Bender VME420 - 3 Function; Device Features

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VME420_D00026_03_M_XXDE/04.2019
3. Function
3.1 Device features
 Undervoltage and overvoltage monitoring of AC/DC systems 0…300 V
in the frequency range DC/15…460 Hz
 Preset function: Automatic response value setting for undervoltage
and overvoltage, < U and > U as well as for underfrequency and over-
frequency < f and > f.
 Voltage and frequency monitoring with window discriminator func-
tion, < U and > U as well as < f and > f.
 Indication of the system frequency f
 Start-up delay, response delay and delay on release
 Adjustable switching hysteresis for U and f
 r.m.s. value measurement AC + DC
 Measured value display via multi-functional LC display
 Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
 N/C operation or N/O operation selectable
 Password protection against unauthorised parameter changing
 Fault memory can be deactivated. In the
"con“ mode, all alarm parameters remain stored on failure of the supply
voltage.
 Start-up of the device with or without simulated alarm message
 Frequency alarm behaviour in case of measuring voltage failure can be
parameterised