Why Choose the Mersen K209309 High Voltage DIN Back-up Fuse?
The Mersen K209309 is a premium DIN high voltage back-up fuse engineered to provide reliable short-circuit protection for medium voltage transformers operating within electrical distribution systems. Part of the trusted Mersen Limitor®-P series, this fuse-link is specifically designed for transformer protection in substations, industrial switchgear and utility power networks.
Manufactured in accordance with IEC 60282-1, the K209309 delivers excellent current-limiting performance whilst helping to minimise thermal and mechanical stress during fault conditions. Premium construction using pure silver fuse elements, silver-plated copper end caps and a ceramic body ensures dependable operation and a long service life.
With a rated voltage of 12 kV AC, a 25 A current rating and an integrated 80 N thermal striker, the Mersen K209309 is ideally suited for transformer protection in medium voltage electrical installations where dependable fault interruption is essential.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for high voltage distribution systems.
- 25 A rated current for compatible transformer installations.
- Integrated 80 N thermal striker for compatible switchgear mechanisms.
- Current-limiting design reduces fault energy and equipment damage.
- Manufactured in accordance with IEC 60282-1.
Key Features
- Mersen Limitor®-P high voltage DIN back-up fuse.
- Catalogue number: 45DB120V25P.
- 12 kV AC rated voltage.
- 25 A rated current.
- 56 mm diameter × 292 mm length.
- Integrated 80 N thermal striker.
- Ceramic body with pure silver fuse elements.
- Designed for transformer protection applications.
High voltage back-up fuse-links rapidly interrupt prospective short-circuit currents before they can damage transformers and associated switchgear. Their current-limiting characteristics help reduce thermal and mechanical stress, improving equipment reliability whilst helping minimise maintenance requirements.
The Mersen Limitor®-P range has been trusted worldwide for dependable transformer protection in substations, industrial facilities and utility distribution systems, delivering consistent current-limiting performance under demanding operating conditions.
Typical Applications
- Medium voltage transformer protection.
- Electrical substations.
- Medium voltage switchgear.
- Industrial power distribution.
- Utility electrical networks.
- OEM medium voltage equipment.
