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MERSEN FUSE NH3C 250KVA 400V GTR SGL MI NH3GTR250KVA-1
Mersen NH3GTR250KVA-1 NH3 gTr transformer fuse link rated at 250 kVA, 361 A and 400 V AC, with a centre indicator and isolated gripping lugs for low-voltage transformer protection.
£44.36
Why Choose the Mersen NH3GTR250KVA-1 Transformer Fuse?
The Mersen NH3GTR250KVA-1 is a high-performance NH gTr transformer fuse link designed to protect low-voltage distribution transformers against overloads and short-circuit faults. Manufactured to DIN NH standards, this full-range fuse uses a time-current characteristic specifically developed for transformer protection in industrial, commercial and infrastructure power distribution systems.
As part of the trusted Mersen NH gTr fuse-link range, the NH3GTR250KVA-1 provides dependable fault interruption while accommodating the normal operating characteristics of transformers. Its gTr utilisation category allows transformer energisation and temporary loading conditions while ensuring controlled disconnection during sustained overloads or severe electrical faults.
With a 250 kVA transformer rating, 361 A rated current and a 400 V AC operating voltage, this NH3 fuse link is suitable for demanding transformer protection applications. Its centre-mounted indicator and isolated gripping lugs support convenient inspection and safer handling within compatible NH fuse bases and switchgear.
Key Advantages
- Purpose-designed NH gTr fuse link for transformer protection.
- 250 kVA transformer rating for substantial low-voltage distribution systems.
- 361 A rated current with a 400 V AC voltage rating.
- Full-range protection against transformer overloads and short circuits.
- 100 kA breaking capacity for dependable fault interruption.
- Isolated gripping lugs and centre indicator support safe maintenance and rapid status identification.
Key Features
- Mersen NH gTr transformer fuse-link series.
- NH3 fuse size.
- 250 kVA rated transformer capacity.
- 361 A rated current.
- 400 V AC rated voltage.
- gTr full-range utilisation category.
- Centre-mounted fuse operation indicator.
- Isolated gripping lugs for handling with a suitable NH fuse puller.
Reliable Protection for Distribution Transformers
The Mersen NH3GTR250KVA-1 uses a gTr operating characteristic specifically matched to the electrical behaviour of distribution transformers. This enables the fuse to tolerate normal transformer energisation and operating conditions while protecting the installation against sustained overloads and high short-circuit currents.
Its high breaking capacity and current-limiting performance help reduce thermal and mechanical stress on transformers, conductors and switchgear during serious electrical faults. The centre indicator provides a clear visual indication after fuse operation, while the isolated gripping lugs improve protection for qualified personnel during removal and replacement.
Typical Applications
- Protection of 250 kVA low-voltage distribution transformers.
- Industrial power distribution systems.
- Commercial building electrical installations.
- Transformer feeder panels and switchgear.
- Electrical substations and distribution cabinets.
- Utility, infrastructure and manufacturing facilities.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH3 | |
| Fuse Class | gTr | |
| Current | 361 A | |
| Manufacturer | Mersen | |
| Series | NH Fuse-links gTr 400 V AC | |
| Model | NH3GTR250KVA-1 | |
| Manufacturer reference | Z1030537A | |
| Product type | NH transformer fuse link | |
| Fuse size | NH3 | |
| Utilisation category | gTr | |
| Transformer rating | 250 kVA | |
| Rated current | 361 A | |
| Rated voltage | 400 V AC | |
| Voltage type | AC | |
| Breaking capacity | 100 kA AC | |
| Power dissipation at rated current | 21 W | |
| Indicator | Centre indicator | |
| Gripping lugs | Isolated gripping lugs | |
| Body width | 53.1 mm | |
| Fuse system | DIN NH blade-contact system | |
| GTIN / EAN | 3605340535747 | |
| Applicable standard | IEC 60269 NH fuse format | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH3GTR250KVA-1 used for?
This NH gTr fuse link is designed to protect 250 kVA low-voltage distribution transformers against sustained overloads and short-circuit faults.
What is the rated current of this transformer fuse?
The Mersen NH3GTR250KVA-1 has a rated current of 361 A.
What voltage is the NH3GTR250KVA-1 rated for?
This transformer fuse link is rated for operation at 400 V AC.
What does the gTr utilisation category mean?
The gTr category identifies a full-range fuse designed specifically for transformer protection, covering both overload and short-circuit fault conditions.
Does this fuse have isolated gripping lugs?
Yes. The NH3GTR250KVA-1 features isolated gripping lugs for handling with a suitable NH fuse replacement device by qualified personnel.
Trusted Transformer Protection from Mersen
Mersen NH gTr fuse links are trusted by electrical engineers, panel builders and power distribution professionals for reliable transformer protection, high fault interruption performance and dependable operation in demanding low-voltage installations.
