CN203326559U - Electric leakage protection plug circuit - Google Patents
Electric leakage protection plug circuit Download PDFInfo
- Publication number
- CN203326559U CN203326559U CN2013204146501U CN201320414650U CN203326559U CN 203326559 U CN203326559 U CN 203326559U CN 2013204146501 U CN2013204146501 U CN 2013204146501U CN 201320414650 U CN201320414650 U CN 201320414650U CN 203326559 U CN203326559 U CN 203326559U
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- China
- Prior art keywords
- circuit
- magnetic induction
- induction loop
- ground wire
- over switch
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an electric leakage protection plug circuit comprising an indicator light circuit, a null wire, an earth wire, a live wire, a tripper, a rectifying circuit, a voltage-dropping circuit, a reverse isolation circuit, an over-temperature detection circuit, a testing circuit, a first resistor, a first magnetic induction coil, a first amplification circuit, a silicon controlled rectifier (SCR), a second magnetic induction coil, a third magnetic induction coil and a second amplification circuit. In the electric leakage protection plug circuit, a change-over switch can be utilized to choose the required type of mutual inductor, so that the defect of tripping error caused by the electrification of the null wire is overcome.
Description
Technical field
The utility model relates to electric security protector device field, particularly a kind of leakage protecting plug circuit.
Background technology
The existing plug with earth wire live protector, as all-purpose leakage protection plug, generally refer to and can disconnect when electric leakage appears in the phase zero line at protective device (plug), while being also included within ground wire electrification, can disconnect, it generally comprises the phase be connected with fixed contact by the movable contact flexure strip, zero, ground three utmost points, through phase, zero sequence current mutual inductor between zero line, test loop, amplifying circuit, rectifier, controllable silicon, release, zero sequence current mutual inductor through ground wire, it is except detecting the load phase, between zero line, have or not outside leakage current, whether also detect ground wire has leakage current to pass through, work as phase line, when zero line or ground wire leakage current occurs respectively or simultaneously, two magnetic test coils all can make release immediately by phase, zero, ground wire all disconnects, cut off the electricity supply, thereby effectively ensured personal safety, therefore oneself is widely applied in household electrical appliance.
But above-mentioned all-purpose leakage protection plug has following two weak points:
When 1, on utilizing ground wire, the voltage detecting instrument transformer detects, the electric current on user's ground wire is very complicated, easily produces induced voltage and causes mistrip.
2, when reality is used, there is the charged situation of zero line in some electric substation, and this electricity is on not impact of electrical equipment, and still on easy triggering ground wire, the voltage detecting instrument transformer detects and causes mistrip.
The utility model content
(1) technical problem that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, carry out the selection of instrument transformer with change over switch, when zero line is not charged, can select ground wire to power on and press the detection instrument transformer to detect, when zero line is with voltage, on ground wire, the voltage detecting instrument transformer may be malfunctioning, and now the user can disconnect voltage detecting instrument transformer on ground wire, selects the current detecting instrument transformer on ground wire to detect.
(2) technical scheme
For addressing the above problem, the utility model proposes a kind of leakage protecting plug circuit, comprise indicator light circuit, zero line, ground wire, live wire, release, rectification circuit, reduction voltage circuit, the reverse isolation circuit, the overtemperature testing circuit, hookup, the first resistance, the first magnetic induction loop, the first amplifying circuit, controllable silicon, also comprise the second magnetic induction loop, the 3rd magnetic induction loop and the second amplifying circuit, secondary output end one end of described the second magnetic induction loop connects described the second amplifying circuit, be provided with the first change over switch between secondary output end one end of the secondary output end other end of described the second magnetic induction loop and described the 3rd magnetic induction loop, and series capacitance between described the first change over switch and described the second amplifying circuit, the two ends of the primary output terminal of described the second magnetic induction loop connect respectively zero line and ground wire, the secondary output end other end of described the 3rd magnetic induction loop connects described release, be provided with the second change over switch between described amplifying circuit and de-mouthpart live wire end, described the first change over switch and described the second change over switch are linked switch.
Further, be provided with the second resistance and the 3rd resistance between described the second change over switch and release live wire end.
Further, be provided with induced voltage between described zero line and ground wire and eliminate circuit.
Further, be provided with the ground wire electrification indicating circuit between described zero line and ground wire.
Further, be provided with the current limliting reduction voltage circuit between described ground wire and described the second magnetic induction loop primary output terminal.
(3) beneficial effect
Compared with prior art, the utlity model has following advantage: utilize change over switch to select the type of required instrument transformer, overcome the charged defect that causes mistrip of zero line.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is leakage protecting plug circuit of the present utility model;
The electrical block diagram that Fig. 2 is leakage protecting plug circuit of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for the utility model is described, but are not used for limiting scope of the present utility model.
