A disconnector or isolator is an electrical device used to safely separate a circuit from its power supply. It is mainly employed in substations and industrial setups for maintenance and safety. Unlike circuit breakers, isolators cannot interrupt current and are only used when the system is already de-energized. Their key role is to provide a clear physical break in the circuit to prevent accidental re-energization. These devices can be operated manually or through motorized or remote-control mechanisms. They come in various designs, such as single-break and double-break types. Isolators are essential for ensuring the safety of personnel during equipment servicing. They typically work alongside circuit breakers to enhance protection and control in electrical systems.
