protective of described 6th electric capacity Second pin of control chip connects, the of one end of described 3rd electric capacity and described earth leakage protective control chip Eight pins connect, and the first pin of described earth leakage protective control chip passes through described 8th resistance and the described 9th One end of resistance connects, the other end of described 3rd electric capacity, the other end of the 9th resistance, the 4th electric capacity another 4th pin of one end and earth leakage protective control chip is all connected with described zero line.
In earth leakage protective switch on wall described in the utility model, described circuit overcurrent protection includes electric current Transformer, the 15th resistance, the 16th resistance, the tenth electrochemical capacitor, the 6th diode, the 7th diode, 8th electrochemical capacitor, the 9th electrochemical capacitor, the 12nd resistance, the 13rd resistance, the 14th resistance, the 5th Diode and audion, described live wire passes described current transformer, described by the sensing of described current transformer The electric current of live wire, one end of described 15th resistance and the 16th resistor coupled in parallel and the line of described current transformer One end of circle connects, and the other end in parallel is connected with the other end of the coil of described current transformer, described electricity One end of the coil of current transformer also by described tenth electrochemical capacitor respectively with the anode of described 6th diode Connect with the negative electrode of the 7th diode, one end of described 5th diode and the 14th resistor coupled in parallel respectively with institute The positive pole stating the negative electrode of the 6th diode and the 9th electrochemical capacitor connects, and the other end in parallel is respectively with described the The positive pole of one end of 13 resistance and the 8th electrochemical capacitor connects, and the base stage of described audion is respectively with described the The other end of 13 resistance and one end of the 12nd resistance connect, the colelctor electrode of described audion and described electric leakage Stream protection circuit connects, the emitter stage of described audion, the other end of the 12nd resistance, the 8th electric capacity negative Pole, the negative pole of the 9th electric capacity, the 7th electric capacity the other end of coil of anode summation current transformer all with described Zero line connects.
In earth leakage protective switch on wall described in the utility model, described test circuit include the first resistance and Feeler switch, one end of described first resistance is connected with described zero line, and the other end of described first resistance is with described One end of feeler switch connects, after the other end of described feeler switch passes described zero sequence current mutual inductor by wire It is connected with described live wire.
In earth leakage protective switch on wall described in the utility model, described reset key is double-pole switch.
Implement earth leakage protective switch on wall of the present utility model, have the advantages that owing to being provided with pressure Quick resistance, reset key, dropout loop, anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, Circuit overcurrent protection and test circuit, varistor is used for shielding when overtension, reset key For being switched on or switched off loop, dropout loop is at overvoltage, oversampling circuit, leakage current or ground wire electrification In the case of deenergization end, overvoltage crowbar was carried out when overtension between live wire and zero line Pressure protection, leakage current protection circuit is used for occurring during leakage current carrying out residual current protection, circuit overcurrent protection For carrying out overcurrent protection when current is excessive, test circuit is used for whether testing earth leakage protective switch on wall Can normally work, thus its have electic protection function, can the power-off when human electric shock, save electric energy, energy Extend the service life of electrical equipment.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below by right In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below, Accompanying drawing in description is only embodiments more of the present utility model, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams in one embodiment of this utility model earth leakage protective switch on wall.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technical side in this utility model embodiment Case is clearly and completely described, it is clear that described embodiment is only that this utility model part is real Execute example rather than whole embodiments.Based on the embodiment in this utility model, ordinary skill people The every other embodiment that member is obtained under not making creative work premise, broadly falls into this utility model The scope of protection.
