Why Choose the Mersen NH3GTR100KVA-8 Transformer Protection Fuse-Link?
The Mersen NH3GTR100KVA-8 is a high-performance DIN NH transformer protection fuse-link designed to protect low-voltage distribution transformers against overloads and short circuits. Featuring a specialised gTr operating characteristic, this NH Size 3 fuse-link provides a time-current response adapted specifically to transformer applications.
The NH3GTR100KVA-8 combines reliable current limitation with a high breaking capacity, helping minimise damage to transformers, switchgear and connected electrical equipment during fault conditions. Its characteristic is designed to accommodate normal transformer operating behaviour while providing precise interruption of potentially damaging overload currents.
With a rated current of 144 A, a rated voltage of 400 V AC and a transformer capacity rating of 100 kVA, the NH3GTR100KVA-8 is suitable for industrial and commercial power-distribution installations. It features live gripping lugs, silver-plated copper blade contacts and a top indicator for convenient visual identification of fuse operation.
Key Advantages
- Specialised gTr fuse characteristic for transformer protection.
- 100 kVA transformer capacity rating for low-voltage distribution applications.
- 144 A rated current at 400 V AC.
- High 100 kA AC breaking capacity for dependable fault interruption.
- High current-limiting performance helps reduce fault energy.
- Top indicator allows quick visual identification of fuse operation.
- Transformer-adapted characteristic helps reduce unnecessary interruptions.
Key Features
- Mersen NH gTr transformer protection fuse-link series.
- DIN NH Size 3 construction.
- 144 A rated current.
- 400 V AC rated voltage.
- 100 kVA nominal transformer capacity.
- 100 kA maximum AC breaking capacity.
- Top-mounted fuse operation indicator.
- Live gripping lugs for use with an appropriate NH fuse puller.
- Silver-plated copper plain-blade terminals.
- Durable ceramic insulating body.
The Mersen NH3GTR100KVA-8 uses a transformer-specific gTr characteristic to provide effective protection against overload and short-circuit conditions. Its time-current response is adapted to transformer behaviour, enabling it to tolerate permissible operating currents while disconnecting sustained overloads that could damage transformer windings and insulation.
The fuse-link offers high current limitation and reliable selectivity with downstream gG fuse-links. These characteristics make it a dependable protective component for transformer-fed distribution systems where operational continuity, equipment protection and predictable fault clearance are essential.
Typical Applications
- Protection of 100 kVA low-voltage transformers.
- Industrial power-distribution switchboards.
- Commercial building electrical systems.
- Transformer feeder circuits.
- Low-voltage switchgear assemblies.
- Manufacturing and processing facilities.
- Infrastructure and utility distribution installations.
