NLQ4125/3P MillisecondLevel Dual Power Automatic Transfer Switch Overview A threephase automatic transfer switch designed to transfer load between two power sources in millisecondlevel time. Provides dependable, fast switching for critical circuits with selectable rated currents and a wide voltage compatibility range. Key benefits Fast transfer: millisecondlevel switching minimizes interruption to connected loads for improved continuity. Flexible current options: available rated currents of 63 A, 80 A, and 100 A to match a range of load requirements. Wide voltage compatibility: designed for threephase 3C systems with rated voltage range above 50 V and below 440 V. Simplifies backup power: automatically switches to the secondary power source when the primary source fails, reducing downtime and manual intervention. Robust performance: engineered for reliable operation under repeated switching cycles, suitable for industrial and commercial use. Function and performance Function: continuously monitors two power supplies and executes an automatic transfer between them when voltage or frequency falls outside acceptable limits. Switching speed: millisecondlevel response to provide fast restoration of power to critical circuits. Phase support: threephase operation with 3C rating for balanced load switching and stable performance. Current options: configured for 63 A, 80 A, or 100 A rated load capacities to fit common distribution requirements. Compatibility and installation Compatible with utility mains, backup generators, UPS systems, and inverter sources used in threephase installations. Intended for integration into distribution panels, switchgear, and control cabinets where fast automatic transfer is required. Compact, modular design for straightforward mounting and wiring in standard electrical enclosures. Materials and reliability Designed for industrial environments with durable construction and reliable contact mechanisms to support frequent switching. Low maintenance operation with predictable mechanical and electrical behavior when properly installed and operated within rated parameters. Typical applications Commercial buildings and retail facilities: automatic switchover from utility to backup generator to keep essential services running during outages. Industrial plants and manufacturing lines: protect sensitive production equipment by rapidly transferring power to a secondary source to avoid process interruptions. Telecommunications sites and pump stations: maintain continuous threephase power for critical infrastructure and remote equipment. What to consider when selecting Confirm system voltage is between 50 V and 440 V and that the installation is threephase 3C. Choose the rated current option that matches the load requirements: 63 A, 80 A, or 100 A. Ensure appropriate coordination with upstream protection devices and wiring practices for safe, reliable operation. Model reference NLQ4125/3P millisecondlevel dual power automatic transfer switch, available in 63 A, 80 A, and 100 A versions, for threephase 3C systems with rated voltage range above 50 V and below 440 V. Reliable, fast, and suitable for a range of commercial and industrial applications where automatic, millisecondlevel transfer between two power sources is required.