Generator, Transformer, and Motor Protection

 At the end of 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.

• 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