CN106169733A - Conversion voltage-type leakage protecting plug - Google Patents

Conversion voltage-type leakage protecting plug Download PDF

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Publication number
CN106169733A
CN106169733A CN201610396623.4A CN201610396623A CN106169733A CN 106169733 A CN106169733 A CN 106169733A CN 201610396623 A CN201610396623 A CN 201610396623A CN 106169733 A CN106169733 A CN 106169733A
Authority
CN
China
Prior art keywords
resistance
ground wire
described
outfan
electric capacity
Prior art date
Application number
CN201610396623.4A
Other languages
Chinese (zh)
Inventor
田玉江
龙焕祥
郭奇
Original Assignee
佛山市顺德区信辉达电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佛山市顺德区信辉达电子有限公司 filed Critical 佛山市顺德区信辉达电子有限公司
Priority to CN201610396623.4A priority Critical patent/CN106169733A/en
Publication of CN106169733A publication Critical patent/CN106169733A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/04Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/042Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/14Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to occurrence of voltage on parts normally at earth potential
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors

Abstract

The present invention relates to a kind of conversion voltage-type leakage protecting plug, feature is to include ground connection exception display lamp warning circuit, electrical apparatus release, electronic switching circuit, ground wire false voltage supervisory circuit and fault current supervisory circuit;Ground connection exception display lamp warning circuit includes the first electric capacity and display lamp;First electric capacity connect with display lamp after the input of one end earth lead E, the input of the zero line N of another termination city alternating current;Ground wire false voltage supervisory circuit includes permutator, the second electric capacity and resistance, permutator, the second electric capacity and resistance are sequentially connected in series rear one end and electrically connect with the outfan of one group of opening and closing contact on ground wire E, and the other end controls pole with the outfan SCR of fault current supervisory circuit and the one-way SCR of electronic switching circuit respectively and electrically connects;Fault current supervisory circuit is set on the live wire L of city's alternating current, zero line N and ground wire E and on the power line of the outfan that is positioned at three groups of opening and closing contacts.Its advantage is: circuit is simple, and reliable operation, under ground wire false voltage guard mode, ground wire can reach more than 50M Ω to the insulation resistance of zero live wire, uses safer.

Description

Conversion voltage-type leakage protecting plug

Technical field

The present invention relates to a kind of conversion voltage-type leakage protecting plug.

Background technology

At present, conversion voltage-type leakage protecting plug commonly used in electrical apparatus industry, protect shape at ground wire false voltage Under state, ground wire is all in the range of 5~10M Ω to the insulation resistance of zero live wire, although all meets national standard, the most all can not expire The high standard safety requirements of foot enterprise.

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art to provide a kind of simple in construction, reliable operation, in ground wire event Under barrier voltage protection state, ground wire is more than the conversion voltage-type leakage protecting plug of 50M Ω to the insulation resistance of zero live wire, enters one Step promotes its security performance, to meet the high standard requirement of enterprise.

In order to achieve the above object, the present invention is achieved in that it is a kind of conversion voltage-type leakage protecting plug, its Be characterised by including ground connection exception display lamp warning circuit, electrical apparatus release, electronic switching circuit, ground wire false voltage supervisory circuit and Fault current supervisory circuit;Wherein

Described ground connection exception display lamp warning circuit includes the first electric capacity and display lamp;After described first electric capacity is connected with display lamp The input of one end earth lead E, the input of the zero line N of another termination city alternating current;

Electrical apparatus release includes that trip coil, three groups of opening and closing contacts and reset key, described three groups of opening and closing contacts are serially connected in city respectively On the live wire L of alternating current, zero line N and ground wire E, the input of trip coil and one group of opening and closing on the live wire L of city's alternating current The outfan electrical connection of contact, described tripping coil matches with reset key for controlling three groups of opening and closing closings of contact with disconnected Open;

Described electronic switching circuit includes diode and one-way SCR, after described diode and one-way SCR series connection one end with The outfan electrical connection of trip coil, the other end electrically connects with the common ground end GND of fault current supervisory circuit, diode And the series connection point of one-way SCR electrically connects with the power end VCC of fault current supervisory circuit;

Described ground wire false voltage supervisory circuit includes permutator, the second electric capacity and resistance, described permutator, the second electric capacity And resistance is sequentially connected in series rear one end and electrically connects with the outfan of one group of opening and closing contact on ground wire E, the other end is electric with fault respectively The outfan SCR of flow monitoring circuit and one-way SCR control pole electrical connection;

Described fault current supervisory circuit is set on the live wire L of city's alternating current, zero line N and ground wire E and is positioned at three groups of opening and closings and touches On the power line of the outfan of point.

