Basic Concepts: Protections:

• • Introduction. Most Common Faults: Short Circuits.
  • High and Low Voltage.
  • Lightning Strikes.
  • Electrical Overloads.
  • Mechanical Forces (Motors).
  • Protection Requirements.
  • Response speed.
  • University Entrance Exam.
  • Safety.
  • Reliability.
  • IEEE Nomenclature.
  • Primary and backup protection.
  • Areas covered by the protective measures.
  • Protection and measurement transformers.

Overcurrent Protection:

• • Thermal damage curves for electrical equipment.
  • Criteria for selecting settings on an overcurrent device.
  • Criteria for Coordinating Overcurrent Protection.
  • Selectivity Curves. Ground Overcurrent.
  • Adjustment and Coordination Criteria.

Overcurrent Protection Devices:

• Overcurrent Relay.
• Thermal protection relay for induction motors.
• Low-Voltage Switches.
• Fuses.