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MERSEN FUSE NH4A400KVA GTR NH42GTR400KVA-8 NH42GTR400KVA-8
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.
£107.12
Why Choose the Mersen NH42GTR400KVA-8 Transformer Fuse-Link?
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.
Key Advantages
- Purpose-designed for low voltage transformer protection.
- 577 A rated current suitable for 400 kVA transformers.
- 400 V AC rated voltage for industrial power systems.
- gTr characteristic accommodates transformer energisation currents.
- Current-limiting design reduces equipment damage during electrical faults.
- Top indicator enables rapid identification of an operated fuse-link.
- Live gripping lugs simplify professional installation and replacement.
Key Features
- Mersen NH gTr transformer fuse-link series.
- 577 A rated current.
- 400 V AC rated operating voltage.
- Designed for 400 kVA transformers.
- DIN NH4a size construction.
- gTr transformer protection characteristic.
- Top-mounted fuse status indicator.
- Live gripping lugs.
- Ceramic industrial fuse construction.
- Approximate body width of 73 mm.
Reliable Protection for Distribution Transformers
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.
Typical Applications
- 400 kVA low voltage transformers.
- Industrial transformer protection.
- Commercial power distribution systems.
- Electrical switchboards.
- Transformer feeder circuits.
- OEM electrical distribution equipment.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Current | 577 A | |
| Voltage | 400 V | |
| 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 |
Frequently Asked Questions
What is the Mersen NH42GTR400KVA-8 used for?
It is a DIN NH4a gTr fuse-link specifically designed to protect 400 kVA low voltage transformers against damaging short-circuit currents.
What is the rated current of this fuse-link?
The Mersen NH42GTR400KVA-8 has a rated current of 577 A.
What voltage is this transformer fuse designed for?
The fuse-link is designed for transformer circuits operating on 400 V AC electrical systems.
What does the gTr operating class mean?
gTr fuse-links are specifically designed for transformer protection, allowing normal transformer energisation currents while providing reliable short-circuit protection.
What is the purpose of the top indicator?
The top indicator provides a clear visual indication when the fuse-link has operated, helping maintenance personnel identify and replace the fuse quickly.
Trusted for Transformer Protection
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.
