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MERSEN FUSE NH4AC 125KVA 400V GTR MI NH4AGTR125KVA
Mersen NH4AGTR125KVA DIN NH4a gTr transformer protection fuse-link rated at 180 A and 400 V AC for protecting 125 kVA distribution transformers.
£105.67
Why Choose the Mersen NH4AGTR125KVA Transformer Protection Fuse?
The Mersen NH4AGTR125KVA is a premium DIN NH gTr fuse-link developed specifically for protecting low voltage distribution transformers against overloads and short circuits. Manufactured by Mersen, this NH4a fuse-link is engineered with a transformer-specific time-current characteristic that provides reliable protection while accommodating normal transformer energisation currents.
The specialised gTr characteristic allows the fuse-link to withstand transformer inrush currents during energisation while delivering rapid disconnection under fault conditions. This helps maximise transformer service life, improves system reliability and reduces unnecessary downtime across industrial and commercial electrical installations.
Designed for protecting 125 kVA distribution transformers, the NH4AGTR125KVA features a 400 V AC rated voltage, 180 A rated current, NH4a size construction and an integrated centre indicator for quick visual identification following fuse operation.
Key Advantages
- Purpose-built DIN NH gTr fuse-link for transformer protection.
- Suitable for 125 kVA distribution transformers.
- 180 A rated current for dependable transformer protection.
- 400 V AC rated voltage for low voltage distribution systems.
- Specialised gTr operating characteristic optimised for transformer applications.
- Integrated centre indicator for fast fuse status identification.
Key Features
- Mersen NH gTr fuse-link series.
- DIN NH Size 4a construction.
- 125 kVA transformer protection.
- 180 A rated current.
- 400 V AC IEC rated voltage.
- gTr operating characteristic.
- Integrated centre operation indicator.
- Live gripping lugs for standard NH fuse bases.
Optimised Protection for Distribution Transformers
Unlike standard general-purpose fuse-links, Mersen gTr fuse-links are specifically designed for transformer protection. Their carefully matched operating characteristics accommodate transformer magnetising currents while providing rapid fault interruption, helping maximise equipment protection and system availability.
The NH4AGTR125KVA is widely specified by electrical engineers, switchboard manufacturers and industrial contractors where dependable transformer protection is required for commercial buildings, industrial plants and infrastructure projects.
Typical Applications
- Low voltage distribution transformers.
- Industrial substations.
- Commercial electrical distribution systems.
- Power distribution switchboards.
- Utility transformer protection.
- OEM electrical panels and switchgear.
Technical Specifications
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| Voltage | 400 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Current | 180 A | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links gTr 400 VAC | |
| Model | NH4AGTR125KVA | |
| Product type | DIN NH transformer protection fuse-link | |
| Fuse size | NH4a | |
| Rated current | 180 A | |
| Rated voltage | 400 V AC | |
| Operating characteristic | gTr | |
| Transformer rating | 125 kVA | |
| Frequency | 50 / 60 Hz | |
| Indicator type | Centre indicator | |
| Body width | 72.9 mm | |
| Weight | Approx. 2.2 kg | |
| Compliance | IEC / DIN NH standards | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4AGTR125KVA used for?
This fuse-link is specifically designed to protect low voltage distribution transformers from overloads and short circuits.
What transformer size is this fuse designed for?
The NH4AGTR125KVA is designed for transformers with a nominal rating of 125 kVA.
What voltage is this fuse rated for?
The fuse operates on 400 V AC low voltage electrical systems.
What does the gTr characteristic provide?
The gTr characteristic is optimised for transformer protection, allowing transformer energisation currents while providing rapid protection against overloads and short circuits.
What type of indication does this fuse include?
The NH4AGTR125KVA features an integrated centre indicator that provides clear visual confirmation after fuse operation.
Trusted for Transformer Protection
Mersen NH gTr fuse-links are trusted worldwide by electrical engineers, panel builders and utilities for reliable transformer protection, excellent selectivity and dependable long-term performance in demanding power distribution systems.
