Woodward MRU3-11D Voltage Relay

FAQ

Q1: What is the primary function of the MRU3-11D voltage relay?
A1: It continuously monitors the supply voltage and triggers a relay output when the voltage exceeds or drops below configured limits, protecting downstream equipment.

Q2: Does this relay support both overvoltage and undervoltage protection?
A2: Yes, it provides independent protection for both conditions and allows individual setting of trip thresholds.

Q3: How accurate is the voltage measurement?
A3: The device maintains a voltage tolerance of ±1% under normal operating conditions.

Q4: Can the relay be reset automatically after a fault clears?
A4: Yes, the reset mode can be configured for either automatic recovery or manual reset depending on system requirements.

Q5: Is the relay suitable for unstable or fluctuating voltage systems?
A5: Yes, its adjustable delay setting prevents nuisance tripping caused by brief voltage dips or surges.

Q6: What type of output does the relay provide for control systems?
A6: It outputs a dry contact relay signal capable of switching up to 5 A at 250 V AC.

Q7: Can it operate without an external auxiliary power supply?
A7: Yes, the relay is powered directly from the monitored voltage circuit.

Q8: How is the setting configuration performed?
A8: Voltage thresholds and delay times are set using front-panel adjustment knobs or internal switches depending on the unit version.

MRU3-11D Voltage Relay Woodward

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