The Eaton 77PCG4 is a phase-monitoring relay that provides protection, monitoring and control of electrical installations. It features phase-sequence, phase-imbalance, phase-loss and over-under voltage protection. In addition, the relay offers adjustable time delays, adjustable thresholds and adjustable operating thresholds. It also provides real-time reporting, visible LED indicators, and optional remote alarms. The 77PCG4 is a modular, 19-inch rack mountable device and is designed to be used in commercial and industrial applications. The 77PCG4 is a robust and reliable unit, providing complete phase monitoring protection for commercial and industrial applications.