Why Choose the Mersen A1000155 High-Voltage General Purpose Fuse?
The Mersen A1000155, catalogue number 45DG120V40P, is a premium DIN high-voltage general purpose fuse-link developed for reliable transformer protection in medium-voltage electrical systems. As part of the trusted Mersen Limitor®-G series, it provides dependable protection against both low overcurrents and high short-circuit currents in accordance with IEC 60282-1.
Designed using pure silver fuse elements, silver-plated copper terminals and a durable ceramic body, the A1000155 delivers outstanding electrical performance and long operational life. An integrated 80 N striker provides positive fuse operation indication and can actuate compatible switchgear trip mechanisms for enhanced system safety.
With a 12 kV AC IEC voltage rating, 40 A current rating and a 40 kA breaking capacity, this fuse is ideally suited to protecting distribution transformers, switchgear and medium-voltage power systems where dependable fault protection is essential.
Key Advantages
- Designed for medium-voltage transformer protection.
- 12 kV AC IEC rated voltage.
- 40 A rated current.
- 40 kA breaking capacity.
- General purpose protection against low overcurrents and short circuits.
- Integrated 80 N striker for fuse indication and switchgear operation.
- High-quality ceramic construction with silver-plated terminals.
Key Features
- Mersen Limitor®-G general purpose fuse-link.
- Manufacturer part number: A1000155.
- Catalogue number: 45DG120V40P.
- Rated voltage: 12 kV AC.
- Rated current: 40 A.
- Breaking capacity: 40 kA.
- Fuse dimensions: 78 × 292 mm.
- Integrated striker: 80 N.
- Clip mounting with cylindrical terminals.
- General purpose transformer protection in accordance with IEC 60282-1.
The Mersen A1000155 provides general purpose protection for distribution transformers by interrupting both low overcurrents and severe short-circuit faults before they can damage valuable electrical equipment. Its current-limiting design helps reduce thermal and mechanical stresses throughout the protected installation.
The integrated striker mechanism provides positive mechanical indication following fuse operation and can actuate compatible switchgear tripping devices, helping maintenance engineers quickly identify faults and minimise downtime.
Typical Applications
- Medium-voltage distribution transformers.
- High-voltage switchgear.
- Transformer substations.
- Industrial electrical distribution.
- Utility infrastructure.
- Indoor and outdoor medium-voltage installations.
- Fuse-switch combinations.
