Why Choose the Mersen NH22GTR250KVA-1 Transformer Protection Fuse-Link?
The Mersen NH22GTR250KVA-1 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 provides a time-current characteristic adapted to transformer operating behaviour for dependable protection and improved service continuity.
This NH2 fuse-link combines current-limiting performance with a centre-mounted indicator and isolated gripping lugs. The indicator provides clear visual confirmation when the fuse has operated, while the insulated gripping points support safer handling and replacement by appropriately qualified electrical personnel.
Rated for the protection of 250 kVA transformers, the NH22GTR250KVA-1 has a nominal current rating of 361 A and an operating voltage rating of 400 V AC. Its transformer-specific gTr characteristic allows normal loading and temporary energisation conditions while precisely interrupting sustained overloads and electrical faults.
Key Advantages
- Purpose-designed gTr fuse-link for transformer protection.
- Suitable for protecting 250 kVA distribution transformers.
- 361 A rated current for high-capacity transformer circuits.
- 400 V AC rated operating voltage.
- Transformer-adapted characteristic helps reduce unnecessary interruptions.
- Isolated gripping lugs support safer handling and replacement.
Key Features
- Mersen NH gTr transformer protection series.
- Catalogue number: NH22GTR250KVA-1.
- 250 kVA transformer rating.
- 361 A rated current.
- 400 V AC IEC rated voltage.
- DIN NH Size 2 construction.
- gTr transformer protection characteristic.
- Centre-mounted operating indicator.
- Isolated gripping lugs.
- High current-limiting performance.
Reliable Protection for Distribution Transformers
The Mersen NH22GTR250KVA-1 uses a gTr operating characteristic specifically developed for transformer protection. This characteristic is matched to transformer loading behaviour, allowing 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 electrical faults, protecting transformers, conductors, switchgear and connected distribution equipment. The fuse-link also supports 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.
