This here LV848174 is a rear bottom connection accessory built for the MasterPact line. It mates to a 4-pole breaker in a fixed drawout chassis, with horizontal rear connection contacts spaced at 115 mm pitch. Out here in the grease, this is the piece that brings your rear-access buswork into the breaker. The downside position on the breaker means you're connecting from below the mounting base, horizontal plane. That 115 mm pitch keeps the three phase bars (plus neutral) lined up with the standard MasterPact bus risers.
Installation and connection notes
The fixed drawout frame already aligns the stab assembly—you just secure the rear plate and run your cables or bus. Positioned on the downside of the breaker, accessible from the rear, horizontal orientation—this matches the standard panel cutout for MasterPact switchgear.