Distribution System Training

Continuing our review of electrical fundamentals, the objective of this module is to demonstrate the effect of inductance, and capacitance in AC circuits, leading to a discussion of power factor and its significance.

After completion of this video and associated workbook, the participant should be able to understand and apply the following concepts in day-to-day work activities:

• The significance of inductance and inductive reactance in an AC circuit
• Phase angle between current and voltage
• Vector representation of electrical properties
• Power in an inductive circuit
• Reactive power – VARs (Volt-Amperes Reactive)
• Reactive power demand in an inductive circuit (positive VARs)
• The significance of pure capacitance in an AC circuit
• Production of VARs by a capacitive element
• The power triangle – active power, reactive power, and apparent power
• Vector relationship between MW, MVARs, and MVA
• Definition of power factor
• Significance of low power factor on generator output (i.e. reduced MW capacity)
• Load power factor correction by capacitors