Schneider Electric PBQ3640G Fusible Ground Bus Plug

Schneider Electric’s Square D PBQ3640G is a fusible I-Line busway plug-in unit rated for 400 A and up to 600 V AC, designed for three-pole, three-wire I-Line busway installations. This plug-in bus plug provides three fuse bases plus an integrated ground path, with ground lugs included for a complete grounding connection and a plug-in connection to adjacent busway sections. It accepts Class H, K, or R fuses, and an R-fuse rejection kit (QMB4060R) is available; Class J fuses can also be used by relocating the load-side fuse bases to the markings inside the enclosure. The PBQ3640G is intended for industrial feeder applications, delivering a robust, easily replaceable fusible interface between busway segments in heavy-duty environments. It supports aluminum or copper I-Line busways and is typically paired with compatible busway sections to form a code-compliant 400 A distribution point in manufacturing, processing, and other high-demand facilities.