Why Choose the Mersen R1000285 High Voltage Transformer Fuse?
The Mersen R1000285 is a premium DIN high voltage back-up fuse-link developed to protect transformers and medium voltage equipment against damaging short-circuit currents. As part of the proven Mersen Limitor®-PTD series, it combines controlled power dissipation with a thermal striker, making it particularly suitable for modern gas-insulated and air-insulated switchgear installations.
Designed to IEC and VDE standards, the R1000285 delivers reliable current limitation while protecting valuable transformers from the thermal and dynamic effects of electrical faults. Manufactured using pure silver fuse elements, silver-coated copper end caps and a durable ceramic body, it offers dependable long-term performance in demanding industrial and utility environments.
With a rated voltage of 24 kV AC and a rated current of 100 A, the Mersen R1000285 is ideal for medium voltage transformer protection. Its 88 mm diameter, 442 mm body length and integrated 80 N thermal striker provide straightforward integration into compatible DIN switchgear assemblies.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 24 kV AC rated voltage for industrial and utility networks.
- 100 A rated current.
- Controlled power dissipation improves switchgear compatibility.
- Integrated 80 N thermal striker for tripping and indication.
- High current-limiting performance reduces fault energy.
- Pure silver fuse elements for dependable interruption.
- Recommended for compatible Siemens and Ormazabal switchgear.
Key Features
- Mersen Limitor®-PTD back-up fuse series.
- Catalogue number: 45DB240V100PTD.
- 24 kV AC rated voltage.
- 100 A rated current.
- 88 mm fuse diameter.
- 442 mm fuse length.
- Integrated 80 N thermal striker.
- Controlled power dissipation (CPD).
- Pure silver fuse elements.
- Silver-coated copper contact caps.
- High-strength ceramic body.
The Mersen R1000285 rapidly interrupts high prospective short-circuit currents before damaging thermal or mechanical stresses can affect transformers or associated switchgear. Its current-limiting design helps reduce fault energy while maintaining dependable protection of valuable electrical assets.
The controlled power dissipation design makes the fuse especially suitable for modern compact switchgear installations. The integrated thermal striker provides dependable operation of compatible trip mechanisms and visual fault indication when the fuse has operated.
Typical Applications
- Medium voltage transformer protection.
- Gas-insulated switchgear (GIS).
- Air-insulated switchgear.
- Industrial power distribution.
- Utility substations.
- Renewable energy installations.
- Manufacturing plants.
- OEM medium voltage equipment.
