MERSEN FUSE H 2409P BCKUP 442-56/20 E2409PIB.D1442/20

Why Choose the Mersen W209342 Limitor®-P High Voltage Back-up Fuse?

The Mersen W209342 is a reliable Limitor®-P high voltage DIN back-up fuse-link designed to protect medium voltage transformers against the damaging effects of short-circuit currents. As part of Mersen’s established Limitor®-P range, it is suitable for use in high voltage switchgear, controlgear and electrical distribution systems.

Manufactured in accordance with IEC 60282-1, the W209342 combines pure silver fuse elements, silver-coated copper end caps and a robust ceramic body to provide dependable electrical performance and long service life. Its integrated 80 N striker supports operation with compatible switchgear mechanisms and provides clear fuse status indication.

With a rated voltage of 24 kV AC, a rated current of 20 A and a standard DIN body measuring 56 mm in diameter and 442 mm in length, this fuse-link is suited to transformer protection in industrial substations, utility networks and medium voltage distribution installations.

Key Advantages

• Reliable medium voltage transformer protection.
• 24 kV AC voltage rating for high voltage distribution systems.
• 20 A rated current for transformer primary protection.
• Back-up fuse performance in accordance with IEC 60282-1.
• Integrated 80 N striker for compatible switchgear operation.
• High quality ceramic and silver construction for dependable long-term performance.

Key Features

• Mersen Limitor®-P back-up fuse-link.
• Catalogue number: 45DB240V20P.
• Rated voltage: 24 kV AC.
• Rated current: 20 A.
• Fuse dimensions: 56 mm diameter × 442 mm length.
• Striker force: 80 N.
• DIN high voltage fuse format.
• Designed for protection against transformer short-circuit currents.

Reliable Protection for Medium Voltage Transformers

High voltage back-up fuse-links are designed to interrupt significant fault currents before they can cause serious thermal or mechanical damage to transformers and associated switchgear. This helps improve installation safety, reduce equipment damage and minimise costly electrical downtime.

The Mersen Limitor®-P range has been used in high voltage systems for decades. Its proven construction and dependable fault-clearing performance make the W209342 a suitable protection component for new switchgear assemblies, transformer installations and maintenance replacement projects.

Typical Applications

• Medium voltage transformer primary protection.
• Industrial substations and distribution networks.
• High voltage switchgear and controlgear.
• Utility electrical infrastructure.
• Commercial and industrial power distribution.
• Transformer replacement and maintenance projects.