BENDER LINETRAXX VMD420-D-2 Voltage Monitoring Relay

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• • • • BENDER LINETRAXX VMD420-D-2 Three-Phase Voltage and Frequency Monitoring Relay

        Product Overview

        The BENDER LINETRAXX VMD420-D-2 is a multifunctional three-phase voltage and frequency monitoring relay designed for industrial electrical systems. It monitors overvoltage, undervoltage, frequency deviations, phase failure, phase sequence, and voltage asymmetry. The device features an LCD display, two independent alarm relays, and adjustable response delays.

         

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        Technical Specifications

        Parameter	Details
        Manufacturer	BENDER
        Model	VMD420-D-2
        Product Series	LINETRAXX
        Product Type	Voltage and Frequency Monitoring Relay
        Rated System Voltage	3(N)AC 0–500 V
        Line-to-Neutral Range	0–288 VAC
        Auxiliary Supply	70–300 VAC/DC
        Frequency Range	15–460 Hz
        Monitoring Functions	Overvoltage, undervoltage, overfrequency, underfrequency
        Phase Monitoring	Phase failure, phase sequence, asymmetry
        Alarm Outputs	2 changeover relay contacts
        Power Consumption	≤ 4 VA
        Display	Multifunction LCD
        Mounting	DIN Rail
        Housing Width	36 mm
        Protection Rating	IP30 (housing), IP20 (terminals)
        Weight	Approx. 150 g

         

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        Key Features

        • Monitors three-phase AC voltage and frequency.

        • Detects overvoltage and undervoltage conditions.

        • Monitors phase failure and phase sequence.

        • Detects voltage asymmetry.

        • Two independently configurable alarm relays.

        • Adjustable switching thresholds and response delays.

        • LCD display with measured-value indication.

        • Integrated test and reset functions.

        • Continuous self-monitoring.

        Applications

        • Industrial three-phase power systems

        • Motor and transformer protection

        • Standby and emergency power supply monitoring

        • Electrical distribution panels

        • Voltage-sensitive industrial machinery

        • Industrial automation systems

        Important Notes

         

        • The D-2 version requires an auxiliary supply of 70–300 VAC/DC.

        • The monitored system voltage is up to 500 VAC; this is separate from the auxiliary supply voltage.

        • This model uses screw-type terminals. The B73010006 version uses push-in terminals.

        • Confirm the monitoring configuration and alarm settings before installation.

        • The VMD420 series is identified as discontinued in Bender's product documentation.

The structure and details of the product：

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