CN2481034Y - Safety unit for telephone equipment - Google Patents
Safety unit for telephone equipment Download PDFInfo
- Publication number
- CN2481034Y CN2481034Y CN 01239089 CN01239089U CN2481034Y CN 2481034 Y CN2481034 Y CN 2481034Y CN 01239089 CN01239089 CN 01239089 CN 01239089 U CN01239089 U CN 01239089U CN 2481034 Y CN2481034 Y CN 2481034Y
- Authority
- CN
- China
- Prior art keywords
- safety unit
- telephone equipment
- utility
- model
- overvoltage
- 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
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a safety unit for telephone equipment which is arranged on a main distributing frame or box of a telephone equipment. An overcurrent and an overvoltage protection device are connected between each pair of input wire and output wire, meanwhile, a temperature insurance pipe is connected in series. The utility model can prevent the safety unit from burning because of heat accumulation caused by long time electrification, therefore enhancing the protective effect of the safety unit.
Description
The utility model relates to a kind of Security Unit that is arranged on the telephone plant main frame (case).
All be connected with overvoltage, overcurrent protective device in the general Security Unit, when incoming line is subjected to the invasion and attack of outside forceful electric power source, overvoltage, overcurrent protective device action ground connection, protection telephone plant.If can not in time find to cut off outside forceful electric power source,, accumulate for a long time that heat can produce high temperature and play burning though protective device ground connection has electric current to pass through in the Security Unit in the same old way.
The utility model purpose is a kind of telephone plant Security Unit that has overtemperature protection system simultaneously of design.
The utility model is arranged on the telephone plant main frame (case), all is connected with overvoltage, overcurrent protective device between its every pair input, output line, also is in series with temperature safety tube simultaneously between the every pair of input, the output line.
In forceful electric power source when invasion and attack externally,, after overvoltage, the overcurrent protective device action, when the accumulation heat reached uniform temperature, the temperature safety tube fusing loop of cutting off the electricity supply prevented overheated burning.The utility model is simple in structure, increases the protection effect of Security Unit.
Further illustrate the utility model below in conjunction with drawings and Examples.
Accompanying drawing is the circuit structure diagram of embodiment.
As shown in the figure, present embodiment comprises two incoming line a and b and corresponding two output line c and d.Between every pair of input, output line ac or bd, be connected with overvoltage, overcurrent protective device I, between every pair of input, output line ac or bd, also be in series with temperature safety tube W1 or W2 simultaneously.When generating heat to uniform temperature, temperature safety tube W1 or W2 can fuse and cut off the electricity supply, and prevent overheated and burn, the protection telephone plant.In order to improve the protection effect, the temperature safety tube W1 of present embodiment or W2 can be connected between overvoltage, overcurrent protective device I and incoming line a or the b.
Claims (2)
1, a kind of telephone plant Security Unit; be arranged on the telephone plant main frame (case); between its every pair input, output line, all be connected with overvoltage, overcurrent protective device, it is characterized by: also be in series with temperature safety tube simultaneously between the every pair of input, the output line.
2, telephone plant Security Unit according to claim 1, it is characterized by: temperature safety tube is connected between overvoltage, overcurrent protective device and the incoming line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239089 CN2481034Y (en) | 2001-04-25 | 2001-04-25 | Safety unit for telephone equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239089 CN2481034Y (en) | 2001-04-25 | 2001-04-25 | Safety unit for telephone equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2481034Y true CN2481034Y (en) | 2002-03-06 |
Family
ID=33651595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01239089 Expired - Fee Related CN2481034Y (en) | 2001-04-25 | 2001-04-25 | Safety unit for telephone equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2481034Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449901C (en) * | 2005-09-22 | 2009-01-07 | 华为技术有限公司 | Apparatus for preventing equipment internal combustion from drawing outward |
-
2001
- 2001-04-25 CN CN 01239089 patent/CN2481034Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449901C (en) * | 2005-09-22 | 2009-01-07 | 华为技术有限公司 | Apparatus for preventing equipment internal combustion from drawing outward |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Yongshen Document name: Notification of Termination of Patent Right |
|
| 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 |