Bender LINETRAXX VMD421H-D-3 Voltage Monitoring Relay

The Bender LINETRAXX VMD421H-D-3 is a multi-functional voltage relay
designed for monitoring 3-phase systems. It provides protection against
undervoltage, overvoltage, frequency variations, and phase faults,
making it ideal for industrial power systems and renewable energy applications.

Monitoring Functions

• System Type: AC / DC / 3-Phase
• Voltage Range: 0 – 500V
• Frequency Range: 15 – 460 Hz
• Monitoring: Under/Over Voltage
• Frequency: Under/Over Frequency
• Protection: Phase failure & sequence

Electrical Specifications

• Supply Voltage: 70 – 300V AC/DC
• Response Delay: 0 – 300s (adjustable)
• Release Delay: 0 – 300s
• Hysteresis: Adjustable

Output & Interface

• Contacts: 2 x SPDT
• Voltage Rating: 250V AC / 300V DC
• Current Rating: 5A
• Display: Digital LCD

Mechanical & Environment

• Mounting: DIN Rail
• Size: 36 x 90 x 71 mm
• Weight: ~150 g
• Protection: IP30 / IP40
• Housing: Polycarbonate