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Generator, Transformer, and Motor Protection

Learning objectives

  • Describe types of ground circuit connections for a generator
  • Compare the current flow for various types of generator ground connections
  • Describe the function of a differential current relay
  • Discuss the number of relays needed for three-phase, differential overcurrent protection
  • Identify resources that specify the level of overload protection that should be used for a motor
  • Describe how to choose overload protection for a three-phase motor

Course overview

When you complete this lesson, you will understand the principles of operation governing ground fault protection, phase-to-phase short circuit, time overcurrent protection, and motor overload protection.

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