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MERSEN FUSE NH4A 200KVA 400V GTR NH4A2GTR200KVA
Mersen NH4A2GTR200KVA DIN NH size 4a2 gTr transformer fuse-link rated for 200 kVA transformers, 289 A and 400 V AC with centre indicator and live gripping lugs.
£101.62
Why Choose the Mersen NH4A2GTR200KVA Transformer Protection Fuse?
The Mersen NH4A2GTR200KVA is a heavy-duty DIN NH size 4a2 gTr fuse-link developed specifically for protecting 200 kVA low-voltage distribution transformers. Designed for operation on 400 V AC systems, it provides reliable transformer protection while withstanding the high magnetising inrush currents that occur during transformer energisation.
The specialised gTr operating characteristic is optimised for transformer applications, providing dependable protection against short circuits without nuisance operation during normal transformer energisation. This helps maximise transformer availability while ensuring effective protection of connected equipment.
Manufactured to the DIN NH standard, the NH4A2GTR200KVA features a robust ceramic body, silver-plated blade contacts, live gripping lugs and a centre-mounted blown fuse indicator. Its standard NH4a2 construction allows installation in compatible NH fuse bases and transformer switch-fuse assemblies by qualified electrical professionals.
Key Advantages
- Designed specifically for 200 kVA distribution transformer protection.
- Specialised gTr characteristic optimised for transformer applications.
- 289 A rated current for 400 V AC transformer systems.
- Withstands transformer magnetising inrush currents.
- Centre-mounted indicator allows rapid fuse status identification.
- Compatible with standard DIN NH size 4a2 fuse systems.
Key Features
- Mersen NH gTr transformer protection fuse-link.
- DIN NH size 4a2.
- 200 kVA transformer protection rating.
- 289 A rated current.
- 400 V AC rated voltage.
- gTr transformer protection characteristic.
- Centre-mounted blown fuse indicator.
- Live gripping lugs.
- Ceramic fuse body.
- RoHS compliant construction.
Reliable Protection for Distribution Transformers
Distribution transformers generate significant magnetising currents when energised. The Mersen gTr operating characteristic is engineered specifically for these applications, allowing normal energisation currents to pass while providing dependable interruption of damaging short-circuit faults.
The NH4A2GTR200KVA is designed for installation in compatible NH fuse bases and transformer switch-fuse assemblies. Installation and replacement should only be carried out by suitably qualified electrical professionals using approved NH fuse handling equipment.
Typical Applications
- 200 kVA low-voltage distribution transformers.
- Transformer switch-fuse units.
- Industrial substations.
- Commercial power distribution systems.
- OEM transformer assemblies.
- Industrial switchgear.
- Utility distribution equipment.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 289 A | |
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Manufacturer | Mersen | |
| Series | NH gTr 400 V Transformer Fuse-Links | |
| Model | NH4A2GTR200KVA | |
| Manufacturer Part Number | D1030518 | |
| Product type | NH transformer protection fuse-link | |
| Fuse utilisation category | gTr | |
| Fuse size | NH4a2 | |
| Transformer rating | 200 kVA | |
| Rated current | 289 A | |
| Rated voltage | 400 V AC | |
| Voltage type | AC | |
| Indicator | Centre indicator | |
| Gripping lugs | Live gripping lugs | |
| Body width | approx. 98 mm | |
| Body material | Ceramic | |
| Compliance | RoHS compliant | |
| EAN | 3605340535518 |
Frequently Asked Questions
What is the Mersen NH4A2GTR200KVA used for?
It is specifically designed to protect 200 kVA low-voltage distribution transformers against short-circuit faults while accommodating transformer energisation currents.
What transformer size is this fuse intended for?
The NH4A2GTR200KVA is designed for transformers with a nominal rating of 200 kVA.
What is the rated current of this fuse-link?
The fuse-link has a rated current of 289 A.
What does the gTr characteristic mean?
The gTr characteristic is specifically optimised for transformer protection, allowing normal magnetising inrush currents while providing dependable fault protection.
Does this fuse include a blown-fuse indicator?
Yes. The NH4A2GTR200KVA features a centre-mounted indicator to provide clear visual confirmation when the fuse has operated.
Trusted Transformer Protection Worldwide
Mersen NH gTr transformer fuse-links are trusted by electrical engineers, panel builders and utility providers for dependable transformer protection, excellent selectivity and reliable performance in low-voltage distribution systems.
