What I have is a 250VA power transformer with an input of 117v and output of 24v or 48v. So when I apply the 120vac (121vac - 122vac actual) from the wall the outputs are a few volts higher 28v or 54v. This will be used to momentarily supply power to coils and motors up to 5 amps. A few volts high shouldn't hurt anything i wouldn't think however, if i wanted to reduce the voltages so that they are closer to 24v or 48v what would be the best way?
I considered a resistor voltage divider with 140w film power resisters with heatsink 33ohm and 1ohm at the VAC input to reduce the voltage coming in to around 117VAC.
I considered a resistor voltage divider with 140w film power resisters with heatsink 33ohm and 1ohm at the VAC input to reduce the voltage coming in to around 117VAC.