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.
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.