In the technical program, also include that the first resistance, described first resistance and the first electric capacity and display lamp are serially connected After be parallel to zero line N and the input of ground wire E again.

In the technical program, also include that varistor, described resistance include the second resistance and the 3rd resistance;Described second Resistance, the 3rd resistance, the second electric capacity and permutator are sequentially connected in series rear one end and the output with one group of opening and closing contact on ground wire E End electrical connection, the other end controls pole electrically connect with outfan SCR and the one-way SCR of fault current supervisory circuit respectively;Described One end of varistor electrically connects with the series connection point of the second resistance and the 3rd resistance, and another terminates common GND.

Present invention advantage compared with prior art is: circuit is simple, and reliable operation, in ground wire false voltage guard mode Under, ground wire can reach more than 50M Ω to the insulation resistance of zero live wire, uses safer.

Accompanying drawing explanation

Fig. 1 is circuit theory diagrams of the present invention;

Fig. 2 is the schematic diagram of the fault current supervisory circuit part of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.At this it should be noted that for The explanation of these embodiments is adapted to assist in and understands the present invention, but is not intended that limitation of the invention.Additionally, it is disclosed below As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be combined with each other.

In describing the invention, term " first " to " the 3rd " be only used for describe purpose, and it is not intended that instruction or Hint relative importance.

As it is shown in figure 1, it is a kind of conversion voltage-type leakage protecting plug, including ground connection exception display lamp warning circuit 1, Electrical apparatus release 2, electronic switching circuit 3, ground wire false voltage supervisory circuit 4 and fault current supervisory circuit 5;Wherein

Described ground connection exception display lamp warning circuit 1 includes the first electric capacity C1 and display lamp LAMP;Described first electric capacity C1 and finger Show the input of one end earth lead E after lamp LAMP series connection, the input of the zero line N of another termination city alternating current;

Electrical apparatus release 2 includes trip coil JL, three groups of opening and closing contact JK1, JK2, JK3 and reset key RESET, opens for described three groups Closed contact JK1, JK2, JK3 are serially connected on the live wire L of city's alternating current, zero line N and ground wire E respectively, the input of trip coil JL The outfan electrical connection of one group of opening and closing contact JK1 on the live wire L of Duan Yu city alternating current, described tripping coil JL and reset key RESET matches for controlling three groups of opening and closing contact JK1, JK2, JK3 Guan Bis and disconnecting;

After described electronic switching circuit 3 includes diode D and one-way SCR Q, described diode D and one-way SCR Q series connection One end electrically connects with the outfan of trip coil JL, and the other end is electrically connected with the common ground end GND of fault current supervisory circuit 5 Connecing, the series connection point of diode D and one-way SCR Q electrically connects with the power end VCC of fault current supervisory circuit 5;

Described ground wire false voltage supervisory circuit 4 includes permutator Kv, the second electric capacity C2 and resistance, described permutator Kv, Second electric capacity C2 and resistance are sequentially connected in series rear one end and electrically connect with the outfan of one group of opening and closing contact JK3 on ground wire E, the other end Control pole with the outfan SCR and one-way SCR Q of fault current supervisory circuit 5 respectively to electrically connect;

Described fault current supervisory circuit 5 is set on the live wire L of city's alternating current, zero line N and ground wire E and is positioned at three groups of opening and closings and touches On the power line of the outfan of some JK1, JK2, JK3.

