CN104993329A - Leakage protection plug with switchable protection modes - Google Patents

Leakage protection plug with switchable protection modes Download PDF

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Publication number
CN104993329A
CN104993329A CN201510431422.9A CN201510431422A CN104993329A CN 104993329 A CN104993329 A CN 104993329A CN 201510431422 A CN201510431422 A CN 201510431422A CN 104993329 A CN104993329 A CN 104993329A
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CN
China
Prior art keywords
1st
2nd
connected
ground wire
described
Prior art date
Application number
CN201510431422.9A
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Chinese (zh)
Inventor
谭文兴
史泽华
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深圳市良辉科技有限公司
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Priority to CN201510431422.9A priority Critical patent/CN104993329A/en
Publication of CN104993329A publication Critical patent/CN104993329A/en

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Abstract

A leakage protection plug with switchable protection modes comprises a shell, a bolt, phase lines, zero lines, ground lines, a zero-sequence current transformer, a test loop, an electromagnetic tripping and locking device, a ground line fault current detection circuit, a ground line fault voltage detection circuit, a regulated power supply, a first change-over switch, and a first wire. The output end of a secondary winding of the zero-sequence current transformer is connected in parallel with the input end of an amplification circuit. The output ends of first and second voltage comparators are connected with the common output end of the first change-over switch and one end of the first wire. The other end of the first wire passes through the zero-sequence current transformer to be connected with the negative electrode of the direct-current output end of a first rectifier circuit. The leakage protection plug can be selectively switched between a ground line fault current protection mode and a ground line fault voltage protection mode. The problem that a plug may be tripped falsely is solved. Higher electrical safety is ensured for people.

Description

A kind of leakage protecting plug of energy translation and protection pattern

Technical field

The present invention relates to Electrical Safety resist technology field, especially relate to a kind of leakage protecting plug of energy translation and protection pattern.

Background technology

Existing leakage protecting plug is by ground wire fault current detection being divided into protect to the detection protected mode of ground wire electrification and ground wire false voltage detection protection two series products.

Chinese patent literature CN1142618C discloses a kind of leakage protecting plug that can detect ground wire fault current; on this leakage protecting plug when protection system to earth exception causes ground wire accident charged; ground wire can be detected and have non-faulty current; when ground wire fault current reaches preset threshold values, it action immediately can cut off phase line, zero line and ground wire.It can thus be appreciated that; as long as this kind of leakage protecting plug ground wire fault current reaches predetermined threshold values; leakage protecting plug will trip and with ground wire with false voltage height irrelevant; therefore; this kind of leakage protecting plug is when ground wire false voltage is lower but cause leakage protecting plug mistrip because ground wire occurs being greater than predetermined threshold values fault current, causes people to use.

Chinese patent literature CN202142735U also discloses a kind of leakage protecting plug that can detect ground wire false voltage, and this kind of leakage protecting plug will automatic trip and haveing nothing to do with the size of ground wire fault current when the abnormal and ground wire false voltage of grounding system reaches predetermined threshold values.Therefore, this kind of leakage protecting plug the false voltage that ground wire exists be greater than reservation threshold induced voltage but flow through the fault current of ground wire very faint time also can cause this kind of leakage protecting plug mistrip, cause people to use.

For this reason, electric heater market can adapt to the ground wire electric leakage protection technology solution of various power utilization environment in the urgent need to a kind of, thus the probability that minimizing returns goods after sale and keep in repair can be reached.

Summary of the invention

The object of the present invention is to provide a kind of leakage protecting plug of energy translation and protection pattern; this leakage protecting plug can not only detect ground wire fault current and ground wire false voltage; optionally can also change the creepage protection function of ground wire detection failure electric current and detection failure voltage; thus both solved because mistrip causes the problem that cannot use, again reduce after-sales service rate and maintenance cost.

