Title:
DIRECTIONAL RELAY
Document Type and Number:
Japanese Patent JPS5421547
Kind Code:
A
Abstract:
PURPOSE: To permit high speed processing by constructing R-C filters as a lowpass filter and a high-pass filter respectively, effecting parallel analog operation and adding the results.
Inventors:
SASAKI HIROSHI
Application Number:
JP8602977A
Publication Date:
February 17, 1979
Filing Date:
July 20, 1977
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02H3/42; (IPC1-7): H02H3/42