Why Choose the Mersen A1000569 High-Voltage Transformer Fuse?
The Mersen A1000569, catalogue number 45DB175V32P, is a dependable DIN high-voltage back-up fuse designed to protect transformers against damaging short-circuit currents. Part of the established Mersen Limitor®-P series, it is intended for use in high-voltage switchgear, controlgear and electrical distribution systems.
Rated at 17.5 kV AC and 31.5 A, the A1000569 provides high current limitation and rapid fault interruption. By restricting the peak current and clearing energy during a short circuit, it helps reduce thermal and mechanical stress on transformer windings, conductors and associated switchgear.
The fuse is manufactured using pure silver fuse elements, silver-plated copper terminals and a durable ceramic body. Its 56 × 367 mm DIN fuse format is designed for clip mounting, while the integrated 80 N striker provides fuse-operation indication and can actuate compatible switchgear mechanisms.
Key Advantages
- Designed specifically for high-voltage transformer protection.
- 17.5 kV AC rated voltage for medium-voltage systems.
- 31.5 A rated current.
- High 63 kA breaking capacity.
- Current-limiting operation reduces damaging fault energy.
- Integrated 80 N striker for indication and mechanical actuation.
- Robust ceramic construction for demanding installations.
- Suitable for indoor and outdoor high-voltage equipment.
Key Features
- Mersen Limitor®-P transformer back-up fuse.
- Manufacturer part number: A1000569.
- Catalogue number: 45DB175V32P.
- Rated voltage: 17.5 kV AC.
- Rated current: 31.5 A.
- Maximum breaking capacity: 63 kA.
- Minimum interrupting current: 105 A.
- Fuse size: 56 × 367 mm.
- Design: VDE T4.
- Indication system: Standard 80 N striker.
The Mersen A1000569 protects transformers by interrupting high short-circuit currents before they can cause extensive damage. Its current-limiting action restricts both the peak fault current and the total energy passed into the protected system, helping safeguard transformer windings, cables and switchgear components.
As a back-up fuse, the A1000569 is intended primarily to clear high-value fault currents. It must be coordinated with suitable switching or protective equipment to provide complete protection across the required current range.
Typical Applications
- Medium-voltage distribution transformer protection.
- High-voltage switchgear and controlgear.
- Transformer substations.
- Industrial electrical distribution systems.
- Utility and infrastructure installations.
- Indoor and outdoor high-voltage equipment.
- Fuse-switch combinations for transformer circuits.
