CN2132259Y

CN2132259Y - Dry overvoltage absorber

Info

Publication number: CN2132259Y
Application number: CN 92216405
Authority: CN
Inventors: 王春峰; 齐家
Original assignee: JINZHOU POWER CAPACITOR GENERAL FACTORY
Current assignee: JINZHOU POWER CAPACITOR GENERAL FACTORY
Priority date: 1992-07-03
Filing date: 1992-07-03
Publication date: 1993-05-05
Anticipated expiration: 2002-07-03

Abstract

The utility model discloses a dry overvoltage absorber. A resistor and at least one capacitor, which are orderly connected in series, are arranged inside an outer case. The capacitor is a metallized capacitor, and an aluminum layer and medium inside the metallized capacitor form at least two inner capacitors connected in series inside. The resistor is formed by the way that the resistance wire made of constantan is wound on an insulating framework in a non-inductive winding method. The dry overvoltage absorber has advantages of small size, light weight, no pollution, incapability of combustion, high safety level and certain self-healing ability. The dry overvoltage absorber can be used for switch cabinets and high-rise buildings.

Description

Dry overvoltage absorber

The utility model belongs to a kind of essential electronic element, particularly a kind of dry type surge absorber.

Existing surge absorber is resistance, electric capacity separately loading, wherein capacitor is the oil immersion structure, institute takes up space greatly again heavy, and oil seepage phenomena usually takes place, easy catching fire, and the volume of resistor is also big, as seen, existing surge absorber volume is big, Heavy Weight and be prone to seepage oil even the catching fire phenomenon, can not be used for switch cubicle, especially can not be used for skyscraper.In addition, the capacitor in the existing surge absorber is rolled by aluminium foil and medium and forms, and is easily breakdown when operating voltage is too high, causes this surge absorber to damage.

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of volume little, in light weight, pollution-free, does not burn and the dry type surge absorber of self-healing ability is arranged.

The utility model is achieved in that it has a shell of being made by insulating material, a resistor and at least one capacitor and series connection successively therebetween are installed in the enclosure, two lead end is binding post, said capacitor is a metallized capacitor, and the inner capacitor of series connection in the aluminium lamination of metallized capacitor inside and medium constitute at least two, and the shared aluminium lamination of adjacent inner capacitor is as a copolar plate, and said resistor is made of the constantan resistance wire that is wrapped in noninductive winding on the insulation framework.

According to above-mentioned dry type surge absorber, the metal locating clip that is used to install this absorber is installed on described shell.

Because resistor is to be formed by the constantan resistance wire that twines with noninductive winding, promptly reduced its inherent inductance, can reduce its temperature rise again, guarantee that resistor itself and condenser dielectric are not burnt out, particularly capacitor is made of the inner series metallized capacitor, can reduce the spread voltage of capacitor, thereby, its withstand voltage improved; And metallized capacitor itself has self-healing ability.Therefore, this surge absorber have volume little, in light weight, pollution-free, do not burn and have certain self-healing ability and the high characteristics of safe class, can in switch cubicle and skyscraper, use.

The drawing explanation:

Fig. 1 is the structural representation of corresponding first embodiment of the utility model;

Fig. 2 is Figure 1A-A cutaway view;

Fig. 3 is the structural representation of capacitor among first embodiment;

Fig. 4 is the structural representation of capacitor among second embodiment;

Fig. 5 is the structural representation of corresponding the 3rd embodiment of the utility model;

Embodiment 1:

As Fig. 1, Fig. 2 and shown in Figure 3, the utility model has a shell 6 that is formed by epoxy resin, bottom and top are equipped with series capacitors 5 and resistor 4 in shell 6, two lead ends of said capacitor 5 and resistor 4 link with binding post 1 and 9 respectively, the supporting plate 2 of reinforcing and supporting role has been installed on binding post 1 and 9, said capacitor 5 is a metallized capacitor, its dielectric layer 31 is coincided by two strata propylene films and forms, and thickness is that the corresponding withstand voltage of 20m(is 0.8KV), be coated with respectively on two planes of dielectric layer 31 aluminium lamination 11 and two

aluminium laminations

21 and 22 and Different Plane on aluminium lamination interlaced, to form two pairs of pole plates (21 and 11,11 and 22), constitute an inner capacitor (C1 by series connection in two, C2) metallized capacitor of Zu Chenging, and inner capacitor (C1, C2) a shared pole plate 11, said resistor 4 is wrapped in constantan resistance wire 4 on the skeleton 3 ' constitute (said resistance wire 4 ' double end and around and the short circuit of starting) by insulating board skeleton 3 with noninductive winding, to reduce its inherent inductance, reduce its temperature rise, in the outer surface bottom of shell 6 annular groove 7 is arranged, in groove 7, be installed with a metal locating clip 8 that is used to install this absorber, on the said locating clip 8 holding screw 10 is installed, so that locating clip 8 is fastened on the shell 6, on locating clip 8, also have two through holes 8 that are used for fixing this absorber locus '.

Embodiment 2:

As shown in Figure 4, the utility model has a shell 6 that is formed by epoxy resin, series capacitors 5 and resistor 4 are installed in shell 6, and its lead end and binding post 1 and 9 link, supporting plate 2 is installed on binding post 1 and 9, said capacitor 5 is a metallized capacitor, and its dielectric layer 41 thickness are that the corresponding withstand voltage of 20m(is 0.8KV), on two planes of dielectric layer 41, be coated with two aluminium laminations (11 and 21) and three aluminium laminations (21 respectively, 22 and 23) and the aluminium lamination on two planes interlaced, to form three pairs of pole plates (21 and 11,11 and 22,22 and 12), constitute an inner capacitor (C1 by series connection in three, C2 and C3) metallized capacitor formed, and adjacent capacitor (C1 and C2, C2 and C3) shared pole plate 11 of difference and pole plate 22, skeleton 3 in the said resistor 4 is ceramic skeleton (also can adopt the insulating board skeleton), and other structure is the same.

Embodiment 3:

As shown in Figure 5, the utility model has a shell 6 that is formed by epoxy resin, bottom and top are equipped with series capacitors 5,5 ' and resistor 4 in shell 6, further to reduce the spread voltage of capacitor, said capacitor 5 and 5 ' structure with the structure of the capacitor 5 among first embodiment or second embodiment, other is same as above.

In addition, the shell of this surge absorber also can adopt ceramic material to make, above-mentioned capacitor and resistor are installed in the enclosure after, seal up loam cake, promptly make the surge absorber of ceramic package.

Claims

1, a kind of dry type surge absorber, comprise a shell and a binding post of making by insulating material, it is characterized in that, a resistor (4) and at least one capacitor (5) and series connection successively therebetween are installed in shell (6), its two ends lead end links with binding post (1 and 9) respectively, said capacitor (5) is a metallized capacitor, and the inner capacitor (C1 of series connection in the aluminium lamination of metallized capacitor inside and medium constitute at least two, C2), and adjacent inner capacitor (C1 and C2) shared aluminium lamination (11) is as a copolar plate, and said resistor (4) is made of the constantan resistance wire (4 ') that is wrapped in noninductive winding on the insulation framework (3).

2, according to the said dry type surge absorber of claim 1, it is characterized in that, a metal locating clip 8 that is used to install this absorber is installed on shell 6.

3, dry type surge absorber according to claim 1 and 2 is characterized in that, has been separately installed with the supporting plate 2 of reinforcing and supporting role on binding post 1 and 9.