CN2439134Y - Overvoltage protector for main distributing frame protecting unit - Google Patents
Overvoltage protector for main distributing frame protecting unit Download PDFInfo
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- CN2439134Y CN2439134Y CN 00228878 CN00228878U CN2439134Y CN 2439134 Y CN2439134 Y CN 2439134Y CN 00228878 CN00228878 CN 00228878 CN 00228878 U CN00228878 U CN 00228878U CN 2439134 Y CN2439134 Y CN 2439134Y
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- Prior art keywords
- protector
- over
- alarm
- overvoltage
- fail safe
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Abstract
The utility model relates to an overvoltage protector for a main distributing frame safety unit. The utility model is characterized in that an overvoltage branch between an input terminal and an earthing terminal are respectively connected with series loops which are used as high-current protectors (Q1, Q2) and overvoltage protectors (GDT1, GDT2) in a bridge connection mode. When high-current occurs in a circuit, the high-current protectors (Q1, Q2) are fused but the communication line is not broke, fail protectors FS1, FS2 and alarming switch devices K1, K2 approach to the overvoltage protectors GDT1 and GDT2 and are controlled by temperature. When the over the high-current protectors are fused by the process of discharging to the ground by high current, the communication of the line is not interrupted, and because the utility model is only provided with overvoltage protectors, the size is reduced.
Description
The utility model relates to the main frame that uses in the communication line, relates in particular to the overvoltage protector of main frame Security Unit.
At present, the Security Unit of main frame in the communication line, in order to prevent open-circuit line when big electric current endangers, reach the purpose of protection main equipment, common have two kinds of schemes, and a kind of is to adopt big current protection device in the major loop of protection circuit, as adopting fuse or substituting fuse with the thin Copper Foil in the printed board, has overcurrent alarm switch K3, as shown in Figure 1; Another kind is directly to weld fuse in major loop, does not have the overcurrent alarm device, as shown in Figure 2.All be serially connected with over-current protection device R1, R2 in the major loop in two circuit; simultaneously in grounded circuit, all adopted discharge tube as over-voltage protector; and the fail safe device FS1, FS2, K1, the K2 that are subjected to the bypass connection of over-voltage protector discharge tube (GDT1, GDT2) control; like this; when power line snaps on the circuit; because line voltage distribution has surpassed the puncture voltage of discharge tube; discharge tube is breakdown; the heat that produces makes FS1, the fusing of FS2 device; K1, K2 closure, this moment electric current by bypass circuit by the ground of releasing.When line current during at 5A-9A, the heat that the thin Copper Foil of preceding a kind of Security Unit produces can make the printed board charing, and further effect may burn out Security Unit and distributing frame module, and the major loop disconnection can make communication line interrupt; The Security Unit major loop of a kind of mode in back is let out in the ground process at electric current, and FS lost efficacy and also to send alarm signal, and after after a while, because fuse can blow, although can not burn out Security Unit and reach the purpose of protection circuit, communication line can interrupt equally.When line current during greater than 10A; the big current protection device of the Security Unit of dual mode can blow very soon; though protected main equipment; but because the time is short; the heat that discharge tube sends can not make the FS closure; thereby with nowhere to turn to alert signal output, and major loop is off-state, and communication line is interrupted.
If the fuse position is moved on to the branch road of overvoltage protection from major loop, the overcurrent alarm switch is set equally, then can satisfy the requirement that main equipment is protected, be unlikely to burn out module, and has the over-voltage and over-current alarm function, satisfy protection and the Alerting requirements of main frame when there is harm in circuit, but owing to be subjected to the restriction of Distributing frame structure and Access Network volume, in existing Security Unit, above-mentioned over-voltage and over-current alarm structure can't be accomplished in the cellular construction, overvoltage protection and overcurrent protection need be separated, make overvoltage protector and overcurrent protection unit respectively.
Development along with Access Network in communication system (for example FTTC), remote end module, make that the distance of distributing frame in the switching system and communicating terminal may be very short, when existing power line to take on the communication line, because size of current depends on that line resistance is the length of circuit, the situation of above-mentioned big electric current (5A even more than the 10A) therefore just appears in this case probably.
The purpose of this utility model is to provide a kind of overvoltage protector of main frame Security Unit; can effectively overcome in the prior art; the shortcoming that when overvoltage occurring, causes communication line to interrupt; on the other hand; the purpose of this utility model also is to provide a kind of overvoltage protector that can be arranged on outer wire module;, electric current short at line length under the application scenario of big (more than the 5A), still has big current protecting function.
