Why Choose the Mersen R1018317 High Voltage Transformer Fuse?
The Mersen R1018317 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 advanced Mersen Limitor®-PTS series, it combines low power dissipation with an integrated thermal striker, making it particularly suitable for modern air-insulated and gas-insulated switchgear installations.
The innovative Limitor®-PTS range features an optimised fuse-element design that significantly reduces power losses while introducing a thermal striker to help prevent overheating within the fuse compartment. Manufactured using pure silver fuse elements, silver-coated copper contact caps and a high-strength ceramic body, the R1018317 delivers reliable protection and long service life in demanding industrial and utility environments.
Rated at 12 kV AC and 100 A, the Mersen R1018317 is designed for transformer protection in medium voltage distribution systems. Its 78 mm diameter, 442 mm length and integrated 80 N thermal striker allow straightforward installation into compatible DIN fuse bases and switchgear. Siemens and Ormazabal recommend the Limitor®-PTS range for compatible gas-insulated switchgear.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for industrial and utility power systems.
- 100 A rated current.
- Low power dissipation helps reduce fuse compartment heating.
- Integrated 80 N thermal striker for switchgear tripping and indication.
- High current-limiting performance minimises fault energy.
- Pure silver fuse elements for dependable interruption.
- Recommended for compatible Siemens and Ormazabal switchgear.
Key Features
- Mersen Limitor®-PTS back-up fuse series.
- Catalogue number: 45DB120V100PTS3.
- 12 kV AC rated voltage.
- 100 A rated current.
- 78 mm fuse diameter.
- 442 mm fuse length.
- Integrated 80 N thermal striker.
- Low power dissipation fuse design.
- Pure silver fuse elements.
- Silver-coated copper contact caps.
- High-strength ceramic body.
The Mersen R1018317 rapidly interrupts high prospective short-circuit currents before excessive thermal or mechanical stress can damage transformers, switchgear or associated electrical equipment. Its current-limiting characteristics minimise fault energy while the low power dissipation design helps improve switchgear reliability.
The integrated thermal striker provides dependable operation of compatible trip mechanisms while helping prevent overheating inside sealed switchgear compartments. This makes the Limitor®-PTS range particularly suitable for compact modern medium voltage installations.
Typical Applications
- Medium voltage transformer protection.
- Gas-insulated switchgear (GIS).
- Air-insulated switchgear.
- Industrial power distribution.
- Utility substations.
- Renewable energy installations.
- Manufacturing facilities.
- OEM medium voltage equipment.
