The NH system is classified among plug-in fuse systems and is
composed of:
- fuse-base (possibly including terminal covers and phase barriers)
- fuse-link with blade contact
- fuse-link replacement device (LV HRC fuse puller)
Since the design of this system cannot guarantee
non-interchangeability of rated current it must be handled by a
qualified professional.
Type “gG” NH fuse-links are full range breaking capacity fuse-links
and are used to protect cables and equipment. They can interrupt
any current surge, from the lowest fusing current up to their breaking
capacity, and so can be used alone as protection. They also protect
electrical devices and industrial set-ups from the electrodynamic
effects of very high short-circuit currents.