Why Choose the Mersen L1000257 High Voltage Transformer Fuse?
The Mersen L1000257 is a premium Limitor®-PD DIN high voltage back-up fuse-link developed to provide dependable short-circuit protection for medium voltage transformers. Manufactured in accordance with IEC 60282-1 and VDE 0670 T402, this fuse is designed for electrical distribution networks where reliability and equipment protection are essential.
Part of Mersen's trusted Limitor®-PD range, the L1000257 is manufactured using pure silver fuse elements, silver-coated copper end caps and a durable ceramic body. The integrated 80 N striker enables reliable operation with compatible switchgear, while the low power dissipation design helps maintain dependable performance throughout the product's service life.
With a 24 kV AC rated voltage, 31.5 A current rating and 56 mm diameter × 442 mm length, the L1000257 is ideal for protecting distribution transformers and medium voltage electrical equipment against damaging fault currents.
Key Advantages
- DIN high voltage back-up fuse-link for transformer protection.
- 24 kV AC IEC rated voltage.
- 31.5 A current rating.
- Designed to IEC 60282-1 and VDE 0670 T402.
- Integrated 80 N striker for dependable switchgear operation.
- Low power dissipation design for reliable long-term performance.
- Pure silver fuse elements for consistent electrical characteristics.
- Suitable for medium voltage switchgear and transformer installations.
Key Features
- Manufacturer: Mersen.
- Series: Limitor®-PD Back-up Fuses.
- Catalogue number: 45DB240V32PD.
- Rated voltage: 24 kV AC.
- Rated current: 31.5 A.
- Fuse dimensions: Ø56 mm × 442 mm.
- Breaking capacity: 63 kA.
- Minimum breaking current: 125 A.
- Integrated 80 N striker.
- Ceramic body with silver fuse elements.
The Mersen Limitor®-PD range is engineered specifically to protect medium voltage transformers against high prospective fault currents. The L1000257 rapidly interrupts short-circuit faults, helping minimise equipment damage while supporting the continued reliability of electrical distribution systems.
Its precision-manufactured silver fuse elements, ceramic construction and integrated striker provide dependable operation within substations, industrial switchgear and utility distribution networks.
Typical Applications
- Medium voltage distribution transformers.
- Utility substations.
- Industrial electrical distribution.
- Medium voltage switchgear.
- Renewable energy infrastructure.
- Power generation facilities.
- Commercial and industrial electrical installations.
