Závislosť P (W) a R (input), vstup (230 V), približne

Toroidal
P = 15 W		DC = 560 Ohm
P = 30 W		DC = 185 Ohm
P = 60 W		DC = 61 Ohm
P = 125 W		DC = 20,23 Ohm
P = 225 W		DC = 6,4 Ohm
Od P = 300 W treba použiť Soft Start
P = 500 W		DC = 2,24 Ohm
P = 1000 W	DC = 0,74 Ohm
P = 2000 W	DC = 0,24 Ohm
DeltaP = 2		Delta DC = 0,33

EI Transformer
P = 15 W		DC = 1280 Ohm
P = 30 W		DC = 420 Ohm
P = 60 W		DC = 140 Ohm
P = 125 W		DC = 46 Ohm
P = 250 W		DC = 15,2 Ohm
Od P = 500 W treba použiť Soft Start
P = 500 W		DC = 5 Ohm
P = 1000 W	DC = 1,65 Ohm
P = 2000 W	DC = 0,55 Ohm
DeltaP = 2		Delta DC = 0,33