During work, press permutator Kv, then press reset key RESET, three groups of opening and closing contact JK1 of electrical apparatus release 2, JK2, JK3 Guan Bi switches on power, and this leakage is protected plug and i.e. worked in ground wire false voltage guard mode, when electric leakage event occurs in ground wire E During barrier, display lamp LAMP lights, and warning user ground wire E has danger of hazardous electrical discharges;Simultaneous faults voltage passes through permutator Kv and first Electric capacity C1 and resistance R2, R3 are added to one-way SCR Q and control pole and negative electrode two ends, one-way SCR Q triggering and conducting immediately, concatenation Tripping coil JL on its anode immediately passes through the biggest electric current and produces high-intensity magnetic field, pulls and is connected across zero line N and live wire L and ground Three groups of opening and closing contact JK1, JK2, JK3 tripping operations on line E, have thoroughly cut off load power source, have effectively protected personal safety;

Because the ground connection exception display lamp of plug is protected in this leakage and ground wire false voltage supervisory circuit have employed the first electric capacity C1 and the Two electric capacity C2 are two Y capacitance couplings, and the characteristic of this Y capacitance is exactly that proof voltage is high, and leakage current is little, and Insulation Resistance Tester is Direct current supply, so just having reached the ground wire E insulation resistance to zero line N and the live wire L good result more than 50M Ω, makes this product Product are more safe and reliable.

In the present embodiment, the first resistance R1, described first resistance R1 and the first electric capacity C1 and display lamp LAMP are also included Zero line N and the input of ground wire E it is parallel to again after being serially connected.

In the present embodiment, also include that varistor Ru, described resistance include the second resistance R2 and the 3rd resistance R3;Described Second resistance R2, the 3rd resistance R3, the second electric capacity C2 and permutator Kv are sequentially connected in series rear one end and open with a group on ground wire E The outfan electrical connection of closed contact JK3, the other end respectively with the outfan SCR and one-way SCR Q of fault current supervisory circuit 5 Control pole electrical connection;One end of described varistor Ru electrically connects with the series connection point of the second resistance R2 and the 3rd resistance R3, another Termination common GND.Its effect effectively filters out the various spikes interference signal that earthed circuit seals in exactly, it is ensured that this leakage is protected The defencive function of plug is firm and will not misoperation.

As in figure 2 it is shown, described fault current supervisory circuit 5 includes the zero sequence current mutual inductor being respectively sleeved on ground wire E ZCT2, the zero sequence current mutual inductor ZCT1 being set on live wire L and zero line N and processing and amplifying IC;Two zero sequence electricity Current transformer connects the input of processing and amplifying IC respectively, and the outfan of processing and amplifying IC is fault current The outfan SCR of supervisory circuit 5, the power end of processing and amplifying IC and earth terminal are respectively fault current supervisory circuit The power end VCC and common ground end GND of 5.When this product work is in leakage current protection state, once occur ground wire E or Major loop LN leak current fault, simultaneously or the fault-current signal sensed is passed two zero sequence current mutual inductors by once Deliver to the input of processing and amplifying IC, by its outfan SCR after amplified process IC processing and amplifying Send the control pole of one-way SCR Q to, trigger one-way SCR Q and turn on immediately, cause the tripping coil JL concatenated with it to lead to Excessive electric current and produce high-intensity magnetic field, pull electrical apparatus release to thread off, finally make be connected across on zero line N and live wire L and ground wire E three groups The immediate trip power-off of opening and closing contact, effectively protects the safety of the person.

Above in association with accompanying drawing, embodiments of the present invention are described in detail, but the present invention is not limited to described reality Execute mode.For the ordinary skill in the art, to these in the case of without departing from the principle of the present invention and objective Embodiment carries out multiple change, revises, replaces and deform and still fall within the scope of the present invention.

