ABB Relion 670 Series Applications Manual page 397

1MRK 511 401-UUS F
UVPartBk : Selection of action to be taken in case the busbar voltage V
Vmin .
14.5.3.2 TR1ATCC (90) or TR8ATCC (90) Setting group
General
Operation : Switching automatic voltage control for tap changer, TR1ATCC (90) for single control
and TR8ATCC (90) for parallel control function
(IB1) : Base current in primary Ampere for the HV-side of the transformer.
(IB2) : Base current in primary Ampere for the LV-side of the transformer.
(VB) : Base voltage in primary kV for the LV-side of the transformer.
MeasMode : Selection of single phase, or phase-phase, or positive sequence quantity to be used for
voltage and current measurement on the LV-side. The involved phases are also selected. Thus,
single phase as well as phase-phase or three-phase feeding on the LV-side is possible but it is
commonly selected for current and voltage.
Q1 , Q2 and Q3 : Mvar value of a capacitor bank or reactor that is connected between the power
transformer and the CT, such that the current of the capacitor bank (reactor) needs to be
compensated for in the calculation of circulating currents. There are three independent settings
Q1 , Q2 and Q3 in order to make possible switching of three steps in a capacitor bank in one bay.
TotalBlock : When this setting is Enabled the voltage control function, TR1ATCC (90) for single
control and TR8ATCC (90) for parallel control, is totally blocked for manual as well as automatic
control.
AutoBlock : When this setting is Enabled the voltage control function, TR1ATCC (90) for single
control and TR8ATCC (90) for parallel control, is blocked for automatic control.
Operation
FSDMode : This setting enables/disables the fast step down function. Enabling can be for
automatic and manual control, or for only automatic control alternatively.
tFSD : Time delay to be used for the fast step down tapping.
Voltage
UseCmdUSet : This setting enabled makes it possible to set the target voltage level via IEC 61850
set point command. This, in turn, makes the setting
VSet : Setting value for the target voltage, to be set in percent of VBase .
VDeadband : Setting value for one half of the outer deadband, to be set in percent of VBase . The
deadband is symmetrical around
transformer", figure 175. In that figure
to a value near the power transformer's tap changer voltage step (typically 75 - 125% of the tap
changer step).
VDeadbandInner : Setting value for one half of the inner deadband, to be set in percent of VBase .
The inner deadband is symmetrical around
single transformer",figure 175. In that figure
Bay control REC670
Application manual
Enabled / Disabled .
VSet , see section
VDeadband is equal to DV. The setting is normally selected
VSet , see section
VDeadbandInner is equal to DV
© Copyright 2017 ABB. All rights reserved
is between
B
USet redundant.
"Automatic voltage control for a single
"Automatic voltage control for a
Section 14
Control
UVblock and
SEMOD171501-22 v9
. The setting shall be
in
391