Fuse link - NH3 gG 425A/690V - time-lag 004186330

NH fuse links – reliable installation protection

NH knife fuse links are a proven safety element in industrial installations. They serve to protect against the effects of short circuits and overloads, ensuring continuity of operation and safety. The NH3 gG 425A/690V fuse link is characterized by high efficiency and complies with applicable standards, such as PN-93/E-06160, PN-IEC-269 and VDE 0636.

Construction and parameters

The construction of the fuse link is based on a body made of steatite – a material with high thermal stability. The knife contacts made of silver-plated brass guarantee good electrical contact and minimize the risk of corrosion. The aluminum covers provide additional protection against external factors. The fuse link has a double indication of operation – a red eye in the central part of the ceramic body and a springy plate on the upper cover, which facilitates quick identification of a blown fuse.

The rated current of this fuse link is 425A at 690V AC, making it suitable for protecting circuits with a high load. The gG characteristic (time-delay) provides resistance to short-term current surges, typical for starting motors and other devices with high power consumption. The rated short-circuit switching capacity is 100kA, which guarantees effective protection of the installation in the event of a short circuit.

Application and installation

NH fuse links are widely used in industry, construction and energy infrastructure. They are ideal for protecting cables, equipment and electrical circuits against overloads and short circuits. Installation is carried out in dedicated fuse holders or fuse disconnectors. Insulated handles are also available, increasing safety during installation and maintenance. It is important to select the correct fuse link for the installation parameters to ensure optimal protection and reliable operation.