Fuse link - NH2C gG 250A/400V - time-lag 004185119

Knife fuse links – reliable protection for installations

Knife fuse links NH are industrial devices designed to protect electrical installations against the effects of short circuits and overloads. Their construction and electrical parameters comply with PN-93/E-06160 (gF), PN-IEC-269 and VDE 0636 standards, which guarantees their reliable operation in demanding conditions. This particular fuse link, designated as NH2C gG 250A/400V, combines a proven design with modern solutions.

Characteristics and application

The NH2C gG 250A/400V fuse link is characterized by a rated current of 250A and a rated voltage of 400V AC. The “gG” designation indicates its versatility – it is suitable for protecting cables against overloads and short circuits. The time-delay characteristic (g) allows for short-term exceeding of the rated current without disconnection, which is particularly important when starting devices with motors or other pulsed loads. This minimizes the risk of unnecessary circuit tripping during normal operation.

Construction and additional functions

The fuse link is made of high-quality materials: a steatite body (thermally stable material), silver-plated brass knife contacts and an aluminum cover – which ensures corrosion resistance and long-term reliability. Filling the body with quartz sand of a special granulation increases the short-circuit breaking capacity to 120kA and stabilizes the electrical parameters. It is equipped with a double tripping indicator – a red eye on the ceramic body and a springy plate on the cover, which facilitates quick identification of a blown fuse. Additionally, the indicator on the top cover enables cooperation with the NVS 5 microswitch for remote tripping signaling, which is particularly useful in automatic control and monitoring systems.

• The body made of steatite provides thermal stability and resistance to mechanical damage.
• Silver-plated knife contacts minimize transition resistance and facilitate assembly.
• Double tripping indicator facilitates quick fault diagnosis.
• Possibility of remote tripping signaling increases safety and installation efficiency.
• Compliance with IEC 60269-1 and IEC 60269-2 standards confirms the high quality and safety of the product.