Why Choose the Mersen T1000149 High Voltage DIN Back-up Fuse?
The Mersen T1000149 is a premium Limitor®-PT high voltage DIN back-up fuse engineered to provide dependable short-circuit protection for medium voltage transformers. Identified by catalogue number 45DB240V100PT, it incorporates controlled power dissipation (CPD) technology to reduce heat build-up within enclosed switchgear whilst maintaining outstanding fault interruption performance.
Designed in accordance with IEC 60282-1, the Limitor®-PT range uses a ceramic fuse body, pure silver fuse elements and silver-plated copper terminals to deliver consistent current-limiting performance and long service life. The integrated 80 N thermal striker enables reliable operation with compatible medium voltage switchgear, helping isolate faulted circuits quickly and safely.
Rated at 24 kV AC with a 100 A current rating, the T1000149 features a 78 mm diameter and 442 mm overall length. It is ideally suited for transformer protection within utility substations, industrial facilities and medium voltage distribution networks.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 24 kV AC rated voltage.
- 100 A rated current.
- Controlled power dissipation reduces heat build-up within switchgear.
- 63 kA breaking capacity for dependable fault interruption.
- Integrated 80 N thermal striker for coordinated switchgear operation.
Key Features
- Mersen Limitor®-PT series.
- High voltage DIN back-up fuse.
- 24 kV AC IEC rated voltage.
- 100 A rated current.
- 78 mm diameter × 442 mm fuse size.
- 63 kA maximum AC breaking capacity.
- Controlled power dissipation technology.
- Integrated 80 N thermal striker.
- Ceramic body with pure silver fuse elements.
- Clip-mounted DIN construction.
High voltage back-up fuses rapidly interrupt damaging short-circuit currents before excessive thermal and mechanical forces can damage transformers, switchgear and associated electrical equipment. Their current-limiting characteristics help reduce equipment stress whilst improving installation reliability.
The Mersen T1000149 combines dependable fault interruption with controlled power dissipation technology, making it particularly suitable for enclosed medium voltage switchgear where minimising internal heating is important for long-term performance.
Typical Applications
- Medium voltage transformer protection.
- Distribution substations.
- Industrial power distribution systems.
- Medium voltage switchgear.
- Renewable energy installations.
- Utility electrical networks.
