LINETRAXX® VMD420

  • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V
  • Various monitoring functions selectable < U, > U, < f, > f
  • Asymmetry, phase failure and phase sequence monitoring
  • Adjustable start-up delay, response delay and delay on release

The multi-functional voltage relays of the VMD420 series are designed to monitor the frequency, undervoltage and overvoltage and the voltage between two threshold values (window discriminator function) in 3(N)AC systems. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display. The measured value leading to the activation of the alarm relays will be stored. Due to adjustable response times, installation-specific characteristics, such as device-specific start-up procedures, short-time voltage fluctuations, etc. can be considered . Device version VMD420 requires an external supply voltage.
 

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LINETRAXX® VMD420
LINETRAXX® VMD420
  • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V
  • Various monitoring functions selectable < U, > U, < f, > f
  • Asymmetry, phase failure and phase sequence monitoring
  • Adjustable start-up delay, response delay and delay on release

The multi-functional voltage relays of the VMD420 series are designed to monitor the frequency, undervoltage and overvoltage and the voltage between two threshold values (window discriminator function) in 3(N)AC systems. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display. The measured value leading to the activation of the alarm relays will be stored. Due to adjustable response times, installation-specific characteristics, such as device-specific start-up procedures, short-time voltage fluctuations, etc. can be considered . Device version VMD420 requires an external supply voltage.
 

Domande? Contattaci!

Caratteristiche

  • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V
  • Asymmetry, phase failure and phase sequence monitoring
  • Different monitoring functions selectable < U, > U, < f, > f
  • Start-up delay, response delay, delay on release
  • Adjustable switching hysteresis
  • r.m.s. value measurement (AC)
  • Digital measured value display via multi-functional LC display
  • Preset function (automatic assignment of basic parameters)
  • LEDs: Power On, Alarm 1, Alarm 2
  • Measured value memory for operating value
  • Continuous self monitoring
  • Internal test/reset button
  • Two separate alarm relays (one changeover contact each)
  • N/C or N/O operation and fault memory behaviour selectable
  • Password protection for device setting
  • Sealable transparent cover
  • Two-module enclosure (36 mm)
  • Indication of the system frequency
  • RoHS-compliant

Applicazioni

  • Monitoring of voltage-sensitive machines and electrical installations
  • Switching on and switching off at a certain voltage level
  • Monitoring of stand-by and emergency supply systems
  • Supply voltage monitoring of portable loads
  • Protection of three-phase motors against phase failure and
  • Transformer protection, asymmetrical load can be recognized

LINETRAXX® VMD420 Variante/i

TypeSupply voltage US*Nominal system voltage Un*Art. No.**
VMD420-D-1AC 16…72 V / DC 9,6…94 V, 15…460 Hz3(N)AC 0…500 V / 288 V 15…460 HzB73010005
B93010005
VMD420-D-2AC/DC 70…300 V, 15…460 Hz3(N)AC 0…500 V / 288 V, 15…460 HzB73010006
B93010006

* absolute values
**(B7… = push-wire terminal / B9… = screw-type terminal)

Accessori opzionali per LINETRAXX® VMD420

TypeArt. No.
Mounting clip for screw mounting (one piece per device)B98060008
Mounting frame XM420B990994 

Download per LINETRAXX® VMD420

NomeTipoDimensioneLinguaTimestampD-/B-Numero
UKCA - VMx42x Dichiarazioni di conformità 141.7 KB 2022/12/2020.12.2022
TÜV NORD - isoHV42x, AGH42x, isoHV52x, isoRW42x and VMx420 Certificatos 411.7 KB EN2023/01/1212.01.2023
TÜV NORD - isoHV42x, AGH42x, isoHV52x, isoRW42x und VMx420 Certificatos 431.9 KB DE2023/01/1212.01.2023
VMx42x Dichiarazioni di conformità CE 93.7 KB 2022/11/0404.11.2022
VMD420 Manuali di istruzioni 5.7 MB DE2022/06/0909.06.2022D00137
VMD420 Manuali di istruzioni 5.7 MB EN2022/06/0909.06.2022D00137
VMD420 Manuali di istruzioni 844.6 KB ES2019/05/1313.05.2019D00137
VMD420 Data sheet 374.0 KB DE2022/06/0909.06.2022D00137
VMD420 Data sheet 372.2 KB EN2022/08/1010.08.2022D00137
VMD420 Data sheet 375.7 KB ES2022/06/0909.06.2022D00137
VMD420 Data sheet 540.4 KB ZH2019/05/1313.05.2019D00137
XM420-Schnittstellenoptionen Data sheet 264.1 KB DE2019/05/1313.05.2019
XM420 interface options Data sheet 223.5 KB EN2019/05/1313.05.2019D00051
VMD420 Quickstarts 964.6 KB DE2024/05/2323.05.2024D00137
VMD420 Quickstarts 964.6 KB EN2024/05/2323.05.2024D00137
Changed variants of relays from goldplated to silver-plated contacts Technical information 166.3 KB EN2022/06/2727.06.2022
Geänderte Relaisvarianten von vergoldeten Kontakten auf versilberte Kontakte Technical information 166.3 KB DE2022/06/2727.06.2022