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MERSEN FUSE NH4A 500KVA 400V GTR MI NH4A2GTR500KVA
Mersen NH4A2GTR500KVA DIN NH4a gTr transformer protection fuse-link rated at 722 A and 400 V AC for 500 kVA transformers with centre indicator and live gripping lugs.
£113.03
Why Choose the Mersen NH4A2GTR500KVA Transformer Fuse-Link?
The Mersen NH4A2GTR500KVA is a heavy-duty DIN NH gTr transformer protection fuse-link developed to provide reliable overload and short-circuit protection for low voltage distribution transformers. Manufactured by Mersen, this NH4a fuse-link is specifically engineered with characteristics matched to transformer applications, allowing it to withstand transformer energisation currents whilst delivering rapid fault protection.
Part of the proven Mersen NH gTr 400 V AC fuse-link series, the NH4A2GTR500KVA is designed for transformers with a nominal capacity of 500 kVA. It features a 722 A rated current, 400 V AC operating voltage, a centre indicator and live gripping lugs, making it ideal for industrial power distribution systems, substations and transformer installations.
Its NH4a construction provides excellent fault interruption capability and dependable long-term performance. The wider 98 mm body is designed for high-current transformer protection applications requiring reliable operation under demanding electrical conditions.
Key Advantages
- Purpose-designed gTr fuse-link for transformer protection.
- Suitable for 500 kVA low voltage transformers.
- 722 A rated current for high-power transformer applications.
- 400 V AC operating voltage.
- Centre indicator enables rapid identification of an operated fuse.
- Live gripping lugs support safe replacement using an approved NH fuse puller.
- 100 kA breaking capacity for demanding industrial fault conditions.
- Manufactured in accordance with IEC NH fuse standards.
Key Features
- Mersen NH gTr transformer protection fuse-link series.
- Catalogue number: NH4A2GTR500KVA.
- Mersen item number: H1030522.
- Fuse size: NH4a.
- Transformer capacity: 500 kVA.
- Rated current: 722 A.
- Rated voltage: 400 V AC.
- Utilisation category: gTr.
- Centre operated-fuse indicator.
- Live gripping lugs.
- Blade contact construction.
- Body width: 98 mm.
Reliable Protection for Distribution Transformers
The Mersen NH4A2GTR500KVA is specifically designed for transformer protection. Its gTr operating characteristic accommodates transformer magnetising inrush currents whilst providing dependable protection against overloads and high prospective short-circuit currents, helping maximise transformer reliability and service life.
The fuse-link should be installed in a compatible NH4a fuse base and handled only by qualified electrical personnel using an approved NH fuse replacement device together with appropriate personal protective equipment.
Typical Applications
- 500 kVA low voltage distribution transformers.
- Industrial transformer switchboards.
- Commercial power distribution systems.
- Electrical substations.
- Industrial switchboards.
- Manufacturing and process facilities.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 722 A | |
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH4a | |
| Fuse Class | gTr | |
| Manufacturer | Mersen | |
| Series | NH Fuse-Links gTr 400 VAC | |
| Model | NH4A2GTR500KVA | |
| Item number | H1030522 | |
| Product type | DIN NH transformer protection fuse-link | |
| Fuse size | NH4a | |
| Utilisation category | gTr | |
| Transformer nominal capacity | 500 kVA | |
| Rated current | 722 A | |
| Rated voltage | 400 V AC | |
| Rated breaking capacity | 100 kA AC | |
| Current type | AC | |
| Indicator | Centre indicator | |
| Gripping lugs | Live tags | |
| Body width | 98 mm | |
| EAN | 3605340535556 | |
| Compliance | RoHS compliant | |
| HS Code | 85361090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen NH4A2GTR500KVA used for?
The NH4A2GTR500KVA is designed to protect 500 kVA low voltage distribution transformers against overload and short-circuit faults.
What transformer size is this fuse designed for?
This fuse-link is designed for transformers with a nominal rating of 500 kVA.
What is the rated current?
The NH4A2GTR500KVA has a rated current of 722 A.
What does the gTr classification mean?
The gTr utilisation category identifies fuse-links specifically developed for transformer protection, providing operating characteristics suited to transformer inrush currents whilst protecting against overloads and short circuits.
Does this fuse include an indicator?
Yes. The NH4A2GTR500KVA incorporates a centre indicator that provides clear visual identification when the fuse-link has operated.
Trusted by Electrical Professionals Worldwide
Mersen NH gTr transformer fuse-links are trusted by transformer manufacturers, panel builders, utilities and industrial maintenance engineers for dependable protection of low voltage distribution transformers.
