Changeover Switch Fuse Unit

Changeover Switch Fuse Units are typically available in current ratings from 32A to 800A and voltage ratings up to 415V AC, suitable for both three-phase and single-phase systems. The unit consists of a robust switch-disconnector mechanism combined with high rupturing capacity (HRC) fuse links for reliable overload and short-circuit protection. The switch allows manual transfer between two power sources with clear ON–OFF–CHANGEOVER positions and positive break operation. Enclosures are fabricated from CRCA steel sheets with a powder-coated finish or thermoplastic housing, providing IP42 to IP54 protection levels. Fuse chambers are front-accessible for easy maintenance and fuse replacement. The terminals are copper or tinned brass for high conductivity, and internal components are designed for arc quenching and long mechanical life. These units comply with IS/IEC 60947-3 and are ideal for use in feeder panels, generator rooms, and power distribution networks requiring both control and protection functionalities.