Why Choose the Mersen NH3GTR125KVA-8 Transformer Protection Fuse Link?
The Mersen NH3GTR125KVA-8 is a specialised DIN NH gTr fuse link designed to protect low-voltage distribution transformers against overload and short-circuit conditions. Its transformer-specific time-current characteristic is carefully matched to transformer operating behaviour, helping provide dependable protection without unnecessary operation during normal energisation.
Part of the Mersen NH gTr 400 V AC fuse-link range, the NH3GTR125KVA-8 is manufactured in the NH3 format and features live gripping lugs with a top-mounted blown-fuse indicator. This arrangement supports rapid visual identification of an operated fuse and straightforward replacement by a qualified electrical professional using an approved NH fuse puller.
With a transformer rating of 125 kVA, a rated current of 180 A and an operating voltage of 400 V AC, this fuse link is suitable for transformer feeders, industrial switchboards, commercial distribution systems and low-voltage substations requiring reliable transformer protection.
Key Advantages
- Purpose-designed gTr fuse link for transformer protection.
- Matched to transformers with a nominal rating of 125 kVA.
- 180 A rated current for low-voltage transformer circuits.
- 400 V AC rating for industrial and commercial distribution systems.
- Transformer-specific characteristic supports reliable selectivity with gG fuse links.
- Top indicator enables quick identification of an operated fuse.
- Standard DIN NH construction supports installation in compatible NH fuse equipment.
Key Features
- Mersen NH gTr transformer fuse-link series.
- 125 kVA transformer rating.
- 180 A rated current.
- 400 V AC rated operating voltage.
- NH3 fuse-link size.
- Full-range gTr transformer protection characteristic.
- Top-mounted blown-fuse indicator.
- Live gripping lugs.
- 50 mm body width.
- DIN NH blade-contact construction.
gTr fuse links are engineered around the thermal and electrical characteristics of distribution transformers. Their operating curve allows normal transformer magnetising inrush while providing effective interruption when sustained overloads or high short-circuit currents threaten the transformer and connected equipment.
The NH3GTR125KVA-8 also supports effective coordination with suitable downstream gG fuse links. When selected and installed correctly, this helps isolate faults selectively, reduce unnecessary disruption to unaffected circuits and protect valuable transformer assets.
Typical Applications
- 125 kVA low-voltage distribution transformers.
- Transformer incomers and outgoing feeders.
- Industrial switchboards and distribution panels.
- Commercial building power distribution.
- Low-voltage substations.
- Manufacturing and process installations.
