Title:
【発明の名称】電力開閉制御装置
Document Type and Number:
Japanese Patent JP2892717
Kind Code:
B2
Abstract:
An apparatus for controlling a switching device provided for breaking or closing a power line connecting a power source to a load in an electric power system includes a switching timing control unit for controlling the timing to apply a breaking signal to said switching device in response to a breaking signal externally applied thereto so that the contacts of said switching device are opened during a period of time when the current flowing through said power line first reaches its peak value from a zero value and for controlling the timing of applying a closing signal to said switching device in response to a closing command preferably externally applied thereto so that the contacts of said switching device are closed when the voltage of said power source becomes a predetermined value depending upon whether said load is capacitive or inductive, and an operating unit for opening and closing said contacts of said switching device in response to said breaking and closing signals, respectively.
Inventors:
KUROSAWA YUKIO
ARITA HIROSHI
HIRASAWA KUNIO
SATO TADASHI
ARITA HIROSHI
HIRASAWA KUNIO
SATO TADASHI
Application Number:
JP29505189A
Publication Date:
May 17, 1999
Filing Date:
November 15, 1989
Export Citation:
Assignee:
HITACHI SEISAKUSHO KK
International Classes:
H01H9/54; H01H33/59; H01H9/56; F02B75/02; (IPC1-7): H01H33/59; H01H9/54
Domestic Patent References:
| JP1213926A | ||||
| JP1213926A | ||||
| JP5975524A | ||||
| JP5445781A | ||||
| JP61296621A |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)