CN2140575Y - Telecommunication appliance protector - Google Patents
Telecommunication appliance protector Download PDFInfo
- Publication number
- CN2140575Y CN2140575Y CN 92238890 CN92238890U CN2140575Y CN 2140575 Y CN2140575 Y CN 2140575Y CN 92238890 CN92238890 CN 92238890 CN 92238890 U CN92238890 U CN 92238890U CN 2140575 Y CN2140575 Y CN 2140575Y
- Authority
- CN
- China
- Prior art keywords
- interface
- protector
- relay
- voltage
- housing
- 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 appliance protector used for the overvoltage protection in the communication apparatus, comprising a casing body, an internal and an external interfaces, a ground line interface and an alarm circuit or an insertion opening of the alarm circuit. The utility model is characterized in that the protector also comprises an overvoltage protection structure which is composed of a voltage-sensitive resistor and a thermal relay controlled by the voltage-sensitive resistor; the voltage-sensitive resistor sheets are connected with the hot melting or temperature-sensitive devices of the thermal controlled relay directly, which makes the position of the bridge of the normally-closed contact of the relay changed, and thus the wire contacts the ground to switch on the alarm circuit. The protector has the advantages of small decentrality of the parameter, large discharge capacity, good voltage limiting performance and reliable protective property.
Description
The utility model relates to the overvoltage overcurrent protection technology of communication equipment.
Be extensive use of discharge tube in the present telecommunication apparatus of China and carry out overvoltage protection, because this method parameter is dispersed big, discharge capacity is little, and recovery voltage is low, the impulse ignition voltage height, and therefore, its protective value is relatively poor.
The purpose of this utility model is to provide a kind of protector that uses piezo-resistance, and it can be when the overvoltage fault takes place, and makes the automatic ground connection of outside line or opens circuit, and provides alarm signal simultaneously.
The utility model can be realized by the following method.
Described protector; include housing; a pair of inner joint is arranged on this housing; one external interface and a ground connection interface; to the power circuit of inner joint, be in series with overcurrent protective device at external tapping; also can include warning circuit or only on housing, establish the warning circuit interface; it is characterized in that it also includes the overvoltage protection structure that constitutes with piezo-resistance and control thermal relay thereof; two terminal pins of described piezo-resistance are connected with two interior line interfaces respectively, and the neutral point lead-in wire links to each other with the ground connection socket.And its piezoresistive wafer directly links to each other with the hot melt or the temperature-sensitive device of heat controlled relay.
Described piezoresistive wafer can be a slice, also can be formed by the multi-disc serial connection.
Be further described below by embodiment and accompanying drawing.
Fig. 1 is the schematic diagram of a kind of embodiment of the utility model.Among the figure, 1 is housing, and 2,8 is interior line interface, and 3 for being used for the quick fuse of overcurrent protection, and 4,7 is outer line interface, and 5 for connecing the warning circuit interface, and 6 is the bridge-type normally-closed contact in the heat controlled relay, and 9 is piezo-resistance, and 10 is the ground connection interface.
Fig. 2 is a hot melten type relay construction schematic diagram.Among the figure, 11 is piezoresistive wafer, and 12 is low-melting-point metal, and 13 are the compression spring, and 14 is normally opened contact.
In the present embodiment, when outer circuit generation overvoltage fault, piezo-resistance two ends terminal voltage is surpassed just often, when then electric current goes between into ground from neutral point, make the piezoresistive wafer heating up, until low-melting-point metal 12 fusing that are attached thereto, compression spring 13 extends automatically, thereby the bridge that makes normally-closed contact breaks away from former contact and is harmonious with normally opened contact, connect ground wire and warning circuit, thereby make big electric current in the outside line through passing a bridge, connect by another contact and warning circuit simultaneously and send alarm signal directly into ground.
The utility model is applicable to lightning surge and the high electric overvoltage protection of various communication apparatus, compares with the existing protector of discharge tube that uses, and it has the advantages such as parameters decentralization is little, and discharge capacity is big, and the pressure limiting performance is good, and overcurrent overvoltage protection performance is reliable.
Claims (2)
1; a kind of telecommunication apparatus protector; include housing; a pair of interior line interface is arranged on this housing; a pair of outer line interface and an interface of the ground wire; to the power circuit of inner joint, be serially connected with overcurrent protective device at external tapping; also can include warning circuit or only on housing, establish the warning circuit interface; it is characterized in that it also includes the overvoltage protection structure of piezo-resistance and control thermal relay formation thereof; two terminal pins of described piezo-resistance are connected with two inner joints respectively; its neutral point lead-in wire and interface of the ground wire are connected, and its piezoresistive wafer directly links to each other with the hot melt or the temperature-sensitive device of heat controlled relay.
2, protector as claimed in claim 1, two pairs of bridge-type normally-closed contacts that it is characterized in that described heat controlled relay are connected to external tapping to the power circuit of inner joint, a normally opened contact is connected with interface of the ground wire, and another normally opened contact is connected with warning circuit or its interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238890 CN2140575Y (en) | 1992-10-26 | 1992-10-26 | Telecommunication appliance protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238890 CN2140575Y (en) | 1992-10-26 | 1992-10-26 | Telecommunication appliance protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2140575Y true CN2140575Y (en) | 1993-08-18 |
Family
ID=33779777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92238890 Expired - Fee Related CN2140575Y (en) | 1992-10-26 | 1992-10-26 | Telecommunication appliance protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2140575Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052821C (en) * | 1995-06-28 | 2000-05-24 | 浙江万马通信设备厂 | Heat-sensitive self reset device for safety unit |
-
1992
- 1992-10-26 CN CN 92238890 patent/CN2140575Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052821C (en) * | 1995-06-28 | 2000-05-24 | 浙江万马通信设备厂 | Heat-sensitive self reset device for safety unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| 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 |