Why Choose the Mersen N1000282 High Voltage Transformer Protection Fuse?
The Mersen N1000282 is a high voltage DIN back-up fuse-link designed to protect transformers and associated medium voltage equipment against the thermal and dynamic effects of short-circuit currents. Part of the proven Mersen Limitor®-PTD series, it combines dependable current-limiting protection with controlled power dissipation for use in demanding high voltage switchgear and distribution systems.
The N1000282 is manufactured using pure silver fuse elements, silver-plated copper terminals and a robust ceramic body. These high-quality materials help deliver consistent electrical performance, reliable fault interruption and long operational life in industrial, commercial and utility installations.
Rated at 24 kV AC and 50 A, this fuse-link provides a maximum breaking capacity of 65 kA. Its integrated 80 N thermal striker supports fault indication and operation of compatible air-insulated or gas-insulated switchgear following fuse operation.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 24 kV AC rated voltage for high voltage distribution systems.
- 50 A current rating for compatible transformer circuits.
- High 65 kA breaking capacity for dependable fault interruption.
- Integrated 80 N thermal striker for switchgear operation and fault indication.
- Controlled power dissipation helps manage heat within enclosed switchgear.
- Pure silver fuse elements provide consistent electrical performance.
- Compliant with IEC 60282-1 and VDE 0670 T402.
Key Features
- Mersen Limitor®-PTD high voltage DIN back-up fuse-link.
- Catalogue number: 45DB240V50PTD.
- Rated voltage: 24 kV AC.
- Rated current: 50 A.
- Fuse size: 65 mm diameter × 442 mm fuse body length.
- Overall product length: 508 mm.
- Integrated 80 N thermal striker indication system.
- Clip mounting with cylindrical terminals.
- Controlled power dissipation design.
- Suitable for air-insulated and gas-insulated switchgear.
High voltage back-up fuse-links protect transformers by rapidly interrupting severe short-circuit currents before excessive thermal or mechanical stress can damage transformer windings, switchgear or connected distribution equipment. Their current-limiting action also helps reduce the peak energy passed into a fault.
The Mersen N1000282 combines controlled power dissipation with a thermal striker, making it particularly suitable for coordinated use with compatible high voltage switchgear. This design helps manage heat within compact installations while enabling dependable fault indication and circuit isolation.
Typical Applications
- Medium voltage transformer protection.
- Air-insulated switchgear.
- Gas-insulated switchgear.
- Transformer substations.
- Ring main units.
- Industrial power distribution systems.
- Utility distribution equipment.
- OEM transformer controlgear.
