Why Choose the Mersen D1000273 High Voltage Transformer Fuse?
The Mersen D1000273 is a high quality DIN high voltage back-up fuse designed to protect medium voltage transformers against the thermal and dynamic effects of short-circuit currents. Part of the proven Mersen Limitor®-PTD range, it is engineered for coordinated use with air-insulated and gas-insulated switchgear in demanding electrical distribution systems.
This fuse-link features controlled power dissipation, helping to manage heat generation within compact switchgear assemblies. Its construction incorporates pure silver fuse elements, silver-coated copper end caps and a durable ceramic body, providing dependable electrical performance, strong insulation and long-term mechanical reliability.
With a rated voltage of 12 kV AC, a rated current of 125 A and an integrated 80 N thermal striker, the D1000273 is suitable for protecting distribution transformers in industrial facilities, utility substations and infrastructure installations. Its VDE T402 format measures 88 mm in diameter and 292 mm in length.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for high voltage distribution systems.
- 125 A rated current.
- Controlled power dissipation helps manage heat inside switchgear.
- Integrated 80 N thermal striker for compatible switching mechanisms.
- Pure silver fuse elements provide reliable fault interruption.
- Robust ceramic body offers excellent electrical and mechanical strength.
- Suitable for use with air-insulated and gas-insulated switchgear.
Key Features
- Mersen Limitor®-PTD high voltage fuse range.
- 12 kV AC rated voltage.
- 125 A rated current.
- VDE T402 DIN fuse format.
- 88 mm diameter and 292 mm length.
- Integrated 80 N thermal striker.
- Controlled power dissipation construction.
- Pure silver fuse elements.
- Silver-coated copper end caps.
- Durable ceramic fuse body.
High voltage back-up fuses such as the Mersen D1000273 interrupt severe short-circuit currents before they can cause extensive thermal or mechanical damage to transformers and associated switchgear. They are normally coordinated with suitable switching and overload protection equipment to provide comprehensive protection across the installation.
The Limitor®-PTD range combines dependable fuse operation with controlled power dissipation, making it particularly suitable for compact switchgear where internal temperature management is important. The D1000273 provides a robust protection solution for modern industrial and utility distribution networks.
Typical Applications
- Medium voltage transformer protection.
- Air-insulated switchgear.
- Gas-insulated switchgear.
- Utility substations and distribution networks.
- Industrial electrical distribution systems.
- Renewable energy substations.
- OEM medium voltage switchgear assemblies.
- Transformer feeder protection.
