Why Choose the Mersen Y1014919 High-Voltage Transformer Fuse?
The Mersen Y1014919, catalogue reference 45DB120V250P, 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 trusted Mersen Limitor®-P series, it delivers dependable protection for high-voltage switchgear, controlgear and electrical distribution systems.
Rated at 12 kV AC and 250 A, the Y1014919 provides rapid current-limiting protection by interrupting high fault currents before they reach their maximum prospective peak. This helps minimise thermal, electrical and mechanical stress on transformers, cables and associated high-voltage equipment.
Constructed with a robust ceramic body, pure silver fuse elements and silver-plated copper terminals, the fuse is built for long service life in demanding environments. Its VDE T4 DIN format measures 88 mm in diameter and 292 mm in length and incorporates an integrated 80 N striker for indication and compatible switchgear operation.
Key Advantages
- Reliable high-voltage transformer short-circuit protection.
- 12 kV AC voltage rating for medium- and high-voltage systems.
- 250 A rated current for demanding transformer applications.
- High 63 kA breaking capacity for reliable fault interruption.
- Current-limiting operation helps reduce fault energy and equipment damage.
- Integrated 80 N striker for indication and switchgear operation.
Key Features
- Mersen Limitor®-P DIN back-up fuse-link.
- Catalogue number: 45DB120V250P.
- Rated voltage: 12 kV AC.
- Rated current: 250 A.
- Breaking capacity: 63 kA.
- Minimum interrupting rating: 740 A.
- Fuse dimensions: 88 mm diameter × 292 mm length.
- 80 N striker for indication and switchgear operation.
- Pure silver fuse elements with silver-plated copper terminals.
- DIN clip-mounted VDE T4 design.
The Mersen Y1014919 is designed to provide dependable protection for distribution transformers operating within medium- and high-voltage electrical networks. Its current-limiting characteristics reduce the energy released during severe electrical faults, helping extend the service life of transformers and associated switchgear.
As a back-up fuse-link in accordance with IEC 60282-1, it is intended to interrupt high fault currents above its minimum interrupting rating and should be coordinated with suitable switching equipment for complete transformer protection.
Typical Applications
- Distribution transformer protection.
- Medium- and high-voltage substations.
- Industrial electrical distribution systems.
- High-voltage switchgear and controlgear.
- Utility power distribution networks.
- Critical infrastructure power systems.
