CN202424123U - Electric leakage protector with high-sensitivity ground wire electrification protection function - Google Patents
Electric leakage protector with high-sensitivity ground wire electrification protection function Download PDFInfo
- Publication number
- CN202424123U CN202424123U CN2012200139684U CN201220013968U CN202424123U CN 202424123 U CN202424123 U CN 202424123U CN 2012200139684 U CN2012200139684 U CN 2012200139684U CN 201220013968 U CN201220013968 U CN 201220013968U CN 202424123 U CN202424123 U CN 202424123U
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- Prior art keywords
- ground wire
- transformer
- protective device
- highly sensitive
- leakage protective
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- 230000001012 protector Effects 0.000 title abstract 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052754 neon Inorganic materials 0.000 claims description 11
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
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Abstract
The utility model provides an electric leakage protector with a high-sensitivity ground wire electrification protection function. The electric leakage protector comprises three electrodes provided with a switch respectively, including a phase line L, a zero line N and a ground wire E, a zero sequence current mutual inductor penetrating through the phase line L and the zero line N, a testing circuit, a release device, a rectification circuit, power voltage reduction and controlled silicon. The electric leakage protector is characterized by further comprising a transformer and a double-input end amplifier, wherein one end of a primary coil of the transformer is connected with the ground wire E, the other end of the primary coil of the transformer is connected with a large-resistance current-limiting voltage-reducing circuit in series and then connected with the zero line N, a secondary coil of the transformer is connected with the input end of the amplifier, the output end of the double-input end amplifier is connected with a triggering electrode of the controlled silicon, and the output end of the zero sequence current mutual inductor accesses the other input end of the double-input end amplifier. According to the electric leakage protector, the electrification tripping voltage of the ground wire can be guaranteed to be not higher than the safety voltage, the false operation and the false alarm can be avoided, and the electric leakage protector is simple in structure.
Description
Technical field
This practicality relates to the protective device that a kind of ground wire electrification is pressed.
Background technology
The device of existing band earth wire charged protecting; Like all-purpose leakage protection plug; Generally be meant and break off when electric leakage appears in the phase zero line at protective device (plug); Can break off when being also included within ground wire electrification, comprise as the one of which phase, zero that connects by movable contact flexure strip and fixed contact, three utmost points, pass zero sequence current mutual inductor, test loop, rectifier, controllable silicon, release between phase, the zero line, pass the zero sequence current mutual inductor of ground wire, it has or not the leakage current except detecting between load phase, the zero line; Whether also detect ground wire has leakage current to pass through; When phase line, zero line or ground wire leakage current occurred respectively or simultaneously, two magnetic test coils all can make release immediately phase, zero, ground wire all broken off, and promptly cut off the electricity supply; Thereby ensured personal safety effectively, therefore in household electrical appliance, obtained extensive use.
In order to strengthen fail safe, the validity that all-purpose leakage protection plug prevents ground wire electrification; The applicant has developed the all-purpose leakage protection plug of multiple ground wire live trip in succession, has increased the ground wire electrification warning circuit, and the detection mode through multiple detection ground wire electrification is cooperating of neon lamp and light-sensitive element for example; Can when ground wire electrification, can produce warning; The prompting user takes measures, and stops using electrical equipment, thereby has further improved the security performance of leakage protecting plug.
But the also talented following weak point of above-mentioned all-purpose leakage protection plug: when 1, ZCT detected electric current on utilizing ground wire, the electric current on user's ground wire was very complicated, easily and produce electric current between the earth and cause mistrip.
2, cooperate with light-sensitive element when detecting ground wire voltage when neon lamp, the starting voltage of neon lamp is more than the 70V, thus can't be in safe voltage trip protection.
Summary of the invention
This practical technical problem to be solved is to overcome the above-mentioned defective of prior art and a kind of earth leakage protective device with highly sensitive earth wire charged protecting is provided, and it can be cut off the electricity supply rapidly when ground wire electrification exceeds safe voltage.
This practicality solves the problems of the technologies described above the technical scheme that is adopted:
A kind of earth leakage protective device with highly sensitive earth wire charged protecting; The phase line L, zero line N, ground wire E three utmost points that comprise each belt switch; Pass zero sequence current mutual inductor, hookup, release, rectification circuit, power supply step-down, the controllable silicon of phase line L, zero line N; It is characterized in that: a transformer and double input end amplifier also are set; Primary coil one end of transformer is connected with ground wire E, transformer the primary coil other end be connected with zero line N after being connected in series big resistance current limliting reduction voltage circuit, the secondary coil of transformer is connected with amplifier input terminal; The output of double input end amplifier is connected with the silicon controlled trigger electrode, and the zero sequence current mutual inductor output inserts another input of double input end amplifier.
Better: the iron core of above-mentioned transformer is an annular, and primary coil is around a side of annular core, and secondary coil like this can be high pressure resistant around the opposite side of annular core.
