Phase Monitor Relay, Base Shape Octal, Contact Form SPDT, Contact Rating (AC) 10 A @ 277V, Contact Rating (DC) 7 A @ 30V, Current Rating 10 A, Input Voltage 460 to 600V AC, Monitored Parameters Overvoltage, Phase Loss, Phase Reversal, Phase Unbalance, Undervoltage, Number of Pins 8, Restart Auto, Manual, Restart Time Delay 1 to 300 sec, Mounting Style Plug-In, Body Depth 2.9 in, Body Height 2.4 in, Body Width 1.7 in, Electrical Operating Durability 100,000, For Use With Sensors Macromatic's PMP Series Three-Phase Monitor Relay continuously monitors all voltages of a 460-600V three-phase system. It is used to protect motors and equipment from expensive damage due to phase loss, phase reversal, phase unbalance, undervoltage and overvoltage faults, as well as rapid cycling. This product detec.