Why Choose the Mersen Z1000246 High-Voltage Transformer Fuse?
The Mersen Z1000246, catalogue reference 45DB120V50PD, is a high-performance DIN high-voltage back-up fuse-link engineered to provide dependable protection for power transformers operating in medium-voltage electrical distribution systems. Part of the proven Mersen Limitor®-PD series, it is specifically designed to interrupt high short-circuit currents while protecting valuable transformers and switchgear from thermal and mechanical damage.
Rated at 12 kV AC and 50 A, the Z1000246 delivers excellent current-limiting performance with a high 63 kA breaking capacity. The integrated 80 N striker provides reliable mechanical indication and can be used with compatible switchgear tripping mechanisms for enhanced system safety.
Manufactured using a durable ceramic body, pure silver fuse elements and silver-plated copper terminals, this fuse-link complies with IEC 60282-1 and VDE T402 requirements, making it ideal for demanding industrial, utility and infrastructure applications.
Key Advantages
- High-voltage DIN back-up fuse for transformer protection.
- 12 kV AC voltage rating for medium-voltage networks.
- 50 A rated current for transformer applications.
- 63 kA breaking capacity for dependable fault interruption.
- Current-limiting operation reduces fault energy.
- Integrated 80 N striker for indication and switchgear operation.
- High-quality ceramic construction with pure silver fuse elements.
- Designed in accordance with IEC 60282-1 and VDE T402.
Key Features
- Mersen Limitor®-PD back-up fuse series.
- 12 kV AC IEC rated voltage.
- 50 A rated current.
- 63 kA maximum breaking capacity.
- 190 A minimum interrupting rating.
- 25.3 kA²s clearing I²t.
- 62 W power dissipation at rated current.
- Mechanical striker indication.
- Silver-plated copper cylindrical terminals.
- Ceramic insulating body.
The Mersen Z1000246 is designed to interrupt high fault currents before they can damage transformers and associated switchgear. Its current-limiting characteristics help minimise thermal and mechanical stress while maintaining the reliability of medium-voltage power distribution systems.
Designed for use with suitably coordinated protection equipment, the Limitor®-PD range offers dependable protection for transformer installations, substations and industrial power networks requiring high fault-clearing capability.
Typical Applications
- Medium-voltage transformer protection.
- Utility substations.
- Industrial electrical distribution.
- High-voltage switchgear.
- Ring main units.
- Infrastructure and energy facilities.
