Rancang Bangun Auto Transfer Switch Menggunakan Triac

Abstract

The availability of electrical power from utility sometimes disturbed, be it from internal of the system like equipment failure or from external of the system like nature phenomenon, so it will obstruct daily activities. However if the activities are urgent, so disturbance of electrical power is not allowed. It cannot help but must use backup supply that generally obtained from diesel generator that usually called genset. Despite that, turning the genset on manually there will be a rather long time delay so it is not too effective if the activities need to handled fast. Therefore this research is useful to solve that problem. This device uses three modes, those are Manual PLN, Manual Genset, and Auto. Manual PLN and Manual Genset mode, the transfer of electricity supply done manually. Meanwhile Auto mode transfers electricity supply by detects which supply available and then transfer it to load. The detection done by converting PLN’s AC supply to DC then directing it to Arduino microcontroller which will process incoming input then triggers TRIAC PLN or TRIAC Genset based on the status of PLN’s supply so power will flow to load pass through the TRIAC. This device can do the switching with good timing accuracy that matches with the programmed delay in microcontroller with nominal current 6A.