PHASE IDENTIFICATION APPRATUS AND METHOD OF OF LEAKAGE AND ARC ON SWITCHGEAR

摘要

The present invention relates to an apparatus and method of monitoring whether electricity leakage or electric arc occurs in a switchgear and determining a phase at which the electricity leakage or electric arc occurs. The apparatus includes grounding bus bars connected to multiple switchgears to ground the switchgears; a leaking current sensor installed to measure a current leaking in each of the switchgears; an arc detecting sensor installed to detect an electric arc that occurs in each of the switchgears; a three-phase voltage measuring unit prepared to measure a three-phase voltage applied to the switchgears; a determination unit monitoring whether an electricity leakage and electric arc occur in the switchgears based on a leaking current measured from each leaking current sensor and an electric arc detected by each arc detecting sensor and determining a phase at which the electricity leakage or electric arc occurs in the switchgears from a three-phase voltage measured by the three-phase voltage measuring unit; and an output unit outputting a result of the monitoring and determination by the determination unit to an outside. According to the present invention, whether and which phase an electric arc occurs in a switchgear, as well as the electric leakage and its position may be determined, enabling precise and easy management of the switchgear. [Reference numerals] (150) Determination unit; (160) Display unit; (180) Setting unit