Littelfuse® PLM9405 SSAC® PLM 3-Phase Electromechanical Voltage Monitoring Relay, 480 VAC, 8 Pins, SPDT/(1-Form C) Contact Configuration

The PLM series is a 3-phase voltage monitor that continuously monitors each of the three phases. Monitors both delta and wye systems and no connection to neutral is required. The microcontroller circuit design protects against undervoltage, voltage unbalance, phase loss and phase reversal. Protection is assured when regenerated voltages are present.