CN2315696Y

CN2315696Y - Discharge type protector

Info

Publication number: CN2315696Y
Application number: CN 97247839
Authority: CN
Inventors: 石峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-11-25
Filing date: 1997-11-25
Publication date: 1999-04-21
Anticipated expiration: 2007-11-25

Abstract

The utility model relates to a discharge type protector used for protecting lightning strike on a communication circuit, comprising the external line side and the internal line side of a communication line. Discharge tubes are respectively connected between both ends of the external line side and ground. The utility model is characterized in that both ends of the discharge tubes arefurther connected with at least one amplitude limiting clamping discharge tube in parallel. The amplitude limiting clamping discharge tube can adopt a discharge diode or a discharge transistor and can be connected with both ends of the external line side or both ends of the internal line side.

Description

The discharge type protector

The utility model relates to anti-lightning strike used discharge type protector on a kind of communication line.

Rise since the epoch that communication line is arranged, the discharge type protector has just been arranged, develop into today, existing over half a century, discharge tube variety variations of discharge type protector is a lot of during this, develops into modern pottery inflation discharge diode, triode by carbon discharge tube, cupric oxide discharge tube, glass tube gas-discharge tube, the crystal discharge diode, the solid discharge diode, zinc oxide discharge diode etc., but the line construction of discharge type protector is then keeping ancient mode always.See Fig. 1,2 as the overcurrent-overvoltage discharge type protectors outside a large amount of drawing of using at present.Among Fig. 1; arbitrary outside line side ends A, B all are connected to discharge diode 1,2 over the ground what link to each other with telecommunication cable; in outside line side ends A, B to the interior lines side ends A that links to each other with user communication device ', be serially connected with fuse (or thermistor) 3,4 separately between the B ' respectively; like this as outside line side A, when there is Lightning Over-voltage at the B two ends; discharge diode 1,2 discharges over the ground; the overcurrent of being struck by lightning is simultaneously contained by fuse (or thermistor) 3,4, thereby is played the effect of protecting communication equipment.Among Fig. 2, between the outside line side ends A that links to each other with telecommunication cable, B, be connected to discharge triode 5, the centre pin ground connection of this triode 5, also be equivalent to A, B two ends and all be connected to discharge tube between over the ground, and outside line side ends A, B and interior lines side ends A ', among the B ', also be serially connected with fuse (or thermistor) 3,4 between its A, the A ' and between B, the B ' respectively, its operation principle is same as described above, and the discharge triode also has one to having the effect of certain lightning voltage amplitude limit between outside line side A, the B for discharge diode.A large amount of at present indoor overvoltage discharge type protector such as Fig. 3,4 that use, their line construction and operation principle are basic identical with Fig. 1, Fig. 2 respectively, just all connecing fuse (or thermistor) 3,4 less between outside line side A and the interior lines side A ' and between outside line side B and the interior lines side B ', this is because the little cause of probability that indoor communications equipment is struck by lightning.Above-mentionedly draw outer or all there is the too poor problem of security personnel's effect in indoor discharge type protector line construction, because discharge diode on outside line side A, the B or discharge triode discharge over the ground simultaneously, can between A, B line, still have voltage difference, cause defective communication equipment.Perhaps in earth potential when counterattack, arranged, still can be because of voltage difference defective communication equipment is arranged between A, the B line.Therefore, at present by thunderbolt and earth potential counterattack and the phenomenon of defective communication equipment is still very serious.Although the thunderbolt voltage between 5 couples of A of above-mentioned discharge triode, the B line has certain amplitude limit effect, its amplitude limit speed is too slow, and amplitude limit value is higher, can not satisfy the anti-lightning strike requirement of present communication equipment.

The purpose of this utility model is exactly in order to address the above problem, and provides a kind of security personnel effective, can eliminate arbitrary discharge type protector to Lightning Over-voltage between the communication line.

Technical solution of the present utility model:

A kind of discharge type protector, it includes order wire outside line side A, B and interior lines side A ', B ', is connected to discharge tube at A, B respectively between over the ground, it is characterized in that at the two ends of described order wire either side and connects at least one amplitude limit clamp discharge tube.

The utility model first on traditional discharge type protector circuit again and connect at least one discharge diode or the discharge triode, make when between a pair of order wire A in office, the B Lightning Over-voltage being arranged, itself and the discharge tube that connects can give amplitude limit and clamp to the thunderbolt voltage between A, the B, thereby guarantee that no overvoltage seals in communication equipment on A, the B order wire, security personnel's efficient improves greatly, and the communication equipment spoilage reduces greatly.The utility model line construction is simple, and cost is low, and security personnel's effect is very good.