Technical solution proposed by the invention is such:

A leakage protecting plug for energy translation and protection pattern, includes shell, latch, 1st phase line and the 2nd phase line, 1st zero line and the 2nd zero line, 1st ground wire and the 2nd ground wire, the zero sequence current mutual inductor that described 2nd phase line and the 2nd zero line all pass, test loop, electromagnetic trip and locker, this electromagnetic trip and locker are by solenoid and drive circuit thereof, phase line switch contacts, zero line switch contacts, ground wire switch contacts forms, and the drive circuit of described solenoid is primarily of the 1st rectification circuit, controllable silicon, amplifying circuit forms, and the output of described zero sequence current mutual inductor secondary winding and the input of described amplifying circuit are connected in parallel, and are also provided with ground wire fault current detection circuit, ground wire false voltage testing circuit, stabilized voltage power supply, 1st change over switch, 1st wire, described ground wire fault current detection circuit is provided with ground wire electrified detection inductor, 1st voltage comparator, described ground wire false voltage testing circuit is provided with the 1st electric capacity, 2nd rectification circuit, 1st resistance, photoelectrical coupler, 2nd voltage comparator, described 2nd ground wire is through ground wire electrified detection inductor, ground wire electrified detection inductor secondary winding one output is connected with the 1st rectification circuit DC output end negative pole, another output of ground wire electrified detection inductor secondary winding is connected with another input of the 1st voltage comparator, from an input of the 1st reference power supply feeding the 1st voltage comparator that output end of stabilized voltage supply power taking obtains after dividing potential drop, by described 1st electric capacity, the ac input end of the 2nd rectification circuit, the loop that 1st resistance is in series successively is connected between the 1st described ground wire and the 1st zero line, the DC output end of the 2nd rectification circuit and the input of photoelectrical coupler are connected in parallel, photoelectrical coupler one output is connected with output end of stabilized voltage supply, another output of photoelectrical coupler is connected with another input of the 2nd voltage comparator, from an input of the 2nd reference power supply feeding the 2nd voltage comparator that output end of stabilized voltage supply power taking obtains after dividing potential drop, 1st voltage comparator output is connected with the 1st input of the 1st change over switch, 2nd voltage comparator output is connected with the 2nd input of the 1st change over switch, the public output of the 1st change over switch is connected with the 1st wire one line end, 1st another line end of wire is connected with the DC output end negative pole of the 1st rectification circuit through after zero sequence current mutual inductor, stabilized voltage power supply input is connected with the positive pole of the 1st rectification circuit DC output end by the 2nd resistance, the ground end of stabilized voltage power supply is connected with the DC output end negative pole of the 1st rectification circuit.

Described stabilized voltage power supply is made up of voltage stabilizing didoe.

Described stabilized voltage power supply is fixed integrated regulator by three ends and is formed.

Described stabilized voltage power supply is made up of three end adjustable shunt reference sources, the 3rd resistance, the 4th resistance, between the cathode terminal being connected in three end adjustable shunt reference sources in parallel by the loop of the 3rd resistance, the 4th resistant series and anode tap, the 3rd resistance is connected with the reference edge of three end adjustable shunt reference sources with the node of the 4th resistance.

Also be provided with the 2nd change over switch and light-emitting diode, 2nd input of the 2nd change over switch is connected with output end of stabilized voltage supply, the public output of the 2nd change over switch is connected with described light-emitting diode positive pole, light-emitting diode negative pole is connected with the 1st rectification circuit DC output end negative pole, and described 1st change over switch and described 2nd change over switch link and open or close.

Described 1st change over switch and the 2nd change over switch are arranged on the drain pan of described shell.

Described light-emitting diode is arranged on the face-piece of described shell.

Compared with prior art, the present invention has following remarkable result:

(1) leakage protecting plug of the present invention can detect the fault current that ground wire occurs; once the fault current that ground wire surprisingly occurs reaches predetermined threshold values; it just can immediately phase, zero, the switch contacts of ground wire all disconnects, so the present invention provides a kind of safer Electrical Safety guarantee than existing leakage protecting plug.

(2) leakage protecting plug of the present invention can detect the false voltage that ground wire occurs; once the false voltage that ground wire surprisingly occurs reaches predetermined threshold values; before people get an electric shock; it just can immediately phase, zero, the switch contacts of ground wire all disconnects, so the present invention provides a kind of safer Electrical Safety guarantee than existing leakage protecting plug.

(3) leakage protecting plug of the present invention is by the creepage protection function of change over switch selection to ground wire; suitable ground wire creepage protection function can be selected for concrete power utilization environment; both solved the problem of existing leakage protecting plug mistrip, and be convenient to again after-sales service and reduce after-sales service cost.

