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MERSEN FUSE NH3C 250KVA 400V GTR/1 NH3GTR250KVA
Mersen NH3GTR250KVA NH3 gTr transformer protection fuse-link rated at 361 A and 400 V AC for 250 kVA distribution transformers, with live gripping lugs and a centre indicator.
£36.98
Why Choose the Mersen NH3GTR250KVA Transformer Protection Fuse-Link?
The Mersen NH3GTR250KVA is a specialist DIN NH gTr low-voltage fuse-link designed specifically for the protection of distribution transformers. Rated for a 250 kVA transformer, with a 361 A rated current and 400 V AC operating voltage, this NH Size 3 fuse-link provides dependable protection while accommodating normal transformer energisation currents.
Part of Mersen's dedicated NH gTr transformer protection range, the NH3GTR250KVA features live gripping lugs and a centre indicator. The centre indicator provides clear visual confirmation after the fuse-link has operated, while the gripping lugs allow handling with an approved low-voltage HRC fuse replacement device.
The fuse-link's gTr time-current characteristic is specifically adapted to transformer operating conditions. It provides improved selectivity with downstream gG fuse-links and helps protect the transformer, cables and associated switchgear against damaging overload and short-circuit currents.
Key Advantages
- Purpose-designed for distribution transformer protection.
- Matched to transformers with a rating of 250 kVA.
- 361 A rated current for high-capacity transformer circuits.
- 400 V AC voltage rating for low-voltage distribution systems.
- gTr characteristic accommodates normal transformer energisation currents.
- Improved selectivity with downstream gG fuse protection.
- Centre indicator allows rapid identification after fuse operation.
Key Features
- Mersen NH gTr 400 V AC fuse-link range.
- Catalogue reference: NH3GTR250KVA.
- Manufacturer item number: P1030505A.
- 250 kVA transformer rating.
- 361 A rated current.
- 400 V AC rated voltage.
- NH Size 3 construction.
- gTr transformer protection characteristic.
- Centre indication system.
- Live, non-isolated gripping lugs.
Reliable Protection for Distribution Transformers
The Mersen NH3GTR250KVA is engineered to match the operating characteristics of a distribution transformer. Its gTr response tolerates temporary magnetising inrush currents during transformer energisation while providing reliable interruption when sustained overload or short-circuit conditions occur.
This specialised characteristic can improve coordination between the transformer fuse-link and downstream protective devices. Its current-limiting action also helps reduce the thermal and electrodynamic stresses placed on the transformer, cables and switchgear during severe electrical faults.
Typical Applications
- 250 kVA distribution transformer protection.
- Industrial substations and transformer panels.
- Commercial power distribution systems.
- Transformer switchgear and fuse bases.
- Manufacturing and processing facilities.
- Low-voltage electrical infrastructure.
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 gTr 400 V AC Fuse-Links | |
| Model | NH3GTR250KVA | |
| Manufacturer reference | P1030505A | |
| Product type | NH transformer protection fuse-link | |
| Utilisation category | gTr | |
| Fuse size | NH3 | |
| Transformer rating | 250 kVA | |
| Rated current | 361 A | |
| Rated voltage | 400 V AC | |
| Current type | AC | |
| Body width | 50 mm | |
| Indicator | Centre indicator | |
| Gripping lugs | Live, non-isolated | |
| Contact type | NH blade contacts | |
| Mounting | Compatible NH3 fuse base or switch-fuse disconnector | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH3GTR250KVA used for?
It is designed specifically to protect 250 kVA distribution transformers and associated electrical equipment against overload and short-circuit faults.
What is the current rating of the NH3GTR250KVA?
The Mersen NH3GTR250KVA has a rated current of 361 A.
What does the gTr characteristic mean?
The gTr characteristic is adapted specifically for transformer protection, allowing normal transformer energisation currents while providing dependable overload and short-circuit protection.
What voltage is this fuse-link rated for?
This transformer protection fuse-link is rated for operation at 400 V AC.
What type of indicator does this fuse-link have?
The NH3GTR250KVA features a centre indicator that provides clear visual confirmation when the fuse-link has operated.
Trusted by Electrical Professionals Worldwide
Mersen NH gTr fuse-links are widely selected by utilities, panel builders, electrical contractors and industrial engineers requiring dependable protection and effective selectivity for distribution transformers.
