Why Choose the Mersen Z1000131 High-Voltage Transformer Fuse?
The Mersen Z1000131, catalogue reference 45DB120V80PT, is a high-performance DIN high-voltage back-up fuse-link designed to protect power transformers against the damaging thermal and dynamic effects of short-circuit currents. It forms part of the Mersen Limitor®-PT series, developed specifically for dependable transformer protection in high-voltage switchgear and electrical distribution systems.
Rated at 12 kV AC and 80 A, this fuse-link combines high current-limiting performance with a breaking capacity of up to 63 kA. Its controlled power dissipation design supports effective thermal management, while the integrated striker provides clear mechanical indication and can assist with switchgear tripping or interlocking functions.
The Z1000131 features a robust ceramic body, pure silver fuse elements and silver-plated copper cylindrical terminals. Its VDE T4 design, clip mounting arrangement and compliance with IEC 60282-1 make it suitable for use in professionally engineered medium-voltage transformer protection systems.
Key Advantages
- High-voltage back-up fuse-link for transformer protection.
- 12 kV AC voltage rating for medium-voltage distribution systems.
- 80 A rated current for suitable transformer applications.
- High 63 kA breaking capacity for reliable fault interruption.
- Controlled power dissipation supports improved thermal performance.
- Integrated 80 N striker for indication and switchgear operation.
- Durable ceramic body with pure silver fuse elements.
- Designed in accordance with IEC 60282-1 requirements.
Key Features
- Mersen Limitor®-PT back-up fuse series.
- 12 kV AC IEC rated voltage.
- 80 A ampere rating.
- 63 kA maximum breaking capacity.
- 350 A minimum interrupting rating.
- 115 kA²s clearing I²t at rated voltage.
- VDE T4 design configuration.
- Mechanical striker indication system.
- Silver-plated copper cylindrical terminals.
- Ceramic insulating body for high dielectric and thermal performance.
High-voltage back-up fuse-links are designed to interrupt high fault currents before they can cause severe thermal or mechanical damage to transformers, switchgear and connected distribution equipment. The Mersen Z1000131 limits the peak value and duration of short-circuit currents, helping reduce stress on valuable electrical assets.
As a back-up fuse, the Z1000131 must be coordinated with suitable associated protection equipment for lower-level overcurrents. Correct fuse selection should consider transformer rating, inrush current, system voltage, minimum interrupting current and the protection characteristics of upstream and downstream devices.
Typical Applications
- Medium-voltage power transformer protection.
- High-voltage switchgear and controlgear assemblies.
- Industrial electrical distribution systems.
- Utility transformer substations.
- Transformer feeder panels and ring main units.
- Commercial and industrial power infrastructure.
