NSN 6110-01-347-9421

A panel which is specifically designed to provide one or more kinds of protection for any or all equipment used in an electrical system. Protection provided may be such as differential current protection, reverse phase sequence connection protection, over-excitation protection, under-speed protection, over-voltage protection, fault protection, under-voltage protection, surge protection, etc. May control the generator(s) operation. Incorporates into a single item the system protection formerly placed at various points in the electrical system. For panels designed for the protection of power line feeders only, see panel, power distribution and panel, fuse. For items designed to transfer the load from one power source to an alternate power source, see switching unit, power transfer.