The per unit impedance listed on a transformer, as one such N/P read says,
"the per unit resistance 1 % the reactance per unit is 5 %."
Is this referred to the primary or the secondary or the whole transformer ?
Second if an Open circuit test is performed on the LV side is the per unit ratings on the N/P can they be used directly on the Low voltage side for example if as above it says resistance per unit 1 % does this mean the equivalent circuits resistance is 0.01 ohms as seen by the secondary.
Any help would be appreciated
Thanks
Tom
