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MERSEN FUSE NH4A 315KVA400V.NH4A2GTR315KVA NH4A2GTR315KVA
Mersen NH4A2GTR315KVA NH4a gTr transformer fuse-link rated 455 A, 400 V AC for protection of 315 kVA low-voltage transformers.
£101.62
Why Choose the Mersen NH4A2GTR315KVA Transformer Fuse-Link?
The Mersen NH4A2GTR315KVA is a specialist NH4a size gTr transformer fuse-link engineered to provide dependable protection for 315 kVA low-voltage transformers. Rated at 455 A and 400 V AC, it is specifically designed to protect transformer circuits while maintaining reliable operation during normal energisation and temporary overload conditions.
Its gTr operating characteristic is developed specifically for transformer protection, allowing the fuse-link to withstand magnetising inrush currents while providing reliable protection against sustained overloads and high prospective short-circuit currents. The characteristic also supports excellent selectivity when coordinated with downstream NH gG fuse-links.
Manufactured to DIN NH standards, the NH4A2GTR315KVA features a heavy-duty ceramic body, silver-plated copper blade contacts, live gripping lugs and a centre-mounted indicator for rapid identification of fuse operation. Its NH4a construction enables installation into compatible NH fuse bases and fuse-switch disconnectors used in industrial power distribution systems.
Key Advantages
- Purpose-designed for 315 kVA transformer protection.
- 455 A rated current for correctly coordinated transformer circuits.
- 400 V AC operating voltage for industrial power distribution.
- gTr characteristic withstands transformer energisation and temporary overloads.
- Excellent selectivity with downstream NH gG fuse-links.
- Centre indicator provides rapid fuse status identification.
- Live gripping lugs allow safe replacement using an approved NH fuse puller.
Key Features
- Mersen NH gTr transformer fuse-link series.
- NH4a fuse size.
- 315 kVA transformer rating.
- 455 A rated current.
- 400 V AC rated voltage.
- gTr transformer protection characteristic.
- Centre-mounted operation indicator.
- Live gripping lugs.
- Silver-plated copper blade contacts.
- High-strength ceramic body.
- 72.9 mm body width.
Optimised Protection for Distribution Transformers
The Mersen NH4A2GTR315KVA is engineered specifically for low-voltage transformer protection. Its time-current characteristic follows the thermal behaviour of distribution transformers, allowing normal energisation and temporary overload conditions without nuisance operation while still providing dependable protection against damaging faults.
When correctly coordinated, gTr fuse-links provide excellent discrimination with downstream protective devices, helping isolate transformer faults whilst maintaining continuity of supply to unaffected circuits. Installation should always be completed by qualified electrical professionals using compatible NH4a equipment.
Typical Applications
- 315 kVA low-voltage distribution transformers.
- Industrial power distribution systems.
- Transformer secondary protection.
- Main switchboards.
- Commercial electrical distribution.
- NH fuse-switch disconnectors and transformer 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 | |
| Series | NH gTr Transformer Fuse-Links | |
| Model | NH4A2GTR315KVA | |
| Manufacturer part number | C1028723 | |
| Product type | NH transformer fuse-link | |
| Fuse size | NH4a | |
| Utilisation category | gTr | |
| Transformer rating | 315 kVA | |
| Rated current | 455 A | |
| Rated operating voltage | 400 V AC | |
| Current type | AC | |
| Indicator | Centre indicator | |
| Gripping lug design | Live gripping lugs | |
| Contact type | NH blade contacts | |
| Body material | Ceramic | |
| Body width | 72.9 mm | |
| Power dissipation | 32 W | |
| Weight | approx. 2.2 kg | |
| EAN | 3605340535471 | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen NH4A2GTR315KVA used for?
It is specifically designed to protect 315 kVA low-voltage transformers against overload and short-circuit faults.
What are the current and voltage ratings?
The fuse-link is rated at 455 A with a rated operating voltage of 400 V AC.
What does the gTr characteristic mean?
The gTr characteristic is specifically developed for transformer protection, allowing normal transformer energisation and temporary overloads whilst providing dependable fault protection.
What fuse size is the NH4A2GTR315KVA?
This product is an NH4a size fuse-link with a body width of approximately 72.9 mm.
Which fuse holder is compatible?
The NH4A2GTR315KVA is designed for compatible NH4a fuse bases and fuse-switch disconnectors. Installation should only be carried out by qualified electrical personnel.
Trusted Transformer Protection
Mersen gTr transformer fuse-links are trusted worldwide by electrical engineers, panel builders and power distribution specialists for dependable low-voltage transformer protection and excellent coordination with downstream protective devices.
