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.
