CN203135399U - Electric leakage protector - Google Patents
Electric leakage protector Download PDFInfo
- Publication number
- CN203135399U CN203135399U CN 201320112471 CN201320112471U CN203135399U CN 203135399 U CN203135399 U CN 203135399U CN 201320112471 CN201320112471 CN 201320112471 CN 201320112471 U CN201320112471 U CN 201320112471U CN 203135399 U CN203135399 U CN 203135399U
- Authority
- CN
- China
- Prior art keywords
- earth leakage
- leakage protective
- capacitor
- winding
- resistance
- 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 - Lifetime
Links
Images
Abstract
The utility model relates to an electric leakage protector used for household electric appliances protection. The electric leakage protector of the utility model comprises a live line L, a zero line N and a ground line E, wherein one end of the live line L, one end of the zero line N and one end of the ground line E are connected with a power source, and the other end of the live line L, the other end of the zero line N and the other end of the ground line E are connected with a load, and the ground line E is grounded; the live line L and the zero line N are provided with a switch group, a control circuit and a zero sequence current transformer ZCT; the control circuit comprises an electric leakage protection chip and a peripheral circuit thereof; a first winding and a second winding are wound on the zero sequence current transformer ZCT; the first winding is connected with the live line L, the zero line N and the switch group; the second winding is connected with the control circuit; and two ends of the second winding are connected in parallel with a capacitor C5. The electric leakage protector of the utility model is residual current action protector which is used for households and similar users.
Description
Technical field
The utility model relates to a kind of earth leakage protective device for the household electrical appliance protection.
Background technology
Along with popularizing day by day of household electrical appliance; people are more and more with the chance that electrically contacts; for the user is protected better; now a lot of products have all disposed leakage protecting plug (or steelyard slepsydra non-electricity protector); when electric leakage takes place in the electric equipment that is connected with leakage protecting plug; leakage protecting plug can be cut off the electricity supply within a few tens of milliseconds automatically, the harm that makes the user avoid getting an electric shock, protection user's life security.
In the prior art, just can cut off the electricity supply its back loading is protected thereby leakage protecting plug can only produce residual current and reach set point at this residual current between phase line, the neutral line.When the insulation damages between the phase line that power supply or power consumption equipment occur and the ground wire or wrong cause the situation of ground wire electrification, cause the Electrical Safety accident easily.In addition; RCD (RCD) as family expenses and similar user; country has put into effect accordingly " family expenses and similar user's RCD (RCD) Electro Magnetic Compatibility " standard GB 18499-2008/IEC 61543:1995; but for some reason, test only to desired in the national standard " the common mode conduction interference that is lower than in the 150KHz frequency range in the Electromagnetic Compatibility is tested " for Jue Dabufen earth leakage protective device.And now at more and more stricter test request and the market demand, a lot of producers begin to seek to test the scheme of passing through, but any relevant report is not by experiment arranged up to now.
The utility model content
Therefore; at above-mentioned problem; the utility model proposes a kind of earth leakage protective device; circuit to existing earth leakage protective device improves; the realization creepage protection function of when fortuitous event occurring, in time cutting off the electricity supply; simultaneously can also be by desired in the national standard " the common mode conduction interference that is lower than in the 150KHz frequency range in the Electromagnetic Compatibility be tested ", to solve the deficiency of prior art.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is that a kind of earth leakage protective device comprises an end is connected with power supply, the other end is connected with load live wire L, zero line N and ground wire E; Described ground wire E ground connection; At live wire L and zero line N switches set, control circuit and zero sequence current mutual inductor ZCT are set; Described control circuit comprises earth leakage protective chip and peripheral circuit thereof; Be wound with first winding and second winding on the described zero sequence current mutual inductor ZCT, first winding connects live wire L, zero line N and switches set, and second winding is connected with control circuit, and the two ends shunt capacitance C5 of second winding.
Wherein, the span of capacitor C 5 is 1 μ F-10 μ F.
