Transient current measurement method, commercial power distribution system determination method capable of measuring transient current, and countermeasure method for commercial power distribution system that can not measure transient current and apparatus therefor

摘要

PROBLEM TO BE SOLVED: To provide a transient current measuring method, a method of determining a power distribution system capable of measuring transient current, and a countermeasure for enabling a power system that is determined as incapable to be used.SOLUTION: The method includes the steps of: connecting a dummy load to a connection position of an electrical device with the electrical device not connected to a commercial AC power supply shared by a plurality of different power distribution systems; measuring respective values of current through the dummy load when an electronic switch is turned on or off with a phase of 90° or 270°; and determining that a power distribution system is suitable for measuring transient current if each of the current values is equal to or more than a predetermined first current threshold, and determining that the power distribution system is not suitable for measuring the transient current if either one of the current values is not equal to or more than the first current threshold.SELECTED DRAWING: Figure 3