Why Choose the Mersen P075522 High Voltage Motor Protection Fuse?
The Mersen P075522 is a high voltage back-up fuse-link designed to protect medium voltage motors and associated electrical equipment against damaging short-circuit currents. Part of the established Mersen Limitor® aSJB/D series, it is engineered to withstand the repeated peak currents generated during motor starting while providing dependable current-limiting protection during serious electrical faults.
This fuse-link is manufactured using silver-plated copper fuse elements, silver-plated brass terminals and a robust melamine fibreglass body. These carefully selected materials provide reliable electrical conductivity, effective fault interruption and long operational life within demanding high voltage switchgear and controlgear installations.
Rated at 3.6 kV AC and 125 A, the Mersen P075522 provides a maximum breaking capacity of 60 kA. Its integrated 20 N striker can provide fault indication or operate compatible switching equipment after the fuse-link functions, helping support safe and coordinated motor protection.
Key Advantages
- Designed specifically for medium voltage motor protection.
- 3.6 kV AC rated voltage for high voltage motor circuits.
- 125 A current rating for compatible industrial motors.
- Supports repeated peak currents associated with motor starting.
- High 60 kA breaking capacity for dependable fault interruption.
- Integrated 20 N striker for fault indication and switchgear operation.
- Silver-plated conductive components provide reliable electrical performance.
- Robust melamine fibreglass body supports long service life.
Key Features
- Mersen Limitor® aSJB/D high voltage back-up fuse-link.
- Catalogue number: 45ASB36V125P-2.
- Rated voltage: 3.6 kV AC.
- Rated current: 125 A.
- Fuse size: 50.8 mm diameter × 292 mm fuse body length.
- Overall product length: 358 mm.
- Integrated 20 N striker indication system.
- Clip mounting with cylindrical terminals.
- Current-limiting back-up protection for high voltage motors.
- Motor protection coefficient K of 0.51.
Reliable Protection for Medium Voltage Motors
High voltage motor fuse-links must tolerate the elevated current drawn during normal motor starting without unnecessary operation. During a severe short-circuit fault, however, the fuse-link must rapidly limit and interrupt the current before excessive thermal or mechanical stress damages the motor, cables or associated switchgear.
The Mersen P075522 is specifically designed for this demanding duty. Its motor protection characteristics, robust construction and integrated striker make it suitable for coordinated use within industrial motor starters and high voltage controlgear.
Typical Applications
- Medium voltage motor protection.
- Industrial motor starters.
- High voltage switchgear and controlgear.
- Pumps, compressors and ventilation equipment.
- Mining and quarrying machinery.
- Process manufacturing equipment.
- Water and wastewater treatment systems.
- OEM medium voltage motor control systems.
