Why Choose the Mersen NH3GTR250KVA-8 Transformer Protection Fuse-Link?
The Mersen NH3GTR250KVA-8 is a high-performance DIN NH gTr fuse-link specifically designed to protect low voltage distribution transformers against overloads and short-circuit faults. As part of the established Mersen NH gTr 400 V AC fuse-link range, it features a time-current characteristic adapted to transformer operating behaviour for reliable protection and improved installation continuity.
This NH3 fuse-link combines high current-limiting performance with a top-mounted indicator and live gripping lugs. The indicator allows qualified personnel to identify an operated fuse quickly, while the standard NH blade-contact design supports installation in compatible NH fuse bases and switch-fuse equipment.
Rated for the protection of 250 kVA transformers, the NH3GTR250KVA-8 has a nominal current of 361 A and an operating voltage rating of 400 V AC. Its gTr characteristic is designed to withstand normal transformer operating conditions while providing precise interruption during sustained overloads and electrical faults.
Key Advantages
- Purpose-designed gTr fuse-link for transformer protection.
- Suitable for protecting 250 kVA transformers.
- 361 A rated current for high-capacity distribution systems.
- 400 V AC rated operating voltage.
- Transformer-adapted time-current characteristic helps prevent unnecessary interruptions.
- Top-mounted indicator provides clear fuse operation status.
Key Features
- Mersen NH gTr transformer protection series.
- Catalogue number: NH3GTR250KVA-8.
- 250 kVA transformer rating.
- 361 A rated current.
- 400 V AC IEC rated voltage.
- DIN NH Size 3 construction.
- gTr full-range transformer protection characteristic.
- Top-mounted fuse operation indicator.
- Live gripping lugs.
- High current-limiting performance.
Reliable Protection for Distribution Transformers
The Mersen NH3GTR250KVA-8 uses a gTr operating characteristic developed specifically for transformer protection. This characteristic accommodates normal transformer loading and temporary operating conditions while providing precise interruption during sustained overloads and short-circuit faults.
Its current-limiting performance helps reduce the thermal and mechanical energy released during a fault, protecting transformers, switchgear, conductors and connected distribution equipment. The fuse-link also provides effective selectivity with suitably coordinated gG fuse-links elsewhere in the installation.
Typical Applications
- 250 kVA low voltage distribution transformers.
- Industrial transformer feeder circuits.
- Commercial and industrial substations.
- Low voltage switchboards.
- Power distribution panels.
- Transformer protection assemblies and fuse-switch equipment.
