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MERSEN FUSE NH4AC 315KVA 400V GTR TI NH4AGTR315KVA-8

MERSEN FUSE NH4AC 315KVA 400V GTR TI NH4AGTR315KVA-8

Mersen NH4AGTR315KVA-8 DIN NH size 4a gTr transformer protection fuse-link rated at 455 A and 400 V AC for 315 kVA transformers.

SKU: NH4AGTR315KVA-8Alt SKU: NH4AGTR315KVA-8MPN: K1028730
Price
List Price £165.81 ex VAT
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Why Choose the Mersen NH4AGTR315KVA-8 Transformer Fuse-Link?

The Mersen NH4AGTR315KVA-8 is a premium DIN NH size 4a gTr transformer protection fuse-link engineered specifically for protecting 315 kVA low voltage transformers. Rated at 400 V AC with a 455 A current rating, it is designed for transformer protection in industrial power distribution systems, substations, OEM equipment and commercial electrical installations.

Its specialised gTr operating characteristic is optimised for transformer applications, allowing transformer magnetising inrush currents while providing rapid interruption of genuine fault currents. This improves selectivity and coordination compared with standard gG fuse-links, helping maximise transformer protection and system reliability.

The NH4AGTR315KVA-8 features a durable ceramic body, top-mounted operating indicator, live gripping lugs and silver-plated copper blade contacts. Designed for installation in compatible NH size 4a fuse bases and fuse-switch disconnectors, it provides dependable long-term protection for demanding transformer applications.

Key Advantages

  • Designed specifically for 315 kVA transformer protection.
  • gTr characteristic optimised for transformer applications.
  • 400 V AC rated operation.
  • 455 A rated current.
  • Current-limiting construction reduces damaging fault energy.
  • Top-mounted indicator for rapid fuse identification.
  • Live gripping lugs for safe handling with approved NH fuse pullers.

Key Features

  • Mersen DIN NH gTr transformer fuse-link.
  • Catalogue number: NH4AGTR315KVA-8.
  • Manufacturer item number: K1028730.
  • Fuse size: NH4a.
  • Transformer capacity: 315 kVA.
  • Rated current: 455 A.
  • Rated voltage: 400 V AC.
  • Utilisation category: gTr.
  • Top indication system.
  • Live gripping lugs.

Reliable Transformer Protection

Transformer protection requires fuse-links capable of withstanding magnetising inrush currents without nuisance operation while rapidly disconnecting damaging fault currents. The Mersen NH4AGTR315KVA-8 is engineered specifically for this duty, providing reliable protection and excellent coordination with low voltage distribution transformers.

Its dedicated gTr characteristic provides improved discrimination with upstream and downstream protective devices, helping maintain system continuity while protecting valuable transformer assets against electrical faults.

Typical Applications

  • 315 kVA distribution transformers.
  • Industrial transformer panels.
  • Low voltage substations.
  • Power distribution switchboards.
  • OEM transformer assemblies.
  • NH4a fuse bases and fuse-switch disconnectors.

Technical Specifications

Voltage 400 V
Manufacturer Mersen
Series NH gTr Transformer Fuse-Links
Model NH4AGTR315KVA-8
Manufacturer item number K1028730
EAN 3605340534986
Product type DIN NH transformer protection fuse-link
Fuse size NH4a
Utilisation category gTr
Transformer nominal capacity 315 kVA
Rated current 455 A
Rated voltage 400 V AC
Voltage type AC
Breaking capacity 100 kA AC
Indicator type Top indicator
Gripping lugs Live gripping lugs
Terminal material Silver-plated copper
Terminal type Plain blades
Body material Ceramic
Body width 72.9 mm
Product weight Approximately 2.2 kg
Power dissipation 32 W
RoHS compliant Yes
HS Code 85361090
Country of Manufacture Hungary
Device Type Fuse link
Fuse Type NH (DIN)
Fuse Size NH4a
Fuse Class gTr
Current 455 A

Frequently Asked Questions

What is the Mersen NH4AGTR315KVA-8 used for?

It is designed specifically to protect 315 kVA low voltage transformers against overload and short-circuit faults.

What is the rated current of this fuse-link?

The NH4AGTR315KVA-8 has a rated current of 455 A.

What does the gTr characteristic mean?

The gTr characteristic is specifically designed for transformer protection, allowing transformer energisation currents while providing rapid interruption of fault currents.

What voltage is this fuse-link rated for?

The NH4AGTR315KVA-8 operates at up to 400 V AC.

Where is this fuse-link installed?

It is installed in compatible NH size 4a fuse bases or fuse-switch disconnectors by qualified electrical personnel using approved NH fuse handling equipment.

Trusted by Electrical Professionals Worldwide

Mersen NH gTr transformer fuse-links are trusted by utilities, panel builders, OEMs and industrial engineers for dependable transformer protection, excellent current limitation and reliable long-term operation in demanding power distribution systems.

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