How to Build a 2 Stage Mains Power Stabilizer Whole House

In this power stabilizer circuit, one relay is wired to select the high or the low tap from the stabilizer transformer at some particular voltage level; whereas the second relay keeps the normal mains voltage switched in, but the moment there’s a voltage fluctuation it toggles and selects the appropriate HOT tap via the first relay contacts.A simple power stabilizer circuit discussed here is very