Why Choose the Mersen F1000574 High-Voltage Back-Up Fuse?
The Mersen F1000574, catalogue reference 45DB175V100P, is a high-voltage DIN back-up fuse-link developed to protect distribution transformers against the damaging effects of high short-circuit currents. Part of the Mersen Limitor®-P series, it provides dependable current limitation and reliable fault interruption for medium-voltage switchgear and transformer installations.
Rated at 17.5 kV AC and 100 A, the F1000574 is designed for installation in compatible air-insulated and gas-insulated switchgear. Its ceramic fuse body, pure silver fuse elements and silver-plated copper terminals provide excellent electrical performance and long operational life.
An integrated 80 N striker provides positive mechanical indication and can operate compatible switchgear trip mechanisms when the fuse clears a fault. With a high 63 kA breaking capacity, the F1000574 offers dependable transformer protection for industrial, commercial and utility applications.
Key Advantages
- High-voltage DIN back-up fuse for transformer protection.
- 17.5 kV AC rated voltage.
- 100 A rated current.
- 63 kA breaking capacity for dependable fault interruption.
- Integrated 80 N striker for indication and switchgear operation.
- Current-limiting design reduces thermal and mechanical fault stresses.
- Ceramic construction with pure silver fuse elements.
- Suitable for industrial, commercial and utility medium-voltage installations.
Key Features
- Mersen Limitor®-P back-up fuse series.
- Manufacturer item number F1000574.
- Catalogue number 45DB175V100P.
- 17.5 kV AC IEC rated voltage.
- 100 A rated current.
- 63 kA maximum breaking capacity.
- 500 A minimum breaking current.
- Total clearing I²t of 200 kA²s.
- Power dissipation of approximately 280 W.
- Integrated 80 N standard striker.
- DIN clip-mounted construction.
- Complies with IEC 60282-1.
The Mersen F1000574 is engineered to interrupt high fault currents before they can damage transformers and associated switchgear. Its current-limiting characteristics reduce thermal and mechanical stress while helping improve equipment reliability and minimise downtime.
As a back-up fuse-link, the F1000574 should be coordinated with suitable overload protection. Correct selection should consider transformer rating, prospective fault current and switchgear requirements to achieve optimum system protection.
Typical Applications
- Distribution transformer protection.
- Medium-voltage substations.
- Industrial electrical distribution.
- Air-insulated switchgear.
- Gas-insulated switchgear.
- Utility power networks.
- Renewable energy transformer installations.
- Commercial medium-voltage power systems.
