counter that is, the total number of operations at rated load that the tap changer is
designed for.
EnabTapCmd: This setting enables/disables the lower and raise commands to the tap
changer. It shall be Enabled for voltage control, and Disabled for tap position feedback
to the transformer differential protection T2WPDIF (87T) or T3WPDIF (87T).
TCMYLTC and TCLYLTC (84) Setting group
General
Operation: Switching the TCMYLTC or TCLYLTC (84) function Enabled/Disabled.
IBase: Base current in primary Ampere for the HV-side of the transformer.
tTCTimeout: This setting gives the maximum time interval for a raise or lower
command to be completed.
tPulseDur: Length of the command pulse (VRAISE/VLOWER) to the tap changer. It
shall be noticed that this pulse has a fixed extension of 4 seconds that adds to the
setting value of tPulseDur.
3.12.4.3 Setting parameters
Table 165: TR1ATCC (90) Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation Disable / Enable
I1Base 1 - 99999 A 1 3000 Base setting for HV current level in A
I2Base 1 - 99999 A 1 3000 Base setting for LV current level in A
VBase 0.05 - 2000.00 kV 0.05 400.00 Base setting for voltage level in kV
MeasMode A
B
C
AB
BC
CA
PosSeq
- - PosSeq Selection of measured voltage and current
TotalBlock Disabled
Enabled
- - Disabled Total block of the voltage control function
AutoBlock Disabled
Enabled
- - Disabled Block of the automatic mode in voltage
control function
FSDMode Disabled
Auto
AutoMan
- - Disabled Fast step down function activation mode
tFSD 1.0 - 100.0 s 0.1 15.0 Time delay for lower command when fast
step down mode is activated
Table continues on next page
Section 3 1MRK504116-UUS C
IED application
698
Application manual
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