Mersen NH42GTR400KVA-8 DIN NH4a gTr transformer fuse-link rated at 577 A and 400 V AC for protection of 400 kVA low voltage transformers, featuring a top indicator and live gripping lugs.
£178.53
The Mersen NH42GTR400KVA-8 is a heavy-duty DIN NH gTr transformer fuse-link designed to provide dependable short-circuit protection for low voltage distribution transformers. Manufactured by Mersen, this NH4a size fuse-link is engineered to withstand transformer magnetising inrush currents while providing rapid interruption of damaging fault currents in demanding industrial and commercial power distribution systems.
Part of the proven Mersen NH gTr 400 V AC fuse-link series, the NH42GTR400KVA-8 incorporates live gripping lugs and a top-mounted indicator for quick visual inspection and safer maintenance. Its advanced current-limiting design helps minimise thermal and mechanical stress on transformers, switchgear and associated equipment during fault conditions.
Designed specifically for protecting 400 kVA transformers, the NH42GTR400KVA-8 has a 577 A rated current and is intended for operation on 400 V AC systems. Its specialised gTr characteristic makes it ideal for transformer circuits requiring dependable protection without nuisance operation during energisation.
The Mersen NH42GTR400KVA-8 has been specifically developed to protect low voltage transformers against short-circuit faults while tolerating the high magnetising inrush currents that occur during energisation. This specialised gTr characteristic helps prevent unnecessary fuse operation while maintaining dependable protection when genuine fault conditions arise.
Its current-limiting construction reduces the energy released during electrical faults, helping protect transformer windings, busbars, switchgear and distribution equipment. This contributes to improved system reliability, reduced maintenance requirements and longer transformer service life.
| Manufacturer | Mersen |
|---|---|
| Series | NH gTr 400 V AC Fuse-Links |
| Model | NH42GTR400KVA-8 |
| Manufacturer item number | T1030486 |
| Product type | DIN NH gTr transformer fuse-link |
| Transformer rating | 400 kVA |
| Rated current | 577 A |
| Rated voltage | 400 V AC |
| Fuse size | NH4a |
| Operating class | gTr |
| Current type | AC |
| Indicator | Top indicator |
| Gripping lugs | Live gripping lugs |
| Body width | Approx. 73 mm |
| Power dissipation | Approx. 39 W |
| Approximate weight | 2.2 kg |
| EAN | 3605340535105 |
| RoHS compliant | Yes |
It is a DIN NH4a gTr fuse-link specifically designed to protect 400 kVA low voltage transformers against damaging short-circuit currents.
The Mersen NH42GTR400KVA-8 has a rated current of 577 A.
The fuse-link is designed for transformer circuits operating on 400 V AC electrical systems.
gTr fuse-links are specifically designed for transformer protection, allowing normal transformer energisation currents while providing reliable short-circuit protection.
The top indicator provides a clear visual indication when the fuse-link has operated, helping maintenance personnel identify and replace the fuse quickly.
Mersen NH gTr fuse-links are trusted worldwide by electrical engineers, OEM manufacturers and panel builders for dependable transformer protection, excellent current limitation and reliable long-term performance in industrial power distribution systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...