CN105024243A - Leakage protection plug - Google Patents
Leakage protection plug Download PDFInfo
- Publication number
- CN105024243A CN105024243A CN201510449156.2A CN201510449156A CN105024243A CN 105024243 A CN105024243 A CN 105024243A CN 201510449156 A CN201510449156 A CN 201510449156A CN 105024243 A CN105024243 A CN 105024243A
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- Prior art keywords
- amplifying circuit
- ground wire
- controllable silicon
- input
- rectifier bridge
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- Emergency Protection Circuit Devices (AREA)
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Abstract
A leakage protection plug comprises a shell, a plug pin, phase lines, zero lines, ground lines, a zero sequence current transformer, a test loop, an electromagnetic trip and lock device, a first amplification circuit, a second amplification circuit, a first silicon controlled rectifier, a second silicon controlled rectifier, a rectification bridge and a ground line live detection sensor, wherein a secondary winding output end of the zero sequence current transformer is connected with an input end of the first amplification circuit, a secondary winding output end of the ground line live detection sensor is connected with an input end of the second amplification circuit, and trigger output ends of the first amplification circuit and the second amplification circuit are respectively connected with controlled ends of the first silicon controlled rectifier and the second silicon controlled rectifier. The leakage protection plug is high in electrical control reliability, and people are ensured to use power more safely.
Description
Technical field
The present invention relates to Electrical Safety resist technology field, especially relate to a kind of leakage protecting plug.
Background technology
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.But this leakage protecting plug is owing to sharing an amplifying circuit and a controllable silicon, once these section failure shared, leakage protecting plug, thus may initiation potential accident by complete failure.
Summary of the invention
A kind of Electrical Safety is the object of the present invention is to provide to protect more perfect leakage protecting plug.
Technical solution proposed by the invention is such:
A kind of leakage protecting plug, 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 controllable silicon, 1st resistance, 1st amplifying circuit composition, also be provided with rectifier bridge, ground wire electrified detection inductor, 2nd amplifying circuit, 2nd controllable silicon, be connected with the 2nd phase line after one ac input end serial connection solenoid of rectifier bridge, another ac input end of rectifier bridge is connected with the 2nd zero line, 1st resistance one end, 1st controllable silicon anode, 2nd controllable silicon anode is connected with the DC output end positive pole of rectifier bridge, the power end of the 1st resistance other end and the 1st amplifying circuit, the power end of the 2nd amplifying circuit connects, the ground end of the 1st amplifying circuit, the ground end of the 2nd amplifying circuit, 1st controllable silicon negative electrode, 2nd controllable silicon negative electrode is connected with the DC output end negative pole of rectifier bridge, one output of described zero sequence current mutual inductor secondary winding, another output respectively with the 1st input of described 1st amplifying circuit, 2nd input connects, 1st amplifying circuit trigger output end is connected with the 1st SCR control pole, described 2nd ground wire is through ground wire electrified detection inductor, one output of ground wire electrified detection inductor secondary winding, 1st input of another output the respectively with 2nd amplifying circuit, 2nd input connects, 2nd amplifying circuit trigger output end is connected with the 2nd SCR control pole.
Compared with prior art, the present invention has following remarkable result:
Leakage protecting plug of the present invention separately independently can be arranged the fault current and the residual current detected between phase zero line detecting ground wire appearance; make detection between the two, amplify, being driven apart is independent of each other, thus improve the reliability of leakage protecting plug and the Electrical Safety of people.
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 a kind of leakage protecting plug of one embodiment of the invention.
Embodiment
By embodiment below, the present invention is further elaborated.
Shown in Figure 1, a kind of leakage protecting plug, 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 12, electromagnetic trip and locker, this electromagnetic trip and locker are by solenoid 14 and drive circuit thereof, phase line switch contacts 7, zero line switch contacts 8, ground wire switch contacts 9 forms, and the drive circuit of described solenoid 13 is primarily of the 1st controllable silicon 15, 1st resistance 10, 1st amplifying circuit 16 forms, and is also provided with rectifier bridge 14, ground wire electrified detection inductor 18, 2nd amplifying circuit 11, 2nd controllable silicon 27, be connected with the 2nd phase line 4 after an ac input end serial connection solenoid 13 of rectifier bridge 14, another ac input end of rectifier bridge 14 is connected with the 2nd zero line 5, the 1st resistance 10 one end, 1st controllable silicon 15 anode, 2nd controllable silicon 27 anode is connected with the DC output end positive pole of rectifier bridge 14, the power end Vs1 of the 1st resistance 10 other end and the 1st amplifying circuit 16, the power end Vs2 of the 2nd amplifying circuit 11 connects, the ground end GND1 of the 1st amplifying circuit 16, the ground end GND2 of the 2nd amplifying circuit 11, 1st controllable silicon 15 negative electrode, 2nd controllable silicon 27 negative electrode is connected with the DC output end negative pole of rectifier bridge 14, an output of described zero sequence current mutual inductor 17 secondary winding, another output respectively with the 1st input 16-1 of described 1st amplifying circuit 16, 2nd input 16-2 connects, and the 1st amplifying circuit 16 trigger output end controls pole with the 1st controllable silicon 15 and is connected, and described 2nd ground wire 6 passes ground wire electrified detection inductor 18, an output of ground wire electrified detection inductor 18 secondary winding, 1st input 11-1 of another output the respectively with 2nd amplifying circuit 11, 2nd input 11-2 connects, and the 2nd amplifying circuit 11 trigger output end controls pole with the 2nd controllable silicon 27 and is connected.
