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MERSEN FUSE NH4A 1000KVA 400V GTR TI NH42GR1000KVA-8
Mersen NH42GR1000KVA-8 DIN NH Size 4a gTr transformer fuse link for 1000 kVA transformers, rated 400 V AC and 1443 A with live gripping lugs and top indicator.
£136.22
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.
Reliable Protection for High-Capacity Distribution Transformers
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.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 1443 A | |
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Manufacturer | Mersen | |
| Series | NH gTr 400 V Transformer Fuse Links | |
| Model | NH42GR1000KVA-8 | |
| Manufacturer reference | B1029067 | |
| Product type | DIN NH transformer fuse link | |
| Fuse category | gTr | |
| NH size | NH4a | |
| Transformer nominal capacity | 1000 kVA | |
| Rated current | 1443 A | |
| Rated voltage | 400 V AC | |
| Indicator | Top indicator | |
| Gripping lugs | Live gripping lugs | |
| Body width | 98 mm | |
| Approximate weight | 2.2 kg | |
| Typical mounting | NH4a fuse base | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH42GR1000KVA-8 used for?
It is specifically designed to protect 1000 kVA low-voltage distribution transformers against overloads and high fault currents.
What transformer size is this fuse designed for?
The NH42GR1000KVA-8 is intended for transformers with a nominal capacity of 1000 kVA.
What are the voltage and current ratings?
This fuse is rated at 400 V AC with a 1443 A current rating.
What does the gTr characteristic provide?
The gTr characteristic is specifically developed for transformer protection, allowing transformer energisation currents while providing dependable fault protection and selectivity.
Why does this fuse include a top indicator?
The integrated top indicator provides a clear visual indication after fuse operation, allowing maintenance personnel to identify and replace the fuse quickly and safely.
Trusted by Power Distribution Professionals Worldwide
Mersen NH gTr transformer fuse links are trusted by utilities, panel builders, transformer manufacturers and industrial electrical engineers for dependable protection of low-voltage distribution transformers and critical power infrastructure.
