JPH0163043U

JPH0163043U -

Info

Publication number: JPH0163043U
Application number: JP1987158995U
Authority: JP
Priority date: 1987-10-15
Filing date: 1987-10-15
Publication date: 1989-04-24
Anticipated expiration: 2002-10-15
Also published as: JPH081551Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による回路しや断
器の消弧装置の一部破断斜視図、第２図は第１図
の平面図、第３図は第２図の線―に沿つた断
面図、第４図、第５図および第６図はそれぞれこ
の考案による回路しや断器の消弧装置の異なる実
施例の部分断面斜視図、第７図は従来の消弧装置
を備えた回路しや断器の部分断面側面図、第８図
は第７図の平面図である。図において、２，３は開閉接触子、４は消弧装
置、４０１は消弧板、４０３は消弧板４０１の脚
部、９Ａは絶縁板、９０１は絶縁板９Ａの開閉接
触子側の縁部、９０２は縁部９０１の上部、９０
３は下部、９０４は中央部、Ａはアークである。
なお、各図中同一符号は同一部または相当部を示
す。 Fig. 1 is a partially cutaway perspective view of an arc extinguishing device for a circuit breaker according to an embodiment of this invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is taken along the line - in Fig. 2. 4, 5, and 6 are partial sectional perspective views of different embodiments of the arc extinguishing device for circuits and circuit breakers according to this invention, and FIG. 7 shows a conventional arc extinguishing device. FIG. 8 is a partially sectional side view of the circuit breaker and circuit breaker, and FIG. 8 is a plan view of FIG. 7. In the figure, 2 and 3 are switching contacts, 4 is an arc extinguishing device, 401 is an arc extinguishing plate, 403 is a leg of the arc extinguishing plate 401, 9A is an insulating plate, and 901 is the edge of the insulating plate 9A on the switching contact side. 902 is the upper part of the edge 901, 90
3 is the lower part, 904 is the center part, and A is the arc.
Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Claims for Utility Model Registration] (1) An arc extinguishing device for a circuit breaker, which is disposed facing a pair of switching contacts and extinguishes the arc that occurs between the switching contacts when the current is interrupted. A plurality of substantially U-shaped arc-extinguishing plates each having an opening on the opening/closing contact side are held in a stacked relationship with a space between them, and an insulating plate is provided inside both legs of the arc-extinguishing plate. in which both legs of the arc-extinguishing plate are covered by the arc-extinguishing plate, in which a part of the edge of the insulating plate on the opening/closing contact side is cut out, and the legs of the arc-extinguishing plate are exposed to the arc at this cut-out part. An arc extinguishing device for circuit breakers and circuit breakers. (2) The arc extinguishing device for a circuit or breaker as set forth in claim 1 of the utility model registration claim, characterized in that the center portion of the insulating plate on the switching contact side is cut out, leaving the upper and lower portions of the edge. . (3) The arc extinguishing device for a circuit or breaker according to claim 1 of the utility model registration claim, characterized in that the upper part of the edge of the insulating plate on the switching contact side is left open and the other parts are notched. (4) The arc extinguishing device for a circuit or breaker according to claim 1 of the utility model registration claim, characterized in that the lower part of the edge of the insulating plate on the opening/closing contact side is left open and the other parts are cut out. (5) The arc extinguishing device for a circuit or breaker as set forth in claim 1 of the utility model registration claim, characterized in that the center part of the edge of the insulating plate on the switching contact side is left open and the other parts are notched. .