Why Choose the Mersen M1000120 High Voltage Transformer Fuse?
The Mersen M1000120 is a premium Limitor®-PT DIN high voltage back-up fuse-link developed to provide dependable short-circuit protection for medium voltage transformers. Manufactured in accordance with IEC 60282-1, it forms part of Mersen's proven Limitor®-PT range with Controlled Power Dissipation (CPD), delivering reliable transformer protection in utility, industrial and infrastructure applications.
Constructed using pure silver fuse elements, silver-coated copper end caps and a robust ceramic body, the M1000120 provides excellent electrical performance and long service life. Its integrated 80 N thermal striker enables dependable operation with compatible medium voltage switchgear and protection systems.
With a rated voltage of 12 kV AC, a rated current of 2 A and compact dimensions of 56 mm diameter × 292 mm length, the M1000120 is ideal for protecting distribution transformers against damaging short-circuit currents whilst maintaining dependable operation of medium voltage electrical networks.
Key Advantages
- High voltage DIN back-up fuse-link for transformer protection.
- 12 kV AC rated voltage.
- 2 A rated current.
- Controlled Power Dissipation (CPD) design reduces thermal loading.
- 63 kA breaking capacity.
- Integrated 80 N thermal striker.
- Pure silver fuse elements with ceramic body construction.
- Manufactured to IEC 60282-1 requirements.
Key Features
- Mersen Limitor®-PT back-up fuse series.
- Catalogue number: 45DB120V2PT.
- 12 kV AC rated voltage.
- 2 A current rating.
- 56 mm diameter × 292 mm length.
- 63 kA maximum breaking capacity.
- 0.4 kA²s total clearing I²t.
- 16 A minimum breaking current.
- 80 N thermal striker.
- Controlled Power Dissipation technology.
The Mersen M1000120 is designed to interrupt high fault currents rapidly before they can damage transformers, switchgear and associated medium voltage equipment. Its current-limiting characteristics reduce thermal and mechanical stress, helping improve network reliability and minimise downtime.
The Limitor®-PT range incorporates Controlled Power Dissipation technology, reducing operating temperatures whilst maintaining dependable fault interruption performance. This makes the M1000120 particularly suitable for enclosed medium voltage switchgear and transformer protection systems.
Typical Applications
- Medium voltage transformer protection.
- Utility substations.
- Industrial power distribution systems.
- Medium voltage switchgear.
- Electrical infrastructure projects.
- Renewable energy installations.
- Commercial power distribution equipment.
