The DPB01CM48 is a Phase Monitoring Relay with SPDT contact and PA66 or NORYL housing. This DPB01-series DIN rail mount phase monitoring relay features as 3-phase or 3-phase + neutral line voltage monitoring relay for phase sequence, phase loss, over and under-voltage (separately adjustable set points) with built-in time delay function. Detect when all 3 phases are present and have the correct phase sequence Upper and lower limits separately adjustable Measure their own power supply Selection of measuring range by DIP-switches Adjustable voltage on relative scale Adjustable delay function 22.5mm Euronorm housing LED indication for relay, alarm and power supply ON Applications Industrial