Why Choose the Mersen M078165 High Voltage Motor Fuse?
The Mersen M078165 is a premium Limitor® aSJB/D high voltage back-up fuse-link designed specifically to protect medium voltage motors against damaging short-circuit currents. Engineered for motor protection applications, it is capable of withstanding the repeated peak currents generated during motor starting whilst providing rapid interruption when severe electrical faults occur.
Manufactured under catalogue number 45ASB72V80P-2, the M078165 features pure silver fuse elements, silver-plated brass end caps and a durable melamine fibreglass body. Its robust construction delivers dependable performance in industrial switchgear, motor control centres and medium voltage electrical systems.
With a rated voltage of 7.2 kV AC, a rated current of 80 A and compact dimensions of 50.8 mm diameter × 292 mm length, the Mersen M078165 provides reliable protection for appropriately rated high voltage motors. The integrated 20 N striker supports operation with compatible switchgear mechanisms for effective fault indication and isolation.
Key Advantages
- Purpose-designed high voltage motor protection fuse-link.
- 7.2 kV AC rated voltage.
- 80 A rated current.
- Designed to withstand repeated motor starting currents.
- 50 kA breaking capacity.
- Integrated 20 N striker.
- Current-limiting characteristics reduce fault energy.
- Manufactured in accordance with IEC high voltage fuse standards.
Key Features
- Mersen Limitor® aSJB/D motor protection fuse.
- Catalogue number: 45ASB72V80P-2.
- 7.2 kV AC rated voltage.
- 80 A current rating.
- 50.8 mm diameter × 292 mm length.
- 50 kA maximum AC breaking capacity.
- 60 kA²s total clearing I²t.
- 380 A minimum breaking current.
- 20 N striker mechanism.
- Motor protection coefficient K = 0.51.
Reliable Protection for Medium Voltage Motors
The Mersen M078165 has been developed specifically for medium voltage motor circuits where repeated starting currents are expected. Unlike conventional fuse-links, its characteristics allow normal motor starting whilst still providing rapid interruption during severe short-circuit conditions.
Its current-limiting design helps reduce the thermal and mechanical stress imposed on motors, cables and switchgear, improving equipment protection and supporting long-term system reliability in industrial installations.
Typical Applications
- Medium voltage induction motors.
- Motor control centres.
- Industrial pumps and compressors.
- Mining and processing equipment.
- HV motor starters.
- Manufacturing plants.
- Medium voltage switchgear.
