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Sat Dec 16 06:03:38 2017
Sat Dec 16 06:03:38 2017


  • Voltage monitoring up to 1200 V
  • All functions are represented in ANSI codes
  • 3-stage voltage and frequency monitoring with a corresponding response delay
  • Can be used optionally for a wide variety of system configurations such as AC, 3AC, 3NAC and DC

The multifunctional voltage monitoring relay VMD461 monitors frequencies, undervoltages and overvoltages in DC, AC and 3(N)AC systems. The phase voltages and/or line-to-line voltages are measured as r.m.s. value and are continuously shown on the device display.

The measured value required to trigger the alarm relay is stored. The VMD461 features additional measuring functions for:

  • ROCOF df/dt
  • Vector shift monitoring
  • Unbalance monitoring
  • Phase sequence monitoring

The corresponding ANSI codes for all available measuring functions are provided. Configurable delay times allow considering special installation-specific properties (e.g. device-specific start-up procedures). The VMD461 requires an external supply voltage.

The optional use of a CD440 coupling device extends the voltage range that can be monitored to DC/3AC 1200 V or 1AC/3NAC 690 V.

  • Features
  • Applications
  • Accessories
  • Ordering information
  • Downloads
  • When combined with a CD440 coupling device, DC systems up to 1200 V, 1AC systems up to 690 V, 3AC systems up to 1200 V and 3NAC systems up to 690 V can be monitored
  • All functions are represented in ANSI codes
  • Monitoring of DC, 1AC, 3(N)AC systems DIN EN 60255-1:2010-9
  • Three-stage voltage and frequency monitoring
  • Unbalance, phase failure and phase sequence monitoring
  • Monitoring of the connected switches and/or disconnectors (configurable: NC/NO/off)
  • Islanding detection df/dt (ROCOF)
  • Vector shift function
  • RS-485 interface (data exchange/parameter setting/software update)
  • Test function to determine the switch-off time
  • Test button for the trigger circuit
  • The last 300 network faults can be recalled with time stamp/real-time clock
  • Continuous monitoring of the phase voltage and line-to-line voltage
  • Special switch-on conditions after an infringement of a response value
  • Language selection (German, English, French)
  • Backlit graphic LC display
  • Password protection for device setting
  • Remote shutdown via ripple control signal receiver
  • Sealable enclosure
  • Monitoring of voltage-sensitive machines and installations
  • Switching installations on and off at a certain voltage level
  • Protection of three-phase motors against phase failure and phase open-circuit
  • Vector shift detection for protection of electrical machines
  • Islanding detection ROCOF (rate of change of frequency)
  • Transformer protection by recognising asymmetrical load


Mandatory accessories for LINETRAXX® VMD461

Coupling device for nominal voltage DC 1200 V / 1AC 690 V / 3AC 1200 V / 3NAC 690 V
TypeArt. No.

Optional accessories for LINETRAXX® VMD461

Condition Monitor
TypeDevice variantsArt. No.
COM465IPwith an integrated gateway: Bender system/Ethernet
AC/DC 24…240 V, DC, 50…60 Hz
COM465IP-24 Vwith an integrated gateway: Bender system/Ethernet
DC 24 V
COM465IP function module AIndividual texts for devices/channels, device failure monitoring, e-mail in the event of an alarmB75061011
COM465IP function module BModbus TCP server for max. 98 * 139 BMS nodes as well as BCOM devices and universal measuring devices, SNMP serverB75061012
COM465IP function module CParameter setting for BMS devices as well as BCOM and universal measuring devicesB75061013
COM465IP function module DVisualisation of Bender systems, system visualisationB75061014
COM465IP function module EVirtual devicesB75061015
COM465IP function module FIntegrating third-party devicesB75061016
CP700for the connection of Bender BMS devices and universal measuring devices to TCP/IP systemsnB95061030

RS-485 repeater
TypeSupply voltage UsArt. No.
DI-1DC 10…30 VB95012015
DI-1PSMAC/DC 24 V ± 20 %B95012044

Power supply unit for DI-1
TypeSupply voltage UsArt. No.
AN471AC 230 V, 50…60 Hz / AC/DC 20 VB924189

Variants of LINETRAXX® VMD461

TypeSupply voltage UsArt. No.
VMD461-D-2AC/DC 100…240 VB93010047

Downloads for LINETRAXX® VMD461



Category Product Language Date Size Download