First of all european voltages [this includes Korea] can be anywhere in increments of 190, 208, 220, 230 volts. If the transformer they supplied you is small there is no way you can step it up without a loss, unless you go to a next higher rating. 20 amps times 240 = 4800 watts. for your second part, a range outlet is rated 50 amps so you'd need protection for the line. your range is probably a four wire pigtail. can you send me a diagram? send to
srf12980@localnet.com - I can read european [overseas] prints.