The purpose of this utility model is to realize like this; construct a kind of overvoltage protector of main frame Security Unit; comprise input a; b; output a '; b '; earth terminal E and alarm signal end S; it is characterized in that; at described input a; overvoltage branch road between b and earth terminal E cross-over connection respectively has big current protection device (Q1; Q2) with over-voltage protector (as discharge tube GDT1; GDT2) series loop; also comprise respectively and described over-voltage protector GDT1; the fail safe device FS1 that GDT2 is connected in parallel; FS2; and one end connect earth terminal E; the other end connects two alarm switch device K1 of alarm indicator spare H one end; K2; can make described fail safe device FS1 respectively; the FS2 servo-actuated; the other end of described alarm indicator spare H is connected with the alarm signal end; when arbitrary circuit has big electric current to endanger; big current protection device (Q1; Q2) (as fuse-wires structure) fuses but not interrupt communication circuit; described fail safe device FS1 and alarm switch device K1 are controlled by its temperature near over-voltage protector GDT1, described fail safe device FS2 and alarm switch device K2 are controlled by its temperature near over-voltage protector GDT2.
Overvoltage protector according to the utility model provides is characterized in that, described over-voltage protector GDT1, GDT2 are two utmost point gas discharge tubes, three utmost point gas discharge tube or semiconductor discharge tubes.
Overvoltage protector according to the utility model provides is characterized in that, described fail safe device FS1, FS2 are conductive contact blade-fusible insulating trip-conductive contact blade structure.
Overvoltage protector according to the utility model provides is characterized in that, described alarm switch device K1, K2 are conductive contact blade-fusible insulating trip-conductive contact blade structure.
The purpose of this utility model can also realize like this; construct a kind of overvoltage protector of main frame Security Unit; include input a; b; the printed circuit board (PCB) of earth terminal E and alarm signal end S; cross-over connection has the series loop of big current protection device 10 and over-voltage protector 9 respectively between line input a and b and earth terminal; the fail safe device that also comprises the described over-voltage protector that is connected in parallel respectively; comprise that also an alarm indicator spare 11 is connected between the end and alarm signal end S of described fault alarm switch; two fault alarm switches that between earth terminal and the described alarm indicator spare other end, are connected and install near described over-voltage protector respectively; described fail safe device; the fault alarm switch comprises that heat melts sheet 3; 4; stage clip 5, ground strip 6 and alarm sheet 7.
Overvoltage protector according to the utility model provides is characterized in that, be arranged on each components and parts combination on the described circuit board after, independently be installed in the Security Unit.
Overvoltage protector according to the utility model provides is characterized in that, described big current protection device 10 can be a fuse, and this fuse 10 is set to encircle arcuation, and except that solder joint, fuse does not contact with printed circuit board (PCB).
Overvoltage protector according to the utility model provides is characterized in that, described over-voltage protector 9 can be two utmost point gas discharge tubes, three utmost point gas discharge tube or semiconductor discharge tubes.
Overvoltage protector according to the utility model provides is characterized in that, described alarm indicator spare 11 is a light-emitting diode, and the direction end outwardly.
Overvoltage protector according to the utility model provides is characterized in that, described fail safe alarm switch and the interlock of described fail safe device.
Overvoltage protector according to the utility model provides is characterized in that, described overvoltage alarm device is in parallel with the fail safe device.
Overvoltage protector according to the utility model provides is characterized in that, described fuse, over-voltage protector, fail safe device and fail safe alarm switch respectively are a pair of.
Implement overvoltage protector of the present utility model, have following advantage: on the one hand in the branch road of the overvoltage protection of major loop, big current protection device (for example fuse) is set, in big electric current is released process over the ground during fuse failure, the not communication of disrupted circuit; Owing to only have the overvoltage protection, reduced the overvoltage unit volume greatly on the other hand.
Below in conjunction with drawings and Examples, the utility model is further described, in the accompanying drawing:
Fig. 1 is the circuit theory diagrams of first kind of prior art Security Unit;
Fig. 2 is the circuit theory diagrams of second kind of prior art Security Unit;
Fig. 3 is arranged on the circuit diagram of overvoltage protection branch road for the fuse-wires structure as big current protection device:
Fig. 4 is the circuit diagram of the utility model overvoltage protector;
Fig. 5 is the structural representation of the utility model overvoltage protector.
