Contains protective relays that trigger breakers in milliseconds. 🛡️ Safety & Operational Observation
A dense copper mesh (earth mat) is buried underground to protect personnel from step and touch voltages. 🏗️ Technical Specifications (Typical) Standard Value Incoming Voltage 400,000 Volts (AC) Cooling Method ONAN/ONAF (Oil Natural Air Natural/Forced) Insulation Medium Porcelain/Composite for AIS; SF6cap S cap F sub 6 Busbar Configuration Double Main and Transfer (for high reliability) visit report of 400kv power substation
Provide a visible physical break in the circuit for safe maintenance. 4. Protection & Control Room and steel-toed dielectric boots.
Visiting requires hard hats, high-visibility vests, and steel-toed dielectric boots. visit report of 400kv power substation