Why Choose the Mersen NH4A2GTR250KVA Transformer Protection Fuse-Link?
The Mersen NH4A2GTR250KVA is a heavy-duty DIN NH gTr low voltage transformer protection fuse-link designed to provide reliable overload and short-circuit protection for larger distribution transformers. Featuring a specialised gTr operating characteristic, it is engineered to accommodate transformer energisation currents while delivering fast and dependable fault interruption under abnormal operating conditions.
As part of the proven Mersen NH gTr 400 V AC fuse-link range, this NH4A2 size fuse-link is designed for protecting transformers with a nominal rating of 250 kVA. Its ceramic construction, centre-mounted blown-fuse indicator and live gripping lugs provide dependable performance and simplified maintenance within industrial and commercial electrical installations.
With a 361 A rated current, 400 V AC operating voltage and a 100 kA breaking capacity, the NH4A2GTR250KVA delivers exceptional protection for transformers, switchgear and low voltage power distribution systems where reliability is critical.
Key Advantages
- Purpose-designed gTr characteristic for transformer protection.
- Suitable for 250 kVA distribution transformers.
- 361 A rated current.
- 400 V AC operating voltage.
- 100 kA AC breaking capacity.
- Centre blown-fuse indicator for rapid status identification.
- Live gripping lugs improve handling during maintenance.
- Excellent current limitation reduces transformer and switchgear stress during faults.
Key Features
- Mersen NH gTr transformer protection fuse-link series.
- Catalogue number: NH4A2GTR250KVA.
- NH4A2 fuse size.
- 250 kVA transformer rating.
- 361 A rated current.
- 400 V AC rated voltage.
- Centre-mounted blown-fuse indicator.
- Live gripping lugs.
- Ceramic body with silver-plated blade contacts.
- Designed to IEC/DIN NH standards.
The Mersen NH4A2GTR250KVA is engineered specifically for transformer protection applications where conventional general-purpose fuse-links cannot provide optimum coordination. Its gTr characteristic allows normal transformer magnetising currents while delivering dependable protection against overload and short-circuit conditions.
Its high breaking capacity and current-limiting performance help minimise thermal and mechanical stress on transformers, cables and switchgear, contributing to improved reliability and reduced maintenance costs in low voltage distribution systems.
Typical Applications
- 250 kVA distribution transformers.
- Industrial transformer feeder panels.
- Commercial electrical distribution systems.
- Low voltage substations.
- Industrial switchgear assemblies.
- OEM power distribution equipment.
- Manufacturing facilities.
- Infrastructure and utility installations.
