Block Diagram of a Typical Electric Supply System

Layout of Pole-Mounted Sub-Station & Schematic Connection

Typical Underground Sub-Station

Equipment in a Transformer

Equipment in a Transformer

Equipment in a Transformer

Use of Isolators in a Typical Sub-Station

Single Bus-Bar Arrangement in a Sub-Station

Bus-Bar With Sectionalisation

Arrangement of Duplicate Bus-Bur System

Schematic Connection of a Terminal Sub-Station

Schematic Connection of a Through Sub-Station

Key Diagram of a Typical 66/11KV Sub-Station

Key Diagram of a Typical 11KV/400V Indoor Sub-Station