CN203932969U - A kind of low-voltage leakage protector with over-voltage protecting function - Google Patents
A kind of low-voltage leakage protector with over-voltage protecting function Download PDFInfo
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- CN203932969U CN203932969U CN201420210449.6U CN201420210449U CN203932969U CN 203932969 U CN203932969 U CN 203932969U CN 201420210449 U CN201420210449 U CN 201420210449U CN 203932969 U CN203932969 U CN 203932969U
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- 230000001012 protector Effects 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Abstract
The utility model discloses a kind of low-voltage leakage protector with over-voltage protecting function; comprise in low-voltage leakage protector and low-voltage leakage protector and produce the experiment button in loop for being communicated with simulation leakage current; node at experiment button two ends is in parallel for being communicated with the electronic switch in simulation leakage current generation loop; also comprise the over-voltage detection circuit between the node that is parallel to experiment button two ends; in the time that the input voltage of low-voltage leakage protector transfinites, over-voltage detection circuit output is greater than the voltage control electronic switch conducting of electronic switch threshold value.The utility model can be realized over-voltage protecting function, the feature such as have reliable operation, circuit structure is simple, and cost of manufacture is low, use is safe.
Description
Technical field
The present invention relates to a kind of low-voltage protective switch, especially a kind of low-voltage leakage protector.
Background technology
The low-voltage leakage protection switch using at present, only has overcurrent and creepage protection function, there is no over-voltage protecting function.On low-voltage lighting circuit, occur that overvoltage phenomenon (for example: 1, in replacing transformer low voltage side bus mistake, zero line is connected into live wire; 2, zero line due to overcurrent or loose contact is blown and Lightning Over-voltage etc.) will burn in a large number household electrical appliance, not only cause very large economic loss to user but also cause user and electric power enterprise electricity consumption dispute.
Summary of the invention
The features such as the technical problem to be solved in the present invention is to provide a kind of low-voltage leakage protector with over-voltage protecting function, and the present invention has reliable operation, circuit structure is simple, and cost of manufacture is low, use is safe.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of low-voltage leakage protector with over-voltage protecting function; comprise in low-voltage leakage protector and low-voltage leakage protector and produce the experiment button in loop for being communicated with simulation leakage current; node at experiment button two ends is in parallel for being communicated with the electronic switch in simulation leakage current generation loop; also comprise the over-voltage detection circuit between the node that is parallel to experiment button two ends; in the time that the input voltage of low-voltage leakage protector transfinites, over-voltage detection circuit output is greater than the voltage control electronic switch conducting of electronic switch threshold value.
The present invention further improves and is:
The electronic valve device of electronic switch is bidirectional triode thyristor Q1; Over-voltage detection circuit is the resitstance voltage divider being composed in series by resistance R 1 and resistance R 2, and resistance R 1 is positioned at cold end, and the component voltage in resistance R 1 exports the control utmost point of bidirectional triode thyristor Q1 to.
The preferred adjustable resistance of resistance R 1.
1 liang of end node shunt capacitance C1 of resistance R.
The beneficial effect that adopts technique scheme to produce is:
A kind of low-voltage leakage protector with over-voltage protecting function provided by the invention; detect earth leakage protective device input voltage by over-voltage detection circuit and whether transfinite to control electronic switch break-make; thereby control simulation leakage current produces the path in loop and open circuit (disconnection and the closure that are equivalent to test button); in the time that input voltage transfinites; earth leakage protective device tripping operation is cut off the electricity supply, and has played overvoltage protection effect.The features such as the present invention has reliable operation, circuit structure is simple, and cost of manufacture is low, use is safe.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present invention.
Embodiment
Embodiment is as shown in Figure 1 known; the present embodiment comprises in low-voltage leakage protector and low-voltage leakage protector for being communicated with the experiment button in simulation leakage current generation loop; node at experiment button two ends is in parallel for being communicated with the electronic switch in simulation leakage current generation loop; also comprise the over-voltage detection circuit between the node that is parallel to experiment button two ends; in the time that the input voltage of low-voltage leakage protector transfinites, over-voltage detection circuit output is greater than the voltage control electronic switch conducting of electronic switch threshold value.
