CN202373960U - Electric leakage protector - Google Patents
Electric leakage protector Download PDFInfo
- Publication number
- CN202373960U CN202373960U CN2011205332062U CN201120533206U CN202373960U CN 202373960 U CN202373960 U CN 202373960U CN 2011205332062 U CN2011205332062 U CN 2011205332062U CN 201120533206 U CN201120533206 U CN 201120533206U CN 202373960 U CN202373960 U CN 202373960U
- Authority
- CN
- China
- Prior art keywords
- ground wire
- zero line
- zero
- mutual inductor
- sequence current
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an electric leakage protector, which comprises a zero line, a phase line and a ground wire, wherein one end of the zero line is connected with a power supply, the other end of the zero line is connected with a load, a linkage switch, a tripping coil, an amplifying circuit, a silicon controlled rectifier and a zero sequence current mutual inductor are connected onto the zero line, the phase line and the ground wire, the tripping coil controls the linkage switch to act, one end of a primary winding of the zero sequence current mutual inductor is connected to the zero line, the other end of the primary winding of the zero sequence current mutual inductor is connected to the ground wire, a warning circuit is arranged between the zero line and the ground wire and is connected in series with a high-resistance resistor and a neon lamp, a secondary winding of the zero sequence current mutual inductor is connected to the input end of the amplifying circuit, the output end of the amplifying circuit is connected with a triggering electrode of the silicon controlled rectifier, and the silicon controlled rectifier is connected with the tripping coil. The electric leakage protector has the advantages that high voltage resistance is realized, and false warning cannot be generated.
Description
Technical field
This practicality relates to a kind of earth leakage protective device.
Background technology
Existing earth leakage circuit-breaker, like the disclosed a kind of earth leakage protective device of Chinese patent document CN102064522A, it includes an end and is connected with power supply; The zero line that the other end is connected with load, phase line and ground wire are connected with linked switch on zero line, phase line and ground wire, and the tripping coil of control linked switch action; Also include control circuit and zero sequence current mutual inductor; Elementary winding one end of said zero sequence current mutual inductor is connected to zero line, and the other end is connected to ground wire, the secondary winding one end ground connection of said zero sequence current mutual inductor; The other end is connected to the input of control circuit, and the output of control circuit is connected with tripping coil.Though can in time cut off the electricity supply when it provides the situation that a kind of insulation damages or wrong between phase line that power supply or power consumption equipment occur and ground wire cause ground wire electrification; Realize the earth leakage protective device of creepage protection function; But (display circuit of a setting includes series connection light-emitting diode and bidirectional trigger diode together for described zero line of its input and ground wire; This display circuit can not guarantee to tolerate high pressure; When drain voltage is very high, will puncture light-emitting diode and bidirectional trigger diode, thereby the ground wire electric leakage not shown the time and display circuit was lost efficacy; Owing to it still can make lumination of light emitting diode that false alarm takes place on ground during the tape induced voltage, therefore the earth leakage circuit-breaker of this structure can not solve the induced voltage of actual use appearance and the situation of high pressure again.
Also because elementary winding one end of the zero sequence current mutual inductor of this earth leakage protective device is connected to zero line; The other end is connected to ground wire; Or also be connected with bidirectional trigger diode between elementary winding one end and the phase line among its another preferential embodiment; This structure under high pressure bidirectional trigger diode is withstand voltage and very easily damage, and therefore influences the stability and the safety in utilization of product yet.
Summary of the invention
This practical technical problem to be solved is for the above-mentioned deficiency that overcomes prior art a kind of earth leakage protective device to be provided, and makes it more adapt to actual operating position.
This reality solves the problems of the technologies described above the technical scheme that is adopted:
A kind of earth leakage protective device, it comprises that an end is connected with power supply, the zero line that the other end is connected with load; Phase line and ground wire are connected with linked switch on zero line, phase line and ground wire, and the tripping coil of control linked switch action; Amplifying circuit, controllable silicon and zero sequence current mutual inductor; It is characterized in that: elementary winding one end of said zero sequence current mutual inductor is connected to zero line, and the other end is connected to ground wire, between described zero line and ground wire warning circuit is set; Described warning circuit is big resistance resistance and neon lamp series connection; The secondary winding of said zero sequence current mutual inductor is connected to the input of amplifying circuit, and the output of amplifying circuit is connected with the silicon controlled trigger electrode, and controllable silicon is connected with tripping coil.
