Why Choose the Mersen G1000253 High-Voltage Fuse?
The Mersen G1000253, also identified by catalogue number 45DB240V10PD, is a high-voltage DIN back-up fuse-link designed to protect medium-voltage transformers against the damaging effects of short-circuit currents. As part of the established Mersen Limitor®-PD fuse range, it provides dependable current-limiting protection for high-voltage switchgear, controlgear and electrical distribution installations.
Rated at 10 A and 24 kV AC, the G1000253 is engineered to interrupt high fault currents rapidly. Its current-limiting action helps reduce the peak current and energy passing through the protected transformer, limiting thermal and mechanical stress on windings, conductors and switchgear components.
The fuse features a durable ceramic body, pure silver fuse elements and silver-coated copper end caps. An integrated 80 N medium striker can operate compatible switchgear mechanisms or provide visual and electrical indication when the fuse has operated. Its DIN-format construction measures approximately 56 mm in diameter and 442 mm in length.
Key Advantages
- Reliable high-voltage back-up fuse for transformer protection.
- 24 kV AC voltage rating for medium-voltage power systems.
- 10 A rated current for compatible transformer installations.
- High breaking capacity for effective short-circuit protection.
- Strong current limitation helps minimise fault-related equipment damage.
- Integrated 80 N striker for indication or switchgear operation.
- Suitable for both indoor and outdoor applications when installed in appropriate equipment.
Key Features
- Mersen Limitor®-PD back-up fuse series.
- DIN high-voltage cartridge fuse-link.
- 24 kV AC rated voltage.
- 10 A rated current.
- 63 kA breaking capacity at the rated voltage.
- Approximately 56 mm body diameter.
- Approximately 442 mm overall length.
- 80 N medium striker mechanism.
- Pure silver fuse elements for consistent interruption performance.
- Silver-coated copper end caps and robust ceramic body.
- Designed for installation in a compatible high-voltage fuse holder.
- RoHS-compliant construction.
The Mersen G1000253 is a back-up fuse, which means it is specifically designed to interrupt high fault currents above its minimum breaking current. It is commonly coordinated with other protective equipment to provide comprehensive protection for medium-voltage transformers and distribution systems.
During a severe short circuit, the fuse elements melt rapidly and interrupt the fault before the prospective current reaches its maximum value. This current-limiting performance helps protect transformer windings, busbars, cables and switchgear while reducing the risk of extensive system damage and unplanned downtime.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear and controlgear.
- Transformer feeder panels.
- Fuse-switch combination units.
- Industrial electrical distribution networks.
- Commercial and infrastructure power systems.
- Indoor and outdoor medium-voltage substations.