Leakage protecting plug of the present invention is mainly used in the earth leakage protective of various household electrical appliance, mainly makes the power line of band leakage protecting plug.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the leakage protecting plug of a kind of energy translation and protection pattern of one embodiment of the invention.

Fig. 2 is the 1st kind of replacement circuit schematic diagram of the stabilized voltage power supply 23 shown in Fig. 1.

Fig. 3 is the 2nd kind of replacement circuit schematic diagram of the stabilized voltage power supply 23 shown in Fig. 1.

Embodiment

By embodiment below, the present invention is further elaborated.

Shown in Figure 1, a kind of leakage protecting plug of energy translation and protection pattern includes shell, latch, 1st phase line 1 and the 2nd phase line 4, 1st zero line 2 and the 2nd zero line 5, 1st ground wire 3 and the 2nd ground wire 6, the zero sequence current mutual inductor 17 that described 2nd phase line 4 and the 2nd zero line 5 all pass, test loop 11, electromagnetic trip and locker, this electromagnetic trip and locker are by solenoid 13 and drive circuit thereof, phase line switch contacts 8, zero line switch contacts 10, ground wire switch contacts 12 forms, the drive circuit of described solenoid is primarily of the 1st rectification circuit 14, controllable silicon 15, amplifying circuit 16 forms, the described output of zero sequence current mutual inductor 17 secondary winding and the input of described amplifying circuit 16 are connected in parallel.Also be provided with ground wire fault current detection circuit, ground wire false voltage testing circuit, stabilized voltage power supply 23, the 1st change over switch 9-1, the 1st wire 30; Described ground wire fault current detection circuit is provided with ground wire electrified detection inductor 18, the 1st voltage comparator 24; Described ground wire false voltage testing circuit is provided with the 1st electric capacity 19, the 2nd rectification circuit 20, the 1st resistance 21, photoelectrical coupler 22, the 2nd voltage comparator 25.Described 2nd ground wire 6 is through ground wire electrified detection inductor 18, ground wire electrified detection inductor 18 secondary winding one output is connected with the 1st rectification circuit 14 DC output end negative pole, another output of ground wire electrified detection inductor 18 secondary winding is connected with another input of the 1st voltage comparator 24, and an input of the 1st voltage comparator 24 sent into by the 1st reference power supply 27 obtained after electric resistance partial pressure from the power taking of stabilized voltage power supply 23 output end vo; The loop be in series successively by the ac input end of described 1st electric capacity 19, the 2nd rectification circuit 20, the 1st resistance 21 is connected between the 1st described ground wire 3 and the 1st zero line 2, the DC output end of the 2nd rectification circuit 20 and the input of photoelectrical coupler 22 are connected in parallel, photoelectrical coupler 22 1 output is connected with stabilized voltage power supply 23 output end vo, and another output of photoelectrical coupler 22 is connected with another input of the 2nd voltage comparator 25; An input of the 2nd voltage comparator 25 sent into by the 2nd reference power supply 28 obtained after electric resistance partial pressure from the power taking of stabilized voltage power supply 23 output end vo; 1st voltage comparator 24 output is connected with the 1st input 9-1-1 of the 1st change over switch 9-1,2nd voltage comparator 25 output is connected with the 2nd input 9-1-2 of the 1st change over switch 9-1, the public output 9-1-3 of the 1st change over switch 9-1 is connected with a line end of the 1st wire 30, and another line end of the 1st wire 30 is connected with the DC output end negative pole of the 1st rectification circuit 14 through after zero sequence current mutual inductor 17.Stabilized voltage power supply 23 input Vi is connected with the positive pole of the 1st rectification circuit 14 DC output end by the 2nd resistance 7, and the ground end GND of stabilized voltage power supply 23 is connected with the DC output end negative pole of the 1st rectification circuit 14.

