Mersen D227979

The NH fuse-link aM is a plug-in fuse system featuring a fuse-base, which may include terminal covers and phase barriers, and a blade contact fuse-link. This system's design necessitates handling by qualified professionals due to the inability to ensure non-interchangeability of rated current. The specific model operates at a rated voltage of 690V AC, with a current capacity of 250A, making it suitable for protecting motor circuits.

These fuse-links are characterized by their partial-range breaking capacity, effectively interrupting currents from 6.3 times the nominal current (In) up to their maximum breaking capacity. As such, they are ideal for short-circuit protection and must be paired with additional switchgear to safeguard against overloads. The NH3 fuse size, combined with a ceramic insulating body and silver-plated copper connection terminals, contributes to its robust performance.

For optimal functionality, the NH fuse-link aM operates with a power dissipation at the rated current of 14.6W. It is essential to ensure compatibility with the motor's nominal current for effective circuit protection.