9 Visualization
Maschinenfabrik Reinhausen GmbH 2020
309
6385142/08 EN
ETOS
®
ED
▪ A diverter switch action was not detected. For on-load tap-changers with
tap-change supervisory control, there was no change in the tap-change
supervisory control contacts and the event
Tap-change operation without
diverter switch operation
is triggered. For tap-changers without tap-
change supervisory control, the diverter switch action is determined using
the torque curve. If the diverter switch action could not be correctly deter-
mined, then the tap-change operation cannot be evaluated.
▪ For multi-column applications: Synchronization error.
The torque is also checked for the maximum permitted motor torque (M
d,max
)
in cases where a diverter switch action was not detected.
9.32.6 Displaying torque monitoring
You can display the torque curve for each tap-change operation. An over-
view screen displays the following information for each tap-change opera-
tion:
▪ Tap-change operation type
▪ Switching direction (from position to position)
▪ Ambient temperature
▪ Time of the tap-change operation
▪ Event message
– Blue: Evaluated tap-change operation without exceeded limit value
– Yellow: Evaluated tap-change operation with exceeded limit value >
– Red: Evaluated tap-change operation with exceeded limit value >>
– Gray: Unevaluated tap-change operation
