User's Manual

Setting up a Measurement
Nominal/Limit Values 5
5-9
difference based on setting. The Minimum rate of change is expressed as % of Vn per
second and indicates the velocity of the voltage change. It is calculated by dividing the
magnitude of the voltage step between two steady states by the unsteady time (this is the
duration from the end of steady state 1 until the begin of steady state 2).
The detection of rapid voltage changes is based on half cycle rms values or full cycle rms
values updated every half cycle (whatever is configured in the D - S - I panel).
rapidvoltagechangessettings.bmp
The parameters are recommended in the IEC 61000-4-30 Ed. 2, items 5.11 and A5.