Why Choose the Mersen Q1000284 High Voltage Transformer Protection Fuse?
The Mersen Q1000284 is a dependable high voltage DIN back-up fuse-link designed to protect transformers and associated medium voltage equipment against the thermal and dynamic effects of short-circuit currents. As part of the established Mersen Limitor®-PTD series, it combines reliable current-limiting protection with controlled power dissipation for use in high voltage switchgear, controlgear and electrical distribution systems.
This fuse-link is manufactured using pure silver fuse elements, silver-coated copper caps and a robust ceramic body. These carefully selected materials provide consistent electrical characteristics, effective fault interruption and dependable long-term performance within demanding industrial, commercial and utility installations.
With a rated voltage of 24 kV AC, a rated current of 80 A and a 65 mm diameter × 442 mm fuse body, the Q1000284 is suitable for transformer protection systems using compatible air-insulated or gas-insulated switchgear. Its controlled power dissipation design and integrated 80 N thermal striker support coordinated fault isolation and dependable switchgear operation.
Key Advantages
- Designed specifically for high voltage transformer protection.
- 24 kV AC rated voltage for medium voltage distribution systems.
- 80 A current rating for compatible transformer circuits.
- Controlled power dissipation helps manage thermal loading within switchgear.
- Integrated 80 N thermal striker for fault indication and switchgear operation.
- Current-limiting operation helps reduce damaging fault energy.
- Suitable for compatible air-insulated and gas-insulated switchgear.
- Pure silver fuse elements provide consistent electrical performance.
Key Features
- Mersen Limitor®-PTD high voltage DIN back-up fuse-link.
- Catalogue number: 45DB240V80PTD.
- Rated voltage: 24 kV AC.
- Rated current: 80 A.
- Fuse body diameter: 65 mm.
- Fuse body length: 442 mm.
- Integrated 80 N thermal striker mechanism.
- Controlled power dissipation construction.
- VDE T402 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 Q1000284 combines controlled power dissipation with an integrated thermal striker, making it suitable for coordinated operation with modern high voltage switchgear. The striker can respond to fuse operation or excessive thermal loading, helping activate compatible switching equipment and isolate the affected circuit.
Typical Applications
- Medium voltage transformer protection.
- Air-insulated switchgear.
- Gas-insulated switchgear.
- Transformer substations.
- Ring main units.
- Industrial power distribution systems.
- Utility distribution equipment.
- OEM transformer controlgear.
