This document provides an overview of the key components in a 132kV substation, including: - Lightning arresters that divert high voltage waves to earth for protection. - Coupling capacitors that allow communication over power lines. - Wave traps that offer low impedance to carrier frequencies for communication. - Current and potential transformers that reduce currents and voltages for safe measurement and protection. - Circuit breakers, transformers, and busbars that distribute power throughout the substation. - Control rooms that monitor and control the substation operations. - Earthing systems that provide grounding for safety.