Why Choose the Mersen A1018325 High-Voltage Transformer Fuse?
The Mersen A1018325, catalogue number 45DB240V100PTS, is a premium DIN high-voltage back-up fuse engineered for transformer protection in medium-voltage electrical systems. As part of the advanced Mersen Limitor®-PTS series, it features low power dissipation and an integrated thermal striker, making it particularly suitable for modern air-insulated and gas-insulated switchgear installations.
Developed using pure silver fuse elements, silver-plated copper end caps and a robust ceramic body, the A1018325 delivers dependable protection against the thermal and dynamic effects of short circuits. The innovative thermal striker helps prevent overheating within the fuse compartment, improving system safety and extending equipment life.
With a rated voltage of 24 kV AC, a rated current of 100 A and a 65 kA breaking capacity, this fuse is ideally suited for protecting distribution transformers used in industrial facilities, utilities and compact substations. Siemens and Ormazabal recommend the Limitor®-PTS range for compatible gas-insulated switchgear.
Key Advantages
- Designed specifically for medium-voltage transformer protection.
- 24 kV AC IEC rated voltage.
- 100 A rated current.
- 65 kA breaking capacity.
- Very low power losses improve operating efficiency.
- Integrated 80 N thermal striker helps prevent overheating.
- Suitable for air-insulated and gas-insulated switchgear.
- High-quality ceramic construction with pure silver fuse elements.
Key Features
- Mersen Limitor®-PTS transformer back-up fuse.
- Manufacturer part number: A1018325.
- Catalogue number: 45DB240V100PTS.
- Rated voltage: 24 kV AC.
- Rated current: 100 A.
- Maximum breaking capacity: 65 kA.
- Minimum interrupting current: 350 A.
- Fuse dimensions: 88 × 442 mm.
- Thermal striker: 80 N.
- Clip-mounted cylindrical terminals.
The Mersen A1018325 rapidly interrupts high short-circuit currents before they can damage distribution transformers or associated switchgear. Its current-limiting design reduces both peak fault current and fault energy, helping protect transformer windings, conductors and electrical equipment.
Its patented thermal striker technology provides an additional layer of protection by responding to overheating within the fuse compartment. This makes the Limitor®-PTS range particularly suitable for compact switchgear installations where thermal management is critical.
Typical Applications
- Medium-voltage distribution transformers.
- Gas-insulated switchgear (GIS).
- Air-insulated switchgear.
- Compact transformer substations.
- Industrial electrical distribution.
- Utility power networks.
- High-voltage commercial installations.
