Why Choose the Mersen Q1000123 High Voltage Transformer Protection Fuse?
The Mersen Q1000123 is a dependable high voltage DIN back-up fuse-link designed to protect transformers and associated medium voltage equipment against damaging short-circuit currents. As part of the established Mersen Limitor®-PT series, it provides reliable current-limiting protection for high voltage switchgear, controlgear and electrical distribution systems.
This fuse-link is manufactured using pure silver fuse elements, silver-coated copper caps and a durable ceramic body. These carefully selected materials provide consistent electrical characteristics, effective fault interruption and dependable long-term performance in demanding industrial, commercial and utility installations.
With a rated voltage of 12 kV AC, a rated current of 10 A and a 56 mm diameter × 292 mm fuse body, the Q1000123 is suitable for transformer protection systems requiring a DIN-format fuse-link. Its controlled power dissipation design and integrated 80 N striker support reliable operation and coordinated fault isolation within compatible medium voltage switchgear.
Key Advantages
- Designed specifically for high voltage transformer protection.
- 12 kV AC rated voltage for medium voltage systems.
- 10 A current rating for compatible transformer circuits.
- Controlled power dissipation helps manage thermal loading within switchgear.
- Integrated 80 N striker for fault indication and switchgear operation.
- Current-limiting operation helps reduce damaging fault energy.
- Pure silver fuse elements provide consistent electrical performance.
- Robust ceramic construction supports dependable service life.
Key Features
- Mersen Limitor®-PT high voltage DIN back-up fuse-link.
- Catalogue number: 45DB120V10PT.
- Rated voltage: 12 kV AC.
- Rated current: 10 A.
- Fuse body diameter: 56 mm.
- Fuse body length: 292 mm.
- Integrated 80 N striker mechanism.
- Controlled power dissipation construction.
- VDE T4 DIN-format transformer fuse design.
- Back-up fuse classification in accordance with IEC 60282-1.
High voltage back-up fuse-links protect transformers by rapidly limiting and interrupting severe short-circuit currents before excessive thermal or mechanical stress can damage transformer windings, switchgear or connected distribution equipment. Their current-limiting action also helps reduce the peak current and energy passed into a fault.
The Mersen Q1000123 combines dependable transformer protection with controlled power dissipation to help manage heat within enclosed switchgear. Its integrated striker can provide fault indication or operate compatible switching equipment, supporting coordinated circuit isolation following fuse operation.
Typical Applications
- Medium voltage transformer protection.
- High voltage switchgear assemblies.
- Transformer substations.
- Ring main units.
- Industrial power distribution systems.
- Utility distribution equipment.
- Renewable energy installations.
- OEM transformer controlgear.