The circuit of overvoltage protector of the present utility model can see therefrom that as shown in Figure 4 the overvoltage protector of this Security Unit has input a, b, output a ', b ', earth terminal E and alarm signal end S; Between input a and earth terminal E; cross-over connection has as the fuse-wires structure Q1 of big current protection device and the series loop of over-voltage protector GDT1; between input b and earth terminal E; cross-over connection has the series loop of the fuse-wires structure Q2 and the over-voltage protector GDT2 of big current protection device, and Q1 (Q2) can change according to the circuit arrangement is convenient with the relative position of GDT1 (GDT2).Wherein, described fuse-wires structure Q1, Q2 can be fuses, also can be thin copper chaffs, and its effect all is to fuse under big current conditions.Wherein, over-voltage protector GDT1, GDT2 can be two utmost point discharge tubes, three utmost point gas discharge tube or semiconductor discharge tubes, and its effect is that when at its two ends the high pressure that exceeds its rated voltage being arranged, the discharge conducting is also generated heat between two electrodes.As shown in the figure, also be provided with fail safe device FS1, FS2 and be connected in parallel with over-voltage protector GDT1, GDT2 respectively, be provided with alarm switch device K1, K2 and fail safe device FS1, FS2 interlock in addition.Wherein, fail safe device FS1, FS2 are a kind of like this devices, and when its temperature reached regulation numerical value, this device was just with the permanent inefficacy of two-terminal short circuit mode; because fail safe device is herein installed near GDT, promptly the heat that produces as GDT makes it to lose efficacy and can realize short circuit over the ground.Wherein, the alarm switch device K1, the K2 that are serially connected in the alarm loop are a kind of like this devices, when its temperature reaches regulation numerical value, these device two ends start alarm with regard to short circuit, this alarm switch device K1, K2 install near GDT, promptly the heat that produces as GDT makes it to lose efficacy and can realize connecting the alarm return circuit, and alarm loop described herein is meant between earth terminal E and alarm signal end S and near described alarm signal end S and is provided with alarm indicator spare H; Adopt the overvoltage protector of such layout circuit, just can realize when a circuit has the harm of big electric current, fuse failure but the function of not interrupt communication circuit.
The structure of overvoltage protector of the present utility model comprises following device on the circuit board of printed circuit board (PCB) and installation as shown in Figure 5:
1) big current protection device (Q1 in the corresponding diagram 4, Q2) can adopt fuse-wires structure, promptly directly with the thin copper chaff in fuse or the printed board, is used under big current conditions grounded circuit being disconnected;
2) fail safe device, (FS1 in the corresponding diagram 4, FS2) is connected in the over-voltage protector two ends respectively in parallel, is used under overpressure situation its short circuit.
3) fail safe alarm switch (K1, K2 in the corresponding diagram 4) is used for occurring connecting the alarm loop when overvoltage causes big electric current to alarm situation;
4) over-voltage protector 9 (GDT1, GDT2 among Fig. 4) is used for when overvoltage instantaneous conducting and the heat that sends makes FS1, FS2, K1, K2 closure.
5) alarm indicator spare 11 (H in the corresponding diagram 4) can be a light-emitting diode, is used for when overpressure situation occurring, produces alarm signal by the control of fail safe alarm switch.
Wherein, between signal input part a, b and earth terminal E, be connected with the series loop of over-voltage protector Q1, Q2 and fail safe device GDT1, GDT2 respectively; fail safe alarm switch and described fail safe device are all installed near over-voltage protector and are made it interlock; promptly start fail safe device, the action of fail safe alarm switch by discharge tube; in Fig. 5; fail safe alarm switch and described fail safe device comprise that heat melts sheet 3,4, stage clip 5, ground strip 6 and alarm sheet 7.Alarm indicator spare 11 is a light-emitting diode, and near connecting described alarm signal end, the direction end is installed outwardly.Owing in the overvoltage branch road, be serially connected with fuse 10 and as the discharge tube 9 of over-voltage protector, fuse 10 is set to encircle arcuation simultaneously, reduces the influence of its heat to circuit board.Fuse, over-voltage protector, fail safe device and fail safe alarm switch respectively are a pair of; Be arranged on the described circuit board after described each components and parts combination, separate, independently be installed in the Security Unit with the overcurrent protection device.
When using above-mentioned overvoltage protector, when overlap joint power line and electric current are when 5A is following in the circuit, the FS fail safe is also sent alarm signal; When line current during at 5A-9A, the fuse in the overvoltage unit can blow, and might send the overvoltage alarm; When electric current during greater than 10A, fuse blows very soon, and the overvoltage unit can not be alarmed, but not interrupt communication.
Claims (10)
1; a kind of overvoltage protector of main frame Security Unit; it is characterized in that; at described input a; overvoltage branch road between b and earth terminal E cross-over connection respectively has as big current protection device and over-voltage protector (GDT1; GDT2) series loop; also comprise respectively and described over-voltage protector GDT1; the fail safe device FS1 that GDT2 is connected in parallel; FS2; and one end connect earth terminal E; the other end connects two alarm switch device K1 of alarm indicator spare H one end; K2; described fail safe device FS1 and alarm switch device K1 are controlled by its temperature near over-voltage protector GDT1, described fail safe device FS2 and alarm switch device K2 are controlled by its temperature near over-voltage protector GDT2.
