The Power in Electrical Safety® Undervoltage/overvoltage relay for monitoring three-phase AC systems (window function) for power plant applications

LINETRAXX® VMD258 Undervoltage/overvoltage relay for monitoring three-phase AC systems (window function) for power plant applications Device features • High availability due to purely analogue technology • Undervoltage and overvoltage monitoring for 3AC systems • No separate supply voltage required • Separate alarm relays for undervoltage and overvoltage with two potential-free changeover contacts • Adjustable response value: • Nominal system voltages: • Adjustable response delay: 0.5 s • LEDs for operation, overvoltage, undervoltage Product description The voltage relay VMD258 monitors three-phase...

Undervoltage/overvoltage relay LINETRAXX® VMD258 Operating elements Wiring diagram

Undervoltage/overvoltage relay LINETRAXX® VMD258 Ordering details Additional mounting clips (screw mounting) Energy backup ES258 Dimension diagrams Dimensions in mm 108 Diagram operating times tae As is shown in the diagram below, the operating time (tae) depends on the ratio of the measured voltage (Um) to the switching threshold (Us). Examples for tae: Abhängige Zeitcharakteristik/Dependent time characteristic

Undervoltage/overvoltage relay LINETRAXX® VMD258 Technical data Switching elements Number of switching elements Operating mode Rated impulse voltage (kV) Pollution degree Overvoltage category Voltage ranges Operating range Short-time overload capability Electrical endurance, number of cycles Contact data acc. to IEC 60947-5-1 Rated operational voltage Utilisation category Rated operational current Minimum current 2 x 2 changeover contacts N/C operation (undervoltage) N/O operation (overvoltage) 10000 Power consumption Measuring circuit Nominal system voltage Un Setting range Short-time overload...

BENDER Group VMD258_D00068_03_D_XXEN/04.2023 / © Bender GmbH & Co. KG, Germany – Subject to change! The specified standards take into account the edition valid until 04.2023 unless otherwise indicated. Bender GmbH & Co. KG Londorfer Straße 65 • 35305 Grünberg • Germany Tel.: +49 6401 807-0 • [email protected] • www