In this utility model earth leakage protective switch on wall embodiment, the circuit of this earth leakage protective switch on wall is former Reason figure is as shown in Figure 1.In Fig. 1, tripping coil TK, controllable silicon SCR, the first filter capacitor C1, Six resistance R6 and earth leakage protective control chip IC constitute dropout loop, the second resistance R2, toggle switch S, 3rd resistance R3, the 4th resistance R4 and the 3rd diode D3 composition anti-electricity wall circuit, the first diode D1, 5th resistance R5, the 8th diode D8, the 7th resistance R7, the second light emitting diode D2, the second electric capacity C2 and the 4th diode D2 constitute overvoltage crowbar, zero sequence current mutual inductor ZCT1, the tenth resistance R10, 5th electric capacity C5, the 11st resistance R11, the 7th electrochemical capacitor C7, the 6th electric capacity C6, the 8th resistance R8, 9th resistance R9, the 3rd electric capacity C3 and the 4th electric capacity C4 constitute leakage current protection circuit, current transformer ZCT2, the 15th resistance R15, the 16th resistance R16, the tenth electrochemical capacitor C10, the 6th diode D6, 7th diode D7, the 8th electrochemical capacitor C8, the 9th electrochemical capacitor C9, the 12nd resistance R12, the tenth Three resistance R13, the 14th resistance R14, the 5th diode D15 and audion V1 constitute overcurrent protection electricity Road, the first resistance R1 and feeler switch AJ constitute test circuit.
In the present embodiment, earth leakage protective switch on wall include power end, varistor MOV, reset key S1, Dropout loop, anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, circuit overcurrent protection and Test circuit, wherein, power end input 220V alternating current, its rated voltage is 230V, varistor MOV Two ends be connected with the live wire L and zero line N of alternating current respectively, varistor MOV is for working as overtension Time shield, two ends with varistor MOV respectively, the two ends of reset key S1 are connected, are used for connecting Or cutoff circuit, dropout loop is connected with reset key S1, on overvoltage, oversampling circuit, leakage current or ground Deenergization end in the case of tape electricity, anti-electricity wall circuit is connected with dropout loop and reset key S1 respectively, mistake Voltage protection circuit is connected with dropout loop and anti-electricity wall circuit, respectively between live wire L and zero line N Overvoltage protection is carried out, such as: when the voltage between live wire L and zero line N is more than 270V during overtension, Overvoltage crowbar opens over-voltage protecting function.
In the present embodiment, leakage current protection circuit is connected with dropout loop and passed by live wire L and zero line N, For when occur leakage current time carry out residual current protection, circuit overcurrent protection respectively with dropout loop and electric leakage Stream protection circuit connects, and is passed by live wire L, for carrying out overcurrent protection when current is excessive, the most just It is when electric current is more than the maximum set, firing current defencive function.One end of test circuit and zero line N Connecting, the other end is connected with leakage current protection circuit, and whether be used for testing earth leakage protective switch on wall can be normal Work.
In the present embodiment, owing to being provided with varistor MOV, reset key S1, dropout loop, anti-electricity wall electricity Road, overvoltage crowbar, leakage current protection circuit, circuit overcurrent protection and test circuit, varistor MOV is for shielding when overtension, and reset key S1 is used for being switched on or switched off loop, threads off back Road is for deenergization end, overvoltage protection in the case of overvoltage, oversampling circuit, leakage current or ground wire electrification Circuit is used for during the overtension between live wire L and zero line N carrying out overvoltage protection, leakage current protection circuit Carrying out residual current protection during for leakage current occurs, circuit overcurrent protection was for carrying out when current is excessive Current protection, test circuit is used for testing whether earth leakage protective switch on wall can normally work, so it has Electic protection function, can the power-off when human electric shock, save electric energy, service life of electrical equipment can be extended.
In the present embodiment, for dropout loop, one end of tripping coil TK is connected with live wire L, uses In driving reset key S1 to disconnect when there is leakage current, carry out residual current protection, in the present embodiment, reset key S1 is double-pole switch.The other end of tripping coil TK is connected with the anode of controllable silicon SCR, controllable silicon SCR Anode be connected also by the 5th pin of the 6th resistance R6 with earth leakage protective control chip IC, controllable silicon SCR Control pole respectively with the 7th pin of one end of the first filter capacitor C1 and earth leakage protective control chip IC even Connect, the negative electrode of controllable silicon SCR respectively with zero line N, the other end of the first filter capacitor C1 and earth leakage protective 6th pin of control chip IC connects.It is noted that in the present embodiment, the first filter capacitor C1 For filtering, anti-interference.Earth leakage protective control chip IC is low-power consumption two line control circuit of earth leakage, For the special IC of instant break-make earth leakage protective device, zero sequence current sensor ZCT1 sense two-wire (live wire L and zero line N) electric leakage signal, exports a high level by short time delay, thus drives controllable silicon SCR starts earth leakage protective.6th resistance R6 is the power input of earth leakage protective control chip IC.
