ABB Relion 670 Series Applications Manual page 418

Section 15
Control
Setting
CmdErrBk
(manually reset)
TapChgBk
(manually reset
Table continues on next page
412
Values (Range) Description
Alarm Typical operating time for a tap changer mechanism is
Auto Block around 3-8 seconds. Therefore, the function should
Auto&Man Block wait for a position change before a new command is
issued. The command error signal, CMDERRAL on the
TCMYLTC or TCLYLTC function block, will be set if the
tap changer position does not change one step in the
correct direction within the time given by the setting
tTCTimeout in TCMYLTC or TCLYLTC function block.
The tap changer module TCMYLTC or TCLYLTC will
then indicate the error until a successful command
has been carried out or it has been reset by changing
control mode of TR1ATCCor TR8ATCC function to
Manual and then back to Automatic. The outputs
CMDERRAL on TCMYLTC or TCLYLTC and TOTBLK or
AUTOBLK on TR1ATCCor TR8ATCC will be activated
depending on the actual parameter setting.
This error condition can be reset by the input
RESETERR on TCMYLTC function block, or
alternatively by changing control mode of TR1ATCCor
TR8ATCC function to Manual and then back to
Automatic.
Alarm If the input TCINPROG of TCMYLTC or TCLYLTC
Auto Block function block is connected to the tap changer
Auto&Man Block mechanism, then this blocking condition will be active
if the TCINPROG input has not reset when the
tTCTimeout timer has timed out. The output TCERRAL
will be activated depending on the actual parameter
setting. In correct operation the TCINPROG shall
appear during the URAISE/ULOWER output pulse and
disappear before the
This error condition can be reset by the input
RESETERR on TCMYLTC function block, or
alternatively by changing control mode of TR1ATCCor
TR8ATCC function to Manual and then back to
Automatic.
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1MRK 511 401-UEN Rev. K
tTCTimeout time has elapsed.
Bay control REC670
Application manual