Better: connect induced voltage between the input of above-mentioned zero line N, ground wire E and eliminate circuit.
Better: connect the ground wire electrification indicating circuit between the input of above-mentioned zero line N, ground wire E.
Compared with prior art, this practical advantage is:
Owing between the input of zero line and ground wire, transformer is set, therefore can guarantees that ground wire live trip voltage is not more than safe voltage.
Also eliminate circuit, prevent because of having induced voltage to make to have the earth leakage protective device misoperation and the false alarm of highly sensitive earth wire charged protecting in the ground wire through between the input of zero line N, ground wire E, connecting induced voltage.
Adopt the double input end amplifier, can the secondary coil of zero sequence current mutual inductor and transformer be inserted in the same amplifier, and can be directed against different leakage currents and amplify, thus can simplified structure, adjust Control Parameter flexibly.
Description of drawings
Fig. 1 is the circuit theory sketch map of this practical embodiment.
Embodiment
Embodiment describes in further detail this practicality below in conjunction with accompanying drawing.
As shown in Figure 1; A kind of earth leakage protective device with highly sensitive earth wire charged protecting; The phase line L, zero line N, ground wire E three utmost points that comprise belt switch S1, S2; Zero sequence current mutual inductor ZCT, hookup R3, AN, release L1, rectification circuit DC, power supply reduction voltage circuit R6, the controllable silicon SCR of passing phase line L, zero line N are original earth leakage protective device circuit, in original leakage protection circuit, increase a transformer ZCT2, double input end amplifier IC, dropping resistor R1, R2, induced voltage elimination capacitor C 1, charged warning neon bulb H.
Two ends behind the primary coil one end serial connection current limliting reduction voltage circuit of transformer ZCT2 are connected with the input of zero line N, ground wire E; The secondary coil of instrument transformer ZCT2 is connected with the input of amplifier IC; R6 is connected with the power supply reduction voltage circuit, and the output of double input end amplifier IC is connected with the trigger electrode of controllable silicon SCR.
Double input end amplifier IC output is connected with the controllable silicon SCR trigger electrode; The secondary coil of shunt capacitance C2, transformer ZCT2 is connected with the input of amplifier IC between controllable silicon trigger electrode and the negative pole, is attempted by the input of zero line N, ground wire E after big resistance resistance R 2 of primary coil one end series connection of transformer ZCT2.
The resistance of above-mentioned resistance R 2 should make circuit satisfy insulating requirements.
The also available electric capacity of above-mentioned resistance R 2 is replaced.
Be connected on after neon bulb H, the current limliting dropping resistor R1 series connection between the input of above-mentioned zero line N, ground wire E as the ground wire electrification indicating circuit; Local tape piezoelectric voltage reaches when neon bulb H lights voltage will light neon bulb H; The expression ground wire is charged, can warn the user.If zero line N and live wire L connect instead; And ground wire E and not exclusively insulation of ground; Also can produce voltage between zero line N, the ground wire E and make earth leakage protective device tripping operation and neon bulb light warning, avoid zero line N and live wire L to connect instead, under wiring normality lack of standardization, make electrical appliance with highly sensitive earth wire charged protecting.
Connect capacitor C 1 between the input of above-mentioned zero line N, ground wire E and do induced voltage elimination circuit; Capacitor C 1 is utilized the principle that alternating current can conducting; The induced voltage that can eliminate ground wire E not go into ground and on ground wire E, produce, thus can not cause mistrip and false alarm.
When ground wire E is charged; Just have voltage between zero line N and the ground wire E; Being connected in the primary coil of the transformer ZCT2 between zero line N and the ground wire E just has electric current to flow through; The secondary coil that ground wire voltage detects instrument transformer ZCT2 can induce voltage and amplify back to controllable silicon SCR trigger electrode through amplifier IC and trigger the controllable silicon conducting and make the release tripping operation of threading off, thereby the earth leakage protective device with highly sensitive earth wire charged protecting is cut off the power supply.Voltage between this moment zero line N and the ground wire E reaches neon bulb H and lights voltage, and the neon bulb H that is connected between zero line N and the ground wire E will be lighted, and representes that ground wire E is charged and reports to the police.
One of the parallel connection of secondary windings of above-mentioned transformer ZCT2 is regulated resistance R 5, regulates resistance R 5 and can change the tripping voltage between zero line N, the ground wire E.
Above-mentioned transformer just makes the release tripping operation through number of turn proportioning first, inferior coil when ground wire voltage surpasses the 36V safe voltage.
Claims (10)
1. the earth leakage protective device that has highly sensitive earth wire charged protecting; The phase line L, zero line N, ground wire E three utmost points that comprise each belt switch; Pass zero sequence current mutual inductor, hookup, release, rectification circuit, power supply step-down, the controllable silicon of phase line L, zero line N; It is characterized in that: a transformer and double input end amplifier also are set; Primary coil one end of transformer is connected with ground wire E, transformer the primary coil other end be connected with zero line N after being connected in series big resistance current limliting reduction voltage circuit, the secondary coil of transformer is connected with amplifier input terminal; The output of double input end amplifier is connected with the silicon controlled trigger electrode, and the zero sequence current mutual inductor output inserts another input of double input end amplifier.
