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What is 3-Phase Automatic Power Switch Design about?

This document summarizes the design and implementation of a 3-phase automatic power change-over switch. The switch uses three voltage comparators, a 3-input AND gate, two transistors, and two relays to automatically switch between a main public power supply and a backup generator power source. When the voltages of all three phases from the main supply are within a normal preset range, the AND gate outputs a 0 turning off the transistors, keeping the main supply on. But if the voltage drops in one or more ph

Author

dondb

Language

EN