In the present embodiment, described stabilized voltage power supply 23 is made up of voltage stabilizing didoe 23-1, and voltage stabilizing didoe 23-1 positive pole is connected with the DC output end negative pole of the 1st rectification circuit 14, and input Vi, the output end vo of voltage stabilizing didoe 23-1 negative pole and stabilized voltage power supply 23 are connected.As shown in Figure 2, stabilized voltage power supply 23 also can select three ends to fix integrated regulator 23-2, three ends fix integrated regulator 23-2 input Vi, output end vo, hold GND replace the input Vi of stabilized voltage power supply 23 shown in Fig. 1, output end vo, hold GND.As shown in Figure 3, stabilized voltage power supply 23 can also be selected by three end adjustable shunt reference source 23-5, 3rd resistance 23-3, 4th resistance 23-4 is formed, by the 3rd resistance 23-3, between the cathode terminal that the loop that 4th resistance 23-4 is in series is connected in three end adjustable shunt reference source 23-5 in parallel and anode tap, 3rd resistance 23-3 is connected with the reference edge of three end adjustable shunt reference source 23-5 with the node of the 4th resistance 23-4, the cathode terminal of three end adjustable shunt reference source 23-5 is equivalent to the input Vi of stabilized voltage power supply 23 shown in Fig. 1, output end vo, the anode tap of three end adjustable shunt reference source 23-5 is equivalent to the ground end GND of stabilized voltage power supply 23 shown in Fig. 1.

The present invention can also be equipped with the 2nd change over switch 9-2 and light-emitting diode 29, the 2nd input 9-2-2 of the 2nd change over switch 9-2 is connected with stabilized voltage power supply 23 output end vo, the public output 9-2-3 of the 2nd change over switch 9-2 is connected with described light-emitting diode 29 positive pole, light-emitting diode 29 negative pole is connected with the 1st rectification circuit 14 DC output end negative pole by resistance, and the 1st input 9-2-1 of the 2nd change over switch 9-2 is unsettled; Described 1st change over switch 9-1 and described 2nd change over switch 9-2 links and opens or closes.

In the present embodiment, on described 1st change over switch 9-1 and the integrated drain pan being arranged on described shell of the 2nd change over switch 9-2.

In the present embodiment, described light-emitting diode 29 is arranged on the face-piece of described shell.

During use, leakage protecting plug reset key is pressed, the consuming device that the closed connection mains supply of phase line switch contacts 8, zero line switch contacts 10, ground wire switch contacts 12 is lower end provides working power.

During use, leak electricity if damaged generation occurs in the insulation of consuming device, zero sequence current mutual inductor 17 detects this electric leakage signal and the 1st input 16-1 of this signal input amplifying circuit 16 and the 2nd input 16-2, when leakage current reaches predetermined threshold values, amplifying circuit 16 outputs signal and triggers controllable silicon 15 conducting and solenoid 13 is worked phase line switch contacts 8, zero line switch contacts 10, ground wire switch contacts 12 all disconnected immediately, thus has ensured the Electrical Safety of people.

If when leakage protecting plug of the present invention is selected the 1st change over switch 9-1 to be connected to ground wire fault-current protection pattern according to environment for use in advance, connect between the 1st input 9-1-1 of the 1st change over switch 9-1 and the public output 9-1-3 of the 1st change over switch 9-1, the 2nd input 9-1-2's of the 1st change over switch 9-1 and the public output 9-1-3 of the 1st change over switch 9-1 is separated, also connect between the 1st input 9-2-1 of the 2nd change over switch 9-2 and the public output 9-2-3 of the 2nd change over switch 9-2 simultaneously, also disconnect between the 2nd input 9-2-2 of the 2nd change over switch 9-2 and the public output 9-2-3 of the 2nd change over switch 9-2, but the 1st input 9-2-1 due to the 2nd change over switch 9-2 is in vacant state and is not connected to power supply, so light-emitting diode 29 is in OFF state.When grounding system generation exception causes the 1st ground wire 3 and the 2nd ground wire 6 accident is charged, ground wire electrified detection inductor 18 on ground wire fault current detection circuit detects the fault current flowing through the 2nd ground wire 6 immediately and outputs signal to the 1st voltage comparator 24, when the ground wire fault current detected is greater than predetermined current threshold, 1st voltage comparator 24 exports high level signal to the 1st input 9-1-1 of the 1st change over switch 9-1, the public output 9-1-3 of the 1st change over switch 9-1 sends this signal into zero sequence current mutual inductor 17 by the 1st wire 30, zero sequence current mutual inductor 17 detects this signal and impels amplifying circuit 16 to output signal the conducting of triggering controllable silicon 15 and makes solenoid 13 work phase line switch contacts 8, zero line switch contacts 10, ground wire switch contacts 12 all disconnects immediately, thus ensured the Electrical Safety of people better.

