JPS5878733U

JPS5878733U - Local backup device

Info

Publication number: JPS5878733U
Application number: JP17387181U
Authority: JP
Inventors: 敏信海老坂; 庄司　雅彦
Original assignee: 三菱電機株式会社
Priority date: 1981-11-19
Filing date: 1981-11-19
Publication date: 1983-05-27

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のローカルバックアップ装置の交′□流回
路図、第２図は第１図に示すローカルバックアップ装置
の制御回路図、第３図はこの考案の一実施例による石−
カルバツクアップ装置の交流回路図、第４図は第３図に
示すローカルバックアップ装置の制御回路図である。１・・・母線、２・・・送電線、３・・・遮断器、７・
・・送電線保護装置、９・・・母線保護装置、１０・・
・アンド・ゲート、１１・・・タイマ、１２・・・トリ
ップ回路。なお、図中、同一符号は同一部分を示す。Fig. 1 is an alternating current circuit diagram of a conventional local backup device, Fig. 2 is a control circuit diagram of the local backup device shown in Fig. 1, and Fig. 3 is an AC circuit diagram of a conventional local backup device.
FIG. 4 is a control circuit diagram of the local backup device shown in FIG. 3. 1... bus bar, 2... power transmission line, 3... circuit breaker, 7.
...Power line protection device, 9...Bus bar protection device, 10...
・AND gate, 11...timer, 12...trip circuit. Note that in the figures, the same reference numerals indicate the same parts.

Claims

[Scope of utility model registration request]

A logic circuit that takes the logical product of the operating signal of a fail-safe undervoltage relay of a bus bar protection device that has a function of protecting the bus bar from failure and a trip command output to a circuit breaker to disconnect the bus bar from a failure; A local backup device comprising a timer that outputs an output when the output of a logic circuit continues for a predetermined time period or more, and a trip circuit that trips all circuit breakers connected to the bus bar by the output of the timer.