Time Mark Corporation C263 Three-Phase Monitor

The Time Mark C263 3-Phase Monitor provides continuous protection for 380–480 VAC three-phase power systems by detecting phase loss, phase reversal, and undervoltage conditions to guard motors and industrial equipment from electrical faults. It is designed for installation in motor control panels, HVAC systems, pumps, compressors, conveyors, and other manufacturing equipment, with maintenance teams, OEMs, and system integrators using it for replacement, repair, and preventive maintenance. This solid-state monitor supervises Wye or Delta systems without a neutral connection and automatically de-energizes its output relay when faults are detected, with surface/panel mounting, screw terminal connections, adjustable voltage settings, and a 10 A SPDT output relay. Key specifications include a 480 VAC nominal input (phase-to-phase), 380–480 VAC voltage adjustment range, 60 Hz, SPDT output contacts rated 10 A at 240 VAC resistive, and an electromechanical relay with a solid-state sensing circuit, plus repeat accuracy of ±0.1% and a 50 ms response time. It provides 2500 VRMS transient protection, automatic reset (manual reset version available), NORMAL and TRIP LEDs, ABS plastic enclosure, surface/panel mounting, screw terminals, operating temperature −20°F to 131°F (−29°C to 55°C), and UL Recognized and CSA Certified status. Common replacements include Time Mark C263M, C269, and C265 for maintenance and upgrades.