Claims (3)

1. a conversion voltage-type leakage protecting plug, it is characterised in that include ground connection exception display lamp warning circuit (1), thread off Device (2), electronic switching circuit (3), ground wire false voltage supervisory circuit (4) and fault current supervisory circuit (5);Wherein
Described ground connection exception display lamp warning circuit (1) includes the first electric capacity (C1) and display lamp (LAMP);Described first electric capacity (C1) input of one end earth lead E after connecting with display lamp (LAMP), the input of the zero line N of another termination city alternating current;
Electrical apparatus release (2) includes trip coil (JL), three groups of opening and closing contacts (JK1 to JK3) and reset key (RESET), described Three groups of opening and closing contacts (JK1 to JK3) are serially connected on the live wire L of city's alternating current, zero line N and ground wire E respectively, trip coil (JL) Input electrically connect with the outfan of one group of opening and closing contact (JK1) on the live wire L of city's alternating current, described tripping coil (JL) Match with reset key (RESET) and close and disconnect for controlling three groups of opening and closing contacts (JK1 to JK3);
Described electronic switching circuit (3) includes diode (D) and one-way SCR (Q), described diode (D) and one-way SCR (Q) after series connection, one end electrically connects with the outfan of trip coil (JL), and the other end is public with fault current supervisory circuit (5) Earth terminal GND electrically connects, the series connection point of diode (D) and one-way SCR (Q) and the power end of fault current supervisory circuit (5) VCC electrically connects;
Described ground wire false voltage supervisory circuit (4) includes permutator (Kv), the second electric capacity (C2) and resistance, and described conversion is opened Close (Kv), the second electric capacity (C2) and resistance and be sequentially connected in series the outfan electricity of rear one end and one group of opening and closing contact (JK3) on ground wire E Connecting, the other end controls pole electrically connect with outfan SCR and the one-way SCR (Q) of fault current supervisory circuit (5) respectively;
Described fault current supervisory circuit (5) is set on the live wire L of city's alternating current, zero line N and ground wire E and is positioned at three groups of opening and closings On the power line of the outfan of contact (JK1 to JK3).
Conversion voltage-type leakage protecting plug the most according to claim 1, it is characterised in that also include the first resistance (R1), Described first resistance (R1) is parallel to zero line N's and ground wire E after being serially connected with the first electric capacity (C1) and display lamp (LAMP) again Input.
Conversion voltage-type leakage protecting plug the most according to claim 1, it is characterised in that also include varistor (Ru), Described resistance includes the second resistance (R2) and the 3rd resistance (R3);Described second resistance (R2), the 3rd resistance (R3), the second electric capacity (C2) and permutator (Kv) is sequentially connected in series rear one end and electrically connects with the outfan with one group of opening and closing contact (JK3) on ground wire E, The other end controls pole electrically connect with outfan SCR and the one-way SCR (Q) of fault current supervisory circuit (5) respectively;Described pressure One end of quick resistance (Ru) electrically connects with the series connection point of the second resistance (R2) and the 3rd resistance (R3), and another terminates common GND。
CN201610396623.4A 2016-06-07 2016-06-07 Conversion voltage-type leakage protecting plug CN106169733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610396623.4A CN106169733A (en) 2016-06-07 2016-06-07 Conversion voltage-type leakage protecting plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610396623.4A CN106169733A (en) 2016-06-07 2016-06-07 Conversion voltage-type leakage protecting plug

Publications (1)

Publication Number Publication Date
CN106169733A true CN106169733A (en) 2016-11-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107462804A (en) * 2017-09-26 2017-12-12 捍防(苏州)实业有限公司 A kind of Electrical Safety analytical equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346532A (en) * 2013-07-11 2013-10-09 余姚市嘉荣电子电器有限公司 Electric leakage prevention plug circuit
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
CN104901089A (en) * 2015-05-13 2015-09-09 佛山市顺德区信辉达电子有限公司 Switching voltage type leakage protection plug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346532A (en) * 2013-07-11 2013-10-09 余姚市嘉荣电子电器有限公司 Electric leakage prevention plug circuit
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
CN104901089A (en) * 2015-05-13 2015-09-09 佛山市顺德区信辉达电子有限公司 Switching voltage type leakage protection plug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107462804A (en) * 2017-09-26 2017-12-12 捍防(苏州)实业有限公司 A kind of Electrical Safety analytical equipment

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Application publication date: 20161130