Title:
FAULT DIAGNOSING METHOD FOR TRANSMISSION/DISTRIBUTION LINE
Document Type and Number:
Japanese Patent JP2531407
Kind Code:
B2
Abstract:
PURPOSE: To form an efficient algorithm by composing of a zero-phase current detecting-waveform shaper, a zero-phase voltage detecting.waveform shaper, a current detecting.waveform shaper.voltage detecting.waveform shaper, an input/output interface circuit and a CPU.
CONSTITUTION: A zero-phase current detecting-waveform shaper 1 shapes a zero-phase current Ia detected by a zero-phase current transformer ZCT. A zero-phase voltage detecting.waveform shaper 2 shapes a zero-phase voltage V0 detected by a zero-phase voltage detector ZPD. A current detecting.waveform shaper 3 shapes currents Ia-Ic of power distribution line phases, detected by a current transformer CT. A voltage detecting.waveform shaper 4 shapes ground voltages Va-Vc of power distribution phases detected by a transformer PT for an instrument. The currents I0, Ia-Ic, the voltages V0, Va-Vc are sent to a CPU 6 through an input/output interface 5, and calculated by the CPU 6. Thus, an efficient algorithm can be formed.
Inventors:
TOGAMI MASATO
Application Number:
JP18272391A
Publication Date:
September 04, 1996
Filing Date:
July 23, 1991
Export Citation:
Assignee:
TOGAMI ELECTRIC MFG
International Classes:
G01R31/02; G01R31/08; H02H7/26; H02J13/00; (IPC1-7): H02J13/00; G01R31/08
Attorney, Agent or Firm:
Kobori Masashi