Why Choose the Mersen X209366 High-Voltage Fuse?
The Mersen X209366, catalogue reference 45DB360V25PD, is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the damaging effects of short-circuit currents. As part of the established Mersen Limitor®-PD series, it provides dependable protection for high-voltage switchgear, controlgear and electrical distribution systems.
Rated at 36 kV AC and 25 A, the X209366 delivers rapid current-limiting operation during severe electrical faults. By interrupting a short-circuit current before it reaches its maximum prospective peak, the fuse helps reduce the thermal, electrical and mechanical stresses placed on transformers and associated high-voltage equipment.
The fuse-link features a robust ceramic body, pure silver fuse elements and silver-coated copper end caps for consistent electrical performance. Its DIN-format construction measures 56 mm in diameter and 537 mm in length, while the integrated 80 N striker can operate compatible switchgear mechanisms or provide an indication when the fuse has operated.
Key Advantages
- Dependable high-voltage transformer short-circuit protection.
- 36 kV AC voltage rating for high-voltage distribution systems.
- 25 A rated current for coordinated transformer protection.
- Current-limiting operation helps reduce peak fault-current stresses.
- Integrated 80 N striker for switchgear operation or indication.
- High-quality ceramic, silver and copper construction.
Key Features
- Mersen Limitor®-PD back-up fuse-link.
- Catalogue number: 45DB360V25PD.
- Rated voltage: 36 kV AC.
- Rated current: 25 A.
- Fuse dimensions: 56 mm diameter × 537 mm length.
- Striker force: 80 N.
- Pure silver fuse elements for reliable fault interruption.
- Silver-coated copper end caps for effective conductivity.
- DIN-format design for compatible high-voltage fuse installations.
Back-up fuse-links such as the Mersen X209366 are designed to interrupt substantial short-circuit currents above their specified minimum breaking-current level. They are normally coordinated with suitable switching devices or additional protection equipment to provide effective transformer protection across the required fault-current range.
During a severe fault, the fuse elements operate rapidly and interrupt the current within the ceramic fuse body. This current-limiting action reduces the energy passed into the protected installation, helping minimise damage to transformers, cables, conductors and high-voltage switchgear.
Typical Applications
- High-voltage distribution transformer protection.
- HV/LV transformer installations.
- Electrical substations and utility networks.
- High-voltage switchgear and controlgear.
- Industrial electrical distribution systems.
- Transformer panels and fused switch combinations.
