JPH0175923U

JPH0175923U -

Info

Publication number: JPH0175923U
Application number: JP1987170276U
Authority: JP
Priority date: 1987-11-07
Filing date: 1987-11-07
Publication date: 1989-05-23

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例による回路しや断
器の主要部の部分断面側面図、第２図は第１図の
線―に沿つた拡大断面図、第３図はこの実施
例における環流側板の斜視図、第４図は従来の回
路しや断器の部分断面側面図、第５図は第４図の
もののアークランナ装置周辺の平面図である。図において、２は固定接触子、２０１は固定接
点、３は可動接触子、３０１は可動接点、４は消
弧装置、９はアークランナ装置、９０１は第一の
アークランナ、９０２は第二のアークランナ、１
０は環流側板、１０１はガス環流穴、１４は絶縁
板、１４１，１４２は絶縁板１４の側壁、１４３
は底壁、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 partial cross-sectional side view of the main parts of a circuit breaker according to an embodiment of this invention, Fig. 2 is an enlarged sectional view taken along the line - in Fig. FIG. 4 is a partially sectional side view of a conventional circuit breaker, and FIG. 5 is a plan view of the area around the arc runner device of FIG. 4. In the figure, 2 is a fixed contact, 201 is a fixed contact, 3 is a movable contact, 301 is a movable contact, 4 is an arc extinguisher, 9 is an arc runner device, 901 is a first arc runner, 902 is a second arc runner, 1
0 is a reflux side plate, 101 is a gas reflux hole, 14 is an insulating plate, 141, 142 is a side wall of the insulating plate 14, 143
is the bottom wall and A is the arc. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Scope of Claim for Utility Model Registration] (1) A fixed contact carrying a fixed contact, a movable contact carrying a movable contact and disposed opposite to the fixed contact, and a movable contact disposed opposite to these contacts. an arc extinguishing device for extinguishing an arc generated between these contacts when the movable contact is separated from the fixed contact, an arc runner device for guiding the arc to the arc extinguishing device, and a gas circulation hole, respectively. a first arc runner comprising a pair of circulation side plates provided on both sides of the arc runner device, the arc runner device comprising a portion extending from a fixed contact of the fixed contact to the arc extinguishing device; and a second arc runner disposed opposite to the arc extinguishing device and extending from the arc extinguishing device to a position adjacent to the movable contact in the open position, the arc runner device of the circulation side plate is A circuit breaker or circuit breaker characterized in that an arc-resistant insulating plate is provided on the opposite side at least facing the gas circulation hole and spaced apart from the gas circulation hole. (2) Arc-resistant insulating plates are provided on both side walls of each reflux side plate facing away from the arc runner device, and a bottom wall formed integrally with the both side walls and facing the bottom of the reflux side plate and the arc runner device. The first scope of claims for utility model registration, which is characterized by
Circuit breakers and breakers as described in section. (3) The circuit breaker according to claim 1 of the utility model registration, characterized in that an arc-resistant insulating plate is attached to a member of the circulation side plate facing the opposite side of the arc runner device. (4) The circuit breaker according to claim 1, wherein the arc-resistant insulating plate is made of glass fiber impregnated with fluororesin. (5) The circuit breaker or circuit breaker according to claim 1, wherein the arc-resistant insulating plate is made of a ceramic material.