Why Choose the Mersen Z085582 High-Voltage Motor Protection Fuse?
The Mersen Z085582, catalogue reference 45ASD72V125P-3, is a high-voltage DIN back-up fuse-link specifically developed to protect medium-voltage motors against short-circuit currents while withstanding the repeated inrush currents associated with motor starting. As part of the proven Mersen Limitor® aSJB/D series, it provides dependable protection for industrial motor circuits, switchgear and motor control applications.
Rated at 7.2 kV AC and 125 A, the Z085582 delivers rapid current-limiting protection that interrupts severe fault currents before they reach their maximum prospective peak. This helps reduce thermal, electrical and mechanical stress on motors, cables and associated switchgear while maintaining reliable system performance.
Constructed using pure silver fuse elements, silver-plated brass end caps and a melamine fibreglass body, the fuse measures 50.8 mm in diameter and 442 mm in length. It incorporates an integrated 20 N striker for operating compatible switchgear mechanisms or providing clear fuse indication after operation.
Key Advantages
- Designed specifically for medium-voltage motor protection.
- 7.2 kV AC voltage rating for industrial motor systems.
- 125 A rated current for demanding motor applications.
- Designed to withstand repeated motor starting currents.
- Current-limiting operation reduces fault energy and equipment damage.
- Integrated 20 N striker for switchgear operation or indication.
Key Features
- Mersen Limitor® aSJB/D motor protection fuse-link.
- Catalogue number: 45ASD72V125P-3.
- Rated voltage: 7.2 kV AC.
- Rated current: 125 A.
- Fuse dimensions: 50.8 mm diameter × 442 mm length.
- Power dissipation: 37 W at 0.7 In.
- Operating I²t: 150 kA²s.
- 20 N trip striker.
- Pure silver fuse elements.
- Melamine fibreglass fuse body.
Reliable Protection for Medium-Voltage Motors
The Mersen Z085582 has been engineered specifically for medium-voltage motor circuits where repeated starting currents require a fuse capable of withstanding high peak currents while still providing rapid interruption of damaging short-circuit faults.
Its current-limiting characteristics reduce the energy released during severe faults, helping extend the service life of motors, switchgear and associated electrical equipment while improving overall system reliability.
Typical Applications
- Medium-voltage motor protection.
- Motor control centres.
- Industrial pumps and compressors.
- Mining and processing plants.
- HV switchgear and motor starters.
- Heavy industrial automation systems.
