Why Choose the Mersen Y1018323 High-Voltage Transformer Fuse?
The Mersen Y1018323, catalogue reference 45DB240V63PTS, 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®-PTS series, it combines dependable current-limiting protection with low power dissipation and an integrated thermal striker.
Rated at 24 kV AC and 63 A, the Y1018323 is engineered for use with air-insulated and gas-insulated high-voltage switchgear. Its low-loss fuse-element design improves energy efficiency, while rapid fault interruption helps reduce electrical, thermal and mechanical stress on transformers and associated distribution equipment.
The fuse-link features pure silver fuse elements, silver-coated copper end caps and a robust ceramic body. Its VDE T402 DIN format measures 78 mm in diameter and 442 mm in length, while the integrated 80 N thermal striker helps prevent overheating in the switchgear fuse compartment and can operate compatible switching mechanisms.
Key Advantages
- Reliable high-voltage transformer short-circuit protection.
- 24 kV AC voltage rating for high-voltage distribution systems.
- 63 A rated current for suitable transformer applications.
- Low power dissipation improves energy efficiency and reduces heat generation.
- Current-limiting operation helps reduce peak fault-current stresses.
- Integrated 80 N thermal striker helps prevent fuse-compartment overheating.
Key Features
- Mersen Limitor®-PTS high-voltage DIN back-up fuse-link.
- Catalogue number: 45DB240V63PTS.
- Rated voltage: 24 kV AC.
- Rated current: 63 A.
- Total clearing I²t: 63 kA²s at rated voltage.
- Fuse dimensions: 78 mm diameter × 442 mm length.
- Thermal striker: 80 N.
- Low switching voltage and reduced power losses.
- Pure silver fuse elements and silver-coated copper end caps.
- Suitable for indoor and outdoor high-voltage installations.
Back-up fuse-links such as the Mersen Y1018323 are designed to interrupt substantial short-circuit currents in transformer circuits. Their current-limiting action reduces the fault energy passed into the protected installation, helping minimise damage to transformers, cables and high-voltage switchgear.
The Limitor®-PTS design uses optimised fuse elements to reduce power losses and heat generation during normal operation. Its thermal striker also helps prevent excessive temperatures within the fuse compartment, making the fuse particularly suitable for compact air-insulated and gas-insulated switchgear.
Typical Applications
- High-voltage distribution transformer protection.
- Gas-insulated switchgear systems.
- Air-insulated switchgear systems.
- Compact high-voltage switchgear assemblies.
- Electrical substations and utility networks.
- Industrial high-voltage distribution systems.
