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MERSEN FUSE NH4A 800KVA 400V GTR TI NH42GTR800KVA-8
Mersen NH42GTR800KVA-8 DIN NH4a gTr transformer protection fuse-link rated at 1155 A and 400 V AC for protecting 800 kVA distribution transformers.
£136.22
Why Choose the Mersen NH42GTR800KVA-8 Transformer Protection Fuse?
The Mersen NH42GTR800KVA-8 is a heavy-duty DIN NH gTr fuse-link specifically developed to protect large low voltage distribution transformers against overloads and short circuits. Manufactured by Mersen, this NH4a fuse-link features a specialised gTr operating characteristic that is optimised for transformer protection, allowing normal energisation currents while providing fast and dependable fault clearance.
Designed for demanding industrial and commercial power distribution systems, the NH42GTR800KVA-8 helps maximise transformer reliability by reducing nuisance fuse operation during transformer energisation. Its top-mounted visual indicator enables quick identification following fuse operation, simplifying maintenance and reducing downtime.
With a 1155 A rated current, 400 V AC rated voltage and suitability for 800 kVA transformers, this DIN NH4a fuse-link provides outstanding protection for substations, switchgear and high-capacity electrical distribution equipment. The live gripping lugs ensure compatibility with standard NH fuse bases used throughout industrial installations.
Key Advantages
- Purpose-designed DIN NH gTr transformer protection fuse-link.
- Suitable for protecting 800 kVA distribution transformers.
- 1155 A rated current for high-capacity installations.
- 400 V AC rated voltage for industrial power distribution.
- Specialised gTr operating characteristic for transformer protection.
- Integrated top indicator for rapid fuse status identification.
Key Features
- Mersen NH gTr fuse-link series.
- DIN NH Size 4a construction.
- 800 kVA transformer protection.
- 1155 A rated current.
- 400 V AC IEC rated voltage.
- gTr operating characteristic.
- Top-mounted operation indicator.
- Live gripping lugs for standard NH fuse bases.
Optimised Protection for High Capacity Distribution Transformers
Mersen gTr fuse-links are engineered specifically for transformer applications. Their carefully matched time-current characteristics accommodate transformer magnetising inrush currents while delivering rapid protection during overloads and short-circuit faults. This helps extend transformer service life and improve overall power system reliability.
The NH42GTR800KVA-8 is widely used by utilities, electrical contractors and switchboard manufacturers where dependable protection of high-capacity transformers is essential for industrial facilities, infrastructure and commercial power distribution.
Typical Applications
- 800 kVA distribution transformers.
- Industrial substations.
- Commercial power distribution systems.
- Switchboards and switchgear.
- Utility electrical infrastructure.
- OEM transformer protection panels.
Technical Specifications
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| Current | 1155 A | |
|---|---|---|
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links gTr 400 VAC | |
| Model | NH42GTR800KVA-8 | |
| Product type | DIN NH transformer protection fuse-link | |
| Fuse size | NH4a | |
| Rated current | 1155 A | |
| Rated voltage | 400 V AC | |
| Operating characteristic | gTr | |
| Transformer rating | 800 kVA | |
| Breaking capacity | 100 kA AC | |
| Frequency | 50 / 60 Hz | |
| Indicator type | Top indicator | |
| Body width | 98 mm | |
| Weight | Approx. 2.2 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH42GTR800KVA-8 used for?
This fuse-link is specifically designed to protect 800 kVA low voltage distribution transformers against overloads and short circuits.
What transformer size is this fuse designed for?
The NH42GTR800KVA-8 is designed for transformers with a nominal capacity of 800 kVA.
What voltage is this fuse rated for?
The fuse operates on 400 V AC low voltage electrical systems.
What does the gTr operating characteristic provide?
The gTr characteristic allows transformer energisation currents while providing effective protection against overloads and short circuits.
What type of indicator does this fuse include?
The NH42GTR800KVA-8 features an integrated top indicator for quick visual confirmation after fuse operation.
Trusted for Transformer Protection
Mersen NH gTr fuse-links are trusted worldwide by electrical engineers, utilities and panel builders for dependable transformer protection, excellent selectivity and long-term reliability in demanding power distribution applications.
