CN87208813U - Over-voltage protection socket for household electric appliances - Google Patents
Over-voltage protection socket for household electric appliances Download PDFInfo
- Publication number
- CN87208813U CN87208813U CN 87208813 CN87208813U CN87208813U CN 87208813 U CN87208813 U CN 87208813U CN 87208813 CN87208813 CN 87208813 CN 87208813 U CN87208813 U CN 87208813U CN 87208813 U CN87208813 U CN 87208813U
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- CN
- China
- Prior art keywords
- over
- current
- voltage protection
- voltage
- electric appliances
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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.)
- Ceased
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- Emergency Protection Circuit Devices (AREA)
- Fuses (AREA)
Abstract
The utility model discloses an over-voltage protection socket for household electric appliances, belonging to the improvement of the single-phase over-current over-voltage protector. The circuit of the over-voltage protection socket mainly is composed of fuse wires, a voltage-sensitive resistance and a current-limiting resistance. When an accidental case happens, and a single-phase alternating current is changed to a high voltage of 380 volts from 220 volts, the over-voltage protection socket can immediately cut off the current so as to protect the household electric appliances from being damaged. The utility model adopts a multipurpose power socket-type structure, having simple circuit, low cost, safety and practicality.
Description
The utility model belongs to the improvement of single phase alternating current (A.C.) overvoltage protector.
The existing single phase alternating current (A.C.) overvoltage protector control circuits of complexity that adopt, cost is higher more.Zinc-oxide piezoresistor is present comparatively ideal over-voltage protection element, " electroceramics lightning arrester " magazine introduction, and it is being used widely aspect atmosphere overvoltage protection and the operation overvoltage protection.But its through-flow time is the microsecond level, runs into second power frequency overvoltage of level and just can damage.If the powerful high energy pressure cell of research is used for the power frequency overvoltage protection, then cost is too high.The utility model is the existing practical application of piezo-resistance in the single phase alternating current (A.C.) overvoltage protection.
Accompanying drawing is circuit theory diagrams of the present utility model.1. be attaching plug, 2. be fuse, 3. be current-limiting resistance, 4. are piezo-resistances, 5. are power output sockets.
Main points of the present utility model are: be composed in series non-linear pass devices by existing piezo-resistance and current-limiting resistance 1..This device is connected to power output end.Form disposable single phase alternating current (A.C.) overvoltage crowbar.2.220 the volt power supply just often, the approximate open circuit of pass devices.When meeting fortuitous event, 220 volts when becoming 380 volts of high pressure, the piezo-resistance conducting; And because of overheated burning in short-term.Bigger by-pass current makes size fusible circuit, breaker; Output is outage immediately, and the protection home appliance is not damaged.3. current-limiting resistance limits by-pass current, the destruction that the high energy earial drainage when preventing power supply short circuit causes.4. fuse is with melting the glass bulb cartridge fuse soon.5. structure adopts the Multi-purpose power socket form, forms the high voltage protective socket.
The utility model is compared with prior art: 1. the simple cost of circuit is low.With disposable protective circuit protection incident, its ratio of performance to price height.2. current-limiting resistance can guarantee power safety, makes circuit that practicality be arranged.3. common Multi-purpose power socket formula structure is easy to use, promotes easily.
Claims (2)
1, household electrical appliance high voltage protective socket, it is characterized in that adopting disposable single phase alternating current (A.C.) overvoltage crowbar, form the overvoltage protector of Multi-purpose power socket formula structure.
2, the disposable single phase alternating current (A.C.) overvoltage crowbar according to claim 1. is characterized in that adopting existing piezo-resistance and current-limiting resistance to be composed in series non-linear pass devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208813 CN87208813U (en) | 1987-06-04 | 1987-06-04 | Over-voltage protection socket for household electric appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208813 CN87208813U (en) | 1987-06-04 | 1987-06-04 | Over-voltage protection socket for household electric appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87208813U true CN87208813U (en) | 1987-12-31 |
Family
ID=4824019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87208813 Ceased CN87208813U (en) | 1987-06-04 | 1987-06-04 | Over-voltage protection socket for household electric appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87208813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340134A (en) * | 2010-07-14 | 2012-02-01 | 幸亚电子工业股份有限公司 | Circuit system protection device |
-
1987
- 1987-06-04 CN CN 87208813 patent/CN87208813U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340134A (en) * | 2010-07-14 | 2012-02-01 | 幸亚电子工业股份有限公司 | Circuit system protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |