Eaton Auxiliary Power Switch DH324NRKLLV - NEMA 3R 200A

Three-pole four-wire construction provides direct, clean control of three-phase feeders, reducing mis-wiring and enabling precise de-energization during maintenance. The DH324NRKLLV delivers predictable operating sequences in heavy commercial and industrial buildings, supporting reliable startup and shutdown of motors and equipment. This configuration is particularly valuable in facilities with mixed voltage levels and evolving protection schemes, where a single switch must coordinate with upstream disconnects while maintaining safe neutrals. Integrated cartridge fuse protection offers fast isolation under fault conditions, lowering arc-flash exposure and simplifying compliance with lockout/tagout requirements. The neutral connection ensures correct load balancing and safe fault clearing across four-wire systems, reducing overheating risks on feeders and simplifying protection coordination with downstream devices. In practice, engineers see fewer nuisance trips and quicker fault diagnosis when a single device handles both switching and overcurrent protection for complex loads. An outdoor-ready profile is provided by the NEMA 3R enclosure and painted galvanized steel, which withstands rain, dust, and temperature swings common in industrial environments. This rugged construction supports long service life with minimal maintenance, even in exposed installations. The enclosure's robust dimensions also simplify mounting and retrofits in existing switchgear rooms. With neutral, enhanced visible blade, and clearly marked line/load labels, the DH324NRKLLV improves safety during servicing and commissioning. The visible blade reduces guesswork when verifying circuit status, while line/load labels guide electricians through correct connection points. Together, these features speed installations, inspections, and preventive maintenance without compromising reliability. Wire-size compatibility of #6 AWG to 250 kcmil Cu/Al accommodates large feeders, reducing the need for awkward splices or bootleg connections. The 30 in depth, 18 in width, and 9.5 in height footprint, combined with a 52 lb weight, provide a predictable mounting envelope for new builds and retrofits. The device is designed for 200 A service with 240 V nominal (600 V max). Warranty coverage aligns with Eaton policy (one year from installation or eighteen months from shipment), reinforcing procurement confidence. UL Listing confirms compliance with relevant electrical safety standards, and the heavy-duty designation reflects suitability for demanding applications in industrial plants. Overall, the DH324NRKLLV delivers measurable improvements in uptime, safety, and maintenance efficiency.