After reading this chapter, you should be able to:

  • Provide an overview of substations
  • Describe the location and constructional features of substations
  • Classify bus bar arrangements
  • Discuss the various methods of grounding

The substation may be defined as an assembly of apparatus installed to perform switching, voltage transformation, power factor correction, power and frequency-converting operations.

The purpose of a substation is to take power at high voltages from the transmission or subtransmission level, reduce its voltage and supply it to a number of primary voltage feeders for distribution in the area surrounding it. In addition, it performs operational and emergency switching ...

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