McGraw-Edison FA3B1 NX High Voltage Load Break Switch

The McGraw-Edison FA3B1 NX is a high-voltage load-break switch rated for 200 A and up to 15.5 kV, engineered to interrupt and reclose circuits in electrical infrastructure with precise control, reliable mechanical operation, and compatibility with standard HV switchgear configurations. With a 200 A current rating, the device handles substantial switching loads while the 15.5 kV maximum voltage specification governs the insulation requirements, clearance distances, and enclosure sizing essential for safe installation in distribution networks. The FA3B1 NX integrates a max arc-strangler mechanism to aid arc extinction during interruption, supporting safer switching operations. As part of McGraw-Edison’s line of high-voltage load-break switches, the FA3B1 NX is intended for controlled isolation and maintenance in power systems, with the model designation facilitating accurate identification, replacement, and compatibility checks within the manufacturer’s product family.