Transformer Protection

Learning objectives

  • Recall the basic construction of a common power transformer
  • Identify the different types of transformer faults
  • Identify the different types of pressure protection
  • Recall the advantages and disadvantages of using fuses, circuit switchers, and circuit breakers for overcurrent protection
  • Recall how ground fault protection is able to distinguish between an internal and external fault
  • Recall the basic operation of differential protection
  • Identify the different methods used to manage inrush current
  • Identify the conditions required in order for reactor banks to perform similar to transformers
  • Recall how capacitor banks detect and protect against severe imbalance
  • Identify the limitations of differential protection with phase shifting transformers

Course overview

Transformers are integral to the transportation of electrical energy through power systems. They can be found at almost every generation facility and transmission substation. Because transformers play an integral role, protection is necessary. Transformer protection can address multiples fault types. Each fault type is protected against with various relaying methods.

The Transformer Protection training course explains the basic construction and protection methods used in transformer protection. This online course focuses on:

  • Transformer construction and fault categories
  • Thermal and pressure protection
  • Overcurrent and ground fault protection
  • Differential protection
  • Other transformer and shunt connected devices

Transformer Protection is part of the System Protection training series.

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