ABB RET670 Applications Manual page 694

Section 3
IED application
688
means that different time delays can be used in the different followers in order to avoid
simultaneous tapping if this is wanted. It shall be observed that it is not applicable in
the follow command mode.
OperationAdapt: This setting enables or disables adapt mode for parallel control with
the circulating current method or the master-follower method.
MFMode: Selection of Follow Command or Follow Tap in the master-follower mode.
CircCurrBk: Selection of action to be taken in case the circulating current exceeds
CircCurrLimit.
CmdErrBk: Selection of action to be taken in case the feedback from the tap changer
has resulted in command error.
OCBk: Selection of action to be taken in case any of the three phase currents on the HV-
side has exceeded Iblock.
MFPosDiffBk: Selection of action to be taken in case the tap difference between a
follower and the master is greater than MFPosDiffLim.
OVPartBk: Selection of action to be taken in case the busbar voltage V
RevActPartBk: Selection of action to be taken in case Reverse Action has been activated.
TapChgBk: Selection of action to be taken in case a Tap Changer Error has been identified.
TapPosBk: Selection of action to be taken in case of Tap Position Error, or if the tap
changer has reached an end position.
UVBk: Selection of action to be taken in case the busbar voltage V
UVPartBk: Selection of action to be taken in case the busbar voltage V
UVblock and Vmin.
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 Enabled/Disabled.
I1Base: Base current in primary Ampere for the HV-side of the transformer.
I2Base: Base current in primary Ampere for the LV-side of the transformer.
VBase: Base voltage in primary kV for the LV-side of the transformer.
1MRK504116-UUS C
exceeds Vmax.
B
falls below Vblock.
B
is between
B
Application manual