CN204794013U - Earth -leakage protector control circuit - Google Patents

Earth -leakage protector control circuit Download PDF

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Publication number
CN204794013U
CN204794013U CN201520563523.7U CN201520563523U CN204794013U CN 204794013 U CN204794013 U CN 204794013U CN 201520563523 U CN201520563523 U CN 201520563523U CN 204794013 U CN204794013 U CN 204794013U
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module
electric
output
circuit
input
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CN201520563523.7U
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Chinese (zh)
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章华联
章国坚
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Yueqing Dongya Electric Switch Factory
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Yueqing Dongya Electric Switch Factory
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Abstract

The utility model relates to an earth -leakage protector control circuit for detect electrical equipment's electric leakage, it includes power module, is used for the supply voltage of whole circuit, the break -make module sets up between power module and electrical equipment for control electrical equipment, trigger module is connected with the break -make module for make the action of break -make module, leak the electric output module, the setting is between trigger module and electrical equipment, a trigger module is exported to the voltage difference for gathering electrical equipment shell PE end is rather than input 1 or output between 2, it holds rather than the voltage difference of output between 2 rather than the voltage difference or the electrical equipment shell PE of input between 1 to gather electrical equipment shell PE end, it does not have the ground wire and meets when electric leakage to have compensatied present earth -leakage protector, electrified or the electrified defect that does not enable the outage of break -make module in aquatic of electrical equipment shell, consequently, reduce the emergence that electrical equipment electric leakage short circuit caused conflagration or casualties accident.

