ALL YOU NEED TO KNOW ABOUT DISCONNECTORS / ISOLATORS
DISCONNECTOR / ISOLATOR Fig 1.1 - S&S Power Switchgear Limited A disconnector is used in transmission lines and grid substations to disconnect or isolate the power source for maintenance purposes or bus transfer. We can operate the disconnector manually or motorize with the help of the operating mechanism. For safety purposes, The disconnectors are paired with earth switches. Types of Disconnectors : Centre Break, Double Break and Pantograph Centre Break Disconnector Centre break disconnector provides isolation by breaking at the centre of two insulators mounted parallel to each other Components of centre break : Disconnector Base Insulators Support structure Rotating hamper assembly Fixed contact assembly Interphase coupling pipes Interlocks Operating mechanism Fig 1.2 - S&S Power Switchgear Limited Centre Break Disconnectors at PGCB Double Break Disconnector Double break disconnector provides isolation by way of circuit disconnections at the two ends incoming and outgoing