2, according to the described overvoltage protector of claim 1, it is characterized in that, also comprise alarm indicator spare H, its other end is connected with alarm signal end S.
According to the described overvoltage protector of claim 1, it is characterized in that 3, described over-voltage protector GDT1, GDT2 are two utmost point gas discharge tubes, three utmost point gas discharge tube or semiconductor discharge tubes.
4, according to the described overvoltage protector of claim 1; it is characterized in that; described fail safe device FS1, FS2 are conductive contact blade-fusible insulating trip-conductive contact blade structure,, described alarm switch device K1, K2 are conductive contact blade-fusible insulating trip-conductive contact blade structure.
5; a kind of overvoltage protector of main frame Security Unit; it is characterized in that; include input a; b; the printed circuit board (PCB) of earth terminal E and alarm signal end S; cross-over connection has the series loop of big current protection device 10 and over-voltage protector 9 respectively between line input a and b and earth terminal; the fail safe device that also comprises the described over-voltage protector that is connected in parallel respectively; comprise that also an alarm indicator spare 11 is connected between the end and alarm signal end S of described fault alarm switch; two fault alarm switches that between earth terminal and the described alarm indicator spare other end, are connected and install near described over-voltage protector respectively; described fail safe device; the fault alarm switch comprises that heat melts sheet 3; 4; stage clip 5, ground strip 6 and alarm sheet 7.
6, according to the described overvoltage protector of claim 5, it is characterized in that, be arranged on each components and parts combination on the described circuit board after, independently be installed in the Security Unit.
According to the described overvoltage protector of claim 5, it is characterized in that 7, described big current protection device 10 can be a fuse, this fuse 10 is set to encircle arcuation.
According to the described overvoltage protector of claim 5, it is characterized in that 8, described over-voltage protector 9 can be two utmost point gas discharge tubes, three utmost point gas discharge tube or semiconductor discharge tubes.
According to the described overvoltage protector of claim 5, it is characterized in that 9, described alarm indicator spare 11 is a light-emitting diode, the direction end is installed outwardly.
10, according to the described overvoltage protector of claim 5, it is characterized in that described fail safe alarm switch and the interlock of described fail safe device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228878 CN2439134Y (en) | 2000-07-18 | 2000-07-18 | Overvoltage protector for main distributing frame protecting unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228878 CN2439134Y (en) | 2000-07-18 | 2000-07-18 | Overvoltage protector for main distributing frame protecting unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2439134Y true CN2439134Y (en) | 2001-07-11 |
Family
ID=33592280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00228878 Expired - Lifetime CN2439134Y (en) | 2000-07-18 | 2000-07-18 | Overvoltage protector for main distributing frame protecting unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2439134Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100539342C (en) * | 2004-04-02 | 2009-09-09 | 德恩及索恩两合股份有限公司 | Overvoltage side-discharging device |
| CN102686014A (en) * | 2011-02-04 | 2012-09-19 | 株式会社电装 | Electronic control device including interrrupt wire |
-
2000
- 2000-07-18 CN CN 00228878 patent/CN2439134Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100539342C (en) * | 2004-04-02 | 2009-09-09 | 德恩及索恩两合股份有限公司 | Overvoltage side-discharging device |
| CN102686014A (en) * | 2011-02-04 | 2012-09-19 | 株式会社电装 | Electronic control device including interrrupt wire |
| CN102686014B (en) * | 2011-02-04 | 2015-10-28 | 株式会社电装 | Comprise the electronic-controlled installation of disrupted circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN HUAWEI ELECTRICAL CO., LTD. Free format text: FORMER NAME OR ADDRESS: HUAWEI ELECTRIC TECHNOLOGY CO LTD, SHENZHEN CITY |
|
| CP03 | Change of name, title or address |
Address after: Contact man, HUAWEI production center, industrial zone, Longgang District, Guangdong Province: Yue ya Patentee after: Huawei Electric Co., Ltd., Shenzhen Address before: Longgang district production center factory building, third stories, sixth layers, Shenzhen Patentee before: Huawei Electric Technology Co., Ltd., Shenzhen |
|
| ASS | Succession or assignment of patent right |
Owner name: HUAWEI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHENZHEN HUAWEI ELECTRICAL CO., LTD. Effective date: 20040206 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040206 Address after: Zhang Zhongqing, intellectual property department, R & D center, Bantian HUAWEI base, Longgang District, Shenzhen Patentee after: Huawei Technologies Co., Ltd. Address before: Shenzhen HUAWEI production center, industrial zone, Sakamoto District, Shanghai Patentee before: Huawei Electric Co., Ltd., Shenzhen |
|
| CX01 | Expiry of patent term |
Granted publication date: 20010711 |