Description

A kind of control circuit of earth leakage
Technical field
The utility model relates to a kind of earth leakage protective device, particularly a kind of control circuit of earth leakage.
Background technology
At present, earth leakage protective device electronic type on domestic and international market, electromagnetic type is all utilize residual current to have leaked electricity protection, leak electricity to there is no residual current and can not automatic trip protect, and in daily life, industrial and mining enterprises, office block, supply socket in family, wall socket has ground wire socket aperture, but much do not have earth connection room or virtual earth line there is no ground connection, electric equipment is also had to require outer cover metal ground connection again, in routine use process, some is not by electric appliance casing metallic ground lines, two electric appliances are also had itself to only have two line L lines and N line without ground wire, can leak electricity when power consumption equipment insulation damages by the residual current earth leakage protective device on market, automatic trip to protect there is no residual current earth leakage protective device under Grounding, only just can operate when human body derives leakage current.When the person one place touches the earth, the electricity leaked electricity in water flows to the earth from human body, and residual current earth leakage protective device just can trip and cut off the electricity supply; electric current is easily hurted sb.'s feelings by the person in this course; the lighter falls injured, severe one threat to life, and real in daily life have generation.
Utility model content
In order to overcome the deficiency of background technology, the utility model provides a kind of control circuit of earth leakage.
The technical scheme that the utility model adopts is: a kind of control circuit of earth leakage, and for detecting the electric leakage of electric equipment, it comprises power module, for the power supply supply of whole circuit; Break-make module, is arranged between power module and electric equipment, electric for obtaining of control apparatus equipment; Trigger module, with break-make model calling, for making break-make module action; Electric leakage signal output module, is arranged between trigger module and electric equipment, holds and voltage difference between its input 1 or output 2 output to trigger module for gathering electrical equipment shell PE.
Described electric leakage signal output module comprises photoelectric coupled circuit, high_voltage isolation pipe D5/D6, current-limiting resistance R9, described high_voltage isolation pipe D5 is connected between the input A2 of electric equipment output 2 and photoelectric coupled circuit, described high_voltage isolation pipe D6 is connected between the input A2 of electric equipment input 1 and photoelectric coupled circuit, current-limiting resistance R9 is connected to electrical equipment shell PE and holds between the input A1 of photoelectric coupled circuit, and the output terminals A 3/A4 of photoelectric coupled circuit is connected with trigger module.
Described electric leakage signal output module is also for gathering the difference between current between electric equipment input 1 and output 2, it comprises electric leakage mutual inductor, described electric leakage mutual inductor is socketed in the input 1 of electric equipment with on output 2, and its current signal sensed is connected with trigger module through amplifying circuit.
Described power module comprises first via power supply and exports and the second road power supply output, and described break-make module adopts Control, and relay switch K1 is connected on first via power supply and exports between electric equipment, and relay coil L1 exports with the second road power supply and is connected.
Described trigger module is connected in parallel on relay coil L1 two ends, and its trigger electrode obtains the output signal of electric leakage signal output module, can make trigger module conducting, and this trigger module is controllable silicon or triode.
Be provided with reset circuit, this reset circuit and break-make model calling, for the break-make module that resets.
Be provided with test module, be arranged between electric leakage signal output module and electric equipment, for testing the normal work of electric leakage signal output module.
The beneficial effects of the utility model are: the utility model gathers the voltage difference between electrical equipment shell PE end with its input 1 or electrical equipment shell PE holds and voltage difference between its output 2; compensate for current earth leakage protective device when running into electric leakage without ground wire; the charged defect that can not make break-make module power-down in the charged or water of electrical equipment shell, therefore reduces the generation that electric equipment leak electricity short-circuit causes fire or personnel casualty accidents.
Accompanying drawing explanation
Fig. 1 is module diagram of the present utility model.
Fig. 2 is the schematic diagram of the utility model embodiment 1.
Fig. 3 is the schematic diagram of the utility model embodiment 2.
Fig. 4 is the schematic diagram of the utility model embodiment 3.
Fig. 5 is the schematic diagram of the utility model embodiment 4.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
As shown in Figure 1, Figure 3, a kind of control circuit of earth leakage, for detecting the electric leakage of electric equipment, it comprises power module, for the power supply supply of whole circuit, break-make module, is arranged between power module and electric equipment, electric for obtaining of control apparatus equipment, trigger module, with break-make model calling, for making break-make module action, electric leakage signal output module, be arranged between trigger module and electric equipment, hold and voltage difference between its input 1 or output 2 output to trigger module for gathering electrical equipment shell PE, gather the voltage difference between electrical equipment shell PE end with its input 1 or electrical equipment shell PE holds and voltage difference between its output 2, compensate for current earth leakage protective device when running into electric leakage without ground wire, the charged defect that can not make break-make module power-down in the charged or water of electrical equipment shell, therefore the generation that electric equipment leak electricity short-circuit causes fire or personnel casualty accidents is reduced.
Described electric leakage signal output module comprises photoelectric coupled circuit, high_voltage isolation pipe D5/D6, current-limiting resistance R9, resistance R7/R8/R10, described high_voltage isolation pipe D5 one end is connected with the output 2 of electric equipment through resistance R7, the other end is connected with the input A2 of photoelectric coupled circuit, described high_voltage isolation pipe D6 one end is connected with the input 1 of electric equipment through resistance R8, the other end is connected with the input A2 of photoelectric coupled circuit, current-limiting resistance R9 is connected to electrical equipment shell PE and holds between the input A1 of photoelectric coupled circuit, resistance R10 is connected in parallel between the input A1/A2 of photoelectric coupled circuit, the output terminals A 3/A4 of photoelectric coupled circuit is connected with trigger module, PE holds-R9-D10-D5-R7-electric equipment output 2 to form loop, or PE holds-R9-D10-D6-R8-electric equipment input 1 to form loop, the reverse proof voltage of diode D5/D6 is high, can effectively prevent from forming return circuit.
Described power module comprises first via power supply and exports and the second road power supply output, export as first via power supply after piezo-resistance RM in parallel between zero line N and live wire L, export as the second road power supply after rectifier bridge in parallel between zero line N and live wire L, described break-make module adopts Control, relay switch K1 is connected on first via power supply and exports between electric equipment, and relay coil L1 exports with the second road power supply and is connected.
