ABB Relion REC670 - Page 320

Communication between these TR8ATCCs is made either on the GOOSE interbay
communication on the IEC 61850 protocol if TR8ATCC functions reside in different IEDs, or
alternatively configured internally in one IED if multiple instances of TR8ATCC reside in the
same IED. Complete exchange of TR8ATCC data, analog as well as binary, on GOOSE is made
cyclically every 300 ms.
TR8ATCC function block has an output ATCCOUT. This output contains two sets of signals.
One is the data set that needs to be transmitted to other TR8ATCC blocks in the same parallel
group, and the other is the data set that is transferred to the TCMYLTC or TCLYLTC function
block for the same transformer as TR8ATCC block belongs to.
There are 10 binary signals and 6 analog signals in the data set that is transmitted from one
TR8ATCC block to the other TR8ATCC blocks in the same parallel group:
Table 30: Binary signals
Signal Explanation
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
TermIsForcedMast
er
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
Table 31: Analog signals
Signal Explanation
voltageBusbar Measured busbar voltage for this transformer
ownLoadCurrim Measured load current imaginary part for this transformer
ownLoadCurrre Measured load current real part for this transformer
reacSec Transformer reactance in primary ohms referred to the LV side
relativePosition The transformer's actual tap position
voltage Setpoint The transformer's set voltage ( USet ) for automatic control
Section 13 1MRK 511 358-UEN A
Control
314
Application manual