Fig. 1 is the existing outer formula discharge diode protector schematic diagram that draws;

Fig. 2 is the existing outer formula discharge triode protector schematic diagram that draws;

Fig. 3 is existing indoor formula discharge diode protector schematic diagram;

Fig. 4 is existing indoor formula discharge triode protector schematic diagram;

Fig. 5 is that the utility model draws outer formula discharge diode protector schematic diagram;

Fig. 6 is that the utility model draws outer formula discharge triode protector schematic diagram;

Fig. 7 is the indoor formula discharge diode of a utility model protector schematic diagram;

Fig. 8 is the indoor formula discharge of a utility model triode protector schematic diagram.

Protector of the present utility model, draw outer formula and indoor formula no matter be, all include the order wire interior lines side A ', the B ' that are used to meet order wire outside line side A, the B of order wire and are used to connect letter equipment, all be connected to discharge tube at A, B between over the ground, as discharge diode or discharge triode, at the two ends of this discharge tube at least again and connect an amplitude limit clamp discharge tube, this amplitude limit clamp discharge tube can be a discharge diode, triode also discharges, it can be connected on outside line side A, B two ends, also can be connected on interior lines side A ', B ' two ends, its effect is identical.Specific embodiment is as follows.

Fig. 5 is the schematic diagram that the utility model draws the discharge diode protector of outer formula, be connected to discharge diode 1,2 at outside line side A, B respectively between over the ground, be serially connected with fuse (or thermistor) 3,4 respectively between outside line side A and the interior lines side A ' and between outside line side B and the interior lines side B ', between interior lines side A ', B ' two ends, be connected to amplitude limit clamp discharge diode 6 (perhaps connecing amplitude limit clamp discharge triode), this diode 6 also can be connected between outside line side A, the B two ends, itself and to connect number can be one, also two.Like this when the generation Lightning Over-voltage is added between order wire A, the B, then 1,2 pairs of Lightning Over-voltage of discharge diode are discharged, 3,4 pairs of thunderbolts of fuse (or thermistor) overcurrent is contained, 6 pairs of Lightning Over-voltage of amplitude limit clamp discharge diode are carried out the amplitude limit clamp simultaneously, making potential difference between order wire A, the B be limited is clamped on the safe voltage value, so guaranteed that Lightning Over-voltage can not seal in communication equipment, has improved security personnel's efficient greatly.

Fig. 6 is the schematic diagram that the utility model draws the discharge triode protector of outer formula, between outside line side A, B, be connected to discharge triode 5, the centre pin ground connection of triode 5, be connected to fuse (or thermistor) 3,4 respectively between outside line side A and the interior lines side A ' and between outside line side B and the interior lines side B ', between interior lines side A ', B ' and be connected to an amplitude limit clamping diode 6 and an amplitude limit clamping transistor 7, the centre pin of triode 7 is ground connection also.Amplitude limit clamping diode 6 and triode 7 also can together be attempted by between outside line side A, the B two ends, and perhaps in them is attempted by between A, the B, and another is attempted by between A ', the B '.Above-mentioned two amplitude limit clamp discharge tubes also can all adopt discharge diode, perhaps all adopt the discharge triode.

Fig. 7 is the schematic diagram of the indoor formula discharge diode of the utility model protector, its outside line side A, B are connected to discharge diode 1,2 respectively between over the ground, between interior lines side A ', B ', be connected to amplitude limit clamping diode 6, perhaps adopt the amplitude limit clamping transistor also can, above-mentioned diode 6 also can be connected between outside line side A, the B.

Fig. 8 is the schematic diagram of the indoor formula discharge of the utility model triode protector, be connected to discharge triode 5 between its outside line side A, the B, the centre pin ground connection of triode 5, at outside line side A, B two ends and interior lines side A ', B ' two ends all and be connected to an amplitude limit clamping diode 6, they also can be installed in the same side, perhaps adopt the amplitude limit clamping transistor.The operation principle of above-mentioned Fig. 6, Fig. 7, each embodiment of Fig. 8 is all identical with Fig. 5, so repeat no more.

Claims

1, a kind of discharge type protector, it includes order wire outside line side A, B and interior lines side A ', B ', is connected to discharge tube at A, B respectively between over the ground, it is characterized in that at the two ends of described order wire either side and connects at least one amplitude limit clamp discharge tube.

2, by the described discharge type protector of claim 1, it is characterized in that described amplitude limit clamp discharge tube can adopt discharge diode, also can adopt the discharge triode, it can be attempted by between outside line side A, the B, also can be attempted by between interior lines side A ', the B '.