CN2645314Y

CN2645314Y - Surge protection assembly

Info

Publication number: CN2645314Y
Application number: CN 03250372
Authority: CN
Inventors: 霍建华
Original assignee: CHENGDU KAIRUIDA ELECTRONICS Co Ltd
Current assignee: Shui Ping
Priority date: 2003-09-18
Filing date: 2003-09-18
Publication date: 2004-09-29
Anticipated expiration: 2013-09-18

Abstract

A surge protection assembly belongs to the overvoltage protection device of lightning protection, comprising a pressure sensitive resistor, an elastic electrode, a warning electrode, and a warning circuit, wherein one end of the elastic electrode is connected with one end of the pressure sensitive resistor through low temperature soldering tin, the other end of the elastic electrode is fixed, the elastic electrode is in series used together with the pressure sensitive resistor in the circuit, the warning electrode is arranged on the position corresponding to the elastic electrode restoration state, and the elastic electrode and the warning electrode are taken as a pair of normally open contact of a trigger warning circuit. The utility model has lightning protection function, thermal separation function, deterioration warning function, and reverse protection function.

Description

The surge protection assembly

One, technical field

The utility model relates to a kind of overvoltage protecting device, is the overvoltage protecting device that is used for lightning protection, anti-switching overvoltage specifically.

Two, background technology

Thunder and lightning or switching overvoltage usually cause the badly damaged of electric equipment, so that scrap.Existing surge protection assembly is normal to adopt a varistor to dredge this paroxysmal powerful electric current, avoids the overvoltage infringement of electric equipment.It has the lightning protection function.But, use in the practice and find, when overload operation, this product meeting excessive heating finally causes product short circuit on fire, breaking out of fire; Secondly, when the product deterioration (performance index decline), thunderbolt will cause the breaking-up of protected electric equipment.

Three, utility model content

The purpose of this utility model is the problem that exists at prior art and defective and a kind of surge protection assembly is provided, and it has the lightning protection function, also has heat simultaneously and breaks away from function and deterioration warning function.This novel purpose is achieved in that a kind of surge protection assembly, comprise varistor, warning circuit also has an elastic electrode of connecting and using with described varistor in circuit, one end of elastic electrode is connected with varistor one end through low temperature scolding tin, and the other end is fixed; Also comprise the warning electrode: when it is arranged on the elastic electrode reset mode on the pairing position; Elastic electrode and warning electrode are as a pair of normally opened contact that triggers described warning circuit.From such scheme as seen, under the normal condition, this product is in high-impedance state, does not almost have electric current to flow through (microampere order), and alarm switch (being made up of elastic electrode and warning electrode) is an off-state; When thunder and lightning or the arrival of other switching overvoltages, varistor with nanosecond speed conducting response (＜25ns), the level that too high voltage limit can be born at equipment, to ground, after overvoltage was gone over, this product can revert to high-impedance state again with the lightning current bleed off, the impact of thunder and lightning is next time accepted in preparation, in this course, heat melting device can not move, and alarm switch is always off-state.Longer when line voltage distribution time that raises unusually; amplitude is higher; the ability to bear that has surpassed this product; perhaps when repeatedly the impact of thunder and lightning or switching overvoltage causes this product performance index to drop to a certain degree; under the effect of line voltage distribution; the varistor leakage current increases; the product heating; the low temperature melts soldering tin, elastic electrode breaks away from (being equivalent to thermal cut-off disconnects) from varistor, freely resets; and be overlapped on the warning electrode; the alarm switch closure, thus contingent fire cut off, provide the alarm signal of electric voltage exception or product poor qualityization simultaneously.This novel heat breaks away from function and has avoided the product heating and the drawback of breaking out of fire, and its deterioration warning function makes operating personnel can in time handle and change product, is not damaged with the protection electric equipment.

Four, description of drawings

Fig. 1 is the front view of this novel embodiment (a box body unit block);

Fig. 2 Fig. 3 is respectively upward view and the left view of Fig. 1;

Fig. 4 is the electrical schematic diagram of this novel another embodiment (five box body unit blocks).

Five, embodiment

Fig. 1 Fig. 2 Fig. 3 shows this novel box body unit block, and box body is made up of capping 4 and shell 5 clampings, and varistor 1 is arranged in the interior capping of box body, is fixed with two external electrode terminals 3,10 (metal sheet is made, and is convenient to peg graft use) in the capping; Elastic electrode 6 one ends (are not got rid of other conventional soldered material through low temperature scolding tin, should belong to this novel protected scope) be connected with varistor one end, the other end and external electrode terminal 10 are fixed together (usually, if do not adopt under the above-mentioned box body situation, elastic electrode 6 other ends only fix and get final product, make it can not produce the motion or displacement get final product), the varistor other end is electrically connected with external electrode terminal 3, and warning circuit (can select integrated package for use) is arranged in the box body or is arranged on outer other place of box body; In other words the use of connecting in circuit of elastic electrode and varistor, respectively as two exits, inserts the elastic electrode other end and the varistor other end in the corresponding circuits.When warning electrode 7 is arranged on elastic electrode 6 reset modes on the pairing position, as Fig. 1, the warning electrode is arranged on (warning electrode and elastic electrode are as a pair of normally opened contact that triggers above-mentioned warning circuit) on the corresponding reset position of box body inside and outside shell 5, alarm terminals 9 is fixed in the capping 4, it and

external electrode terminal

3,10 are formed tripod type plug (being used with respective socket), and alarm terminals 9 is electrically connected with warning electrode 7 through alarming line 8.