During use, leakage protecting plug reset key is pressed, the consuming device that the closed connection mains supply of phase line switch contacts 7, zero line switch contacts 8, ground wire switch contacts 9 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 this signal is inputted the 1st input 16-1 and the 2nd input 16-2 of the 1st amplifying circuit 16, when leakage current reaches predetermined threshold values, 1st amplifying circuit 16 outputs signal the conducting of triggering the 1st controllable silicon 15 and solenoid 13 is worked phase line switch contacts 7, zero line switch contacts 8, ground wire switch contacts 9 all disconnected immediately, thus has ensured the Electrical Safety of people.
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 detects the fault current flowing through the 2nd ground wire 6 immediately and signal is sent into the 1st input 11-1 and the 2nd input 11-2 of the 2nd amplifying circuit 11, when the ground wire fault current detected is greater than predetermined current threshold, 2nd amplifying circuit 11 outputs signal the conducting of triggering the 2nd controllable silicon 27 makes solenoid 13 work phase line switch contacts 7, zero line switch contacts 8, ground wire switch contacts 9 all disconnects immediately, thus ensured the Electrical Safety of people better.
Claims (1)
1. a leakage protecting plug, 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 controllable silicon, 1st resistance, 1st amplifying circuit composition, it is characterized in that: be also provided with rectifier bridge, ground wire electrified detection inductor, 2nd amplifying circuit, 2nd controllable silicon, be connected with the 2nd phase line after one ac input end serial connection solenoid of rectifier bridge, another ac input end of rectifier bridge is connected with the 2nd zero line, 1st resistance one end, the 1st controllable silicon anode, the 2nd controllable silicon anode are connected with the DC output end positive pole of rectifier bridge, the 1st resistance other end is connected with the power end of the 1st amplifying circuit, the power end of the 2nd amplifying circuit, and the ground end of the 1st amplifying circuit, the ground end of the 2nd amplifying circuit, the 1st controllable silicon negative electrode, the 2nd controllable silicon negative electrode are connected with the DC output end negative pole of rectifier bridge, one output of described zero sequence current mutual inductor secondary winding, another output are connected with the 1st input of described 1st amplifying circuit, the 2nd input respectively, and the 1st amplifying circuit trigger output end is connected with the 1st SCR control pole, described 2nd ground wire is through ground wire electrified detection inductor, one output of ground wire electrified detection inductor secondary winding, the 1st input of another output the respectively with 2nd amplifying circuit, the 2nd input are connected, and the 2nd amplifying circuit trigger output end is connected with the 2nd SCR control pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449156.2A CN105024243A (en) | 2015-07-28 | 2015-07-28 | Leakage protection plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449156.2A CN105024243A (en) | 2015-07-28 | 2015-07-28 | Leakage protection plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105024243A true CN105024243A (en) | 2015-11-04 |
Family
ID=54414034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510449156.2A Pending CN105024243A (en) | 2015-07-28 | 2015-07-28 | Leakage protection plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105024243A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350352A (en) * | 2001-11-01 | 2002-05-22 | 刘锦泰 | Leakage protection plug |
| US20060198066A1 (en) * | 2005-03-02 | 2006-09-07 | Zhejiang Dongzheng Electrical Co., Ltd | Permanent-magnet ground fault circuit interrupter plug and its permanent-magnet mechanism therein |
| CN102290689A (en) * | 2011-06-23 | 2011-12-21 | 刘睿刚 | Earth leakage protection plug |
| CN102354863A (en) * | 2011-06-23 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug |
| CN204905586U (en) * | 2015-07-28 | 2015-12-23 | 深圳市良辉科技有限公司 | Electric leakage protection plug |
-
2015
- 2015-07-28 CN CN201510449156.2A patent/CN105024243A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350352A (en) * | 2001-11-01 | 2002-05-22 | 刘锦泰 | Leakage protection plug |
| US20060198066A1 (en) * | 2005-03-02 | 2006-09-07 | Zhejiang Dongzheng Electrical Co., Ltd | Permanent-magnet ground fault circuit interrupter plug and its permanent-magnet mechanism therein |
| CN102290689A (en) * | 2011-06-23 | 2011-12-21 | 刘睿刚 | Earth leakage protection plug |
| CN102354863A (en) * | 2011-06-23 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug |
| CN204905586U (en) * | 2015-07-28 | 2015-12-23 | 深圳市良辉科技有限公司 | Electric leakage protection plug |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151104 |
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| WD01 | Invention patent application deemed withdrawn after publication |