At live wire L and RC oscillating circuit of connecting between rectifier bridge, this RC oscillating circuit is made up of electric capacity C1 and resistance R1 parallel connection, to realize step-down.
After resistance R2 and electric capacity C2 connects, be connected in parallel between the second road power supply output.
Embodiment 1:
As shown in Figure 2, described trigger module adopts controllable silicon Q1, controllable silicon Q1 is connected in parallel on relay coil L1 two ends, the anode of controllable silicon Q1 is connected with the port one of relay coil L1, the negative electrode of controllable silicon Q1 is connected with the port 2 of relay coil L1, its trigger electrode is connected with the output terminals A 4 of photoelectric coupled circuit, obtains signal, can make trigger module conducting from this output terminals A 4; The output terminals A 3 of photoelectric coupled circuit connects controllable silicon Q1 anode through resistance R3, and meanwhile, the output terminals A 3 of photoelectric coupled circuit connects controllable silicon Q1 negative electrode through electric capacity C8.
Embodiment 2:
As shown in Figure 3, on the basis of embodiment 1, increase by one group of electric leakage signal output module.
Described trigger module adopts controllable silicon Q1, controllable silicon Q1 is connected in parallel on relay coil L1 two ends, the anode of controllable silicon Q1 is connected with the port one of relay coil L1, the negative electrode of controllable silicon Q1 is connected with the port 2 of relay coil L1, its trigger electrode is connected with the output terminals A 4 of photoelectric coupled circuit, obtain signal from this output terminals A 4, trigger module conducting can be made; The output terminals A 3 of photoelectric coupled circuit connects controllable silicon Q1 anode through resistance R3, and meanwhile, the output terminals A 3 of photoelectric coupled circuit connects controllable silicon Q1 negative electrode through electric capacity C8.
Described electric leakage signal output module is also for gathering the difference between current between electric equipment input 1 and output 2, it comprises electric leakage mutual inductor L2, described electric leakage mutual inductor L2 is socketed in the input 1 of electric equipment with on output 2, respond to the electric current of input 1 and output 2 respectively, when the electric current of its induction exists difference between current, namely output signal, this signal is connected with trigger module through amplifying circuit.
Described amplifying circuit adopts 54123 chips, and the pin 7 of 54123 chips, as the information output of electric leakage mutual inductor L2, is connected with the trigger electrode of controllable silicon Q1.
Embodiment 3:
As shown in Figure 4, be provided with reset circuit, this reset circuit and break-make model calling, for the break-make module that resets, it comprises NPN triode Q2, resistance R3/R4/R5/R11/R12, electric capacity C2, diode D8, the described collector electrode of NPN triode Q2 is connected with the port 2 of relay coil L1, and emitting stage is connected with the port one of relay coil L1 through electric capacity C2, and base stage is through resistance R11/R5/R4/R3, the port one of diode D8 contact relay coil L1, parallel resistance R12 between base stage and emitting stage.
Described trigger module adopts controllable silicon Q1, the anode of controllable silicon Q1 is connected with the node of resistance R11/R5, and the negative electrode of controllable silicon Q1 is connected with the emitting stage of NPN triode Q2, and its trigger electrode is connected with the output terminals A 4 of photoelectric coupled circuit, obtain signal from this output terminals A 4, controllable silicon Q1 conducting can be made; The output terminals A 3 of photoelectric coupled circuit connects controllable silicon Q1 anode.
Be provided with reset button K3, this reset button K3 is connected in parallel on controllable silicon Q1 two ends.When electric leakage being detected, relay switch K1 disconnects, and when after failture evacuation, presses reset button K3, now controllable silicon Q1 two terminal shortcircuit, thus controllable silicon Q1 disconnects.
Embodiment 4:
As shown in Figure 5, on the basis of embodiment 3, increase by one group of electric leakage signal output module.
Described electric leakage signal output module is also for gathering the difference between current between electric equipment input 1 and output 2, it comprises electric leakage mutual inductor L2, described electric leakage mutual inductor L2 is socketed in the input 1 of electric equipment with on output 2, and its current signal sensed is connected with trigger module through amplifying circuit.
Described amplifying circuit adopts 4145 chips, and the pin 5 of 4145 chips, as the information output of electric leakage mutual inductor L2, is connected with the trigger electrode of controllable silicon Q1.
For embodiment 1; as long as the shell of electric equipment has electric leakage; then the output 2 of electric equipment can produce voltage difference with input 1, and now, the input A2 of photoelectric coupled circuit is low level; input A1 is high level; light-emitting diode D10 conducting in photoelectric coupled circuit, output terminals A 4 output signal of photoelectric coupled circuit makes controllable silicon Q1 conducting, and relay coil L1 two ends are shorted; relay switch K1 disconnects, thus plays leakage protection to electric equipment.
Whether, for embodiment 2, while whether the shell detecting electric equipment leaks electricity, also detect between electric equipment input 1 and output 2 and leak electricity, if there is electric leakage, meeting generation current is poor, thus makes controllable silicon Q1 conducting, and relay coil L1 two ends are shorted.
For embodiment 3 and embodiment 4, if the shell of electric equipment have electric leakage or have electric leakage between electric equipment input 1 and output 2, then controllable silicon Q1 conducting, NPN triode Q2 disconnects, and relay coil L1 two ends are by open circuit, and relay switch K1 disconnects; When after failture evacuation, press reset button K3, controllable silicon Q1 is disconnected, now the second road power supply exports through resistance R3/R4/R5, be added in the base stage of NPN triode Q2, make NPN triode Q2 conducting, relay coil L1 and the second electric power generating composition loop, road, relay switch K1 closes, and this control circuit resets.
Be provided with test module, be arranged between electric leakage signal output module and electric equipment, for testing the normal work of electric leakage signal output module, it comprises testing button K2 and resistance R6, and this test module has two kinds of structures:
The first, testing button K2 one end is through the input 1 of resistance R6 circuit closer equipment, the zero line N of other end contact relay K switch 1 holds, close relay switch K1, press testing button K2, electric leakage mutual inductor L2 produces induced current on live wire L, zero line N does not produce induced current, therefore there is difference between current in electric leakage mutual inductor L2, output signal triggers the trigger electrode of controllable silicon Q1, relay switch K1 is disconnected, so, check whether electric leakage signal output module normally works with testing button K2, reach the object of checkout.
The second, testing button K2 one end is through the input 1 of resistance R6 circuit closer equipment, another termination electrical appliance enclosure PE holds, close relay switch K1, press testing button K2, live wire L-R6-R9-D10-D5-R7, form a loop, light-emitting diode D10 two ends produce voltage difference and conducting, the output terminals A 4 of photoelectric coupled circuit outputs signal the trigger electrode triggering controllable silicon Q1, relay switch K1 is disconnected, so, check whether electric leakage signal output module normally works with testing button K2, reach the object of checkout.
Below described by reference to the accompanying drawings embodiment is only preferred implementation of the present utility model, and the restriction not to protection range of the present utility model, and any improvement done based on the utility model spirit all ought within the utility model protection range.

