Time Mark Corporation A258B-480VAC 3-Phase Monitor

The Time Mark A258B-480VAC 3-Phase Monitor continuously supervises 480 VAC three-phase power for phase loss, phase reversal, and undervoltage, de-energizing its output relay when faults are detected to protect motors and other critical electrical equipment. Designed for industrial motor controls and process automation, it accepts a nominal 480 VAC phase-to-phase supply with a voltage adjustment range of 380–480 VAC, operates at 60 Hz, draws 3.7 W, and uses SPDT contacts rated 10 A at 240 VAC resistive; it features automatic reset and mounts in an 8-pin socket with an ABS plastic enclosure for rugged panel installations. Commonly installed in motor control panels, HVAC systems, compressors, pumps, conveyors, and other manufacturing equipment to prevent damage from abnormal three-phase power, it carries UL Recognized and CSA Certified qualifications and operates from -20°F to +131°F (-29°C to +55°C).