Further, described switches set comprises button switch K 1, K switch 2, button AJ, resistance R 1, piezo-resistance MOV and tripping coil TK; Described control circuit comprises earth leakage protective chip, resistance R 3, resistance R 4, resistance R 5, thyristor SCR, capacitor C 1, capacitor C 2, capacitor C 3 and polar capacitor C4; Be wound with first winding and second winding on the described zero sequence current mutual inductor ZCT, one end of first winding connects live wire L, and being connected to zero line N by diode D1, resistance R 2 and light-emitting diode D2 successively, the other end of first winding is connected zero line N through button AJ with resistance R 1 successively; The two ends parallel resistance R6 of second winding is connected the Vref pin (the 3rd pin) of earth leakage protective chip and an end of capacitor C 3 with capacitor C 5 end afterwards, and the other end is connected to the VFB pin (the 2nd pin) of earth leakage protective chip through polar capacitor C4; The Rset pin of earth leakage protective chip (the 1st pin) is successively by resistance R 4, resistance R 5 is connected to the Ground pin (the 4th pin) of earth leakage protective chip, one end of the other end of capacitor C 3 and capacitor C 2, the other end of capacitor C 2 connects the C Delay pin (the 8th pin) of earth leakage protective chip, the Line pin of earth leakage protective chip (the 5th pin) is connected to the positive pole of thyristor SCR and the end of tripping coil TK through resistance R 3, the Neutral pin of earth leakage protective chip (the 6th pin) connects the negative pole of thyristor SCR and an end of capacitor C 1, and the SCR Trigger pin (the 7th pin) of earth leakage protective chip connects the control end of thyristor SCR and the other end of capacitor C 1; The other end of tripping coil TK connects an end of button switch K 1, the end of piezo-resistance MOV, and the other end of button switch K 1 connects live wire L, and the other end of piezo-resistance MOV connects an end of K switch 2, and the other end of K switch 2 connects zero line N; The control end of tripping coil TK is connected to live wire L, conducting or the disjunction of control button K switch 1 and K switch 2.
Further, described earth leakage protective chip is to be the low-power consumption double ground fault arc extinguishing chip realization of FM2140 by model.
The utility model improves the circuit of existing earth leakage protective device; the realization creepage protection function of when fortuitous event occurring, in time cutting off the electricity supply; simultaneously set up capacitor C 5 at the output of zero sequence current mutual inductor; the span of capacitor C 5 is 1 μ F-10 μ F; make it can be by desired in the national standard " being lower than in the Electromagnetic Compatibility common mode conduction interference test in the 150KHz frequency range "; solve the problems of the prior art, had good practicability.
Description of drawings
Fig. 1 is the schematic diagram of earth leakage protective device of the present utility model.
Embodiment
Now with embodiment the utility model is further specified by reference to the accompanying drawings.
As a specific embodiment, as shown in Figure 1, a kind of earth leakage protective device of the present utility model comprises an end is connected with power supply, the other end is connected with load live wire L, zero line N and ground wire E; Described ground wire E ground connection; At live wire L and zero line N switches set, control circuit and zero sequence current mutual inductor ZCT are set.Described control circuit comprises earth leakage protective chip and peripheral circuit thereof, and described earth leakage protective chip is to be low-power consumption double ground fault arc extinguishing chip (the Low Power Two-Wire Ground Fault Interrupter) realization of FM2140 by model.Be wound with first winding and second winding on the described zero sequence current mutual inductor ZCT, first winding connects live wire L, zero line N and switches set, and second winding is connected with control circuit, and the two ends shunt capacitance C5 of second winding.Wherein, the span of capacitor C 5 is 1 μ F-10 μ F.
