The document provides a summary of the single line diagram of the 132kv S/S PGIA substation. It has 3 incoming 132kv lines from the 400/220kv Sarojini Nagar substation and 1 outgoing 132kv line. The incoming lines pass through lightning arrestors and insulated discs before connecting to the gantry and circuit breakers. The line then passes through potential transformers and current transformers before connecting to the main bus bar. From the bus bar, the line is distributed to the 132kv bay and transformers through isolators. The substation also includes a 33kv substation with 2 40MVA transformers, 33kv bus bars, and bays. It describes the purpose of components like capacitor banks, isol