Why Choose the Mersen Q1005551 High Voltage Transformer Protection Fuse?
The Mersen Q1005551 is a high performance DIN high voltage back-up fuse-link engineered to provide dependable protection for transformers and medium voltage distribution equipment. Part of the trusted Mersen Limitor®-PTD series, it delivers reliable current-limiting performance with controlled power dissipation for demanding industrial and utility applications.
Designed using premium ceramic construction, pure silver fuse elements and silver-coated copper contacts, the fuse-link offers excellent electrical performance, long service life and dependable fault interruption. Its integrated thermal striker enables coordinated operation with compatible switchgear and transformer protection systems.
With a 24 kV AC rated voltage, 125 A rated current and a robust DIN format, the Q1005551 is ideal for protecting medium voltage transformers installed within substations, switchgear assemblies and industrial power distribution networks.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 24 kV AC rated voltage for industrial power distribution.
- 125 A rated current for demanding transformer applications.
- Current-limiting technology reduces fault energy.
- Integrated 80 N thermal striker for switchgear operation.
- Controlled power dissipation improves thermal performance.
- Suitable for air-insulated and gas-insulated switchgear.
- Manufactured to recognised IEC and VDE standards.
Key Features
- Mersen Limitor®-PTD series.
- DIN high voltage back-up fuse-link.
- 24 kV AC rated voltage.
- 125 A rated current.
- Ceramic fuse body.
- Pure silver fuse elements.
- Silver-coated copper contacts.
- Integrated thermal striker mechanism.
- Controlled power dissipation design.
- Current-limiting fault interruption.
High voltage transformer fuse-links rapidly interrupt short-circuit currents before damaging thermal or mechanical stresses develop within transformers and associated switchgear. Their current-limiting characteristics help improve network protection while reducing equipment damage during severe electrical faults.
The Limitor®-PTD range is designed for dependable transformer protection and coordinated operation with modern medium voltage switchgear installed throughout industrial facilities, renewable energy installations and electrical distribution networks.
Typical Applications
- Medium voltage transformers.
- Electrical substations.
- Industrial switchgear.
- Ring main units.
- Utility distribution networks.
- Renewable energy installations.
- Power distribution panels.
- OEM electrical equipment.
