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MERSEN FUSE NH3 630KVA 400V GTR TI NH32GTR630KVA-8
Mersen NH32GTR630KVA-8 NH3 gTr transformer fuse-link rated at 909 A and 400 V AC for protecting 630 kVA distribution transformers.
£47.59
Why Choose the Mersen NH32GTR630KVA-8 Transformer Fuse-Link?
The Mersen NH32GTR630KVA-8 is a high-performance NH gTr low voltage transformer fuse-link developed specifically to protect distribution transformers against overloads and short circuits. Its transformer-matched time-current characteristic provides dependable protection while accommodating the temporary inrush currents produced when a transformer is energised.
As part of the specialised Mersen NH gTr 400 V AC fuse-link series, the NH32GTR630KVA-8 offers high current-limiting performance, excellent selectivity with downstream gG fuse-links and reliable operation in demanding power distribution environments. Its top-mounted indicator allows maintenance teams to identify an operated fuse quickly, while the live gripping tags support removal with a suitable NH fuse replacement device.
Designed for 630 kVA transformers, this NH3 fuse-link has a rated current of 909 A and an operating voltage of 400 V AC. It is suitable for transformer substations, industrial switchgear, commercial distribution systems and infrastructure applications requiring robust, precisely coordinated transformer protection.
Key Advantages
- Specially engineered gTr characteristic for transformer protection.
- Matched to transformers with a nominal rating of 630 kVA.
- 909 A rated current for high-power distribution applications.
- 400 V AC operating voltage.
- High current limitation and breaking capacity improve installation safety.
- Optimised selectivity with downstream gG fuse-links.
- Top indicator enables rapid visual identification after operation.
- Live gripping tags support controlled removal using an approved NH fuse puller.
Key Features
- Mersen NH gTr 400 V AC transformer fuse-link series.
- 630 kVA nominal transformer rating.
- 909 A rated current.
- 400 V AC rated operating voltage.
- NH3 fuse size.
- Transformer-specific gTr operating characteristic.
- Top-mounted fuse operation indicator.
- Live gripping tag configuration.
- Robust ceramic fuse body.
- Silver-plated copper contacts.
Reliable Protection for High-Power Transformers
The Mersen NH32GTR630KVA-8 uses a gTr time-current characteristic tailored specifically to the operating behaviour of distribution transformers. This allows the fuse-link to tolerate normal transformer energisation and loading conditions while providing precise interruption when sustained overloads or damaging short-circuit currents occur.
Its high breaking capacity and strong current-limiting performance help reduce the electrical and thermal stress placed on transformers, conductors and switchgear during a fault. The fuse-link also provides coordinated selectivity with suitable downstream gG protection, helping isolate affected circuits without unnecessarily interrupting the wider electrical installation.
Typical Applications
- 630 kVA distribution transformer protection.
- Industrial transformer substations.
- Low voltage switchgear assemblies.
- Commercial power distribution systems.
- Manufacturing and processing facilities.
- Infrastructure and utility installations.
- Transformer control and protection panels.
Technical Specifications
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| Voltage | 400 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH3 | |
| Fuse Class | gTr | |
| Current | 909 A | |
| Manufacturer | Mersen | |
| Series | NH Fuse-Links gTr 400 V AC | |
| Model | NH32GTR630KVA-8 | |
| Item number | W1028717A | |
| Product type | NH transformer fuse-link | |
| Fuse characteristic | gTr | |
| Nominal transformer rating | 630 kVA | |
| Rated current | 909 A | |
| Rated operating voltage | 400 V AC | |
| AC breaking capacity | 100 kA | |
| Fuse size | NH3 | |
| Indicator type | Top indicator | |
| Gripping tag type | Live tags | |
| Mounting type | Clip mounting | |
| Body width | 71 mm | |
| Body material | Ceramic | |
| Contact material | Silver-plated copper | |
| Power dissipation at rated current | 62 W | |
| Weight | Approx. 1 kg | |
| EAN / UPC | 3605340534559 | |
| Standards | IEC 60269-1, IEC 60269-2 and VDE 0636 Part 201 | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH32GTR630KVA-8 used for?
This NH gTr fuse-link is designed to protect distribution transformers against overloads and short circuits while accommodating normal transformer energisation currents.
What transformer rating is supported by this fuse-link?
The NH32GTR630KVA-8 is matched to transformers with a nominal rating of 630 kVA.
What is the rated current of the NH32GTR630KVA-8?
The fuse-link has a rated current of 909 A.
What does the gTr characteristic mean?
The gTr characteristic is specifically adapted to transformer protection, allowing normal magnetising inrush currents while providing full-range protection against overloads and short circuits.
What type of indicator does this fuse-link include?
The NH32GTR630KVA-8 includes a top-mounted indicator that provides a visible indication when the fuse-link has operated.
Trusted for Transformer Protection
Mersen NH gTr fuse-links are widely specified by electrical engineers, panel builders and power distribution professionals for precise transformer protection, strong current limitation and dependable fault interruption.
