Electrotechnical Systems

37Models of Power Circuit Devices

The pictures of the rst three transformers are shown in Figure 2.23. The rst trans-

former can have not three but two windings, which is indicated in its dialog box. The

transformer impedances: the leakage inductances and resistances of the windings,

active and inductive resistances of the magnetization circuit—can be given in pu or

in SI; this is xed in the rst line of the dialog box. In the rst case, these parameters

are dened in the ratio to the base resistance of the corresponding winding; for the

magnetization circuit the base values are the resistances of the rst winding. Forthe

winding with the ...