Mode is preferably, and box body unit block shown in Figure 1 adopts more than two, generally speaking, adopts 2～7 in parallel uses.That is to say,, be electrically connected as an exit mutually, all external electrode terminals 10 are electrically connected mutually,, All Alerts terminal 9 is electrically connected mutually as another exit with all external electrode terminals 3; As shown in Figure 4,5 in parallel uses of box body unit block that is to say, 5 external electrode terminals 3 are electrically connected mutually as an exit T2, and 5 external electrode terminals 10 are electrically connected mutually, as another exit T1,5 alarm terminals are electrically connected mutually; 5 alarm terminals that is to say that 5 warning electrodes (the two is electrically connected through alarming line) form the normally opened contact (the S end is one of them common port) that five couple in parallel triggers warning circuit with 5 elastic electrodes respectively.Fig. 4 illustrates, and varistor and elastic electrode are equivalent to a piezo-resistance θ and connect as a unit block with a fuse RD among Fig. 1 on principle, then, 5 such unit blocks are in parallel again.As main protection component is many varistors.Pairing forms, and thermal cut-off series connection with it is respectively arranged, and forms the varistor and the thermal cut-off protected location of many group series connection, and these protected locations are together in parallel and have formed the overvoltage protection loop then; Every group of all corresponding alarm switch of protected location, when wherein any thermal cut-off moved, actuating mechanism can trigger corresponding alarm switch, thus the alarm signal of providing, a plurality of warnings are opened and are connected in parallel, and have formed alarm circuit.This novel T1, T2 terminal connect between online and the ground.

Existing surge protection assembly is made up of a varistor, and function singleness has only the lightning protection function, does not have heat to break away from function and deterioration warning function, does not also have the backup protection function.

Compared with prior art, this novelly has following features and an advantage:

(1) this series products does not have hot detachment function in the past, and product can generate heat when the product overload operation, finally causes Product short circuit on fire, breaking out of fire; This novel surge protective assembly has hot detachment function, when the product overload operation And adstante febre, hot releasing mechanism can in time be cut off the electricity supply, thereby avoids fire to take place.

(2) existing product mechanism is single, can not provide alarm signal during deterioration, can not in time find and change product, causes the fire generation and causes protected product facility to damage when being struck by lightning next time; And this novel product has warning function, in time provides the deterioration alarm signal in the product deterioration and when breaking away from circuit, thereby equipment is caused damage when reminds people is in time changed product and avoided the next time thunderbolt.

(3) product that in the past used does not have defencive function after damaging, and when next time, thunderbolt arrived, if in time do not change, will cause the damage of equipment like this; And this novel product is owing to be that the multichannel protected location is formed in parallel; when breaking away from circuit after the part deterioration therein; the residue protected location still has defencive function; even after deterioration is reported to the police, fail in time to change product like this; this product still has the certain protection function, can prevent that thunder and lightning from damaging protected equipment.

Claims

1, a kind of surge protection assembly comprises varistor, warning circuit, it is characterized in that, also have an elastic electrode (6) of connecting in circuit and using with described varistor (1), an end of elastic electrode is connected with varistor (1) one end through low temperature scolding tin, and the other end is fixed; Also comprise warning electrode (7): when it is arranged on elastic electrode (6) reset mode on the pairing position; Elastic electrode (6) and a pair of normally opened contact of warning electrode (7) as the described warning circuit of triggering.

2, surge protection assembly according to claim 1 is characterized in that, also has the box body of being made up of shell (5) and capping (4); A box body unit piece is constructed as follows: varistor (1) is arranged in the interior capping (4) of box body; Be fixed with two external electrode terminals (3,10) in the capping (4), the elastic electrode other end and external electrode terminal (10) are fixed together, varistor (1) other end is electrically connected with external electrode terminal (3), and described warning electrode (7) is arranged on the box body inside and outside shell (5); Also be fixed with an alarm terminals (9) in the capping (4), alarm terminals is electrically connected with warning electrode (7) through alarming line (8);

3, surge protection assembly according to claim 2; it is characterized in that; described box body unit block is more than two, and all external electrode terminals (3) are electrically connected mutually as an exit, and all external electrode terminals (10) are electrically connected mutually as another exit.

4, surge protection assembly according to claim 3 is characterized in that, described plural alarm terminals (9) is electrically connected mutually.

5, surge protection assembly according to claim 4 is characterized in that, described box body unit block is 2～7.