Why Choose the Mersen X1000290 Limitor®-PTD High Voltage Back-up Fuse?
The Mersen X1000290 is a high performance Limitor®-PTD DIN high voltage back-up fuse-link designed to protect medium voltage transformers against the thermal and dynamic effects of short-circuit currents. Manufactured in accordance with IEC 60282-1 and VDE 0670 T402, it provides dependable fault interruption for high voltage switchgear and transformer protection systems.
As part of the advanced Mersen Limitor®-PTD range, the X1000290 incorporates controlled power dissipation and an integrated thermal striker. These features support reliable transformer protection while helping manage thermal conditions within compatible air insulated and gas insulated switchgear.
Rated at 36 kV AC with a 25 A current rating, the X1000290 has a 56 mm diameter × 537 mm fuse size and a maximum breaking capacity of 20 kA. Its pure silver fuse elements, silver-plated copper terminals and ceramic body provide consistent electrical performance and long service life.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- Controlled power dissipation supports operation within enclosed switchgear.
- 36 kV AC voltage rating for high voltage distribution systems.
- 25 A rated current for transformer primary protection.
- 20 kA breaking capacity for dependable fault interruption.
- Integrated 80 N thermal striker for compatible switchgear operation.
Key Features
- Mersen Limitor®-PTD back-up fuse-link.
- Catalogue number: 45DB360V25PTD.
- Rated voltage: 36 kV AC.
- Rated current: 25 A.
- Breaking capacity: 20 kA.
- Fuse size: 56 mm diameter × 537 mm length.
- 80 N thermal striker indication system.
- Clip-mounted DIN high voltage fuse construction.
High voltage back-up fuse-links interrupt significant short-circuit currents before transformers and associated switchgear are exposed to damaging thermal and mechanical stresses. This helps improve installation safety, reduce equipment damage and minimise costly electrical downtime.
The Mersen Limitor®-PTD range combines controlled power dissipation with an integrated thermal striker, making it suitable for modern air insulated and gas insulated switchgear. The X1000290 provides dependable transformer protection for new electrical installations and maintenance replacement projects.
Typical Applications
- Medium voltage transformer primary protection.
- Gas insulated switchgear.
- Air insulated switchgear.
- Industrial substations and distribution networks.
- Utility power distribution systems.
- Commercial and industrial electrical infrastructure.
