Why Choose the Mersen NH32GTR250KVA Transformer Fuse Link?
The Mersen NH32GTR250KVA is a specialised NH3 size gTr fuse link engineered to protect 250 kVA distribution transformers in low-voltage electrical systems. Rated at 361 A and 400 V AC, it is designed to provide dependable transformer protection while accommodating the high magnetising inrush currents that occur during transformer energisation.
Its gTr operating characteristic is specifically matched to transformer applications. Unlike general-purpose gG fuse links, the gTr characteristic tolerates temporary transformer inrush currents while delivering rapid protection against overloads and short-circuit faults, reducing nuisance fuse operation and improving system reliability.
The fuse incorporates a durable ceramic body, silver-plated blade contacts, live gripping tags and an integrated centre indicator for quick identification of an operated fuse. Its NH3 design with a 71 mm body width is suitable for compatible NH fuse bases, switch disconnectors and transformer protection assemblies.
Key Advantages
- Designed specifically for 250 kVA transformer protection.
- 361 A rated current matched to transformer applications.
- 400 V AC operating voltage.
- Special gTr transformer protection characteristic.
- High 100 kA breaking capacity.
- Centre indicator enables rapid identification of an operated fuse.
Key Features
- Mersen NH gTr transformer fuse series.
- NH3 fuse size.
- 361 A rated current.
- 400 V AC rated voltage.
- 250 kVA transformer rating.
- gTr transformer protection characteristic.
- Integrated centre fuse indicator.
- Live gripping tags for safe handling.
- Silver-plated copper blade contacts.
- Robust ceramic insulating body.
The Mersen NH32GTR250KVA is specifically developed to protect 250 kVA distribution transformers from damaging overloads and short-circuit faults while accommodating normal transformer energisation currents. Its dedicated gTr time/current characteristic improves coordination with transformer operating behaviour and helps minimise unnecessary fuse replacement.
The fuse should be installed in a compatible NH3 fuse base or switch disconnector and handled only by qualified electrical personnel using an approved NH fuse puller and suitable personal protective equipment.
Typical Applications
- 250 kVA distribution transformers.
- Industrial transformer protection.
- Electrical substations.
- Low-voltage transformer switchgear.
- Commercial power distribution systems.
- Utility and industrial electrical installations.
