Why Choose the Mersen H1000254 High-Voltage Fuse?
The Mersen H1000254, catalogue number 45DB240V16PD, is a high-voltage DIN back-up fuse-link designed to protect medium-voltage transformers against damaging short-circuit currents. It forms part of the proven Mersen Limitor®-PD range, developed for reliable transformer protection within high-voltage switchgear, controlgear and electrical distribution systems.
Rated at 24 kV AC and 16 A, the H1000254 provides rapid current-limiting fault interruption. By restricting the peak current and energy transmitted during a short circuit, the fuse helps reduce thermal and mechanical stress on transformer windings, cables, busbars and associated switchgear components.
The fuse is manufactured with pure silver fuse elements, silver-coated copper end caps and a robust ceramic body. Its integrated 80 N striker can operate compatible switchgear mechanisms or provide an indication after fuse operation. The DIN-format construction measures approximately 56 mm in diameter and 442 mm in length.
Key Advantages
- Purpose-designed high-voltage back-up fuse for transformer protection.
- 24 kV AC rated voltage for medium-voltage distribution systems.
- 16 A rated current for compatible transformer circuits.
- Current-limiting operation helps reduce fault energy and equipment damage.
- Integrated 80 N striker supports switchgear tripping or indication.
- Robust ceramic construction for demanding electrical environments.
- Pure silver fuse elements provide consistent interruption performance.
- Designed in accordance with recognised high-voltage fuse standards.
Key Features
- Mersen Limitor®-PD back-up fuse series.
- DIN high-voltage transformer fuse-link.
- 24 kV AC IEC rated voltage.
- 16 A rated current.
- 56 mm fuse body diameter.
- 442 mm overall length.
- 80 N striker mechanism.
- Back-up current-limiting operating characteristic.
- Pure silver fuse elements.
- Silver-coated copper end caps.
- Durable ceramic insulating body.
- Suitable for compatible DIN high-voltage fuse holders.
The Mersen H1000254 is classified as a back-up fuse, meaning it is designed to interrupt high fault currents above its specified minimum breaking current. It should be coordinated with suitable overload protection to provide comprehensive protection across the transformer circuit's required operating range.
When a severe short circuit occurs, the fuse elements melt rapidly and limit the current before it reaches its full prospective peak. This helps protect transformer windings, switchgear, cables and busbars while reducing the potential for extensive equipment damage and prolonged operational downtime.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear and controlgear.
- Transformer feeder panels.
- Fuse-switch combination units.
- Industrial electrical distribution systems.
- Utility substations.
- Commercial and infrastructure power networks.
- Medium-voltage panel assemblies.
