Why Choose the Mersen V1000127 High Voltage DIN Back-up Fuse?
The Mersen V1000127 is a high-performance Limitor®-PT high voltage DIN back-up fuse designed to provide dependable transformer protection in medium voltage electrical systems. Also identified by catalogue number 45DB120V32PT, this fuse features Controlled Power Dissipation (CPD) technology, helping to minimise fuse ageing while delivering reliable protection against short-circuit faults. It is manufactured in accordance with IEC 60282-1 for demanding utility and industrial applications.
The Limitor®-PT range is engineered using premium ceramic bodies, pure silver fuse elements and silver-plated copper end caps to ensure excellent electrical performance and long service life. The integrated 80 N thermal striker enables operation of compatible switchgear mechanisms or remote indication systems, improving both operational safety and maintenance efficiency.
With a 12 kV AC rated voltage, 31.5 A rated current and a standard 56 mm diameter × 292 mm length DIN format, the Mersen V1000127 is ideally suited to transformer protection in substations, switchgear and industrial power distribution networks.
Key Advantages
- Designed specifically for high voltage transformer protection.
- 12 kV AC IEC rated voltage.
- 31.5 A rated current.
- Controlled Power Dissipation (CPD) technology extends service life.
- Integrated 80 N thermal striker for indication and switch operation.
- High breaking capacity provides dependable fault interruption.
Key Features
- Mersen Limitor®-PT series.
- Catalogue number: 45DB120V32PT.
- 12 kV AC IEC voltage rating.
- 31.5 A rated current.
- Controlled Power Dissipation (CPD).
- 80 N thermal striker.
- DIN fuse size 56 mm × 292 mm.
- Manufactured to IEC 60282-1 standards.
The Limitor®-PT series combines fast short-circuit interruption with Controlled Power Dissipation technology, helping to reduce long-term thermal ageing of transformer protection fuses while maintaining reliable operation throughout their service life.
Its integrated thermal striker allows compatible switchgear mechanisms or indication devices to operate automatically following fuse operation, supporting improved safety and faster maintenance response.
Typical Applications
- Distribution transformer protection.
- Medium voltage substations.
- High voltage switchgear.
- Industrial electrical distribution systems.
- Utility power networks.
- Ring main units and transformer feeders.