Also be connected electric capacity between above-mentioned zero line and ground wire.
The elementary winding of above-mentioned zero sequence current mutual inductor links to each other with ground wire with zero line with big resistance resistance series connection back.
Above-mentioned big resistance resistance is generally more than the 2M, can bear high-tension impact fully like this.
Compared with prior art, this practical advantage is:
1, because warning circuit is big resistance resistance and neon lamp, therefore withstand voltage height is not even can damage product when ground tape high pressure occurring yet.
2, owing to be connected electric capacity between zero line and ground wire, also can eliminate even therefore have induced voltage on the ground wire by electric capacity, can prevent mistrip and false alarm.
3, in the elementary winding of zero sequence current mutual inductor big resistance resistance is set, can prevent that ground wire from high pressure occurring and damaging entire product, so fail safe improves greatly.
Description of drawings
Fig. 1 is the circuit structure diagram 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; It comprises an end is connected with power supply, the other end is connected with load zero line N, phase line L and ground wire E, and linked switch 2, rectification circuit 3, control amplifying circuit 4 and zero sequence current mutual inductor ZCT by tripping coil L1 control are set on zero line, phase line and ground wire.
Control amplifying circuit 4 generally is made up of amplifying circuit and peripheral cell, because of more common in leakage switch, is not described in detail at this.Having adopted bridge rectifier D1-D4 in the present embodiment is power supply, and integrated amplifying block IC is as amplifier, and controllable silicon SCR is as controller.
The zero sequence current mutual inductor ZCT that passes phase line L, zero line N also has the hookup of being made up of R2, K1, and this also is the common structure of earth leakage protective device (or steelyard slepsydra electric protective circuit breaker), no longer launches narration at this.
The main improvement of this practicality is: the elementary winding N1 of coiling on said zero sequence current mutual inductor ZCT, and elementary winding N1 one end is connected to zero line N, and the other end is connected to ground wire E.
Also at the corresponding secondary winding N2 of zero sequence current mutual inductor ZCT coiling; Secondary winding N2 two ends are connected to the input of control amplifying circuit 4; The output of control amplifying circuit 4 is connected with tripping coil L1 and controls tripping coil L1, thus the folding of control linked switch 2.
The elementary winding N1 of above-mentioned zero sequence current mutual inductor preferably links to each other with ground wire with zero line with big resistance resistance R 3 series connection backs, and big resistance resistance R 3 resistances are preferably more than the 2M, can bear ground wire like this and the situation of high pressure occur and can not damage entire product.
Between said zero line N and ground wire E warning circuit 1 is set also, said warning circuit 1 is preferably the series connection of big resistance resistance R 1 and neon lamp H.Local tape piezoelectric voltage reaches when neon bulb H lights voltage will light neon bulb H, and the expression ground wire is charged, can warn the user.
Also be connected capacitor C 1 between said zero line N and ground wire E, to eliminate the induced voltage on the ground wire.Capacitor C 1 utilizes alternating current to touch the principle of enough conductings, can eliminate with ground wire E and not go into ground and the induced voltage that on ground wire E, produces, thereby can not be directed at 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 between zero line N and the ground wire E just has electric current to flow through, and secondary coil amplifies after controllable silicon SCR triggering and conducting and make the release tripping operation of threading off, the earth leakage protective device outage through amplifying circuit 4 with regard to inducing voltage.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.
Claims (4)
1. earth leakage protective device, it comprises that an end is connected with power supply, the zero line that the other end is connected with load; Phase line and ground wire are connected with linked switch on zero line, phase line and ground wire, and the tripping coil of control linked switch action; Amplifying circuit, controllable silicon and zero sequence current mutual inductor; It is characterized in that: elementary winding one end of said zero sequence current mutual inductor is connected to zero line, and the other end is connected to ground wire, between described zero line and ground wire warning circuit is set; Described warning circuit is big resistance resistance and neon lamp series connection; The secondary winding of said zero sequence current mutual inductor is connected to the input of amplifying circuit, and the output of amplifying circuit is connected with the silicon controlled trigger electrode, and controllable silicon is connected with tripping coil.
