Multi-functional voltage relay for 3(N)AC systems, frequency/overvoltage/undervoltage, phase, phase failure, asymmetry

Device features • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems • Without external supply voltage • Integrated energy backup • Asymmetry, phase failure and phase sequence monitoring • Various monitoring functions selectable <U, >U, <f, >f • Start-up delay, response delay, delay on release • Adjustable switching hysteresis • r.m.s. value measurement (AC+DC) • Digital measured value display via multi-functional LC display • Preset function (automatic setting of basic parameters) • LEDs: Power On, Alarm 1, Alarm 2 • Measured value memory for operating value • Continuous self...

Relay for overvoltage and undervoltage and frequency monitoring LINETRAXX® VMD421H Wiring diagram Operating elements 12 3 1 - Power On LED "ON" (green), lights when the supply voltage is applied or flashes in the event of system fault alarm 2 - Alarm LED "AL1" (yellow), lights when the set response value >U/<f/>f >f/Asy/PHS is exceeded and flashes in the event of system fault alarm 3 - Alarm LED "AL2" (yellow), lights when value falls below the set response value >U/<f/>f >f/Asy/PHS and flashes in the event of system fault alarm Arrow up button: To change the measured value display, move upwards...

Undervoltage, overvoltage and frequency monitoring relay LINETRAXX® VMD421H Timing diagram voltage monitoring t toff - Delay on release Timing diagram phase failure, phase sequence, asymmetry t toff - Delay

Undervoltage, overvoltage and frequency relay LINETRAXX® VMD421H Technical data Displays, memory Rated insulation voltage 400 V Rated impulse voltage/pollution degree 4 kV/3 Display LC display, multifunctional, not illuminated Display range measured value AC/DC 0.500 V Operating uncertainty, voltage at 50/60 Hz ±1.5 %, ±2 digits Operating uncertainty voltage in the range of 15.460 Hz ±3 %, ±2 digits Operating uncertainty, frequency in the range of 15.460 Hz ±0.2 %, ±1 digit History memory (HiS) for the first alarm value data record measured values Fault memory (M) alarm relay on/off/con (on)*...

Ordering information Nominal system voltage 11Un 3(N)AC Device version with screw terminals on request. 11 Absolute values Open the front plate cover in Screw mounting Note: The upper mounting clip must be ordered separately (see ordering information). E& BENDER The Power in Electrical Safety6 P.O. Box 1161 • 35301 Gruenberg • Germany Londorfer Strasse 65 • 35305 Gruenberg • Germany Tel.: +49 6401 807-0 • Fax: +49 6401 807-259 E-Mail: [email protected] • www.bender.de