FAULT DETECTION IN THREE PHASE ELECTRICAL DISTRIBUTION SYSTEM USING MICROCONTROLLER

J.SAI KEERTHI; A.N.ALEKHYA; M.V.S.VINOD BABA

Volume : V, Issue : X, October - 2016

FAULT DETECTION IN THREE PHASE ELECTRICAL DISTRIBUTION SYSTEM USING MICROCONTROLLER

J. Sai Keerthi, A. N. Alekhya, M. V. S. Vinod Baba

Abstract :

The Power instability in developing countries creates a need for automation of alternative sources of power to back up the utility supply. This automation is required as the rate of power outage becomes predominantly high. Most industrial and commercial processes are dependent on power supply and if the processes of change–over are manual, time is not only wasted but also creates device or machine damage of human error during the change–over connections, which could ing massive losses. Automatic phase change over solves this problem. Under the phase failure condition of any phase, this system detects and automatically transfers to the other active phase by switching the corresponding relay .In the event of all three phase failure or main outage, the system delivers uninterrupted power to the loads from inverter source or any other auxiliary supply. In this way uninterrupted power is delivered to the load irrespective of the faults. It finds wide application wherever continuity of supply is necessary, for switching from one phase to another phase in case of phase failure.The microcontroller continuously checks the condition of the phases connected to the loads and correspondingly changes the supply source using relays. A relay driver is used to drive transistor in order to energize the relay coils.