Fuse disconnector Legrand R 303 63A 3P (model 606709) — 63 A, 3-pole

Legrand R 303 fuse disconnector 63A 3P (model 606709) is a three-pole switching device designed for isolating and protecting three-phase circuits. The unit integrates a manual isolator and a fuse holder to provide secure disconnection and overcurrent protection at a rated current of 63 A. Intended for use in electrical distribution boards, switchgear and industrial or commercial installations, the device facilitates safe maintenance and reliable protection of downstream equipment.

Advantages

The Legrand R 303 63A 3P combines a straightforward manual disconnection mechanism with fuse protection in a compact assembly, reducing panel space and simplifying wiring. Its three-pole configuration allows simultaneous isolation of all phases, improving safety during maintenance. The device is compatible with standard cylindrical fuses suitable for 63 A rating, enabling easy replacement and clear fault indication when a fuse operates. Built for use in commercial and light-industrial environments, it offers mechanical robustness and repeatable operation under normal service conditions.

Suitable for

• Isolation and protection of three-phase branch circuits in commercial buildings
• Electrical panels in light industrial installations
• Maintenance isolation for motors, pumps and HVAC equipment
• Distribution boards requiring a compact fuse disconnector solution

Key specifications

• Rated current: 63 A
• Number of poles: 3 (three-phase)
• Function: Manual isolator with fuse holder for overcurrent protection
• Mounting: Panel or distribution board compatible footprint
• Operation: Manual switching for isolation and fuse replacement
• Typical application environment: Commercial and light-industrial electrical installations

How to use

Mount the fuse disconnector in a suitable distribution board or panel cutout according to applicable electrical standards and wiring diagrams. Ensure power is switched off at the upstream supply before wiring. Install appropriate fuses rated for 63 A into the fuse holders, tighten connections to the recommended torque, and verify correct phase sequence and secure earthing. Use the manual handle to switch the device to the open position for safe isolation prior to maintenance; after replacing a blown fuse or completing work, close the handle to restore the circuit, observing proper safety procedures.

Usage recommendations

Select fuses that match the required breaking capacity and time-current characteristics for the protected circuit. Regularly inspect connections for looseness, overheating or corrosion and replace fuses only with ones of the correct rating. Follow local regulations and safety standards for installation, and consider using auxiliary signaling or interlocks if remote indication of fuse operation or lockout is required.