Why Choose the Mersen B076476 High-Voltage Motor Fuse?
The Mersen B076476, catalogue number 45ASB36V250P-1, is a high-performance high-voltage back-up fuse developed specifically for the protection of medium-voltage motors. Part of the established Mersen Limitor® aSJB/D series, it is designed to withstand repeated motor-starting currents while providing rapid interruption of damaging short-circuit faults.
Rated at 3.6 kV AC and 250 A, the B076476 provides reliable current-limiting protection for motors, motor control equipment and associated high-voltage switchgear. Its ability to restrict peak fault current and clearing energy helps reduce thermal and mechanical stress throughout the protected installation.
The fuse features silver-plated conductive components and a robust melamine fibreglass body for dependable service in demanding industrial environments. Its cylindrical construction has a nominal fuse body size of 76 × 192 mm, while an integrated 20 N striker provides mechanical operation indication and can actuate compatible switchgear mechanisms.
Key Advantages
- Specially designed for medium-voltage motor protection.
- 3.6 kV AC rated voltage.
- 250 A rated current.
- High 60 kA breaking capacity.
- Withstands repeated peak currents produced during motor starting.
- Current-limiting operation reduces thermal and mechanical fault stress.
- Integrated 20 N striker for operation indication and tripping.
- Durable melamine fibreglass construction for industrial environments.
Key Features
- Mersen Limitor® aSJB/D motor back-up fuse.
- Manufacturer part number: B076476.
- Catalogue number: 45ASB36V250P-1.
- Product designation: 369P CP ASJB 45/76.192 250.
- Rated voltage: 3.6 kV AC.
- Rated current: 250 A.
- Maximum breaking capacity: 60 kA.
- Minimum interrupting current: 1200 A.
- Nominal fuse body size: 76 × 192 mm.
- Indication system: 20 N striker.
Reliable Protection for Medium-Voltage Motors
The Mersen B076476 is engineered to protect high-voltage motors against severe short-circuit currents while tolerating the repeated peak currents associated with motor starting. This specialised operating characteristic helps prevent unnecessary fuse operation during normal starts while maintaining rapid response to genuine electrical faults.
Its current-limiting action restricts the maximum fault current and total clearing energy passed into the system. This helps protect motor windings, contactors, cables and switchgear while reducing the risk of costly equipment damage and prolonged production downtime.
Typical Applications
- Medium-voltage industrial motors.
- High-voltage motor control centres.
- Pumps, compressors and ventilation equipment.
- Mining and heavy-industry machinery.
- Water treatment and pumping installations.
- Industrial processing and manufacturing systems.
- High-voltage switchgear and controlgear.
