ABB ret650 - Page 355

Table 238: Binary signals contained in word “enableBlockSignals”: ATCCOUT / YLTCIN
Signal Description
CircCurrBl Alarm/Block tap changer operation because of high circulating current
CmdErrBl Alarm/Block tap changer operation because of command error
OCBl Alarm/Block tap changer operation because of over current
MFPosDiffBl Alarm/Block tap changer operation because the tap difference between a
follower and the master is greater than the set value
OVPartBl Alarm/Block raise commands because the busbar voltage is above Umax
RevActPartBl Alarm/Block raise commands because reverse action is activated
TapChgBl Alarm/Block tap changer operation because of tap changer error
TapPosBl Alarm/Block commands in one direction because the tap changer has reached
an end position, or Alarm/Block tap changer operation because of tap changer
error
UVBl
Alarm/Block tap changer operation because the busbar voltage is below Ublock
UVPartBl Alarm/Block lower commands because the busbar voltage is between Umin
and Ublock
Table 239: Analog signal: ATCCOUT / YLTCIN
Signal Description
currAver Value of current in the phase with the highest current value
In case of parallel control of transformers, the data set sent from output signal
ATCCOUT to other TR8ATCC blocks input HORIZx contains one "word"
containing 10 binary signals and 6 analog signals:
Table 240: Binary signals contained in word “status”: ATCCOUT / HORIZx
Signal
Description
TimerOn This signal is activated by the transformer that has started its timer and is going
to tap when the set time has expired.
automaticCTRL Activated when the transformer is set in automatic control
mutualBlock Activated when the automatic control is blocked
disc Activated when the transformer is disconnected from the busbar
receiveStat Signal used for the horizontal communication
TermIsForcedMaster Activated when the transformer is selected Master in the master-follower
parallel control mode
TermIsMaster Activated for the transformer that is master in the master-follower parallel
control mode
termReadyForMSF Activated when the transformer is ready for master-follower parallel control
mode
raiseVoltageOut Order from the master to the followers to tap up
lowerVoltageOut Order from the master to the followers to tap down
1MRK 504 135-UEN A Section 12
Control
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Technical manual