More specifically, described switches set comprises button switch K 1, K switch 2, button AJ, resistance R 1, piezo-resistance MOV and tripping coil TK.Described control circuit comprises earth leakage protective chip FM2140, resistance R 3, resistance R 4, resistance R 5, thyristor SCR, capacitor C 1, capacitor C 2, capacitor C 3 and polar capacitor C4.Be wound with the first winding N1 and the second winding N2 on the described zero sequence current mutual inductor ZCT, the end of the first winding N1 connects live wire L, and being connected to zero line N by diode D1, resistance R 2 and light-emitting diode D2 successively, the other end of the first winding N1 is connected zero line N through button AJ with resistance R 1 successively; The two ends parallel resistance R6 of the second winding N2 is connected the Vref pin (the 3rd pin) of earth leakage protective chip FM2140 and an end of capacitor C 3 with capacitor C 5 end afterwards, and the other end is connected to the VFB pin (the 2nd pin) of earth leakage protective chip FM2140 through polar capacitor C4; The Rset pin of earth leakage protective chip FM2140 (the 1st pin) is successively by resistance R 4, resistance R 5 is connected to the Ground pin (the 4th pin) of earth leakage protective chip FM2140, one end of the other end of capacitor C 3 and capacitor C 2, the C Delay pin (the 8th pin) of earth leakage protective chip FM2140 connects the other end of capacitor C 2, the Line pin of earth leakage protective chip FM2140 (the 5th pin) is connected to the positive pole of thyristor SCR and the end of tripping coil TK through resistance R 3, the Neutral pin of earth leakage protective chip FM2140 (the 6th pin) connects the negative pole of thyristor SCR and an end of capacitor C 1, and the SCR Trigger pin (the 7th pin) of earth leakage protective chip FM2140 connects the control end of thyristor SCR and the other end of capacitor C 1; The other end of tripping coil TK connects an end of button switch K 1, the end of piezo-resistance MOV, and the other end of button switch K 1 connects live wire L, and the other end of piezo-resistance MOV connects an end of K switch 2, and the other end of K switch 2 connects zero line N; The control end of tripping coil TK is connected to live wire L, conducting or the disjunction of control button K switch 1 and K switch 2.
The utility model before the output of zero sequence current mutual inductor ZCT does not add electric capacity C5, in the Electromagnetic Compatibility be lower than in the 150KHz frequency range common mode conduction interference experimental test but, added C5 electric capacity after, this test can be passed through.Present principles figure is not before the zero sequence current mutual inductor output adds C5 electric capacity; can not test by desired in the national standard " the common mode conduction interference that is lower than in the 150KHz frequency range in the Electromagnetic Compatibility is tested "; and after having added C5 electric capacity; filtering because the high-frequency signal that harassing and wrecking tests produces; and then make this test to pass through; after having removed this harassing and wrecking test, can not influence the normal use of earth leakage protective device of the present utility model simultaneously.The utility model has solved the problem that had not solved in the prior art by above-mentioned design cleverly, has simple, the practical advantage of circuit.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (4)
1. earth leakage protective device is characterized in that:
Comprise an end is connected with power supply, the other end is connected with load live wire L, zero line N and ground wire E; Described ground wire E ground connection;
At live wire L and zero line N switches set, control circuit and zero sequence current mutual inductor ZCT are set; Described control circuit comprises earth leakage protective chip and peripheral circuit thereof; Be wound with first winding and second winding on the described zero sequence current mutual inductor ZCT, first winding connects live wire L, zero line N and switches set, and second winding is connected with control circuit, and the two ends shunt capacitance C5 of second winding.
2. a kind of earth leakage protective device according to claim 1, it is characterized in that: the span of described capacitor C 5 is 1 μ F-10 μ F.
3. a kind of earth leakage protective device according to claim 1, it is characterized in that: described switches set comprises button switch K 1, K switch 2, button AJ, resistance R 1, piezo-resistance MOV and tripping coil TK; Described control circuit comprises earth leakage protective chip, resistance R 3, resistance R 4, resistance R 5, thyristor SCR, capacitor C 1, capacitor C 2, capacitor C 3 and polar capacitor C4; Be wound with first winding and second winding on the described zero sequence current mutual inductor ZCT, one end of first winding connects live wire L, and being connected to zero line N by diode D1, resistance R 2 and light-emitting diode D2 successively, the other end of first winding is connected zero line N through button AJ with resistance R 1 successively; The two ends parallel resistance R6 of second winding is connected the Vref pin of earth leakage protective chip and an end of capacitor C 3 with capacitor C 5 end afterwards, and the other end is connected to the VFB pin of earth leakage protective chip through polar capacitor C4; The Rset pin of earth leakage protective chip is successively by resistance R 4, resistance R 5 is connected to the Ground pin of earth leakage protective chip, one end of the other end of capacitor C 3 and capacitor C 2, the other end of capacitor C 2 connects the C Delay pin of earth leakage protective chip, the Line pin of earth leakage protective chip is connected to the positive pole of thyristor SCR and the end of tripping coil TK through resistance R 3, the Neutral pin of earth leakage protective chip connects the negative pole of thyristor SCR and an end of capacitor C 1, and the SCR Trigger pin of earth leakage protective chip connects the control end of thyristor SCR and the other end of capacitor C 1; The other end of tripping coil TK connects an end of button switch K 1, the end of piezo-resistance MOV, and the other end of button switch K 1 connects live wire L, and the other end of piezo-resistance MOV connects an end of K switch 2, and the other end of K switch 2 connects zero line N; The control end of tripping coil TK is connected to live wire L, conducting or the disjunction of control button K switch 1 and K switch 2.
