ASSESSMENT OF VOLTAGE QUALITY PROBLEMS OF ELEVATOR EQUIPMENT DUE TO VOLTAGE SAG

초록

This paper researches the mutual relation between elevator accidents and power quality such as voltage sags and interruptions For analyzing the power quality at the elevator switchboard in an apartment, we measure the real-time power quality (voltage sags, swells, interruptions, harmonics and so on) and research the error messages (under voltage error, etc) from an elevator control room We evaluate the performance and susceptibility to incidents such as sudden stops, people getting locked in an elevator, etc by testing three standards imitation elevator equipment by changing the magnitude and duration of the voltage sag We draw the ITIC (Information Technology Industry Council) curve for three elevator models, each having a different M/C (magnetic contactor) control system Through experiments, we verify that changes in the power quality can lead to accidents such as sudden stops leading to people being locked in the elevator and the M/C system is an important cause of the abovementioned problems We propose that the normal operation be extended in order to decrease the uneasiness faced by elevator passengers

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