Models and ratings NXZM63S/3A 63A NXZM63S/4A 63A NXZM125S/3A 125A NXZM125S/4A 125A NXZM160S/3A 160A NXZM160S/4A 160A NXZM250S/3A 250A NXZM250S/4A 250A NXZM400S/3A 400A NXZM400S/4A 400A NXZM630S/3A 630A NXZM630S/4A 630A NXZM800S/3A 800A NXZM800S/4A 800A Overview This series provides automated transfer and reliable switching for single or dual power sources across a wide current range from 63A to 800A. The product is engineered for continuous power availability, safe operation, and flexible configuration to match a variety of installation needs. Key benefits Continuous power availability: automatic detection and fast, reliable switching between power sources to minimize downtime for critical loads. Safety and protection: combined mechanical and electrical interlocking prevents simultaneous source connection and reduces the risk of short circuits. Multiple built in protection functions safeguard the system during transition and fault conditions. Long service life: stable mechanical design and smooth contact switching reduce wear and extend operational lifetime under frequent switching cycles. Modular and expandable: supports a range of functional modules for control, monitoring, and auxiliary features, enabling easy and future expansion. Primary functions Automatic source monitoring and transfer to maintain uninterrupted supply. Mechanical interlock to prevent concurrent source closing. Electrical interlock and protective logic to respond to faults and abnormal conditions. Modular interface for additional control, signaling, or remote monitoring modules. Compatibility and installation Available in multiple frame sizes and current ratings to match distribution boards, switchgear, and power panels. Designed for integration with generators, utility mains, backup power systems, and control cabinets. Compatible with common electrical system architectures that require an automatic transfer solution and modular expansion. Performance and construction Smooth contact operation for reliable switching under load. Stable mechanical structure to support repeated operations. Configurable control logic and modular inputs and outputs to meet specific site requirements. Typical applications Data centers and server rooms where uninterrupted power is required for critical IT equipment. Industrial and manufacturing plants that need automatic source transfer to avoid process interruptions. Commercial buildings and telecom installations where reliable backup power switching ensures service continuity. What this product solves Eliminates manual switching and the delays associated with human intervention. Reduces the risk of power loss to critical equipment by providing automatic and monitored transfer. Allows tailored functionality through modular components to address unique site needs without replacing the main unit. Ordering note Select the model that matches the required continuous current rating and desired module configuration for control and monitoring.