Field Parameters
EVT sec
Secondary nominal
voltage of the e-n winding
of the voltage
transformers, which is
only taken into account in
the direct measurement
of the residual voltage
(EVT
con=measured/broken
delta).
35.00 - 400.00V
100V
[Field Para]
EVT con
Method how the residual
voltage is to be detected.
Calculation is only
possible, if the device is
connected to phase-to-
earth voltages.
Calculated: that means
that the residual voltage
is calculated from the
geometrical sum of the
phase-to-neutral
voltages. WARNING! For
V-connections no
calculation of the residual
voltage is possible.
Measured: The e-n-
windings are connected
to the measuring inputs
for the residual voltage
(broken delta). The
primary and secondary
rated data (EVT pri and
EVT sec) of the voltage
transformers have to be
taken into account.
Calculation of the
residual voltage is only
possible if: VT con =
Phase to Earth
measured,
calculated
measured
[Field Para]
V Block f
Threshold for the release
of the frequency stages
0.15 - 1.00Vn
0.5Vn
[Field Para]
Page 210
EN MRU4 10/09