If when leakage protecting plug of the present invention is selected the 1st change over switch 9-1 to be connected to ground wire false voltage protected mode according to environment for use in advance, the 1st input 9-1-1's of the 1st change over switch 9-1 and the public output 9-1-3 of the 1st change over switch 9-1 is separated, connects between the 2nd input 9-1-2 of the 1st change over switch 9-1 and the public output 9-1-3 of the 1st change over switch 9-1; Also disconnect between the 1st input 9-2-1 of the 2nd change over switch 9-2 and the public output 9-2-3 of the 2nd change over switch 9-2 simultaneously, also connect between the 2nd input 9-2-2 of the 2nd change over switch 9-2 and the public output 9-2-3 of the 2nd change over switch 9-2, the 2nd input 9-2-2 of the 2nd change over switch 9-2 connects the output end vo of stabilized voltage power supply 23, and light-emitting diode 29 luminescence is lighted.When grounding system generation exception causes the 1st ground wire 3 and the 2nd ground wire 6 accident is charged, photoelectrical coupler 22 on ground wire false voltage testing circuit outputs signal to the 2nd voltage comparator 25, when the ground wire false voltage detected is greater than predetermined threshold voltage, 2nd voltage comparator 25 exports high level signal to the 2nd input 9-1-2 of the 1st change over switch 9-1, the public output 9-1-3 of the 1st change over switch 9-1 sends this signal into zero sequence current mutual inductor 17 by the 1st wire 30 and impels amplifying circuit 16 to output signal to trigger controllable silicon 15 conducting and makes solenoid 13 work phase line switch contacts 8, zero line switch contacts 10, ground wire switch contacts 12 all disconnects immediately, thus ensured the Electrical Safety of people better.

Claims (7)

