Why Choose the Mersen Z209368 High-Voltage Transformer Fuse?
The Mersen Z209368, catalogue reference 45DB360V40PD, is a premium DIN high-voltage back-up fuse-link developed to provide reliable protection for medium-voltage power transformers. Part of the proven Mersen Limitor®-PD series, it is engineered to safely interrupt high short-circuit currents while minimising thermal and mechanical stress on transformers and associated switchgear.
Rated at 36 kV AC and 40 A, the Z209368 delivers a maximum breaking capacity of 20 kA. Its current-limiting characteristics help reduce fault energy, protecting valuable electrical equipment and improving the reliability of industrial and utility power distribution systems.
Manufactured using a ceramic body, pure silver fuse elements and silver-plated copper terminals, the fuse-link complies with IEC 60282-1 and VDE 0670 T402. An integrated 80 N striker provides reliable operation indication and can actuate compatible switchgear tripping mechanisms.
Key Advantages
- DIN high-voltage back-up fuse-link for transformer protection.
- 36 kV AC rated voltage for medium-voltage systems.
- 40 A rated current for transformer applications.
- 20 kA breaking capacity for dependable fault interruption.
- Current-limiting operation reduces thermal and mechanical fault stress.
- Integrated 80 N striker for indication and switchgear tripping.
- Pure silver fuse elements for dependable long-term performance.
- Designed in accordance with IEC 60282-1 and VDE 0670 T402.
Key Features
- Mersen Limitor®-PD back-up fuse series.
- 36 kV AC IEC rated voltage.
- 40 A rated current.
- 20 kA maximum breaking capacity.
- 205 A minimum interrupting current.
- 14.2 kA²s clearing I²t.
- 176 W power dissipation.
- Standard 80 N striker.
- Silver-plated copper cylindrical terminals.
- Ceramic insulating body with pure silver fuse elements.
The Mersen Z209368 rapidly interrupts severe short-circuit currents before they can damage transformer windings, switchgear and associated electrical equipment. Its current-limiting performance helps minimise peak fault current and thermal stress, improving the safety and reliability of medium-voltage power systems.
As a back-up fuse-link, the Z209368 should be coordinated with suitable overload protection devices to provide comprehensive transformer protection in industrial, commercial and utility installations.
Typical Applications
- Medium-voltage transformer protection.
- Industrial electrical distribution systems.
- Utility substations.
- Air insulated switchgear.
- High-voltage switchgear.
- Infrastructure and renewable energy installations.
