Why Choose the Mersen S209293 High Voltage DIN Back-up Fuse?
The Mersen S209293 is a reliable Limitor®-PD high voltage DIN back-up fuse designed to protect transformers, switchgear and medium voltage electrical systems against damaging short-circuit currents. Identified by the catalogue reference 45DB72V6,3PD, it provides dependable current-limiting protection for demanding power distribution installations.
Manufactured using a robust ceramic body, pure silver fuse elements and silver-plated copper end caps, the S209293 is engineered for consistent electrical performance and long-term reliability. As part of the Mersen Limitor®-PD range, it complies with recognised high voltage fuse standards and is suitable for coordinated operation with compatible transformer protection equipment.
Rated at 7.2 kV AC and 6.3 A, the fuse has a compact 56 mm diameter and 192 mm overall length. An integrated 80 N striker allows the fuse to operate compatible switch-disconnectors or indication mechanisms when a fault occurs.
Key Advantages
- Reliable medium voltage transformer short-circuit protection.
- 7.2 kV AC rated voltage for compatible distribution systems.
- 6.3 A rated current for transformer protection applications.
- Current-limiting operation helps reduce thermal and mechanical fault stresses.
- Integrated 80 N striker for coordinated switchgear operation.
- Compact DIN fuse-link format for straightforward installation.
Key Features
- Mersen Limitor®-PD series.
- High voltage DIN back-up fuse-link.
- 7.2 kV AC IEC rated voltage.
- 6.3 A rated current.
- 63 kA rated breaking capacity.
- 56 mm diameter × 192 mm length.
- Integrated 80 N striker mechanism.
- Ceramic body with pure silver fuse elements.
- Silver-plated copper end caps.
- Clip-mounted cylindrical construction.
High voltage back-up fuses interrupt substantial short-circuit currents before excessive electrical energy can damage transformers, cables or switchgear. Their current-limiting characteristics reduce peak fault current and help minimise the resulting thermal and mechanical stresses within the installation.
The Mersen S209293 is intended for use as part of a correctly coordinated transformer protection system. Its integrated striker can activate compatible switchgear or provide mechanical indication when the fuse operates, helping isolate the affected circuit and support safer maintenance.
Typical Applications
- Medium voltage transformer protection.
- Power distribution switchgear.
- Transformer substations.
- Industrial electrical networks.
- Commercial and infrastructure power systems.
- Utility distribution installations.
