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Electric Power Distribution Engineering, 3rd Edition by Turan Gonen

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Chapter 4

Design of Subtransmission Lines and Distribution Substations

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4.1 Introduction

In a broad definition, the distribution system is that part of the electric utility system between the bulk power source and the customers’ service switches. This definition of the distribution system includes the following components:

  1. Subtransmission system
  2. Distribution substations
  3. Distribution or primary feeders
  4. Distribution transformers
  5. Secondary circuits
  6. Service drops

However, some distribution system engineers prefer to define the distribution system as that part of the electric ...

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