Industrial C263 Phase Monitor Relay Panel Mount

The Time Mark C263 3-Phase Power Monitor is a panel- or surface-mount, solid-state device that continuously monitors 480 VAC three-phase power systems for phase loss, phase reversal, and undervoltage, de-energizing its SPDT output relay when faults are detected to protect motors and industrial equipment. Commonly used in motor control panels, HVAC systems, pumps, compressors, conveyors, and manufacturing machinery, it supports Wye and Delta configurations without requiring a neutral connection and offers automatic reset for quick recovery. Key specifications include nominal 480 VAC (phase-to-phase), adjustable voltage range 380–480 VAC, 60 Hz operation, SPDT contacts rated 10 A at 240 VAC resistive, 50 ms response time, ±0.1% repeat accuracy, and roughly 2% dead band; power consumption 4.5 W; 2500 VRMS transient protection for 10 ms; enclosure made of ABS plastic; mounting: panel/surface; operating temperature -20°F to +131°F (-29°C to +55°C); certifications UL Recognized and CSA Certified. Common replacements include Time Mark C263M, C269, and C265 for maintenance and upgrades.