Square D PowerPact LGL34400WU54X L-Frame 3P 400A Mission Critical UM
600A Frame | 400A | 3P | 65kA@240V, 35kA@480V, 18kA@600V | Electronic Mission Critical (MicroLogic 6.3E LSIG)
Square D's PowerPact LGL34400WU54X L-Frame circuit breaker provides 400A 3-pole circuit protection engineered for commercial and industrial electrical distribution systems. Featuring high interrupting capacity rated at 65kA@240V, 35kA@480V, 18kA@600V and operating at 480Y/277V AC, this breaker delivers proven and reliable overcurrent protection performance. The LGL34400WU54X features a MicroLogic 6.3E LSIG electronic trip unit providing adjustable long-time delay, short-time delay, instantaneous, and ground fault protection settings for precise overcurrent coordination. This advanced electronic trip technology enables optimized protection curves, selective coordination with upstream and downstream protective devices, and significantly enhanced system reliability. Configured for unit mount installation, the LGL34400WU54X utilizes lug (unit mount) connections with AL400L61K3/AL600LS52K3 terminations designed for reliable conductor termination. The unit accommodates (2) 2/0-500 kcmil Al/Cu conductors within compact overall dimensions of 10.24" H x 5.51" W x 5.67" D weighing ~25 lbs, optimizing installation density in electrical distribution equipment. Certified to UL 489, CSA, and IEC/EN 60947-2 international standards, the LGL34400WU54X ensures compliance across diverse global markets and jurisdictions. This breaker serves commercial and industrial power distribution, feeder protection, motor circuit applications, and switchgear installations requiring dependable L-Frame frame interrupting performance. As part of the proven PowerPact family, the LGL34400WU54X delivers dependable protection backed by Schneider Electric's extensive global engineering heritage and comprehensive industry-leading technical support resources.
Key Features
This PowerPact MCCB features Electronic Mission Critical (MicroLogic 6.3E LSIG) trip protection rated 400A at 480Y/277V AC. Frame size: 600A. Interrupting capacity: 65kA@240V, 35kA@480V, 18kA@600V. Designed for reliable overcurrent protection in industrial and commercial power distribution systems.
Applications
Suitable for main distribution panels, motor control centers, switchboards, and feeder circuit protection in industrial facilities, data centers, and commercial buildings. Compliant with UL 489, CSA C22.2 No.5, IEC/EN 60947-2, NOM, CCC, CE.