In the present embodiment, for anti-electricity wall circuit, one end of the second resistance R2 is connected with live wire L, the The other end of two resistance R2 passes through toggle switch S ground connection, one end of the 3rd resistance R3, the 4th resistance R4 One end and the 3rd diode D3 anode connect, the other end ground connection of the 3rd resistance R3, the 4th resistance R4 The other end be connected with zero line N.
In the present embodiment, for overvoltage crowbar, the anode of the first diode D1 is connected with live wire L, The negative electrode of the first diode D1 by the 5th resistance R5 respectively with one end and the eight or two pole of the 7th resistance R7 The anode of pipe D8 connects, and the other end of the 7th resistance R7 is by the second light emitting diode D2 and zero line N even Connecing, the negative electrode of the 8th diode D8 is connected with zero line N by the second electric capacity C2, the 8th diode D8's Negative electrode is connected also by the 8th pin of the 4th diode D4 with earth leakage protective control chip C, the 8th diode The negative electrode of D8 also negative electrode with the 3rd diode D2 is connected.In the present embodiment, when live wire L and zero line N it Between voltage higher than set maximum voltage value time, overvoltage crowbar is switched on over-voltage protecting function.So Prevent from burning out electrical equipment (load), extend the service life of electrical equipment.
In the present embodiment, for leakage current protection circuit, live wire L and zero line N both passes through zero-sequence current Transformer ZCT1, zero sequence current mutual inductor ZCT1 for calculate two main lines (live wire L and zero line N) it Between difference between current the tenth resistance R10 and the 5th electric capacity C5 in parallel, the tenth resistance R10 and the 5th electric capacity C5 is also One end of connection is connected with one end of the coil of zero sequence current mutual inductor ZCT1, the tenth resistance R10 and the 5th electricity Holding the other end in parallel for C5 to be connected with the other end of the coil of zero sequence current mutual inductor ZCT1, zero-sequence current is mutual One end of the coil of sensor ZCT1 the most respectively with one end, the earth leakage protective control chip IC of the 6th electric capacity C6 The 3rd pin and the 4th electric capacity C4 one end connect, the other end of the coil of zero sequence current mutual inductor ZCT1 Pass sequentially through the 11st resistance R11 and the 7th electric capacity C7 other end and electric leakage respectively with the 6th electric capacity C6 to protect The second pin protecting control chip IC connects, and one end of the 3rd electric capacity C3 is with earth leakage protective control chip IC's 8th pin connects, and first pin of earth leakage protective control chip IC passes through the 8th resistance R8 and the 9th resistance One end of R9 connects, the other end of the 3rd electric capacity C3, the other end of the 9th resistance R9, the 4th electric capacity C4 The other end and the 4th pin of earth leakage protective control chip IC be all connected with zero line N.When there is leakage current, Leakage current protection circuit is switched on creepage protection function.Thus avoid the waste of unnecessary electric energy, joint Save electric energy.
In the present embodiment, for circuit overcurrent protection, live wire L passes current transformer ZCT2, by The electric current of current transformer ZCT2 sensing live wire L, the 15th resistance R15 and the 16th resistance R16 is in parallel One end be connected with one end of the coil of current transformer ZCT2, the other end in parallel and current transformer The other end of the coil of ZCT2 connects, and one end of the coil of current transformer ZCT2 is also by the tenth electrolysis electricity Hold C10 to be connected with the anode of the 6th diode D6 and the negative electrode of the 7th diode D7 respectively, the 5th diode D5 and the 14th resistance R14 one end in parallel respectively with negative electrode and the 9th electrochemical capacitor of the 6th diode D6 The positive pole of C9 connects, the other end in parallel respectively with one end and the 8th electrochemical capacitor of the 13rd resistance R13 The positive pole of C8 connects, and the base stage of audion V1 is electric with the other end of the 13rd resistance R13 and the 12nd respectively One end of resistance R12 connects, and the colelctor electrode of audion V1 is connected with leakage current protection circuit, audion V1's Emitter stage, the other end of the 12nd resistance R12, the negative pole of the 8th electric capacity C8, the negative pole of the 9th electric capacity C9, The other end of the coil of the anode summation current transformer ZCT2 of the 7th electric capacity C7 is all connected with zero line N.Work as electricity When stream exceedes the maximum current value of regulation, circuit overcurrent protection opens excess current protective function.
