They work, but for one, I don't want to shorten their lives by undervolting them and I want their full power output.
I was also wondering if i can add extra windings to the primary and eliminate the need for a secondary totally, like the attached picture. Sort of how Variacs have an output of 145 when 120 is supplied(overwinding).
Suggestions on how i can get 277 easily from either 120 or 240? Thanks!
You won't hurt a transformer by running it at lower voltage, but of course you won't get full power.Power (Watts) is the product of Voltage X Current, and current depends on the load resistance-impedance (Ohm's Law). ...I don't know what you're doing or why "wood burning" requires high voltage.
...by connecting hot to earth (square root of 3).
P=IE formula.Maybe someone else, that knows this subject better, can elaborate (and even, correct, as needed).