Why Choose the Mersen NH3GTR75KVA Transformer Protection Fuse?
The Mersen NH3GTR75KVA is a high-performance NH transformer protection fuse-link engineered to protect low-voltage distribution transformers against overloads and short-circuit faults. Manufactured to the DIN NH standard, this gTr fuse-link provides a time-current characteristic specifically developed for transformer applications.
Part of Mersen's trusted NH gTr fuse range, the NH3GTR75KVA offers reliable discrimination with downstream gG fuse-links while allowing normal transformer energisation currents without nuisance operation. This helps maximise system reliability whilst protecting valuable transformers from damaging fault conditions.
With a transformer rating of 75 kVA, a rated current of 108 A and a 400 V AC operating voltage, the NH3GTR75KVA is ideal for industrial and commercial transformer installations. It features live gripping lugs, standard NH blade contacts and a centre-mounted operation indicator for easy maintenance and fault identification.
Key Advantages
- Purpose-designed gTr fuse-link for transformer protection.
- 75 kVA transformer rating for low-voltage distribution systems.
- 108 A rated current at 400 V AC.
- 100 kA AC breaking capacity for dependable fault interruption.
- Transformer-specific operating characteristic tolerates normal magnetising inrush currents.
- Centre-mounted indicator provides quick visual identification after operation.
Key Features
- Mersen NH gTr transformer fuse-link series.
- DIN NH3 fuse size.
- 75 kVA transformer protection.
- 108 A rated current.
- 400 V AC rated voltage.
- gTr utilisation category.
- Centre-mounted fuse operation indicator.
- Live gripping lugs.
- Standard NH blade contacts.
- 50 mm body width.
Transformer protection fuse-links must withstand temporary inrush currents whilst providing rapid disconnection during overloads and short circuits. The Mersen NH3GTR75KVA features a gTr operating characteristic specifically developed to protect transformers without unnecessary interruptions during energisation.
When coordinated with downstream gG fuse-links, the NH3GTR75KVA provides excellent selectivity, helping minimise downtime and ensuring faults are isolated at the appropriate point within the electrical distribution network.
Typical Applications
- Protection of 75 kVA low-voltage transformers.
- Industrial power distribution systems.
- Commercial electrical installations.
- Transformer feeder switchboards.
- NH fuse-switch disconnectors.
- Electrical distribution panels and substations.
