Why Choose the Mersen R1000239 High Voltage Transformer Fuse?
The Mersen R1000239 is a dependable DIN high voltage back-up fuse-link designed to protect transformers and associated medium voltage equipment against the damaging effects of short-circuit currents. Part of the established Mersen Limitor®-PD series, it provides effective current limitation for high voltage switchgear, controlgear and electrical distribution systems.
The R1000239 is manufactured using high-quality materials selected for reliable electrical performance and long service life. Pure silver fuse elements provide consistent fault interruption, while silver-coated copper contact caps and a robust ceramic body support dependable operation in demanding industrial and utility installations.
With a rated voltage of 12 kV AC and a rated current of 6.3 A, the Mersen R1000239 is suitable for compatible medium voltage transformer circuits. Its DIN-format construction has a 56 mm diameter, a 292 mm length and an integrated 80 N striker for use with compatible switchgear tripping or indication mechanisms.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for high voltage electrical systems.
- 6.3 A rated current for compatible transformer circuits.
- Current-limiting operation helps reduce damaging short-circuit energy.
- Integrated 80 N striker for switchgear tripping or indication.
- DIN-format dimensions support installation in compatible fuse bases.
- Pure silver fuse elements provide reliable interruption performance.
- Complies with recognised IEC and VDE high voltage fuse standards.
Key Features
- Mersen Limitor®-PD back-up fuse series.
- Catalogue number: 45DB120V6,3PD.
- 12 kV AC rated voltage.
- 6.3 A rated current.
- 56 mm fuse diameter.
- 292 mm fuse length.
- Integrated 80 N striker mechanism.
- Pure silver fuse elements.
- Silver-coated copper contact caps.
- Durable ceramic insulating body.
- Back-up fuse construction without controlled power dissipation.
High voltage back-up fuse-links protect transformers by interrupting substantial short-circuit currents before excessive thermal and mechanical forces can damage transformer windings, switchgear or connected electrical equipment. Their current-limiting action helps reduce the peak current and total fault energy transferred into the protected circuit.
As a back-up fuse-link, the Mersen R1000239 is intended primarily for high-current fault protection and should be coordinated with appropriate overload protection. When the fuse operates, its integrated striker can actuate a compatible switchgear trip mechanism or provide an indication that the fuse-link requires replacement.
Typical Applications
- Medium voltage transformer protection.
- High voltage switchgear and controlgear.
- Industrial power distribution systems.
- Utility substations and distribution networks.
- Renewable energy installations.
- Manufacturing and processing facilities.
- Commercial infrastructure power systems.
- OEM medium voltage electrical assemblies.
