Why Choose the Mersen NH3GTR125KVA-1 Transformer Fuse-Link?
The Mersen NH3GTR125KVA-1 is a specialised NH gTr low voltage transformer fuse-link designed to provide reliable protection for distribution transformers. Its transformer-specific time-current characteristic accommodates normal magnetising inrush currents while protecting the transformer against sustained overloads and damaging short-circuit faults.
As part of the Mersen NH gTr 400 V AC fuse-link series, the NH3GTR125KVA-1 delivers high current limitation, dependable fault interruption and effective selectivity with downstream gG fuse-links. Its centre-mounted indicator enables rapid visual identification after operation, while the isolated gripping tags improve protection for maintenance personnel when the fuse-link is handled with an approved NH fuse replacement device.
Designed for transformers with a nominal rating of 125 kVA, the fuse-link has a rated current of 180 A and an operating voltage of 400 V AC. Its NH3 construction makes it suitable for industrial switchgear, transformer substations, commercial distribution systems and electrical infrastructure requiring precisely coordinated transformer protection.
Key Advantages
- Transformer-specific gTr operating characteristic.
- Designed for transformers rated at 125 kVA.
- 180 A rated current for low voltage transformer protection.
- 400 V AC operating voltage.
- High 100 kA breaking capacity for reliable fault interruption.
- Isolated gripping tags improve safety during approved fuse handling procedures.
- Centre indicator allows rapid identification of an operated fuse-link.
- Provides effective selectivity with suitable downstream gG fuse-links.
Key Features
- Mersen NH gTr 400 V AC transformer fuse-link series.
- 125 kVA nominal transformer rating.
- 180 A rated current.
- 400 V AC rated voltage.
- NH3 fuse size.
- Centre-mounted fuse operation indicator.
- Isolated gripping tag design.
- Silver-plated copper blade contacts.
- Robust ceramic insulating body.
- DIN NH clip-mounted configuration.
The Mersen NH3GTR125KVA-1 uses a gTr characteristic specifically adapted to the operating behaviour of transformers. It can accommodate temporary energisation and loading currents while providing precise interruption when overload or short-circuit conditions threaten the transformer and associated electrical equipment.
High current limitation helps reduce the thermal and mechanical stresses produced during electrical faults. The isolated gripping tags, centre indicator and standard NH3 format also support safe maintenance, clear fuse status identification and straightforward installation in compatible NH fuse bases by qualified electrical personnel.
Typical Applications
- 125 kVA distribution transformer protection.
- Industrial transformer substations.
- Commercial electrical distribution systems.
- Low voltage switchgear assemblies.
- Manufacturing and processing facilities.
- Building services power distribution.
- Infrastructure and utility installations.
