Hi, Myself Manohar Meena. No need to tell anybody that over voltage auto cut circuit is very useful. Not only in stabilizers, we can use it in any power supply given to our expensive appliances to protect them from high voltage danger. I think we should use it to protect our complete house supply. Here I presented the circuit's connection in very interesting and comprehensive way in the following video.
Most of us have electricity that is very reliable so it almost never is cutoff, and its voltage and frequency are regulated by the electricity company.
So we do not need your voltage stabilizer with auto cut.
From what I can make out without a schematic, this looks to be a simple relay driver with the bias taken from a potentiometer across the supply. If I'm right, it will have a linear region at operating point which risks damaging the relay. It should have an abrupt action and hysteresis to work properly.
Audioguru - wait until the invasion from the south :-?
Unlike in some countries that have millions of people climbing electricity poles and hooking up their own wires to steal electricity, Canadian electricity lines are underground where the thieves cannot tamper with them. But instead the southern invaders will steal our welfare funding and healthcare.
Just a joke Ansmann, the country south of where Audioguru lives seems a little hostile around it's borders at the moment! This isn't the place to discuss politics though.