Why Choose the Mersen Y1032951 High-Voltage Transformer Fuse?
The Mersen Y1032951, catalogue reference 45DB120V50PTS2, is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the damaging effects of short-circuit currents. As part of the advanced Mersen Limitor®-PTS series, it combines dependable current-limiting protection with low power dissipation and an integrated thermal striker for use in modern high-voltage switchgear.
Rated at 12 kV AC and 50 A, the Y1032951 rapidly interrupts high fault currents before they reach their maximum prospective peak. Its low-loss design helps improve energy efficiency while reducing thermal, electrical and mechanical stress on transformers, cables and associated distribution equipment.
Manufactured using a robust ceramic body, pure silver fuse elements and silver-plated copper terminals, the fuse-link measures 65 mm in diameter and 292 mm in length. The integrated 80 N thermal striker supports reliable operation with compatible air-insulated and SF6 gas-insulated switchgear.
Key Advantages
- Reliable high-voltage transformer short-circuit protection.
- 12 kV AC voltage rating for medium- and high-voltage distribution systems.
- 50 A rated current for transformer protection applications.
- Low power dissipation reduces operating losses.
- Current-limiting operation helps minimise fault energy.
- Integrated 80 N thermal striker for indication and switchgear operation.
Key Features
- Mersen Limitor®-PTS high-voltage DIN back-up fuse-link.
- Catalogue number: 45DB120V50PTS2.
- Rated voltage: 12 kV AC.
- Rated current: 50 A.
- Breaking capacity: 65 kA.
- Minimum breaking current: 190 A.
- Total clearing I²t: 25.3 kA²s.
- Fuse dimensions: 65 mm diameter × 292 mm length.
- Thermal striker: 80 N.
- Suitable for air-insulated and SF6 gas-insulated switchgear.
The Mersen Y1032951 is engineered to provide dependable transformer protection while reducing heat generation within high-voltage switchgear. Its current-limiting characteristics reduce the energy released during severe electrical faults, helping extend the service life of transformers and associated equipment.
The Limitor®-PTS design incorporates low power dissipation together with an integrated thermal striker, making it particularly suitable for compact air-insulated and SF6 gas-insulated switchgear where thermal management and dependable coordination are essential.
Typical Applications
- Distribution transformer protection.
- Medium- and high-voltage substations.
- Air-insulated switchgear (AIS).
- SF6 gas-insulated switchgear (GIS).
- Industrial electrical distribution systems.
- Utility power networks.
