ABSTRACT
This chapter addresses the basic theories and conventions associated with three-phase alternating current (AC) electrical power systems. Three-phase power creates a rotating magnetic field in the stator windings of large induction and synchronous motors. There are two electrical components that seem to impact electrical circuits at any location: magnetic flux and capacitance. The generation of alternating voltage requires a continual changing magnetic flux. The chapter shows a resistor-capacitor (RC) charging circuit consisting of a 100 volt direct current (DC) source and a 1000 ohm resistor connected in series with a 50 microfarad capacitor. It illustrates procedures for handling series impedance and their vector relationships. The chapter deals with determining the impedance of a circuit that has resistance in series with capacitance. It also illustrates a wye winding connection, a balanced wye connected resistive load, and the related mathematical expressions and phasor relationships.
