Yet in my life, with three different houses at different locations, I have faced around 5+ times 440 volts that have burned devices. Today, alas, it happened again and I lost some valuable electrical devices. According to law of Pakistan, I can't sue WAPDA for it
This time I had tried to protect with circuit breakers and voltage stabilizer but none could saved from 440 volts.
I have around 30+ circuit breakers for each electricity line in my home, measured to line's load. They work correctly (if some wire is short they turn off). I have voltage stabilizer and UPS to give proper voltage. But none worked against 440 volts.
Now first question is, what is exactly 440 volts? AFAIK, it means positive in both line (negative and positive). Correct me if I am wrong.
Second and most important question is how to protect from 440 volts? Is there some kind of circuit breaker that will trip (break the circuit) if there is positive in negative line (440 volts)?
Please share your knowledge and information on how you protect your home's electrical devices from 440 volts?
Moreover, do anyone of you know a proven way to open (break) the circuit automatically when it detects 440 volts?
Thank you for your time for reading this. Your replies are most welcome.