400V millisecond level dual power automatic transfer switch NLQ4125/4P 100A Key benefits Fast automatic switching in millisecond range to minimize interruption and maintain continuous power supply. Dual power automatic transfer function selects between two supply sources without manual intervention, improving system availability and conversion response. Wide voltage compatibility with a 3C rated voltage range greater than 50V and less than 440V, making it suitable for many low and medium voltage systems. Fourpole, 100A rating provides reliable switching for threephase plus neutral systems and common commercial or industrial circuits. Clear, purposedriven design that simplifies integration and reduces installation time. Main functions and performance Automatic transfer: monitors two independent power sources and switches automatically when the primary source fails or falls outside acceptable parameters. Millisecondlevel transfer speed reduces downtime and the risk of process interruption. Dual power control improves conversion rates between sources by executing timely and repeatable transfers within the specified electrical ratings. Fourpole switching supports threephase plus neutral configurations for balanced and unbalanced loads. Compatibility and application notes Rated for systems operating up to nominal 400V within the specified 3C voltage window. Current rating 100A and 4P configuration suit distribution panels, generator interfaces, and backup power schemes. Compatible with common power sources such as utility mains, standby generators, and inverter or UPS outputs when connected within the rated voltage and current limits. Key attributes Model: NLQ4125/4P 100A. Voltage range: 3C rated, greater than 50V and less than 440V. Poles: 4P (threephase plus neutral). Current: 100A rated switching capacity. Function: automatic dual power transfer with millisecondlevel switching performance. Designed for integration into electrical distribution systems that require fast, automatic source changeover. Practical use scenarios Data center power continuity: automatic transfer between utility feed and standby generator to protect critical servers and networking equipment from interruptions. Commercial building emergency power: seamless switching from mains to backup generator to maintain lighting, elevators, and essential services during power events. Industrial process backup: automatic changeover between primary supply and alternative source to minimize production stoppages and protect sensitive machinery. Why choose this model The NLQ4125/4P 100A automatic transfer switch delivers fast, automatic transfers and broad voltage compatibility for a range of commercial and industrial applications. Its fourpole, 100A configuration enables straightforward use in threephase plus neutral systems while maintaining millisecondlevel switching performance to reduce operational disruptions.