Why Choose the Mersen Y085581 High-Voltage Motor Fuse?
The Mersen Y085581, catalogue reference 45ASD72V100P-3, is a high-voltage back-up fuse-link developed to protect industrial motors against damaging short-circuit currents. Part of the proven Mersen Limitor® aSJB/D series, it is designed for dependable operation in high-voltage switchgear, motor control equipment and industrial power distribution systems.
Rated at 7.2 kV AC and 100 A, the Y085581 provides effective current-limiting protection while supporting the repeated peak currents produced during motor starting. Its specialised motor-protection characteristics help prevent unnecessary fuse operation during normal acceleration while ensuring rapid interruption when a severe short-circuit fault occurs.
The fuse-link has a cylindrical high-voltage format measuring 50.8 mm in diameter and 442 mm in length. It includes an integrated 20 N striker for operating compatible switchgear mechanisms or providing indication after the fuse has operated.
Key Advantages
- Specially designed for high-voltage motor short-circuit protection.
- 7.2 kV AC voltage rating for industrial motor systems.
- 100 A rated current for suitable high-voltage motor circuits.
- Withstands repeated peak currents associated with motor starting.
- Current-limiting action helps reduce thermal and mechanical fault stresses.
- Integrated 20 N striker for switchgear operation or indication.
Key Features
- Mersen Limitor® aSJB/D high-voltage back-up fuse-link.
- Catalogue number: 45ASD72V100P-3.
- Rated voltage: 7.2 kV AC.
- Rated current: 100 A.
- Breaking capacity: 50 kA.
- Fuse dimensions: 50.8 mm diameter × 442 mm length.
- Striker force: 20 N.
- Designed to tolerate repeated high motor-starting currents.
- Clip-mounted format for compatible high-voltage fuse installations.
Reliable Protection for High-Voltage Motors
High-voltage motors can draw substantial temporary currents during starting. The Mersen Y085581 is engineered to withstand these repeated current peaks without unnecessary operation while still providing rapid protection against serious short-circuit faults.
As a back-up fuse-link, the Y085581 interrupts high fault currents above its specified minimum breaking-current level. It should be correctly coordinated with a suitable contactor, circuit-breaker, overload relay or other protective device to provide comprehensive motor protection throughout the required operating range.
Typical Applications
- High-voltage industrial motor protection.
- Motor control centres and starter panels.
- Pumps, compressors and ventilation systems.
- Conveyors, crushers and material handling equipment.
- High-voltage switchgear and controlgear.
- Industrial processing and manufacturing installations.
