CN2286537Y - Excess voltage protector for power supply - Google Patents
Excess voltage protector for power supply Download PDFInfo
- Publication number
- CN2286537Y CN2286537Y CN 95200269 CN95200269U CN2286537Y CN 2286537 Y CN2286537 Y CN 2286537Y CN 95200269 CN95200269 CN 95200269 CN 95200269 U CN95200269 U CN 95200269U CN 2286537 Y CN2286537 Y CN 2286537Y
- Authority
- CN
- China
- Prior art keywords
- overvoltage
- power supply
- lightning
- series
- relay
- 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
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an overvoltage protector for a power supply, comprising a first overvoltage absorber element (1V), a series branch which is composed of a second and a third lightning overvoltage absorber element (2V, 3V), the series connection contact of the series branch is connected with an earth terminal (5), and a relay (J) whose coil is connected in series with a voltage limiting element (4V). The branch with overvoltage absorber elements is connected between two input terminals (1, 2), overvoltages caused by phase absence, phase interruption, and phase dislocation and an overvoltage caused by lightning can be absorbed within 8 microseconds, and thereby, the power supply and electric appliances can be reliably protected.
Description
The utility model relates to a kind of overvoltage protection, more particularly, relates to a kind of protective device that is used to prevent overvoltage of power supply.
Existing power supply overvoltage protection device generally has only phase shortage, and phase failure over-voltage protecting function, and complex circuit poor reliability can not prevent because the overvoltage that thunder and lightning causes.
The purpose of this utility model is, a kind of power supply overvoltage protection device is provided, and can prevent the overvoltage that thunder and lightning causes, and circuit is simple, the reliability height.
The purpose of this utility model is achieved in that provides a kind of power supply overvoltage protection device; comprise: be connected across first surge absorption element between two inputs of power supply; across between two inputs of power supply by second; the lightning overvoltage that the 3rd thunder and lightning over-voltage absorption element is in series absorbs branch road; described second; have one on the tie point of the 3rd thunder and lightning over-voltage absorption element for connecting the terminal that ground wire is used; across the branch road that constitutes by relay coil and pressure limiting element connected in series between two inputs of power supply; and when overvoltage takes place, by the warning device of described relay control.
Owing between two inputs of power supply, directly be connected with lightning overvoltage absorber element and other surge absorption element, therefore can directly absorb thunder and lightning overvoltage and other overvoltage of being added on the power line, and speed is fast, for example, can absorb overvoltage in 8 microseconds.
Below in conjunction with description of drawings embodiment of the present utility model.
Fig. 1 is the circuit connection structure figure of the utility model power supply overvoltage protection device.
Fig. 1 is the circuit connection structure figure of power supply overvoltage protection device of the present utility model.Show in detail the annexation between the circuit element of the present utility model among the figure.Among the figure; label 1,2 is represented two input terminals of power supply; the series arm of the series arm of the first surge absorption element 1V and lightning overvoltage absorber element 2V, 3V and the coil of relay J and pressure limiting element 4V is connected across between the power line, and these surge absorption elements can be piezo-resistance or other commercially available overvoltage protection element.Relay J has a normally-closed contact 1J and normally opened contact 2J, is connected on respectively in power supply output loop and the extremely alert loop, and warning device shown in the figure is loud speaker Y.When generating during overvoltage, at first absorb by the 1V in the overvoltage absorption circuit, 2V, 3V, simultaneously by pressure limiting element 4V voltage limit in appropriate value, have electric current to flow through in the relay line chart J this moment.Its normally-closed contact 1J disconnects, and cuts off load circuit, and normally opened contact 2J closure is sent audible alarm, and capacitor C plays the step-down effect.Label 3,4 is an output, is used for connecting load, and label 5 is an earth terminal, and the contact between surge absorption element 2V, the 3V is coupled.All elements are contained in the housing, and housing is not had specific (special) requirements, do not illustrate among the figure.
Claims (2)
1; a kind of electric voltage over press protector; comprise a housing; two input terminals (1 are arranged on the housing; 2); two lead-out terminals (3; 4) and an earth terminal (5); it is characterized in that; first surge absorption element (1V) is housed in the housing; second; the 3rd lightning overvoltage absorber element (2V; series arm 3V); the series arm of the coil of relay (J) and pressure limiting element (4V); they all are connected across two described input terminals (1; 2) between; second; the 3rd lightning overvoltage absorber element (2V; tie point 3V) links to each other with described earth terminal (5); relay (J) has a normally-closed contact (1J) to be connected in the load circuit, also has a normally opened contact (2J) to be connected in the warning circuit.
2, overvoltage protector as claimed in claim 1 is characterized in that, wherein said surge absorption element, lightning overvoltage absorber element and pressure limiting element are piezo-resistances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95200269 CN2286537Y (en) | 1995-03-08 | 1995-03-08 | Excess voltage protector for power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95200269 CN2286537Y (en) | 1995-03-08 | 1995-03-08 | Excess voltage protector for power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2286537Y true CN2286537Y (en) | 1998-07-22 |
Family
ID=33854074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95200269 Expired - Fee Related CN2286537Y (en) | 1995-03-08 | 1995-03-08 | Excess voltage protector for power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2286537Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342610C (en) * | 2000-11-14 | 2007-10-10 | 周义雄 | Circuit for displaying exception of three-phase shock wave absorber |
| CN104009455A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Electric transmission line monitoring system protecting device for lightning protection |
| CN104009460A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Lighting protection device for power transmission line monitoring system |
| CN105391026A (en) * | 2015-12-15 | 2016-03-09 | 尤尼特斯（天津）科技有限公司 | Overvoltage alarm |
-
1995
- 1995-03-08 CN CN 95200269 patent/CN2286537Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342610C (en) * | 2000-11-14 | 2007-10-10 | 周义雄 | Circuit for displaying exception of three-phase shock wave absorber |
| CN104009455A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Electric transmission line monitoring system protecting device for lightning protection |
| CN104009460A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Lighting protection device for power transmission line monitoring system |
| CN105391026A (en) * | 2015-12-15 | 2016-03-09 | 尤尼特斯（天津）科技有限公司 | Overvoltage alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |