LINETRAXX® VME421H

  • Undervoltage, overvoltage and frequency monitoring of AC/DC systems 9.6…150 V (VME421H-D-1), 70…300 V (VME421H-D-2)
  • Integrated energy storage, is supplied by the system being monitored
  • Various monitoring functions selectable U, f
  • Password protection for device setting
  • Preset function (automatic setting of basic parameters)

The voltage relays of the VME421H series are designed to monitor the frequency, undervoltage, overvoltage and the voltage between two threshold values (window discriminator function) in AC and DC 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 VME421H takes the supply voltage from the system being monitored and utilizes an internal energy backup.

Questions? Contact us!

LINETRAXX® VME421H
LINETRAXX® VME421H
  • Undervoltage, overvoltage and frequency monitoring of AC/DC systems 9.6…150 V (VME421H-D-1), 70…300 V (VME421H-D-2)
  • Integrated energy storage, is supplied by the system being monitored
  • Various monitoring functions selectable U, f
  • Password protection for device setting
  • Preset function (automatic setting of basic parameters)

The voltage relays of the VME421H series are designed to monitor the frequency, undervoltage, overvoltage and the voltage between two threshold values (window discriminator function) in AC and DC 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 VME421H takes the supply voltage from the system being monitored and utilizes an internal energy backup.

Questions? Contact us!

Features

  • Undervoltage, overvoltage and frequency monitoring of AC/DC systems, 9.6…150 V (VME421H-D-1), 70…300 V (VME421H-D-2)
  • Without external supply voltage
  • Integrated energy backup
  • 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 + DC)
  • 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/rest 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)
  • Push-wire terminal (two terminals per connection)
  • RoHS-compliant

Applications

  • Voltage and frequency monitoring of single-phase machines and electrical installations
  • Earth fault monitoring in medium-voltage systems via voltage transformers
  • Monitoring of battery systems
  • Switching machinery and equipment on and off at a certain voltage level

LINETRAXX® VME421H Variant(s)

TypeNominal system voltage Un*Response valueArt. No.**
VME421H-D-1DC 9,6…150 V / AC 9,6…150 V, 15…46 HzAC/DC 9,6…150 VB73010003
B93010003
VME421H-D-2DC 70…300 V / AC 70…300 V, 15…460 HzAC/DC 70…300 VB73010004
B93010004

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

Optional Accessories for LINETRAXX® VME421H

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

Downloads for LINETRAXX® VME421H

NameCategorySizeLanguageTimestampD-/B-Number
UKCA - VMx42x Declarations of Conformity 141.7 KB 2022/12/2020.12.2022
VMx42x CE Declarations of conformity 93.7 KB 2022/11/0404.11.2022
VME421H Manuals 2.2 MB DE2019/05/1313.05.2019D00141
VME421H Manuals 2.1 MB EN2019/05/1313.05.2019D00141
VME421H Manuals 452.3 KB ES2019/05/1313.05.2019D00141
VME421H Datasheets 414.9 KB DE2021/12/2323.12.2021D00141
VME421H Datasheets 409.2 KB EN2022/08/1010.08.2022D00141
VME421H Datasheets 394.3 KB ES2021/12/2323.12.2021D00141
VME421H Datasheets 540.1 KB ZH2019/05/1313.05.2019D00141
XM420-Schnittstellenoptionen Datasheets 264.1 KB DE2019/05/1313.05.2019
XM420 interface options Datasheets 223.5 KB EN2019/05/1313.05.2019D00051