In the present embodiment, the electronic valve device of electronic switch is bidirectional triode thyristor Q1; Over-voltage detection circuit is the resitstance voltage divider being composed in series by resistance R 1 and resistance R 2, and resistance R 1 is positioned at cold end, and the component voltage in resistance R 1 exports the control utmost point of bidirectional triode thyristor Q1 to.
In the present embodiment, resistance R 1 is adjustable resistance.
1 liang of end node shunt capacitance C1 of resistance R in the present embodiment.
Operation principle:
Form overvoltage protection part by bidirectional triode thyristor Q1, adjustable resistance R1, resistance R 2, capacitor C 1.Be connected in parallel on former earth leakage protective device test button S1 two ends (test button S1 two ends have the voltage equating with earth leakage protective device input before not pressing).In the time that voltage is normal by falling undertension on adjustable resistance R1 after adjustable resistance R1 and resistance R 2 dividing potential drops (this voltage can be adjusted by R1) to trigger Q1 conducting; thereby simulation leakage current generation loop is not affected to (in off state), protector normally moves.The voltage for example, falling on adjustable resistance R1 in the time that (: misphase, neutral line break and thunder and lightning etc.) causes line over-voltage is for a certain reason greater than electronic switch threshold value, is enough to trigger bidirectional triode thyristor Q1 conducting.After bidirectional triode thyristor Q1 conducting, simulate leakage current and produce loop in channel status, be equivalent to press test button S1, protector tripping operation is cut off the electricity supply then, has played overvoltage protection effect.
Claims (4)
1. one kind has the low-voltage leakage protector of over-voltage protecting function; comprise in low-voltage leakage protector and low-voltage leakage protector and produce the experiment button in loop for being communicated with simulation leakage current; it is characterized in that: the node at described experiment button two ends is in parallel for being communicated with the electronic switch in simulation leakage current generation loop; also comprise the over-voltage detection circuit between the node that is parallel to experiment button two ends; in the time that the input voltage of low-voltage leakage protector transfinites, described over-voltage detection circuit output is greater than the voltage control electronic switch conducting of electronic switch threshold value.
2. a kind of low-voltage leakage protector with over-voltage protecting function according to claim 1, the electronic valve device that it is characterized in that described electronic switch is bidirectional triode thyristor Q1; Described over-voltage detection circuit is the resitstance voltage divider being composed in series by resistance R 1 and resistance R 2, and described resistance R 1 is positioned at cold end, and the component voltage in described resistance R 1 exports the control utmost point of bidirectional triode thyristor Q1 to.
3. a kind of low-voltage leakage protector with over-voltage protecting function according to claim 2, is characterized in that described resistance R 1 is adjustable resistance.
4. according to a kind of low-voltage leakage protector with over-voltage protecting function described in claim 2 or 3, it is characterized in that 1 liang of end node shunt capacitance C1 of described resistance R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420210449.6U CN203932969U (en) | 2014-04-28 | 2014-04-28 | A kind of low-voltage leakage protector with over-voltage protecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420210449.6U CN203932969U (en) | 2014-04-28 | 2014-04-28 | A kind of low-voltage leakage protector with over-voltage protecting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203932969U true CN203932969U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420210449.6U Expired - Fee Related CN203932969U (en) | 2014-04-28 | 2014-04-28 | A kind of low-voltage leakage protector with over-voltage protecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203932969U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997017A (en) * | 2014-04-28 | 2014-08-20 | 国家电网公司 | Low-voltage leakage protector with overvoltage protection function |
| CN110247369A (en) * | 2018-03-08 | 2019-09-17 | 河南许继仪表有限公司 | A kind of earth leakage protective device with over-voltage protection function |
-
2014
- 2014-04-28 CN CN201420210449.6U patent/CN203932969U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997017A (en) * | 2014-04-28 | 2014-08-20 | 国家电网公司 | Low-voltage leakage protector with overvoltage protection function |
| CN110247369A (en) * | 2018-03-08 | 2019-09-17 | 河南许继仪表有限公司 | A kind of earth leakage protective device with over-voltage protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150428 |
|
| EXPY | Termination of patent right or utility model |