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MERSEN FUSE NH4AC 200KVA 400V GTR MI NH4AGTR200KVA
Mersen NH4AGTR200KVA NH4a gTr transformer fuse-link rated at 289 A and 400 V AC, with a centre indicator and live gripping lugs for protection of 200 kVA transformers.
£105.67
Why Choose the Mersen NH4AGTR200KVA Transformer Protection Fuse?
The Mersen NH4AGTR200KVA is a specialist DIN NH gTr transformer fuse-link designed to protect low-voltage transformers against overloads and short-circuit faults. Rated for a 200 kVA transformer, the fuse combines a 289 A rated current with a 400 V AC operating voltage, making it suitable for demanding industrial and commercial power distribution systems.
As part of Mersen’s transformer protection fuse range, the NH4AGTR200KVA features a gTr operating characteristic developed to accommodate normal transformer energisation and inrush currents while providing dependable disconnection during genuine fault conditions. This helps reduce unwanted fuse operation without compromising protection of the transformer and connected equipment.
The fuse is manufactured in the NH4a blade-contact format and incorporates live gripping lugs for handling with an appropriate NH fuse replacement device. A centre-mounted visual indicator assists maintenance personnel with identifying an operated fuse, while the robust construction supports reliable performance in switchboards, substations and transformer feeder assemblies.
Key Advantages
- Specifically designed for 200 kVA transformer protection.
- 289 A rated current for suitable low-voltage transformer circuits.
- 400 V AC voltage rating for industrial power distribution systems.
- gTr characteristic accommodates transformer inrush currents.
- Centre-mounted indicator enables convenient fuse-status inspection.
- Standard NH4a blade-contact format for compatible NH fuse bases.
Key Features
- Mersen NH transformer fuse-link range.
- NH4a fuse size.
- 200 kVA transformer rating.
- 289 A rated current.
- 400 V AC rated operating voltage.
- gTr transformer protection characteristic.
- Centre-mounted visual operating indicator.
- Live gripping lugs for professional fuse handling.
- Robust DIN NH blade-contact construction.
- 72.9 mm body width.
Reliable Protection for Low-Voltage Transformers
Transformer circuits can experience substantial current surges during energisation. The Mersen NH4AGTR200KVA uses a gTr time-current characteristic engineered to tolerate these normal inrush conditions while still interrupting dangerous overload and short-circuit currents that could damage the transformer, conductors or connected switchgear.
Its NH4a blade-contact construction supports secure installation in compatible fuse bases, while the centre indicator simplifies routine inspection and fault finding. Installation, removal and maintenance should be completed by suitably qualified personnel using the correct NH fuse-handling equipment.
Typical Applications
- Protection of 200 kVA low-voltage transformers.
- Industrial power distribution switchboards.
- Transformer feeder circuits.
- Commercial distribution systems.
- Electrical substations and plant rooms.
- OEM power distribution equipment.
Technical Specifications
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| Voltage | 400 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Current | 289 A | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links gTr 400 V AC | |
| Model | NH4AGTR200KVA | |
| Manufacturer part number | A1028721 | |
| Product type | DIN NH transformer fuse-link | |
| Fuse size | NH4a | |
| Transformer rating | 200 kVA | |
| Rated current | 289 A | |
| Rated operating voltage | 400 V AC | |
| Current type | AC | |
| Utilisation category | gTr | |
| Indicator position | Centre indicator | |
| Gripping lugs | Live gripping lugs | |
| Body width | 72.9 mm | |
| Contact type | NH blade contacts | |
| Mounting method | Compatible NH fuse base | |
| RoHS compliant | Yes | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AGTR200KVA used for?
The Mersen NH4AGTR200KVA is designed to protect a 200 kVA low-voltage transformer against overload and short-circuit faults.
What is the rated current of this fuse?
The NH4AGTR200KVA has a rated current of 289 A.
What operating voltage is supported?
This transformer fuse-link is rated for operation at up to 400 V AC.
What does the gTr characteristic mean?
The gTr characteristic is designed specifically for transformer protection, allowing normal energisation and inrush currents while providing effective protection during overload and short-circuit conditions.
What type of indicator does the fuse have?
The NH4AGTR200KVA features a centre-mounted visual indicator that assists with identifying when the fuse has operated.
Trusted for Transformer Circuit Protection
Mersen NH transformer fuse-links are trusted by electrical engineers, panel builders and power distribution specialists for dependable transformer protection and reliable fault interruption in demanding installations.
