Strong electromagnetic fields are present; metallic objects may "tingle" if not grounded.
Houses the (Supervisory Control and Data Acquisition) system.
Uses atmospheric air as insulation; requires large footprints and visible overhead busbars. GIS: Uses sulfur hexafluoride ( SF6cap S cap F sub 6 visit report of 400kv power substation
) gas; more compact and housed indoors, ideal for urban areas. 2. Power Transformers The "heart" of the substation. Steps voltage down from .
Visiting requires hard hats, high-visibility vests, and steel-toed dielectric boots. Strong electromagnetic fields are present
Equipped with massive and oil-cooling systems to manage heat. 3. Circuit Breakers & Isolators
Contains protective relays that trigger breakers in milliseconds. 🛡️ Safety & Operational Observation more compact and housed indoors
Monitors real-time data: voltage, current, frequency, and transformer temperature.