LM358B: AC High Low Voltage Cutoff

Hello Nitesh,

Is the goal to detect if AC voltage peaks are too high or too low then output binary good / no good signal?

What are the amplitude thresholds and AC frequency? How accurate?

hi,

Our goal is to cutoff Relay when Voltage exceed 270Vac, and restore when voltage less than 270Vac input, Similarly for under voltage input AC at 100Vac.

Hi Nitesh,

what you try to do is not trivial because the circuit needs to come in contact with the lethal mains voltage. So I hesitate to show a circuit which can do what you want.

Kai