Dual power automatic transfer switch NLQ4125/4P 4pole Key benefits Ensures reliable automatic transfer between two power sources to minimize manual intervention and reduce downtime. Available in three current ratings 100A, 80A, and 63A to match a variety of distribution needs. Designed for systems with a 3C rated voltage range above 440V, offering compatibility with highervoltage threephase installations. Improves conversion response for faster and more consistent switching between utility power and backup sources. Main functions and performance Automatic transfer and of supply between primary and secondary power sources according to preset conditions. Clear current rating options let you choose the appropriate switch for load capacity and protective coordination. 4pole configuration supports full threephase switching plus neutral, maintaining system balance and safety during transfer. Intended to reduce interruption time during transfers and to maintain continuity for connected loads. Compatibility and applications Compatible with threephase electrical distribution systems that require automatic switching at voltages above 440V. Suitable for use with backup generators, secondary utility feeds, or alternative power sources where automatic source selection is required. Select the correct current rating 100A, 80A, or 63A to align with panel and feeder capacities. Practical use scenarios Commercial building backup: Automatically switch from utility supply to generator power during outages to keep lighting and essential services operational. Industrial equipment protection: Transfer power between utility and onsite generation to prevent process interruptions for motors and production lines. Facility maintenance and testing: Isolate and switch between two supplies to perform maintenance or to test backup systems without extended downtime. Selection guidance Choose NLQ4125/4P with the current rating that matches the connected load and upstream protective devices. Confirm the installation voltage meets the 3C rated voltage range above 440V and that the 4pole configuration fits the distribution layout. Installation and reliability notes Designed for integration into electrical distribution panels and switchgear assemblies requiring automatic source changeover. Intended for professional installation and correct coordination with upstream protection and system grounding. Model and specifications Model NLQ4125/4P Poles 4 Current ratings available 100A, 80A, 63A Rated voltage range 3C above 440V This automatic transfer switch provides a straightforward solution for automatic power source conversion in highervoltage threephase systems, offering selectable current ratings and full 4pole switching to meet a range of operational requirements.