equipment class
A circuit-breaker in which the contacts open and close in air at atmospheric pressure.
A circuit-breaker in which the arc develops in a blast of gas.
A circuit-breaker in which the contacts open and close in oil.
A circuit-breaker in which the contacts open and close within a highly evacuated envelope.
A list of recommended listing of spares received from vendor/manufacturer to support installation, commissioning, operation or maintenance.
A mechanical switching device that at regular intervals interrupts an electric current.