RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail, Реле контроля

RS PRO Phase, Voltage Monitoring Relay With SPDT Contacts, 3 Phase, Undervoltage

With this RS PRO three-phase monitoring relay, you can protect your equipment from failure due to undervoltage. This relay is equipped with a microprocessor technology that detects and measures phase-to-phase voltages. When the voltage drops too low, it will break the connection in the circuit.


Adjusting the relay to suit your specifications is quick and easy. The minimum voltage requirement can be changed to up to 500 V and a time delay can be added to ensure that any momentary reductions in voltage won't result in tripping.

Features and Benefits

• SPDT (single pole double throw) contact configuration


• Dimensions of 17.5 (width) x 66.5 (length) x 89 mm (height)


• Three phases


• Frequency sensing range of 48 to 63 Hz


• Operating temperature range of -20°C to +60°C


• Voltage sensing range of 300 to 500 (undervoltage) V


• Phase and voltage monitoring application


• DIN rail mounting type


• One pole


• Phase failure and phase sequence sensitivity


• Special features include two LEDs for the indication of operational states, adjustment for time delay, adjustment for undervoltage trip level, detection of incorrect phase sequence and phase loss, 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 0.2 to 10 s


• Undervoltage voltage sensitivity

UL Certification

RS PRO Datasheet