Why Choose the Mersen A1000132 High-Voltage Transformer Fuse?
The Mersen A1000132, catalogue number 45DB120V100PT, is a high-performance DIN high-voltage back-up fuse designed to protect transformers against damaging short-circuit currents. Part of the Mersen Limitor®-PT series, it combines dependable current limitation with controlled power dissipation for use in modern high-voltage switchgear and controlgear.
Rated at 12 kV AC and 100 A, the A1000132 rapidly interrupts severe fault currents while limiting the peak current and energy passed into the protected system. This helps reduce thermal and mechanical stress on transformer windings, cables, contacts and associated switchgear components.
The fuse features pure silver fuse elements, silver-plated copper terminals and a robust ceramic body. Its integrated 80 N CPD striker provides controlled power dissipation and can actuate compatible switchgear mechanisms when the fuse operates. With a nominal fuse size of 78 × 292 mm, it is designed for secure clip mounting in compatible DIN high-voltage fusegear.
Key Advantages
- Designed specifically for high-voltage transformer protection.
- 12 kV AC rated voltage for medium-voltage distribution systems.
- 100 A rated current.
- High 63 kA breaking capacity.
- Strong current limitation reduces peak short-circuit stress.
- Integrated 80 N CPD striker for controlled power dissipation.
- Low switching voltage supports effective equipment protection.
- Suitable for indoor and outdoor high-voltage applications.
Key Features
- Mersen Limitor®-PT transformer back-up fuse.
- Manufacturer part number: A1000132.
- Catalogue number: 45DB120V100PT.
- Rated voltage: 12 kV AC.
- Rated current: 100 A.
- Maximum breaking capacity: 63 kA.
- Minimum interrupting current: 500 A.
- Fuse size: 78 × 292 mm.
- Striker force: 80 N.
- Clip-mounted cylindrical terminal configuration.
The Mersen A1000132 is designed to interrupt high short-circuit currents before they can cause extensive damage to a transformer or its associated electrical equipment. Its current-limiting action restricts both the peak fault current and the total energy allowed to pass through the circuit.
As a back-up fuse, the A1000132 is intended to clear high-value fault currents and must be coordinated with suitable switching or protective equipment for lower overcurrent conditions. Correct selection should consider transformer power, system voltage, inrush current, ambient conditions and switchgear requirements.
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.
