Why Choose the Mersen NH4AGTR100KVA Transformer Fuse Link?
The Mersen NH4AGTR100KVA is a specialised NH4a size gTr fuse link developed for protecting distribution transformers in low-voltage power systems. Designed for 100 kVA transformers, this fuse is rated at 144 A and 400 V AC, providing reliable transformer protection while accommodating the high inrush currents that occur during energisation.
Its gTr operating characteristic is specifically engineered for transformer applications. Unlike general-purpose gG fuse links, the gTr time/current curve is matched to transformer operating characteristics, allowing temporary magnetising currents to pass without nuisance operation while providing dependable protection against overloads and short-circuit faults.
The fuse features a robust ceramic body, live gripping tags and a centre fuse indicator for easy identification of an operated fuse. Its NH4a design is intended for installation in compatible NH fuse bases and switch-fuse disconnectors used in industrial and utility transformer installations.
Key Advantages
- Designed specifically for 100 kVA transformer protection.
- 144 A rated current matched to transformer applications.
- 400 V AC operating voltage.
- Special gTr transformer protection characteristic.
- Allows transformer energisation without nuisance fuse operation.
- Centre indicator enables rapid identification of an operated fuse.
Key Features
- Mersen NH gTr transformer fuse series.
- NH4a fuse size.
- 144 A rated current.
- 400 V AC rated voltage.
- 100 kVA transformer rating.
- gTr transformer protection characteristic.
- Integrated centre fuse indicator.
- Live gripping tags for safe handling.
- Standard NH blade contacts.
- RoHS compliant construction.
The Mersen NH4AGTR100KVA is specifically designed to protect distribution transformers from damaging overloads and short-circuit faults while accommodating normal transformer magnetising inrush current. The specialised gTr characteristic provides excellent coordination with transformer operating behaviour, improving system reliability and reducing unnecessary fuse replacement.
The fuse should be installed in a compatible NH4a fuse base or switch disconnector and handled only by qualified electrical personnel using an approved NH fuse puller and suitable personal protective equipment.
Typical Applications
- 100 kVA distribution transformers.
- Industrial transformer protection.
- Low-voltage transformer switchgear.
- Electrical substations.
- Commercial power distribution systems.
- Utility and industrial electrical installations.
