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Eastern Center for Arts and Technology

ELE-303 Transformers and Polyphase

with Ron DeMarco


Covers reduction and solving for voltage, current or impedance in series and parallel circuits, differences between three-phase and one-phase distribution systems and layout of a vector diagram of the voltages in a three-phase wye and delta circuit. Also included is calculation of kva, kw and kvar in a three-phase system, law  of cosines, construction and operation of  meters, Construction  of a three-phase motor and principles of a three-phase rotating magnetic field.  Step-down/step-up transformers, excitation current, efficiency, amp-turns, primary to secondary winding voltage and current ratios are covered.

The successful passing of Classes 301-302 are prerequisites for registering for this class.


Spring Session 2023 will be held at Eastern Center for Arts and Technology

  • Session 1: Jan 12 - Mar 30th, 2023
    Thu for 12 weeks

    only 4 seats left

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