Why Choose the Mersen V1000242 High Voltage DIN Back-up Fuse?
The Mersen V1000242 is a high-performance Limitor®-PD high voltage DIN back-up fuse designed to protect transformers against damaging short-circuit currents. Also identified by catalogue number 45DB120V20PD, it is suitable for medium voltage switchgear, controlgear and electrical distribution systems requiring dependable fault interruption.
Manufactured in accordance with IEC 60282-1 and VDE 0670 T402, the V1000242 combines a ceramic insulating body with pure silver fuse elements and silver-plated copper terminals. These high-quality materials provide reliable electrical performance, consistent operating characteristics and a long service life in demanding utility and industrial installations.
With a rated voltage of 12 kV AC, a rated current of 20 A and an integrated 80 N striker, the Mersen V1000242 provides effective transformer protection while supporting fuse operation indication and compatible switchgear tripping mechanisms.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for high voltage electrical systems.
- 20 A rated current for compatible transformer circuits.
- High 80 kA breaking capacity for dependable fault interruption.
- Integrated 80 N striker for indication and switchgear operation.
- Premium ceramic and silver construction supports reliable long-term performance.
Key Features
- Mersen Limitor®-PD series.
- Catalogue number: 45DB120V20PD.
- 12 kV AC IEC rated voltage.
- 20 A rated current.
- DIN high voltage back-up fuse construction.
- 80 N integrated striker mechanism.
- Pure silver fuse elements and silver-plated copper terminals.
- Compliant with IEC 60282-1 and VDE 0670 T402.
High voltage back-up fuses are designed to interrupt significant short-circuit currents before they cause extensive damage to transformers, cables and switchgear. The Mersen V1000242 provides reliable current limitation and fault clearance for transformer circuits operating at voltages up to 12 kV AC.
The integrated striker provides a clear indication when the fuse has operated and can actuate a compatible switchgear mechanism. This helps isolate all phases following a fault, supports faster maintenance and improves the overall safety of the electrical installation.
Typical Applications
- Medium voltage 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.
