Why Choose the Mersen V1018320 High Voltage DIN Back-up Fuse?
The Mersen V1018320 is a high-performance Limitor®-PTS high voltage DIN back-up fuse developed for dependable transformer protection in medium voltage electrical systems. Also identified by catalogue number 45DB120V160PTS3, it combines low power dissipation with an integrated thermal striker to support reliable operation in high voltage switchgear and controlgear.
The Limitor®-PTS range incorporates advanced fuse-element designs that reduce power losses during normal operation. Its thermal striker also helps protect against excessive temperatures inside the switchgear fuse compartment, supporting improved equipment safety and dependable long-term performance.
With a rated voltage of 12 kV AC, a rated current of 160 A and an integrated 80 N thermal striker, the Mersen V1018320 is suitable for protecting distribution transformers and associated medium voltage equipment. Its 78 mm diameter and 442 mm length DIN format enables installation in compatible high voltage fuse bases and switchgear assemblies.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for compatible high voltage systems.
- 160 A rated current for high-capacity transformer circuits.
- Low power dissipation helps reduce heat generation and operating losses.
- Integrated 80 N thermal striker supports indication and switchgear operation.
- DIN-standard construction simplifies integration into compatible protection assemblies.
Key Features
- Mersen Limitor®-PTS series.
- Catalogue number: 45DB120V160PTS3.
- 12 kV AC IEC rated voltage.
- 160 A rated current.
- High voltage DIN back-up fuse for transformer protection.
- 80 N integrated thermal striker.
- Low-loss fuse-element design.
- VDE T402 design for medium voltage applications.
High voltage back-up fuses protect transformers and associated switchgear by limiting and interrupting significant short-circuit currents. The Mersen V1018320 is engineered to remain stable during normal transformer operation while responding effectively when high-level electrical faults occur.
The low-loss construction helps minimise heat generated within the fuse compartment. Its thermal striker can provide fuse operation indication or actuate compatible switchgear mechanisms, while also helping prevent excessive compartment temperatures under abnormal operating conditions.
Typical Applications
- Medium voltage distribution transformer protection.
- High voltage switchgear and controlgear.
- Electrical distribution substations.
- Ring main units and transformer feeders.
- Industrial medium voltage power systems.
- Utility and infrastructure distribution networks.
