The 3-phase multifunction control relay RM22R monitor sequence of phases, phase loss, overvoltage and undervoltage events. It features a sealable cover to help protect the settings, a diagnostic button for load circuit testing, a relay output status LED, a fault detection indication LED,a dial pointer LED indicator for relay power ON status, and a relay output On-delay or Off-delay. The most common applications are control for connection of moving equipment (site equipment, agricultural equipment, refrigerated trucks); control against reverse motor operation (lifting, handling, elevators, escalators, etc.); control of sensitive 3-phase supplies; emergency power supply switching in abnormal conditions.
