BENDER VMD422-D-2

The BENDER VMD422-D-2 is a voltage and frequency monitoring relay designed to ensure the safety and reliable operation of electrical systems. It's part of the VMD422 series, which is known for its comprehensive monitoring capabilities in 3(N)AC systems.

Product Details

The VMD422-D-2 is specifically engineered to continuously monitor the voltage and frequency at the point of feed-in in 3AC/3NAC systems. It detects deviations from set thresholds and activates alarm relays to indicate faults.

Key features include:

• Comprehensive Monitoring: Undervoltage, overvoltage, underfrequency, overfrequency, asymmetry, phase failure, and phase sequence monitoring.

• True RMS Measurement: Provides accurate readings for various waveform types.

• Two Separate Alarm Relays: Each with a changeover contact, allowing for flexible control and signaling.

• Fault Memory: The alarm relays can remain in an alarm state until manually reset, even after the fault clears. This feature can be deactivated if not needed.

• Adjustable Delays: Offers adjustable start-up delay, response delay, and delay on release, providing flexibility for different application requirements.

• Digital Display & LEDs: Features an LC display for continuous measurement value indication and LEDs (Power On, Alarm 1, Alarm 2) for quick status checks.

• Self-Monitoring: Continuous self-monitoring ensures the device's reliable operation.

• Security: Password protection for device settings and a sealable transparent cover to prevent unauthorized access.

• Compact Design: Two-module enclosure (36 mm) for space-saving installation.

• Push-Wire Terminals: Enables quick, safe, and stable wiring connections.

• RoHS Compliant: Meets environmental standards.

Product Parameters

• Part Number: B73010011

• Nominal System Voltage (Un): 3(N)AC 0...500 V / 288 V, 40-65 Hz

• Supply Voltage (Us): AC/DC 70...300 V, 15-460 Hz

• Power Consumption: $\le 3.5\text{ VA}$

• Response Time (voltage/frequency): $\le 180\text{ ms}$

• Start-up Delay (t): 0...300 s (default 30 s)

• Delay on Release (toff): 0...300 s (default 30 s)

• Measuring Range (Undervoltage/Overvoltage): Configurable (e.g., undervoltage: 320/184 V, overvoltage: 460/264 V)

• Measuring Range (Underfrequency/Overfrequency): Configurable (e.g., underfrequency: 47.5 Hz, overfrequency: 50.2 Hz)

• Asymmetry Monitoring: 5...30 %

• Relay Contacts: 2 changeover contacts, gold-plated

• Enclosure: 2-module (36 mm)

• Terminals: Push-wire terminals (two terminals per connection)

• Protection: Quick-blow fuse 6 A (for supply voltage)

• Compliance: Preset according to DIN V VDE V 0126-1-1