Why Choose the Mersen Y1000291 High-Voltage Transformer Fuse?
The Mersen Y1000291, catalogue reference 45DB360V32PTD, is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the thermal and dynamic effects of short-circuit currents. Part of the advanced Mersen Limitor®-PTD series, it combines effective current limitation with controlled power dissipation for dependable integration with high-voltage switchgear.
Rated at 36 kV AC and 31.5 A, the Y1000291 rapidly interrupts substantial fault currents before they reach their maximum prospective peak. This helps reduce the electrical, thermal and mechanical stresses placed on transformers, cables, conductors and associated switchgear during severe short-circuit conditions.
The fuse-link features pure silver fuse elements, silver-plated copper terminals and a robust ceramic body. Its DIN fuse size measures 65 mm in diameter and 537 mm in length, while the integrated 80 N thermal striker supports operation with compatible air-insulated and gas-insulated switchgear.
Key Advantages
- Dependable high-voltage transformer short-circuit protection.
- 36 kV AC voltage rating for high-voltage distribution systems.
- 31.5 A rated current for suitable transformer applications.
- Controlled power dissipation supports reliable switchgear coordination.
- Current-limiting operation helps reduce peak fault current and incident energy.
- Integrated 80 N thermal striker for switchgear operation and indication.
Key Features
- Mersen Limitor®-PTD high-voltage DIN back-up fuse-link.
- Catalogue number: 45DB360V32PTD.
- Rated voltage: 36 kV AC.
- Rated current: 31.5 A.
- Breaking capacity: 20 kA.
- Minimum interrupting rating: 135 A.
- Total clearing I²t: 7 kA²s at rated voltage.
- Fuse size: 65 mm diameter × 537 mm length.
- Thermal striker force: 80 N.
- Suitable for compatible air-insulated and gas-insulated switchgear.
Back-up fuse-links such as the Mersen Y1000291 are designed to interrupt high short-circuit currents above their specified minimum interrupting level. They are used in combination with suitable switching or protection equipment to protect transformers across the required operating and fault-current range.
The Limitor®-PTD design incorporates controlled power dissipation and a thermal striker for dependable coordination with compatible high-voltage switchgear. During a severe fault, the fuse elements operate rapidly to limit the current and reduce the energy transferred into the transformer and surrounding electrical installation.
Typical Applications
- High-voltage distribution transformer protection.
- HV/LV transformer installations.
- Air-insulated switchgear systems.
- Gas-insulated switchgear systems.
- Electrical substations and utility networks.
- Industrial high-voltage distribution systems.
