Why Choose the Mersen N1000259 High Voltage Transformer Protection Fuse?
The Mersen N1000259 is a premium high voltage DIN back-up fuse-link engineered to provide dependable short-circuit protection for transformers installed within medium voltage electrical distribution systems. As part of the proven Mersen Limitor®-PD series, it delivers reliable current-limiting performance for switchgear, substations and industrial power networks.
Designed specifically for transformer protection, the N1000259 features pure silver fuse elements, silver-plated copper terminals and a robust ceramic body for excellent electrical performance and long operational life. An integrated 80 N striker provides fault indication or operation of compatible switchgear following fuse operation.
With a 24 kV AC IEC voltage rating, 50 A current rating and a 63 kA breaking capacity, the Mersen N1000259 is ideally suited for protecting transformers, ring main units, substations and medium voltage switchgear against damaging short-circuit faults.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 24 kV AC IEC rated voltage.
- 50 A rated current.
- Integrated 80 N striker for switchgear operation and fault indication.
- 63 kA breaking capacity for dependable fault interruption.
- Pure silver fuse elements provide reliable electrical performance.
- Silver-plated copper terminals ensure excellent conductivity.
- Manufactured in accordance with IEC 60282-1 and VDE T402 requirements.
Key Features
- Mersen Limitor®-PD high voltage DIN back-up fuse-link.
- Catalogue number: 45DB240V50PD.
- Rated voltage: 24 kV AC.
- Rated current: 50 A.
- Fuse size: 65 mm diameter × 442 mm body length.
- Integrated 80 N striker mechanism.
- Clip mounting with cylindrical terminals.
- Current-limiting back-up fuse for transformer protection.
- Compliant with IEC 60282-1.
High voltage back-up fuse-links rapidly interrupt severe short-circuit currents before excessive thermal or mechanical stress can damage transformer windings, switchgear and associated power distribution equipment. Their current-limiting performance helps improve system reliability while reducing equipment damage during electrical faults.
The Mersen N1000259 combines robust construction with dependable electrical characteristics, making it suitable for utility, industrial and OEM transformer protection applications where reliable medium voltage protection is essential.
Typical Applications
- Medium voltage transformer protection.
- Electrical substations.
- Ring main units.
- Industrial switchgear.
- Utility power distribution systems.
- Renewable energy substations.
- OEM transformer equipment.
- Commercial and industrial electrical infrastructure.