2. earth leakage protective device according to claim 1 is characterized in that: also be connected electric capacity between said zero line and ground wire.
3. earth leakage protective device according to claim 1 and 2 is characterized in that: the elementary winding of said zero sequence current mutual inductor links to each other with ground wire with zero line with big resistance resistance series connection back.
4. earth leakage protective device according to claim 3 is characterized in that: said big resistance resistance is more than the 2M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205332062U CN202373960U (en) | 2011-12-19 | 2011-12-19 | Electric leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205332062U CN202373960U (en) | 2011-12-19 | 2011-12-19 | Electric leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202373960U true CN202373960U (en) | 2012-08-08 |
Family
ID=46597651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205332062U Expired - Fee Related CN202373960U (en) | 2011-12-19 | 2011-12-19 | Electric leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202373960U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403692A (en) * | 2011-12-19 | 2012-04-04 | 钱加灿 | Current leakage protector |
| CN104092184A (en) * | 2014-06-12 | 2014-10-08 | 德力西电气有限公司 | Electricity leakage protection circuit |
-
2011
- 2011-12-19 CN CN2011205332062U patent/CN202373960U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403692A (en) * | 2011-12-19 | 2012-04-04 | 钱加灿 | Current leakage protector |
| CN104092184A (en) * | 2014-06-12 | 2014-10-08 | 德力西电气有限公司 | Electricity leakage protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202259980U (en) | Plug with ground wire live protection mechanism | |
| CN101459302A (en) | All-purpose leakage protection plug for ground wire live trip | |
| CN103346532B (en) | Electric leakage prevention plug circuit | |
| CN203722205U (en) | Overvoltage and electric leakage protection circuit | |
| CN102064522A (en) | Novel leakage protector | |
| CN103872658A (en) | Multifunctional self-recovery over-voltage and under-voltage protector | |
| CN202424123U (en) | Electric leakage protector with high-sensitivity ground wire electrification protection function | |
| CN104577971A (en) | Outage trip protection plug | |
| CN202373960U (en) | Electric leakage protector | |
| CN204465977U (en) | Lightning protection, under-voltage/over-voltage protection street lamp control system | |
| CN104538925A (en) | Earth leakage protection plug with earth wire high voltage detection function | |
| CN202260135U (en) | Medium-high voltage charge indicator applied in switch cabinet | |
| CN202256472U (en) | Intermediate/high-voltage electrified indicator capable of being stable and reliable and also being easy to install and disassemble | |
| CN103794425B (en) | Earth leakage protective device | |
| CN103346443A (en) | Safe earth leakage protection plug giving alarm about earth wire electrification abnormity | |
| CN102818961A (en) | Lightning energy-taking device for lightning arrester monitoring device | |
| CN100576674C (en) | A kind of method and circuit breaker thereof that makes earth leakage protection without action dead region | |
| CN103296639B (en) | A kind of leakage warning and protective circuit | |
| CN203243023U (en) | Leakage alarm and protection circuit | |
| CN102761098A (en) | Device and method for residual current protection | |
| CN102403692A (en) | Current leakage protector | |
| CN205195233U (en) | Power leakage protector | |
| CN203326559U (en) | Electric leakage protection plug circuit | |
| CN204967233U (en) | Low temperature rise security residual current operated circuit breaker circuit | |
| CN201975752U (en) | Leakage protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yuyao Jiarong Electronic Appliance Co., Ltd. Assignor: Qian Jiacan Contract record no.: 2013330000120 Denomination of utility model: Controlling circuit of inleakage protector with life-stop indicator and releaser Granted publication date: 20120808 License type: Exclusive License Record date: 20130503 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20151219 |
|
| EXPY | Termination of patent right or utility model |