Why Choose the Mersen NH42GR1000KVA-8 Transformer Protection Fuse?
The Mersen NH42GR1000KVA-8 is a heavy-duty DIN NH gTr fuse link specifically engineered to protect large low-voltage distribution transformers. Developed to IEC standards, this NH Size 4a fuse provides transformer-specific protection by accommodating transformer energisation currents while delivering rapid interruption of overloads and fault currents, ensuring dependable operation in demanding power distribution systems.
As part of the proven Mersen NH gTr 400 V transformer fuse series, the NH42GR1000KVA-8 incorporates live gripping lugs with a top indicator for quick visual identification following fuse operation. Its robust ceramic construction, high current-limiting capability and high breaking capacity make it an excellent solution for protecting high-capacity transformers used in industrial plants, utilities and commercial electrical infrastructure.
Designed for 1000 kVA distribution transformers, this fuse has a 1443 A rated current and is intended for 400 V AC systems. The transformer-specific gTr characteristic helps reduce unnecessary interruptions while maintaining reliable fault protection.
Key Advantages
- Purpose-designed gTr transformer protection fuse link.
- Suitable for protecting 1000 kVA low-voltage transformers.
- 1443 A rated current for high-power applications.
- 400 V AC operating voltage.
- Transformer-specific characteristic accommodates energisation inrush current.
- Top indicator enables rapid identification of an operated fuse.
- Live gripping lugs allow safe replacement using an approved NH fuse puller.
Key Features
- Mersen NH gTr transformer fuse series.
- Catalogue number: NH42GR1000KVA-8.
- NH Size 4a fuse link.
- Transformer rating: 1000 kVA.
- 1443 A rated current.
- 400 V AC rated voltage.
- gTr utilisation category.
- Top fuse-operation indicator.
- Live gripping lugs.
- Ceramic body construction.
The NH42GR1000KVA-8 has been specifically engineered to protect large distribution transformers. Its gTr operating characteristic tolerates transformer magnetising inrush currents while providing precise interruption of overloads and short-circuit faults, reducing unnecessary service interruptions and extending transformer reliability.
Its high current-limiting performance, robust ceramic construction and compatibility with standard NH fuse systems make it an ideal solution for utilities, OEM switchboards, industrial power systems and commercial transformer installations.
Typical Applications
- 1000 kVA low-voltage distribution transformers.
- Industrial power distribution systems.
- Utility substations.
- Main LV switchboards.
- Commercial electrical infrastructure.
- OEM transformer and switchboard assemblies.
