Why Choose the Mersen W1000289 Limitor®-PTD High Voltage Back-up Fuse?
The Mersen W1000289 is a premium Limitor®-PTD high voltage DIN back-up fuse-link with controlled power dissipation, engineered to provide dependable protection for medium voltage transformers operating in industrial and utility electrical networks. Manufactured in accordance with IEC 60282-1 and VDE 0670 T402, it delivers rapid interruption of fault currents while helping to minimise thermal stress within modern switchgear assemblies.
As part of the trusted Mersen Limitor®-PTD range, the W1000289 features pure silver fuse elements, silver-plated copper end caps and a robust ceramic body for excellent electrical performance and long service life. The integrated 80 N thermal striker enables reliable operation with compatible air insulated and gas insulated switchgear.
Rated for 36 kV AC with a 20 A current rating, this fuse is supplied in a 56 mm × 537 mm DIN format, making it ideal for protecting medium voltage transformers used in substations, renewable energy installations and industrial power distribution systems.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- Controlled power dissipation technology reduces thermal loading.
- 36 kV AC rated voltage for high voltage distribution systems.
- 20 A current rating suitable for transformer protection.
- Integrated 80 N thermal striker for dependable switchgear operation.
- Manufactured to IEC 60282-1 and VDE 0670 T402 standards.
Key Features
- Mersen Limitor®-PTD back-up fuse-link.
- Catalogue number: 45DB360V20PTD.
- Rated voltage: 36 kV AC.
- Rated current: 20 A.
- Breaking capacity: 31.5 kA.
- Fuse dimensions: 56 mm diameter × 537 mm length.
- 80 N thermal striker mechanism.
- Designed for transformer protection in air and gas insulated switchgear.
Medium voltage back-up fuse-links rapidly clear high fault currents before they can damage transformers or associated switchgear. This helps improve system reliability, extend equipment life and reduce maintenance costs across industrial electrical networks.
The Mersen Limitor®-PTD range combines controlled power dissipation with dependable fault interruption, making it an excellent solution for modern transformer installations used throughout utility, industrial and renewable energy applications.
Typical Applications
- Medium voltage transformer protection.
- Utility substations.
- Industrial power distribution.
- Gas insulated switchgear (GIS).
- Air insulated switchgear.
- Renewable energy installations.
