MR ETOS TD, Руководство по эксплуатации

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9 Visualization
Maschinenfabrik Reinhausen GmbH 2020 190 4453918/14 EN ETOS
®
TD
Circulating reactive current blocking limit
You can use this parameter to set the limit value for the maximum permissi-
ble circulating reactive current. This value relates to the rated current of the
current transformer. If, during parallel operation, the circulating reactive cur-
rent exceeds the set limit value, the device triggers the
Circulating reactive
current blocking limit exceeded event. All devices operating in the parallel
operation group are blocked.
Desired power factor
You can use this parameter to set the power factor, which the transformer
has under normal operating conditions. If the measured power factor devi-
ates from the desired one, the device calculates a correction which is added
to the control deviation.
Enter a desired power factor other than 0. If you enter a desired power fac-
tor of 0, the device is not able to calculate the voltage correction.
Desired load stress type
You can use this parameter to set the load stress type, which the trans-
former has under normal operating conditions.
You can determine the load stress type using the phase angle difference be-
tween voltage and current. You calculate the phase angle difference as fol-
lows:
Figure 128: Calculation of phase angle difference
φ
UI
Phase angle difference between voltage and current
φ
U
Phase angle of voltage
φ
I
Phase angle of current
Depending on the calculated phase angle difference, you have to select the
following option:
▪ φ
UI
> 0: Inductive
▪ φ
UI
< 0: Capacitive
Master/follower current blocking
You can use this parameter to activate the circulating reactive current block-
ing limit for the tap synchronization parallel operation method. The device
thereby calculates and monitors the circulating reactive current in the same
manner as the parallel operation method for circulating reactive current mini-