Why Choose the Mersen M1000281 High Voltage Transformer Fuse?
The Mersen M1000281 is a premium Limitor®-PTD DIN high voltage back-up fuse-link developed to provide dependable short-circuit protection for medium voltage transformers. Designed in accordance with IEC 60282-1 and VDE 0670 T402, it incorporates Controlled Power Dissipation (CPD) technology, making it ideal for use in modern air-insulated and gas-insulated switchgear.
Manufactured using pure silver fuse elements, silver-coated copper end caps and a durable ceramic body, the M1000281 delivers excellent electrical performance and long service life. The integrated 80 N thermal striker enables reliable operation with compatible switchgear, whilst the CPD design helps reduce operating temperatures inside enclosed equipment.
With a rated voltage of 24 kV AC, a rated current of 40 A and dimensions of 56 mm diameter × 442 mm length, the M1000281 is ideally suited to protecting distribution transformers from damaging short-circuit currents whilst maintaining reliable medium voltage network operation.
Key Advantages
- High voltage DIN back-up fuse-link for transformer protection.
- 24 kV AC rated voltage.
- 40 A rated current.
- Controlled Power Dissipation (CPD) technology reduces thermal loading.
- 63 kA maximum breaking capacity.
- Integrated 80 N thermal striker.
- Designed for air-insulated and gas-insulated switchgear.
- Manufactured in accordance with IEC 60282-1 and VDE 0670 T402.
Key Features
- Mersen Limitor®-PTD back-up fuse series.
- Catalogue number: 45DB240V40PTD.
- 24 kV AC rated voltage.
- 40 A current rating.
- 56 mm diameter × 442 mm length.
- 63 kA maximum AC breaking capacity.
- 14.2 kA²s total clearing I²t.
- 161 A minimum breaking current.
- 80 N thermal striker.
- Controlled Power Dissipation (CPD) construction.
The Mersen M1000281 is engineered to interrupt high prospective short-circuit currents before they can damage transformers and associated medium voltage equipment. Its current-limiting characteristics help minimise thermal and mechanical stress, improving system reliability whilst reducing maintenance requirements.
Controlled Power Dissipation technology helps reduce heat generation within enclosed switchgear whilst maintaining dependable fault interruption performance. The M1000281 is recommended for use in modern transformer protection schemes and is approved for use with many leading switchgear manufacturers.
Typical Applications
- Medium voltage transformer protection.
- Air-insulated switchgear.
- Gas-insulated switchgear.
- Utility substations.
- Industrial power distribution systems.
- Renewable energy installations.
- OEM medium voltage equipment.