1. the leakage protecting plug of an energy translation and protection pattern, include shell, latch, 1st phase line and the 2nd phase line, 1st zero line and the 2nd zero line, 1st ground wire and the 2nd ground wire, the zero sequence current mutual inductor that described 2nd phase line and the 2nd zero line all pass, test loop, electromagnetic trip and locker, this electromagnetic trip and locker are by solenoid and drive circuit thereof, phase line switch contacts, zero line switch contacts, ground wire switch contacts forms, the drive circuit of described solenoid is primarily of the 1st rectification circuit, controllable silicon, amplifying circuit forms, the output of described zero sequence current mutual inductor secondary winding and the input of described amplifying circuit are connected in parallel, it is characterized in that: be also provided with ground wire fault current detection circuit, ground wire false voltage testing circuit, stabilized voltage power supply, 1st change over switch, 1st wire, described ground wire fault current detection circuit is provided with ground wire electrified detection inductor, the 1st voltage comparator, and described ground wire false voltage testing circuit is provided with the 1st electric capacity, the 2nd rectification circuit, the 1st resistance, photoelectrical coupler, the 2nd voltage comparator, described 2nd ground wire is through ground wire electrified detection inductor, ground wire electrified detection inductor secondary winding one output is connected with the 1st rectification circuit DC output end negative pole, another output of ground wire electrified detection inductor secondary winding is connected with another input of the 1st voltage comparator, from an input of the 1st reference power supply feeding the 1st voltage comparator that output end of stabilized voltage supply power taking obtains after dividing potential drop, the loop be in series successively by the ac input end of described 1st electric capacity, the 2nd rectification circuit, the 1st resistance is connected between the 1st described ground wire and the 1st zero line, the DC output end of the 2nd rectification circuit and the input of photoelectrical coupler are connected in parallel, photoelectrical coupler one output is connected with output end of stabilized voltage supply, and another output of photoelectrical coupler is connected with another input of the 2nd voltage comparator, from an input of the 2nd reference power supply feeding the 2nd voltage comparator that output end of stabilized voltage supply power taking obtains after dividing potential drop, 1st voltage comparator output is connected with the 1st input of the 1st change over switch, 2nd voltage comparator output is connected with the 2nd input of the 1st change over switch, the public output of the 1st change over switch is connected with the 1st wire one line end, and the 1st another line end of wire is connected with the DC output end negative pole of the 1st rectification circuit through after zero sequence current mutual inductor, stabilized voltage power supply input is connected with the positive pole of the 1st rectification circuit DC output end by the 2nd resistance, and the ground end of stabilized voltage power supply is connected with the DC output end negative pole of the 1st rectification circuit.
2. leakage protecting plug according to claim 1, is characterized in that: described stabilized voltage power supply is made up of voltage stabilizing didoe.
3. leakage protecting plug according to claim 1, is characterized in that: described stabilized voltage power supply is fixed integrated regulator by three ends and formed.
4. leakage protecting plug according to claim 1; it is characterized in that: described stabilized voltage power supply is made up of three end adjustable shunt reference sources, the 3rd resistance, the 4th resistance; between the cathode terminal being connected in three end adjustable shunt reference sources in parallel by the loop of the 3rd resistance, the 4th resistant series and anode tap, the 3rd resistance is connected with the reference edge of three end adjustable shunt reference sources with the node of the 4th resistance.
5. leakage protecting plug according to claim 1, is characterized in that: be also provided with the 2nd change over switch and light-emitting diode; 2nd input of the 2nd change over switch is connected with output end of stabilized voltage supply, and the public output of the 2nd change over switch is connected with described light-emitting diode positive pole, and light-emitting diode negative pole is connected with the 1st rectification circuit DC output end negative pole; Described 1st change over switch and described 2nd change over switch link and open or close.
6. leakage protecting plug according to claim 5, is characterized in that: described 1st change over switch and the 2nd change over switch are arranged on the drain pan of described shell.
7. leakage protecting plug according to claim 5, is characterized in that: described light-emitting diode is arranged on the face-piece of described shell.
CN201510431422.9A 2015-07-22 2015-07-22 Leakage protection plug with switchable protection modes CN104993329A (en)

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CN201510431422.9A CN104993329A (en) 2015-07-22 2015-07-22 Leakage protection plug with switchable protection modes

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2453568Y (en) * 2000-11-21 2001-10-10 胡本玉 Electric power supply plug for preventing it from being leakage, over-voltage, over-load, short circuit and lightninhg-stroke
CN202094431U (en) * 2011-06-23 2011-12-28 刘睿刚 Leakage protection plug
CN102354866A (en) * 2011-08-09 2012-02-15 刘睿刚 Electricity leakage protection plug
CN102544930A (en) * 2012-03-07 2012-07-04 佛山市新基德电子厂有限公司 Leakage protection plug
CN204144599U (en) * 2014-09-16 2015-02-04 深圳市良辉科技有限公司 A kind of leakage protecting plug
CN104577977A (en) * 2014-12-26 2015-04-29 余姚市嘉荣电子电器有限公司 Voltage and current switchable type electric leakage protection device
CN205029115U (en) * 2015-07-22 2016-02-10 深圳市良辉科技有限公司 Can change protected mode's leakage protection plug

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2453568Y (en) * 2000-11-21 2001-10-10 胡本玉 Electric power supply plug for preventing it from being leakage, over-voltage, over-load, short circuit and lightninhg-stroke
CN202094431U (en) * 2011-06-23 2011-12-28 刘睿刚 Leakage protection plug
CN102354866A (en) * 2011-08-09 2012-02-15 刘睿刚 Electricity leakage protection plug
CN102544930A (en) * 2012-03-07 2012-07-04 佛山市新基德电子厂有限公司 Leakage protection plug
CN204144599U (en) * 2014-09-16 2015-02-04 深圳市良辉科技有限公司 A kind of leakage protecting plug
CN104577977A (en) * 2014-12-26 2015-04-29 余姚市嘉荣电子电器有限公司 Voltage and current switchable type electric leakage protection device
CN205029115U (en) * 2015-07-22 2016-02-10 深圳市良辉科技有限公司 Can change protected mode's leakage protection plug

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Application publication date: 20151021