In the present embodiment, for test circuit, one end of the first resistance R1 is connected with zero line N, and first The other end of resistance R1 is connected with one end of feeler switch AJ, and the other end of feeler switch AJ passes zero by wire It is connected with live wire L after sequence current transformer ZCT2.When testing, particular by the first resistance R1 To mono-small area analysis of zero sequence current mutual inductor ZCT1, then test whether whole loop can normally work.
In a word, in the present embodiment, by arranging varistor MOV, reset key S1, dropout loop, preventing Electricity wall circuit, overvoltage crowbar, leakage current protection circuit, circuit overcurrent protection and test circuit, make This earth leakage protective switch on wall has earth leakage protective, overvoltage protection, residual current protection and excess current protective function, Namely this earth leakage protective switch on wall possesses electic protection function, thus can increase safety, this electric leakage Protection switch on wall have electic protection function, can the power-off when human electric shock, save electric energy, electricity can be extended The service life of device.The most also reduce the probability that electrical fire occurs, reduce property loss.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, all Within protection domain of the present utility model should be included in.

Claims (8)

1. an earth leakage protective switch on wall, it is characterised in that include power end, varistor, reset key, Dropout loop, anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, circuit overcurrent protection and Test circuit, described power end input AC electricity, the two ends of described varistor respectively with described alternating current Live wire and zero line connect, and two ends with described varistor respectively, the two ends of described reset key are connected, are used for connecing On-off opens loop, and described dropout loop is connected with described reset key, in overvoltage, oversampling circuit, leakage Disconnecting described power end in the case of electric current or ground wire electrification, described anti-electricity wall circuit returns with described dropout respectively Road and reset key connect, described overvoltage crowbar is connected with described dropout loop and anti-electricity wall circuit respectively, Overvoltage protection, described leakage current protection circuit is carried out when overtension between described live wire and zero line Be connected with described dropout loop and passed by described live wire and zero line, for there is leakage current time carry out leakage current Protection, described circuit overcurrent protection is connected with described dropout loop and leakage current protection circuit respectively, and by Described live wire passes, for carrying out overcurrent protection, one end of described test circuit and institute when current is excessive Stating zero line to connect, the other end is connected with described leakage current protection circuit, is used for testing described earth leakage protective wall Whether switch can normally work.
Earth leakage protective switch on wall the most according to claim 1, it is characterised in that described dropout loop Including tripping coil, controllable silicon, the first filter capacitor, the 6th resistance and earth leakage protective control chip, described One end of tripping coil is connected with described live wire, for driving described reset key to disconnect when there is leakage current, Carrying out residual current protection, the other end of described tripping coil is connected with described silicon controlled anode, described controlled The anode of silicon is connected with the 5th pin of described earth leakage protective control chip also by described 6th resistance, described Silicon controlled controls pole and draws with one end of described first filter capacitor and the 7th of earth leakage protective control chip respectively Foot connects, and described silicon controlled negative electrode is protected with described zero line, the other end of the first filter capacitor and electric leakage respectively The 6th pin protecting control chip connects.
Earth leakage protective switch on wall the most according to claim 2, it is characterised in that described anti-electricity wall electricity Road includes the second resistance, toggle switch, the 3rd resistance, the 4th resistance and the 3rd diode, described second electricity One end of resistance is connected with described live wire, and the other end of described second resistance passes through described toggle switch ground connection, institute The anode stating one end of the 3rd resistance, one end of the 4th resistance and the 3rd diode connects, described 3rd resistance Other end ground connection, the other end of described 4th resistance is connected with described zero line.
Earth leakage protective switch on wall the most according to claim 3, it is characterised in that described overvoltage protection Circuit include the first diode, the 5th resistance, the 8th diode, the 7th resistance, the second light emitting diode, Second electric capacity and the 4th diode, the anode of described first diode is connected with described live wire, and the described 1st The negative electrode of pole pipe by described 5th resistance respectively with one end and the anode of the 8th diode of described 7th resistance Connecting, the other end of described 7th resistance is connected with described zero line by described second light emitting diode, described The negative electrode of the 8th diode is connected with described zero line by described second electric capacity, the negative electrode of described 8th diode It is connected with the 8th pin of earth leakage protective control chip also by described 4th diode, described 8th diode Negative electrode also negative electrode with described 3rd diode be connected.