Claims (7)

1. a control circuit of earth leakage, for detecting the electric leakage of electric equipment, is characterized in that: it comprises
Power module, for the power supply supply of whole circuit;
Break-make module, is arranged between power module and electric equipment, electric for obtaining of control apparatus equipment;
Trigger module, with break-make model calling, for making break-make module action;
Electric leakage signal output module, is arranged between trigger module and electric equipment, holds and voltage difference between its input 1 or output 2 output to trigger module for gathering electrical equipment shell PE.
2. a kind of control circuit of earth leakage according to claim 1; it is characterized in that: described electric leakage signal output module comprises photoelectric coupled circuit, high_voltage isolation pipe D5/D6; current-limiting resistance R9; described high_voltage isolation pipe D5 is connected between the input A2 of electric equipment output 2 and photoelectric coupled circuit; described high_voltage isolation pipe D6 is connected between the input A2 of electric equipment input 1 and photoelectric coupled circuit; current-limiting resistance R9 is connected to electrical equipment shell PE and holds between the input A1 of photoelectric coupled circuit, and the output terminals A 3/A4 of photoelectric coupled circuit is connected with trigger module.
3. a kind of control circuit of earth leakage according to claim 1; it is characterized in that: described electric leakage signal output module is also for gathering the difference between current between electric equipment input 1 and output 2; it comprises electric leakage mutual inductor; described electric leakage mutual inductor is socketed in the input 1 of electric equipment with on output 2, and its current signal sensed is connected with trigger module through amplifying circuit.
4. a kind of control circuit of earth leakage according to claim 1; it is characterized in that: described power module comprises first via power supply and exports and the second road power supply output; described break-make module adopts Control; relay switch K1 is connected on first via power supply and exports between electric equipment, and relay coil L1 exports with the second road power supply and is connected.
5. a kind of control circuit of earth leakage according to claim 4; it is characterized in that: described trigger module is connected in parallel on relay coil L1 two ends; its trigger electrode obtains the output signal of electric leakage signal output module, can make trigger module conducting, and this trigger module is controllable silicon or triode.
6. a kind of control circuit of earth leakage according to any one of claim 1-5, is characterized in that: be provided with reset circuit, and this reset circuit and break-make model calling, for the break-make module that resets.
7. a kind of control circuit of earth leakage according to any one of claim 1-5, is characterized in that: be provided with test module, is arranged between electric leakage signal output module and electric equipment, for testing the normal work of electric leakage signal output module.
CN201520563523.7U 2014-09-29 2015-07-30 Earth -leakage protector control circuit Active CN204794013U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201420564013 2014-09-29
CN201520563523.7U CN204794013U (en) 2014-09-29 2015-07-30 Earth -leakage protector control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520563523.7U CN204794013U (en) 2014-09-29 2015-07-30 Earth -leakage protector control circuit

Publications (1)

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CN204794013U true CN204794013U (en) 2015-11-18

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Application Number Title Priority Date Filing Date
CN201520563523.7U Active CN204794013U (en) 2014-09-29 2015-07-30 Earth -leakage protector control circuit

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451375A (en) * 2016-08-29 2017-02-22 厦门盈瑞丰电子科技有限公司 Residual current monitor for equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451375A (en) * 2016-08-29 2017-02-22 厦门盈瑞丰电子科技有限公司 Residual current monitor for equipment

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