RS PRO's three-phase monitoring relay helps protect your equipment from failure due to undervoltage. The relay uses microprocessor technology to measure phase-to-phase voltages, breaking the circuit connection when the voltage drops too low.
The relay is easily adjustable according to your specifications. You can adjust the minimum voltage requirement up to 280 V and add a time delay to prevent tripping due to momentary dips in voltage.

• SPDT (Single Pole Double Throw) contact configuration
• Dimensions of 66.5 (length) x 17.5 (width) x 89 mm (height)
• Three phases
• Frequency sensing range of 48 to 63 Hz
• Operating temperature range of -20°C to +60°C
• Maximum voltage sensed of 280 V
• Phase and voltage monitoring application
• DIN rail mounting type
• One pole
• Special features include two LEDs for the indication of operational states, detection of incorrect phase sequence and phase loss, fixed time delay, fixed undervoltage trip level, measurement of phase-to-phase voltages, microprocessor-based relay, monitoring of own supply to detect an undervoltage condition on one or more phases, true RMS (Rotronic Monitoring System) monitoring
• Meets CE, EMC (electromagnetic compatibility), EN 61000-6, IEC standards
• Supply voltage of 280 to 520 V AC
• Screw terminal type
• Time delay of 100 ms