Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE NH4AC 315KVA 400V GTR MI NH4AGTR315KVA
Mersen NH4AGTR315KVA DIN NH4a gTr fuse-link for 315 kVA transformer protection, rated 455 A and 400 V AC.
£105.67
Why Choose the Mersen NH4AGTR315KVA Transformer Protection Fuse?
The Mersen NH4AGTR315KVA is a high-performance DIN NH gTr fuse-link specifically engineered to protect low voltage distribution transformers against overloads and short circuits. As part of the trusted Mersen NH gTr transformer protection range, it delivers coordinated protection that closely matches transformer characteristics, helping maximise reliability and minimise unnecessary fuse operation.
Manufactured to IEC and DIN NH standards, this NH4a size fuse-link features live gripping lugs and a centre-mounted operation indicator for rapid visual inspection and straightforward replacement by qualified personnel. Its robust ceramic construction and high interrupting capacity make it suitable for demanding industrial and utility installations.
Designed for the protection of 315 kVA distribution transformers, the NH4AGTR315KVA has a 455 A rated current and a 400 V AC operating voltage, making it an ideal solution for transformer feeders in commercial and industrial electrical distribution systems.
Key Advantages
- Purpose-designed gTr characteristic for transformer protection.
- Suitable for protecting 315 kVA distribution transformers.
- 455 A rated current for high-power applications.
- 400 V AC rated voltage.
- High breaking capacity for dependable fault interruption.
- Centre-mounted indicator provides fast visual fuse status confirmation.
Key Features
- Mersen NH gTr transformer fuse-link series.
- Catalogue number: NH4AGTR315KVA.
- Transformer rating: 315 kVA.
- 455 A rated current.
- 400 V AC IEC rated voltage.
- DIN NH Size NH4a.
- gTr utilisation category.
- Centre-mounted operation indicator.
- Live gripping lugs.
- Body width approximately 72.9 mm.
- RoHS compliant.
Reliable Protection for Distribution Transformers
The Mersen NH4AGTR315KVA is specifically engineered for transformer protection applications. Its gTr time-current characteristic is optimised to coordinate with transformer operating characteristics, providing dependable fault protection while reducing the likelihood of nuisance fuse operation during transformer energisation.
Its robust NH construction, high fault interruption capability and compliance with recognised international standards make it an excellent choice for transformer substations, industrial power distribution systems and utility infrastructure.
Typical Applications
- Low voltage distribution transformers.
- Industrial substations.
- Commercial electrical distribution systems.
- Utility transformer protection.
- OEM switchgear assemblies.
- Power distribution infrastructure.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Visual indicator | |
|---|---|---|
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Current | 455 A | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links gTr 400 VAC | |
| Model | NH4AGTR315KVA | |
| Item number | C1028723 | |
| Product type | DIN NH transformer fuse-link | |
| Fuse characteristic | gTr | |
| Fuse size | NH4a | |
| Transformer rating | 315 kVA | |
| Rated current | 455 A | |
| Rated voltage | 400 V AC | |
| Indicator | Centre indicator | |
| Gripping lugs | Live gripping lugs | |
| Body width | 72.9 mm | |
| Power dissipation | 32 W | |
| Weight | Approx. 2.2 kg | |
| Compliance | IEC / DIN NH, RoHS | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AGTR315KVA used for?
It is designed specifically to protect 315 kVA low voltage distribution transformers against overloads and short-circuit faults.
What does the gTr fuse characteristic mean?
The gTr characteristic is specifically developed for transformer protection, providing time-current performance matched to transformer operating characteristics.
What is the rated current of this fuse?
The NH4AGTR315KVA has a rated current of 455 A.
What transformer size is this fuse intended for?
This model is designed for the protection of 315 kVA distribution transformers.
Does this fuse include an operation indicator?
Yes. It incorporates a centre-mounted indicator that allows quick visual confirmation when the fuse has operated.
Trusted by Power Distribution Professionals Worldwide
Mersen NH transformer fuse-links are widely specified by utilities, panel builders and electrical engineers for dependable transformer protection, high reliability and long service life in demanding power distribution applications.
