08/12/2025
⚡ Complete Substation Equipment Overview – CT, PT, LA, Transformer & Breaker! 👨🏭🔧
Today we carried out inspection & monitoring of key 66/11kV substation equipment including CT, PT, LA, Transformer & Circuit Breaker.
Each component plays a critical role in power system protection and reliability ⚡
🔵 CT – Current Transformer
📌 Steps down high current for metering & protection
📌 Ensures relay accuracy during faults
📌 Must be checked for tight connections & insulation
🧤 Prevents relay maloperation during high fault current
🟡 PT – Potential Transformer
📌 Reduces high voltage to measurable level
📌 Provides stable voltage signals to protection relays
📌 Regular cleaning & IR test is essential
⚡ Supports safe relay operation & metering accuracy
🔴 LA – Lightning Arrester
📌 Protects equipment from lightning & switching surges
📌 Discharges high surge voltage safely to earth
📌 Leakage current check ensures healthy LA
🌩️ Prevents insulation breakdown
🟢 Power Transformer
📌 Steps voltage up/down for transmission & distribution
📌 Oil level, silica gel, IR, BDV, and temperature checks required
📌 Any overheating, noise, or leakage must be monitored
🔥 Heart of the substation
⚫ Circuit Breaker (VCB/ACB/SF6)
📌 Interrupts fault current within milliseconds
📌 Protects transformer, feeders & entire system
📌 Needs mechanism lubrication & contact resistance testing
⚙️ Essential for reliable power protection
**⚡ Every device plays a vital role in a safe and reliable substation.
Regular inspection = Zero Failure. Zero Downtime. 👨🏭🛠️**
