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MERSEN FUSE NH4A 315KVA 400V GTR NH42GTR315KVA-8
Mersen NH42GTR315KVA-8 NH Size 4a gTr transformer protection fuse link rated at 455 A and 400 V AC for 315 kVA distribution transformers.
£107.12
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.
Reliable Protection for Distribution Transformers
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.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 455 A | |
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Manufacturer | Mersen | |
| Item number | S1030485 | |
| Series | NH Fuse Links gTr 400 VAC | |
| Model | NH42GTR315KVA-8 | |
| Product type | NH transformer protection fuse link | |
| Fuse size | NH4a | |
| Rated current | 455 A | |
| Transformer nominal capacity | 315 kVA | |
| Rated operating voltage | 400 V AC | |
| Current type | AC | |
| Operating characteristic | gTr | |
| Rated AC breaking capacity | 100 kA | |
| Indicator | Top indicator | |
| Gripping lugs | Live gripping lugs | |
| Body width | Approx. 73 mm | |
| Weight | Approx. 2.2 kg | |
| Standards | DIN NH / IEC | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen NH42GTR315KVA-8 used for?
This fuse link is specifically designed to protect 315 kVA low voltage distribution transformers against overloads and short-circuit faults.
What transformer capacity is this fuse designed for?
The NH42GTR315KVA-8 is designed for transformers with a nominal capacity of 315 kVA.
What is the rated current?
The fuse has a rated current of 455 A.
What does the gTr characteristic mean?
The gTr operating characteristic is specifically designed for transformer protection, allowing transformer energisation inrush current while providing dependable overload and short-circuit protection.
Why is a top indicator included?
The top indicator provides a clear visual indication when the fuse has operated, helping maintenance engineers quickly identify and replace the fuse link.
Trusted Transformer Protection
Mersen NH gTr transformer fuse links are trusted worldwide by electrical engineers, transformer manufacturers and panel builders for dependable protection of low voltage transformer installations and reliable coordination with distribution systems.
