Voltage detecting apparatus for variable-frequency power system

Details Voltage detecting apparatus for variable-frequency power system Voltage detecting apparatus for variable-frequency power system

H - Electricity

02

H

324/59

H02H 7/09 (2006.01)

Patent

CA 1249338

ABSTRACT OF THE DISCLOSURE An apparatus for detecting a voltage in a variable-frequency power system equipped with a variable-frequency power unit in a path extending from an AC power supply line to a load, wherein the threshold value of a protective relay functioning upon occurrence of an abnormal voltage in the power system is determined in accordance with a physical quantity proportional to the system frequency.

457638

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