Title:
FIELD CIRCUIT GROUND FAULT MONITORING SYSTEM
Document Type and Number:
Japanese Patent JPS6016194
Kind Code:
A
Abstract:
PURPOSE:To prevent the erroneous judgement of a ground fault by starting a generator after controlling the temperature or moisture in a generator when becoming the operation value or higher of a field circuit ground fault protecting relay after a leakage current is started. CONSTITUTION:A computer 1 inputs a leakage current I, a temperature K in a generator, a moisture M in the generator and a starting command time t0, and discriminates whether it reaches the top value of a field ground fault protection relay or not after the current I is started at a time t0 on the basis of the temperature K and the moisture M. When discriminated that it reaches the top value, a start command B is fed to device group such as a space heater, and a dehumidifier, thereby controlling so that the leakage current becomes the top value or higher. Then, a main machine starting command A is fed. Thus, the erroneous operation of a field circuit ground fault protecting relay can be prevented.
More Like This:
Inventors:
ITOU AKIO
Application Number:
JP12334083A
Publication Date:
January 26, 1985
Filing Date:
July 08, 1983
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02P9/08; H02H7/06; (IPC1-7): H02P9/00
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)