4. a kind of earth leakage protective device according to claim 3 is characterized in that: described earth leakage protective chip is to be that the low-power consumption double ground fault arc extinguishing chip of FM2140 is realized by model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320112471 CN203135399U (en) | 2013-03-11 | 2013-03-11 | Electric leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320112471 CN203135399U (en) | 2013-03-11 | 2013-03-11 | Electric leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203135399U true CN203135399U (en) | 2013-08-14 |
Family
ID=48943339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320112471 Expired - Lifetime CN203135399U (en) | 2013-03-11 | 2013-03-11 | Electric leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203135399U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794425A (en) * | 2014-02-20 | 2014-05-14 | 厦门振泰成科技有限公司 | Electric leakage protection device |
| CN104065033A (en) * | 2014-06-26 | 2014-09-24 | 河南开启电力实业有限公司 | Single-phase power supply electric shock protection device |
| CN105680416A (en) * | 2016-03-22 | 2016-06-15 | 首瑞（天津）电气设备有限公司 | Residual current protector |
| CN105811367A (en) * | 2016-05-06 | 2016-07-27 | 广州市博达电子科技有限公司 | Electric leakage protection wall switch |
-
2013
- 2013-03-11 CN CN 201320112471 patent/CN203135399U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794425A (en) * | 2014-02-20 | 2014-05-14 | 厦门振泰成科技有限公司 | Electric leakage protection device |
| CN103794425B (en) * | 2014-02-20 | 2016-08-24 | 厦门振泰成科技有限公司 | Earth leakage protective device |
| CN104065033A (en) * | 2014-06-26 | 2014-09-24 | 河南开启电力实业有限公司 | Single-phase power supply electric shock protection device |
| CN105680416A (en) * | 2016-03-22 | 2016-06-15 | 首瑞（天津）电气设备有限公司 | Residual current protector |
| CN105680416B (en) * | 2016-03-22 | 2018-05-18 | 首瑞（天津）电气设备有限公司 | Residual current operated protective device |
| CN105811367A (en) * | 2016-05-06 | 2016-07-27 | 广州市博达电子科技有限公司 | Electric leakage protection wall switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201781263U (en) | Electric-shock protection wall overcurrent leakage protection circuit of wall switch | |
| CN202259980U (en) | Plug with ground wire live protection mechanism | |
| CN202905642U (en) | Lightning protection leakage circuit breaker | |
| CN102064522A (en) | Novel leakage protector | |
| CN203135399U (en) | Electric leakage protector | |
| CN203722205U (en) | Overvoltage and electric leakage protection circuit | |
| CN204967236U (en) | Leakage protector | |
| CN202424123U (en) | Electric leakage protector with high-sensitivity ground wire electrification protection function | |
| CN103427394A (en) | Mining flame-proof type selective leakage protector | |
| CN103887660A (en) | Earth leakage protection plug capable of being switched between three-pole mode and two-pole mode | |
| CN104377647A (en) | Electric leakage protection circuit | |
| CN203826704U (en) | Tripolar-and-dipolar mutually switchable earth leakage protection plug | |
| CN204205560U (en) | leakage protection circuit | |
| CN204597453U (en) | Electric prospection switch | |
| CN103066456B (en) | Protective plug capable of checking leakage of electricity | |
| CN201838984U (en) | Electric wiring protection device | |
| CN101179169A (en) | Refrigerator with creepage protection function | |
| CN103474955A (en) | Earth leakage protection plug | |
| CN204205559U (en) | A kind of leakage protection circuit | |
| CN203932969U (en) | A kind of low-voltage leakage protector with over-voltage protecting function | |
| CN202872329U (en) | Circuit breaker with overvoltage protection function | |
| CN202473563U (en) | Overcurrent self-protecting transformer | |
| CN202564702U (en) | Plug with ground wire live protection mechanism | |
| CN203536934U (en) | Electric leakage protection plug | |
| CN201813031U (en) | Protection type plug board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
|
| CX01 | Expiry of patent term |