RS PRO Phase Monitoring Relays
RS PRO is proud to present a complete range of phase monitoring relays designed for 3 phase systems. Each monitor relay is packed with excellent features to ensure effective protection against all types of low voltage faults. These compact high-quality monitoring devices offer over-voltage and under-voltage protection, protect against voltage phase sequence, phase loss, and phase asymmetry.
Key Features
Phase Failure Relays
Compatible with 3 or 4 wire application
Switchable by a dip switch
Selectable supply voltage
Adjustable under and over voltage set points
Selectable ON/OFF time delays
LED Indication
Compact housing
Compact width: 17.5 mm
Multi-Voltage: Three Phase 3 Wire @ 208-480
VAC or Three Phase 4 Wire @ 120-277 VAC
Can be configured for 3 Phase 3 Wire or 3 Phase 4 Wire system
Protection against Phase loss, Phase Sequence, Phase Asymmetry, Under Voltage & Over Voltage
Selectable Under Voltage / Over Voltage, Asymmetry and Phase Sequence
LED Indication for all Faults & for change in dip switch settings during runtime for better security Adjustable ON/OFF Time Delay in seconds minutes
1 C/O Configuration
Connection for supply voltage and relay is illustrated on the side of the device.
208-480 VAC, UV/OV, Phase Loss, Phase Sequence, Phase Asymmetry Monitoring, 1 C/O = RS stock no:
223-7791
415 VAC (3P, 3W) / 240 VAC (3P, 4W), UV/OV, Phase Loss, Selectable Phase Sequence, Phase Asymmetry, 1C/O = RS stock no:
223-7792
415 VAC (3P, 3W) / 240 VAC (3P, 4W), UV/OV, Selectable Phase Sequence & Phase Asymmetry, ON Delay and OFF Delay (in sec/min), 1C/O = RS stock no:
223-7794
415 VAC (3P, 3W), Phase loss Monitoring, 1 C/O = RS stock no:
223-7795
Switchgear
Control Gear
Machine Control
Mains Distribution Systems