2. the earth leakage protective device with highly sensitive earth wire charged protecting as claimed in claim 1 is characterized in that: described big resistance current limliting reduction voltage circuit is insulation resistance or electric capacity.
3. according to claim 1 or claim 2 the earth leakage protective device with highly sensitive earth wire charged protecting, it is characterized in that: the iron core of described transformer is annular, and primary coil is around a side of annular core, and secondary coil is around the opposite side of annular core.
4. according to claim 1 or claim 2 the earth leakage protective device with highly sensitive earth wire charged protecting is characterized in that: connect induced voltage between the input of described zero line N, ground wire E and eliminate circuit.
5. the earth leakage protective device with highly sensitive earth wire charged protecting as claimed in claim 4 is characterized in that: it is electric capacity that described induced voltage is eliminated circuit.
6. according to claim 1 or claim 2 the earth leakage protective device with highly sensitive earth wire charged protecting is characterized in that: connect the ground wire electrification indicating circuit between the input of described zero line N, ground wire E.
7. the earth leakage protective device with highly sensitive earth wire charged protecting as claimed in claim 6 is characterized in that: described ground wire electrification indicating circuit is that neon bulb is connected with resistance.
8. according to claim 1 or claim 2 the earth leakage protective device with highly sensitive earth wire charged protecting, it is characterized in that: one of the parallel connection of secondary windings of described transformer is regulated resistance.
9. the earth leakage protective device with highly sensitive earth wire charged protecting as claimed in claim 3 is characterized in that: one of the parallel connection of secondary windings of described transformer is regulated resistance.
10. the earth leakage protective device with highly sensitive earth wire charged protecting as claimed in claim 4 is characterized in that: one of the parallel connection of secondary windings of described transformer is regulated resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200139684U CN202424123U (en) | 2012-01-13 | 2012-01-13 | Electric leakage protector with high-sensitivity ground wire electrification protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200139684U CN202424123U (en) | 2012-01-13 | 2012-01-13 | Electric leakage protector with high-sensitivity ground wire electrification protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424123U true CN202424123U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200139684U Expired - Fee Related CN202424123U (en) | 2012-01-13 | 2012-01-13 | Electric leakage protector with high-sensitivity ground wire electrification protection function |
Country Status (1)
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| CN (1) | CN202424123U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066456A (en) * | 2012-11-27 | 2013-04-24 | 钱加灿 | Protective plug capable of checking leakage of electricity |
| CN103178491A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protection device with ground wire electric protection function |
| CN103178492A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protector with electrified earth line protection function |
| CN103187704A (en) * | 2013-03-28 | 2013-07-03 | 余姚市嘉荣电子电器有限公司 | Leakage protection device for preventing electrification of ground wire |
| CN103187705A (en) * | 2013-03-28 | 2013-07-03 | 余姚市嘉荣电子电器有限公司 | Ground wire leakage protection device |
| CN103199489A (en) * | 2013-03-28 | 2013-07-10 | 余姚市嘉荣电子电器有限公司 | Ground wire leakage protection device |
-
2012
- 2012-01-13 CN CN2012200139684U patent/CN202424123U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066456A (en) * | 2012-11-27 | 2013-04-24 | 钱加灿 | Protective plug capable of checking leakage of electricity |
| CN103066456B (en) * | 2012-11-27 | 2014-12-10 | 钱加灿 | Protective plug capable of checking leakage of electricity |
| CN103178491A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protection device with ground wire electric protection function |
| CN103178492A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protector with electrified earth line protection function |
| CN103187704A (en) * | 2013-03-28 | 2013-07-03 | 余姚市嘉荣电子电器有限公司 | Leakage protection device for preventing electrification of ground wire |
| CN103187705A (en) * | 2013-03-28 | 2013-07-03 | 余姚市嘉荣电子电器有限公司 | Ground wire leakage protection device |
| CN103199489A (en) * | 2013-03-28 | 2013-07-10 | 余姚市嘉荣电子电器有限公司 | Ground wire leakage protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YUYAO JIARONG ELECTRONIC + ELECTRIC APPLIANCE CO., Free format text: FORMER OWNER: QIAN JIACAN Effective date: 20131111 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131111 Address after: The 1 District 315463 Zhejiang city of Yuyao Province Lin Shan Zhen Shao Jia Qiu Village No. 78 Patentee after: Yuyao Jiarong Electronic Appliance Co., Ltd. Address before: 315463 Zhejiang city of Ningbo province Yuyao City Lin Shan Zhen Shao Jia Qiu Cun Yuyao Jiarong Electric Co. Ltd. Patentee before: Qian Jiacan |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20200113 |