Why Choose the Mersen J1000255 High Voltage DIN Back-up Fuse?
The Mersen J1000255 is a dependable high voltage DIN back-up fuse designed to protect medium voltage transformers against the damaging effects of short-circuit currents. Part of the established Mersen Limitor®-PD series, this fuse-link is engineered for use in high voltage switchgear, controlgear and electrical distribution systems where reliable fault interruption is essential.
Manufactured in accordance with IEC 60282-1 and VDE 0670 T402, the J1000255 provides effective current-limiting protection for transformer installations. Its construction uses pure silver fuse elements, silver-coated copper end caps and a robust ceramic body to support consistent electrical performance and long-term reliability in demanding operating environments.
With a rated voltage of 24 kV AC, a rated current of 20 A and an integrated 80 N striker, the Mersen J1000255 is well suited to medium voltage transformer protection applications. Its standard DIN dimensions allow straightforward integration into compatible switchgear and fuse mounting systems.
Key Advantages
- Reliable back-up fuse protection for medium voltage transformers.
- 24 kV AC voltage rating for high voltage distribution systems.
- 20 A rated current for compatible transformer installations.
- Integrated 80 N striker for operation with switchgear mechanisms.
- Complies with IEC 60282-1 and VDE 0670 T402.
- Premium silver, copper and ceramic construction supports dependable performance.
Key Features
- Mersen Limitor®-PD high voltage DIN back-up fuse.
- Catalogue number: 45DB240V20PD.
- 24 kV AC rated voltage.
- 20 A rated current.
- 56 mm diameter and 442 mm length.
- Integrated 80 N striker.
- Designed specifically for transformer short-circuit protection.
- RoHS-compliant construction.
High voltage back-up fuses are used to interrupt substantial short-circuit currents before they can cause severe thermal or mechanical damage to transformers and associated distribution equipment. Their current-limiting operation helps reduce the energy passed into the protected circuit during a fault.
The Mersen Limitor®-PD range is developed for reliable use in high voltage switchgear and transformer protection systems. The integrated striker can interact with compatible switchgear mechanisms to provide mechanical indication or initiate disconnection when the fuse operates.
Typical Applications
- Medium voltage transformer protection.
- High voltage switchgear assemblies.
- Electrical substations and distribution networks.
- Industrial medium voltage power systems.
- Utility transformer installations.
- OEM switchgear and controlgear equipment.
