System Protection Technology

2104 — Fault Characteristics

Duration: 4.0 Hour(s)

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$85.00
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Power Transmission

Power Distribution

NERC CE

The objective of this tape is to discuss the characteristics of different types of faults, and their effects on the power system. Knowledge of this material is vital to understanding the protective schemes that are presented in future videotapes.

After study of this tape and the associated workbook, participants should be able to understand the following overall concepts and apply them to their day-to-day work activities. They will also be able to answer related test questions on these subjects:

  • Effect of load impedance on current flow
  • Effect of short circuit impedance on fault current
  • Voltage drop through the system under fault conditions
  • Impedance phase angle
  • Safety grounding: the ground mat
  • Neutral grounding: generator or transformer
  • Delta system grounding transformer
  • Aerial ground wires on transmission lines
  • Limitation of ground fault current through impedance grounding
  • Ungrounded systems – Hazards & ground fault detection
  • Phasor diagrams for different types of faults
  • Resonance
  • Ferroresonance
  • Distortion of balanced conditions under the various types of faults
  • Transposition of balanced conditions at generator to unbalanced conditions at the fault
  • Production of positive, negative, and zero sequence components
  • Effect of negative and zero sequence components
  • Zero and negative sequence relays
  • Rules for study of symmetrical components

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