Why Choose the Mersen E1000573 High-Voltage Back-Up Fuse?
The Mersen E1000573, catalogue reference 45DB175V80P, is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the damaging effects of short-circuit currents. Part of the Mersen Limitor®-P series, it provides reliable current limitation and fault interruption for medium-voltage switchgear, controlgear and transformer protection systems.
Rated at 17.5 kV AC and 80 A, the E1000573 is manufactured using high-quality materials selected for dependable electrical and mechanical performance. Its construction includes pure silver fuse elements, silver-plated copper terminals and a durable ceramic insulating body suitable for demanding medium-voltage installations.
The fuse incorporates a standard 80 N striker that provides clear operation indication and can activate compatible switch-disconnector mechanisms. With a maximum breaking capacity of 63 kA, the Mersen E1000573 offers robust protection for transformers used in industrial, commercial and utility power distribution applications.
Key Advantages
- High-voltage DIN back-up fuse designed for transformer protection.
- 17.5 kV AC rated voltage for medium-voltage distribution systems.
- 80 A rated current.
- High 63 kA breaking capacity for dependable short-circuit interruption.
- Integrated 80 N striker for indication and switchgear operation.
- Current-limiting performance helps reduce thermal and mechanical fault stresses.
- Pure silver fuse elements support consistent operating characteristics.
- Robust ceramic body suitable for industrial switchgear environments.
Key Features
- Mersen Limitor®-P back-up fuse series.
- Manufacturer article number E1000573.
- Catalogue number 45DB175V80P.
- 17.5 kV AC IEC rated voltage.
- 80 A rated current.
- 63 kA maximum breaking capacity.
- 350 A minimum breaking current.
- Total clearing I²t of 150 kA²s at rated voltage.
- Power dissipation of approximately 180 W at rated current.
- Standard 80 N striker indication system.
- Cylindrical silver-plated copper terminals.
- Clip-mounted DIN construction for compatible fuse holders.
High-voltage back-up fuses interrupt substantial short-circuit currents before they can cause severe thermal or mechanical damage to transformers, conductors and switchgear. The Mersen E1000573 provides rapid current limitation during high-level faults, helping reduce the peak current and energy allowed to pass through the protected electrical system.
As a back-up fuse, the E1000573 is intended primarily for short-circuit protection and should be coordinated with suitable overload protection and switchgear. Correct fuse selection must consider the transformer rating, magnetising inrush current, prospective fault level, ambient conditions and the requirements of the associated switching equipment.
Typical Applications
- Medium-voltage distribution transformer protection.
- Industrial transformer feeders.
- Air-insulated medium-voltage switchgear.
- Gas-insulated medium-voltage switchgear.
- Ring main units and compact substations.
- Utility electrical distribution networks.
- Commercial and infrastructure power systems.
- Renewable-energy transformer installations.
