Electric Substations — How do they work?

electric substations, how do they work?

Types of Substation

On the Basis of Operation:

90% OFF — Power System Protection Fundamentals
  1. Pole Mounted Substations (PMS)–are erected for mounting power distribution transformer in the localities. The pole mounted substation shall be located in non- hazardous overhead obstructions free environment.
  2. Foundation Mounted Substation / Surface Mounted Substation –mount the transformers on ground surface having capacity of 33,000 volts or above.

Comparison Table of Indoor and Outdoor Substation:

Indoor vs Outdoor Substations

Layout of a Substation:

Components of a Substation


  • How to select type of transformer?
  • What should be the size of transformer?
  • Why should you choose a transformer with minimum no load losses?


  • Monitoring equipment
  • Protection Devices

Calculation for Feeder Size and Overcurrent Protection

About The Author



Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
AllumiaX Engineering

AllumiaX Engineering

Leaders in Industrial & Commercial Power Systems Engineering