Why Choose the Mersen NH22GTR200KVA-8 Transformer Fuse-Link?
The Mersen NH22GTR200KVA-8 is a specialised NH size 2 gTr fuse-link designed to protect low-voltage transformers against overload and short-circuit currents. Rated for a 200 kVA transformer, with a nominal current of 289 A and an operating voltage of 400 V AC, it provides coordinated protection for demanding industrial power distribution systems.
Its gTr operating characteristic is specifically matched to the thermal behaviour and permissible overload capability of transformers. This enables the fuse-link to withstand normal transformer inrush and temporary loading conditions while operating when sustained or dangerous overcurrents threaten the transformer and connected equipment.
The NH22GTR200KVA-8 features a durable ceramic body, standard NH blade contacts, live gripping lugs and a convenient top-mounted indicator. Its DIN NH2 construction allows installation in compatible NH fuse bases, fuse-switch disconnectors and distribution assemblies used in industrial and commercial transformer installations.
Key Advantages
- Specially designed for low-voltage transformer protection.
- Matched to transformers rated at approximately 200 kVA.
- 289 A rated current for correctly coordinated transformer circuits.
- 400 V AC operating voltage for industrial distribution networks.
- gTr characteristic accommodates normal transformer loading and inrush conditions.
- Supports improved selectivity with downstream gG fuse protection.
- Top indicator allows convenient identification of fuse operation.
Key Features
- Mersen NH gTr transformer fuse-link series.
- NH2 fuse size.
- 200 kVA transformer rating.
- 289 A rated current.
- 400 V AC rated operating voltage.
- gTr transformer-protection characteristic.
- Top-mounted fuse operation indicator.
- Live, non-isolated gripping lugs.
- Standard DIN NH blade contacts.
- Robust ceramic insulating body.
- 50 mm body width.
The Mersen NH22GTR200KVA-8 is engineered around the operating characteristics of low-voltage transformers. Its time-current response permits temporary transformer loading and magnetising inrush while providing protection against sustained overloads and high fault currents.
Mersen gTr fuse-links can tolerate elevated current for controlled periods, helping avoid unnecessary operation during permissible transformer loading. Their transformer-specific characteristic also supports effective selectivity with downstream gG fuse-links, helping isolate faults while maintaining continuity elsewhere in the distribution system.
Typical Applications
- Low-voltage transformer protection.
- Industrial power distribution systems.
- Commercial building distribution boards.
- Transformer secondary circuits.
- Factory and process plant switchgear.
- NH fuse-switch disconnectors and distribution assemblies.