A kind of leakage protecting plug circuit as depicted in figs. 1 and 2, comprise indicator light circuit, zero line N, ground wire E, live wire L, release, rectification circuit D1, reduction voltage circuit, the reverse isolation circuit, the overtemperature testing circuit, hookup, the first resistance R 16, the first magnetic induction loop ZCT1, the first amplifying circuit, controllable silicon SCR, wherein, indicator light circuit is by the LED lamp, resistance R 4, resistance R 5, resistance R 6 is composed in series, and reduction voltage circuit is comprised of to resistance R 15 resistance R 10, and the reverse isolation circuit comprises diode D3 and diode D4, prevents the impact of revers voltage on amplifying circuit, and the overtemperature testing circuit is by thermistor RT, resistance R 18, resistance R 19 forms, and hookup is by resistance R 7, resistance R 8, resistance R 9 and button K1 form, and the first amplifying circuit is by amplifier U1, resistance R 17, the first resistance R 16, capacitor C 3 to capacitor C 8 forms, and also comprises the second magnetic induction loop ZCT2, the 3rd magnetic induction loop ZCT3 and the second amplifying circuit, the zero line side of described release and live wire end are respectively through the first magnetic induction loop ZCT1, secondary output end one end of described the second magnetic induction loop ZCT2 connects described the second amplifying circuit, be provided with the first change over switch K2-1 between secondary output end one end of the secondary output end other end of described the second magnetic induction loop ZCT2 and described the 3rd magnetic induction loop ZCT3, and series capacitance C12 between described the first change over switch K2-1 and described the second amplifying circuit, the two ends of the primary output terminal of described the second magnetic induction loop ZCT2 connect respectively zero line N and ground wire E, the secondary output end other end of described the 3rd magnetic induction loop ZCT3 connects described release live wire end, be provided with the second change over switch K2-2 between described amplifying circuit and de-mouthpart live wire end, being provided with described the first change over switch K2-1 of the second resistance R 24 and the 3rd resistance R 25 and described the second change over switch K2-2 between described K2-2 and release is linked switch.When the first change over switch K2-1 connects the second magnetic induction loop ZCT2, the second change over switch K2-2 connects resistance R 24, can respond to ground wire electrification and/or the charged abnormal conditions of zero line simultaneously; When the first change over switch K2-1 connects the 3rd magnetic induction loop ZCT3, the second change over switch K2-2 connects resistance R 24, only respond to the abnormal conditions of ground wire electrification, so just avoided the zero line of individual user family itself just with the defect of certain voltage, can prevent mistrip.
Be provided with the second resistance R 24 and the 3rd resistance R 25 between described the second change over switch K2-2 and release live wire end.
Be provided with induced voltage between described zero line N and ground wire E and eliminate circuit, it is capacitor C 1 that described induced voltage is eliminated circuit.
Be provided with the ground wire electrification indicating circuit between described zero line N and ground wire E, described ground wire electrification indicating circuit is comprised of neon bulb X1 and the resistance R 1 of mutual series connection.
Be provided with dropping resistor R3 as the current limliting reduction voltage circuit between described ground wire E and described the second magnetic induction loop primary output terminal, the resistance of resistance R 3 is mega-ohms.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. a leakage protecting plug circuit, comprise indicator light circuit, zero line, ground wire, live wire, release, rectification circuit, reduction voltage circuit, the reverse isolation circuit, the overtemperature testing circuit, hookup, the first resistance, the first magnetic induction loop, the first amplifying circuit, controllable silicon is characterized in that: also comprise the second magnetic induction loop, the 3rd magnetic induction loop and the second amplifying circuit, secondary output end one end of described the second magnetic induction loop connects described the second amplifying circuit, be provided with the first change over switch between secondary output end one end of the secondary output end other end of described the second magnetic induction loop and described the 3rd magnetic induction loop, and series capacitance between described the first change over switch and described the second amplifying circuit, the two ends of the primary output terminal of described the second magnetic induction loop connect respectively zero line and ground wire, the secondary output end other end of described the 3rd magnetic induction loop connects described release, be provided with the second change over switch between described amplifying circuit and de-mouthpart live wire end, described the first change over switch and described the second change over switch are linked switch.
2. leakage protecting plug circuit according to claim 1, is characterized in that: be provided with the second resistance and the 3rd resistance between described the second change over switch and release live wire end.
3. leakage protecting plug circuit according to claim 2, is characterized in that: be provided with induced voltage between described zero line and ground wire and eliminate circuit.
4. leakage protecting plug circuit according to claim 3, is characterized in that: be provided with the ground wire electrification indicating circuit between described zero line and ground wire.
5. according to the described leakage protecting plug circuit of claim 1 to 4 any one, it is characterized in that: between described ground wire and described the second magnetic induction loop primary output terminal, be provided with the current limliting reduction voltage circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204146501U CN203326559U (en) | 2013-07-11 | 2013-07-11 | Electric leakage protection plug circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204146501U CN203326559U (en) | 2013-07-11 | 2013-07-11 | Electric leakage protection plug circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326559U true CN203326559U (en) | 2013-12-04 |
Family
ID=49665853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204146501U Withdrawn - After Issue CN203326559U (en) | 2013-07-11 | 2013-07-11 | Electric leakage protection plug circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203326559U (en) |
Cited By (2)
| 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 |
| CN104734114A (en) * | 2015-02-25 | 2015-06-24 | 余姚市嘉荣电子电器有限公司 | Optocoupling detection ground wire voltage abnormity and earth leakage protection device |
-
2013
- 2013-07-11 CN CN2013204146501U patent/CN203326559U/en not_active Withdrawn - After Issue
Cited By (3)
| 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 |
| CN103346532B (en) * | 2013-07-11 | 2016-04-13 | 余姚市嘉荣电子电器有限公司 | Electric leakage prevention plug circuit |
| CN104734114A (en) * | 2015-02-25 | 2015-06-24 | 余姚市嘉荣电子电器有限公司 | Optocoupling detection ground wire voltage abnormity and earth leakage protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131204 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |