Why Choose the Mersen NH42GTR315KVA-8 Transformer Protection Fuse?
The Mersen NH42GTR315KVA-8 is a premium NH gTr low voltage fuse link specifically engineered to protect distribution transformers from overloads and short-circuit faults. As part of the trusted Mersen NH transformer fuse-link range, it features a transformer-specific operating characteristic that accommodates magnetising inrush currents while delivering dependable fault protection.
Designed for 315 kVA distribution transformers, this fuse link operates on 400 V AC systems and has a 455 A rated current. Its NH Size 4a construction incorporates a top-mounted operating indicator and live gripping lugs, enabling quick visual status checks and safer replacement using an approved NH fuse puller.
With its high breaking capacity, ceramic body and DIN NH construction, the NH42GTR315KVA-8 is ideal for transformer feeders, industrial switchgear, commercial electrical distribution systems and utility installations where reliable transformer protection is essential.
Key Advantages
- Purpose-designed gTr fuse link for transformer protection.
- Suitable for 315 kVA distribution transformers.
- 455 A rated current for high-capacity transformer circuits.
- 400 V AC rated operating voltage.
- Transformer-specific operating curve accommodates energisation inrush current.
- Top indicator allows rapid identification of an operated fuse.
Key Features
- Mersen NH gTr transformer fuse-link series.
- NH Size 4a.
- 455 A rated current.
- 400 V AC rated voltage.
- 315 kVA transformer nominal capacity.
- gTr operating characteristic.
- 100 kA AC breaking capacity.
- Top-mounted operating indicator.
- Live gripping lugs.
- Robust ceramic DIN NH construction.
The gTr operating characteristic is developed specifically for transformer applications, allowing the high magnetising current present during transformer energisation while providing reliable protection against overloads and high-energy short-circuit faults. This helps maximise transformer service life and maintain system reliability.
Designed for installation in compatible NH4a fuse bases, the NH42GTR315KVA-8 provides dependable protection for transformer feeders and electrical distribution systems. As with all NH fuse systems, installation and replacement should be carried out by qualified personnel using an approved NH fuse puller.
Typical Applications
- 315 kVA distribution transformer protection.
- Industrial electrical distribution systems.
- Commercial building power distribution.
- Transformer feeder circuits.
- Utility and infrastructure installations.
- Industrial switchboards and distribution panels.
