Why Choose the Mersen M076486 High Voltage Motor Fuse?
The Mersen M076486 is a high performance Limitor® aSJB/D high voltage back-up fuse-link developed specifically for protecting medium voltage motors against damaging short-circuit currents. Its motor protection characteristics allow it to withstand the repeated peak currents associated with motor starting while providing rapid interruption when a serious electrical fault occurs.
Identified by the catalogue reference 45ASB120V250P-3, the M076486 is suitable for high voltage switchgear, motor control equipment and industrial power systems. Its robust construction includes precision fuse elements, silver-plated contacts and a durable melamine fibreglass body designed for dependable performance in demanding electrical environments.
With a rated voltage of 12 kV AC, a rated current of 250 A and a fuse size of 88 mm diameter × 442 mm length, the Mersen M076486 provides reliable protection for appropriately rated medium voltage motors. An integrated 20 N striker supports fault indication and operation with compatible switchgear mechanisms.
Key Advantages
- Purpose-designed high voltage back-up fuse for motor protection.
- 12 kV AC rated voltage for medium voltage systems.
- 250 A rated current.
- Designed to tolerate repeated motor starting currents.
- 50 kA maximum breaking capacity for high fault interruption.
- Integrated 20 N striker for compatible switchgear operation.
- Current-limiting action reduces thermal and mechanical fault stress.
- Complies with recognised IEC and DIN high voltage fuse standards.
Key Features
- Mersen Limitor® aSJB/D motor protection fuse series.
- Catalogue number: 45ASB120V250P-3.
- 12 kV AC IEC rated voltage.
- 250 A current rating.
- 88 mm diameter × 442 mm length.
- 50 kA maximum AC breaking capacity.
- 1,280 kA²s total clearing I²t at rated voltage.
- 20 N striker mechanism.
- Clip-mounted DIN high voltage fuse construction.
- Motor protection characteristics with a K factor of 0.51.
Reliable Protection for Medium Voltage Motors
Medium voltage motors can draw substantial transient current during starting. The Mersen M076486 is engineered to support these repeated starting peaks without unnecessary fuse operation while still providing effective interruption of high short-circuit currents.
Its current-limiting design reduces the peak fault current and let-through energy reaching the motor, cables and switchgear. This helps limit thermal and mechanical damage, improve equipment protection and reduce the risk of prolonged production downtime following an electrical fault.
Typical Applications
- Medium voltage induction motors.
- Industrial motor control centres.
- High voltage motor starters.
- Pumps, compressors and industrial fans.
- Mining and mineral processing equipment.
- Petrochemical and manufacturing facilities.
- Medium voltage switchgear and controlgear.
