JPH03245430A

JPH03245430A - Buffer type gas-blast circuit breaker with closing resistant contact

Info

Publication number: JPH03245430A
Application number: JP4095090A
Authority: JP
Inventors: Tetsuya Nakamoto; 哲哉中本; Takeo Toyoda; 豊田　健夫; Seiji Azuma; 誠司東
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1990-02-23
Filing date: 1990-02-23
Publication date: 1991-11-01
Anticipated expiration: 2014-02-17
Also published as: JP2859358B2

Abstract

PURPOSE:To securely restrain an overvoltage upon closing, increase an insulation recovery speed upon operation of a closing resistant contact, and enhance reliability by certainly turning on the resistant contact prior to a main contact of an arc-extinguishing chamber. CONSTITUTION:A spring constant of a spring 36 is determined to satisfy k>(pi<2>.M)/(4g.T<2>), wherein T (sec.) represents a time from the start to the stop of a main contact movable pole 10 at the time of closing; Mkg, a mass of a spring system consisting of a closing resistant contact movable pole 32 and the spring 36; k (kgf/m), a spring constant; and g, acceleration of gravity. Consequently, the spring system consisting of the pole 32 and the spring 36 follows the motion of the pole 10 with a little delay, and a closing resistant contact is certainly turned on prior to a main contact of an arc-extinguishing chamber.

Description

【発明の詳細な説明】［発明の目的］（産業上の利用分野）本発明は、投入抵抗接点及び投入抵抗を有するパッファ
形ガス遮断器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a puffer type gas circuit breaker having a closing resistance contact and a closing resistance.

（従来の技術）近年、送電系統の大容量化に伴い、変電所や開笠拝、壱
、１２寸勤／覚柚ストローフ／一ノーーーー ′、τ　６１．。(Prior art) In recent years, with the increase in the capacity of power transmission systems, the number of substations, Kakasahai, 1, 12-sun shift / Kakuyu Strouf / 1 no-', τ 61. .

１梓＾、鷺２シ動第ア図1 Azusa ^, Sagi 2 Shido No. a figure

Claims

[Claims] A first main contact that can be freely connected and separated is placed in a container filled with arc-extinguishing gas.
The movable electrode and the second movable electrode of the main contact are disposed facing each other, and these main contacts are provided with a double motion mechanism that drives both electrodes in opposite directions when opening and closing the main contact, and is integrated with the first movable electrode of the main contact. a puffer cylinder that moves, a puffer piston that slides within the puffer cylinder, and an insulated nozzle that sprays the arc-extinguishing gas inside the puffer cylinder onto the arc; Resistance contact 1st
a movable electrode, and a second movable electrode of a closing resistance contact that interlocks with the second movable electrode of the main contact via a spring and that contacts and separates from the first movable electrode of the closing resistance contact while being biased by the spring. , the making resistance contact first movable electrode or the making resistance contact second movable electrode
In a double-motion puffer type gas circuit breaker with a closing resistor contact in which a closing resistor is electrically connected to at least one of the movable electrodes, the main contact and second movable electrode at the time of closing start to move until it stops. When the time is T (seconds), the mass of the spring system consisting of the second movable electrode of the closing resistance contact and the spring is M (kg), the spring constant is k (kgf/m), and the acceleration of gravity is g, A puffer type gas circuit breaker with a closing resistance contact, characterized in that the spring constant of the spring is determined so as to satisfy k>(π^2・M)/(4g・T^2).