Why Choose the Mersen NH4A2GTR315KVA Transformer Fuse-Link?
The Mersen NH4A2GTR315KVA is a specialist NH4a size gTr transformer fuse-link engineered to provide dependable protection for 315 kVA low-voltage transformers. Rated at 455 A and 400 V AC, it is specifically designed to protect transformer circuits while maintaining reliable operation during normal energisation and temporary overload conditions.
Its gTr operating characteristic is developed specifically for transformer protection, allowing the fuse-link to withstand magnetising inrush currents while providing reliable protection against sustained overloads and high prospective short-circuit currents. The characteristic also supports excellent selectivity when coordinated with downstream NH gG fuse-links.
Manufactured to DIN NH standards, the NH4A2GTR315KVA features a heavy-duty ceramic body, silver-plated copper blade contacts, live gripping lugs and a centre-mounted indicator for rapid identification of fuse operation. Its NH4a construction enables installation into compatible NH fuse bases and fuse-switch disconnectors used in industrial power distribution systems.
Key Advantages
- Purpose-designed for 315 kVA transformer protection.
- 455 A rated current for correctly coordinated transformer circuits.
- 400 V AC operating voltage for industrial power distribution.
- gTr characteristic withstands transformer energisation and temporary overloads.
- Excellent selectivity with downstream NH gG fuse-links.
- Centre indicator provides rapid fuse status identification.
- Live gripping lugs allow safe replacement using an approved NH fuse puller.
Key Features
- Mersen NH gTr transformer fuse-link series.
- NH4a fuse size.
- 315 kVA transformer rating.
- 455 A rated current.
- 400 V AC rated voltage.
- gTr transformer protection characteristic.
- Centre-mounted operation indicator.
- Live gripping lugs.
- Silver-plated copper blade contacts.
- High-strength ceramic body.
- 72.9 mm body width.
The Mersen NH4A2GTR315KVA is engineered specifically for low-voltage transformer protection. Its time-current characteristic follows the thermal behaviour of distribution transformers, allowing normal energisation and temporary overload conditions without nuisance operation while still providing dependable protection against damaging faults.
When correctly coordinated, gTr fuse-links provide excellent discrimination with downstream protective devices, helping isolate transformer faults whilst maintaining continuity of supply to unaffected circuits. Installation should always be completed by qualified electrical professionals using compatible NH4a equipment.
Typical Applications
- 315 kVA low-voltage distribution transformers.
- Industrial power distribution systems.
- Transformer secondary protection.
- Main switchboards.
- Commercial electrical distribution.
- NH fuse-switch disconnectors and transformer panels.
