VARIAC....MEX?
Hopefully MEX will chime in but anyone else is welcome, of course. Looking to buy a VARIAC. I have a Harbor Freight manual charger that I use for equalizing and sometimes the finishing charge. The pro...
Forum Discussion
Golden_HVAC wrote:
"Many variacs say to not turn the dial with a load on it. I would not be turning the load down to 0 volts before shutting it off. Rather I would shut off the charger first, then with no load you can adjust the voltage."
I have used hundreds of variacs over the last 40 years or so. Used to control many kW of power. Most of the equipment needed to start at zero volts and slowly brought up to operating voltage. Shutting down was also a slow reduction of voltage. Some equipment had motor driven variacs that automatically adjusted the voltage, always under load. I don't ever remember a variac spec that said not to adjust under load. It would be interesting to see such a spec.
"Many variacs say to not turn the dial with a load on it. I would not be turning the load down to 0 volts before shutting it off. Rather I would shut off the charger first, then with no load you can adjust the voltage."
I have used hundreds of variacs over the last 40 years or so. Used to control many kW of power. Most of the equipment needed to start at zero volts and slowly brought up to operating voltage. Shutting down was also a slow reduction of voltage. Some equipment had motor driven variacs that automatically adjusted the voltage, always under load. I don't ever remember a variac spec that said not to adjust under load. It would be interesting to see such a spec.