5. according to the earth leakage protective switch on wall described in claim 2 to 4 any one, it is characterised in that Described leakage current protection circuit include zero sequence current mutual inductor, the tenth resistance, the 5th electric capacity, the 11st resistance, 7th electrochemical capacitor, the 6th electric capacity, the 8th resistance, the 9th resistance, the 3rd electric capacity and the 4th electric capacity, described Live wire and zero line both pass through one end that described zero sequence current mutual inductor, described tenth resistance and the 5th electric capacity are in parallel It is connected with one end of the coil of described zero sequence current mutual inductor, the other end in parallel and described zero sequence current mutual inductance The other end of the coil of device connects, and one end of the coil of described zero sequence current mutual inductor is the most respectively with the described 6th One end of one end of electric capacity, the 3rd pin of earth leakage protective control chip and the 4th electric capacity connects, described zero sequence The other end of the coil of current transformer passes sequentially through described 11st resistance and the 7th electric capacity respectively with described Second pin of the other end of six electric capacity and earth leakage protective control chip connects, one end of described 3rd electric capacity with 8th pin of described earth leakage protective control chip connects, and the first pin of described earth leakage protective control chip leads to Cross described 8th resistance to be connected with one end of described 9th resistance, the other end of described 3rd electric capacity, the 9th electricity Resistance the other end, the other end of the 4th electric capacity and earth leakage protective control chip the 4th pin all with described zero line Connect.
Earth leakage protective switch on wall the most according to claim 5, it is characterised in that described over current protection Protection circuit includes current transformer, the 15th resistance, the 16th resistance, the tenth electrochemical capacitor, the six or two pole Pipe, the 7th diode, the 8th electrochemical capacitor, the 9th electrochemical capacitor, the 12nd resistance, the 13rd resistance, 14th resistance, the 5th diode and audion, described live wire passes described current transformer, by described electricity Current transformer senses the electric current of described live wire, described 15th resistance and one end of the 16th resistor coupled in parallel and institute The one end of the coil stating current transformer connects, and the other end in parallel is another with the coil of described current transformer One end connect, one end of the coil of described current transformer also by described tenth electrochemical capacitor respectively with described The anode of the 6th diode and the negative electrode of the 7th diode connect, and described 5th diode and the 14th resistance are also One end of connection is connected with the described negative electrode of the 6th diode and the positive pole of the 9th electrochemical capacitor respectively, and in parallel is another One end is connected with described one end of 13rd resistance and the positive pole of the 8th electrochemical capacitor respectively, described audion Base stage is connected with the described other end of the 13rd resistance and one end of the 12nd resistance respectively, described audion Colelctor electrode is connected with described leakage current protection circuit, the emitter stage of described audion, the 12nd resistance another End, the coil of anode summation current transformer of the negative pole of the 8th electric capacity, the negative pole of the 9th electric capacity, the 7th electric capacity The other end be all connected with described zero line.
Earth leakage protective switch on wall the most according to claim 6, it is characterised in that described test circuit Including the first resistance and feeler switch, one end of described first resistance is connected with described zero line, described first resistance The other end be connected with one end of described feeler switch, the other end of described feeler switch by wire through described zero It is connected with described live wire after sequence current transformer.
Earth leakage protective switch on wall the most according to claim 1, it is characterised in that described reset key is Double-pole switch.
CN201620412770.1U 2016-05-06 2016-05-06 Earth leakage protection wall switch Expired - Fee Related CN205583646U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105811367A (en) * 2016-05-06 2016-07-27 广州市博达电子科技有限公司 Electric leakage protection wall switch
CN110417247A (en) * 2019-07-12 2019-11-05 深圳市微风通讯技术有限公司 Faraday's lightning protection power source protective module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105811367A (en) * 2016-05-06 2016-07-27 广州市博达电子科技有限公司 Electric leakage protection wall switch
CN110417247A (en) * 2019-07-12 2019-11-05 深圳市微风通讯技术有限公司 Faraday's lightning protection power source protective module

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