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Willmall switch disconnectors combine load switching and visible isolation in one unit, giving operators a clear, safe point of disconnection on panels and feeders.
It is a switching device that can make and break normal load current while also providing visible isolation, so both switching duty and safe disconnection are met by one unit.
A switch is built to make and break currents, while a disconnector is built for visible isolation of a dead circuit. A switch disconnector performs both roles in a single device.
A fused version adds fault protection where fuses are the preferred protection method, for example on main incomers or machine feeders where fuse replacement is the maintenance plan.
A door interlock prevents the panel door being opened while the disconnector is closed, reducing access to live parts during energisation and supporting safe door-opening routines.
They are rated by voltage, current, and the switching duty they can handle, matched to the load and the supply system of the feeder being isolated.
