MR ECOTAP VPD CONTROL PRO Operating Instructions Manual page 104

8.9.2.7 Setting desired load stress type
8.9.2.8 Setting master/follower current blocking
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104 ECOTAP VPD CONTROL PRO
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.
To set the desired power factor, proceed as follows:
1. Go to Settings > Parameters > Parallel operation > Desired power fac-
tor.
2. Enter the desired power factor.
3. Press the Accept button to save the modified parameter.
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 69: Calculation of phase angle difference
φ Phase angle difference between voltage and current
UI
φ Phase angle of voltage
U
φ Phase angle of current
I
Depending on the calculated phase angle difference, you have to select the
following option:
▪ φ > 0: Inductive
UI
▪ φ < 0: Capacitive
UI
To set the desired load stress type, proceed as follows:
1. Go to Settings > Parameters > Parallel operation > Desired load
stress type.
2. Select the desired load stress type.
3. Press the Accept button to save the modified parameter.
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-
mization, and provides you with the safety function of circulating reactive
current blocking. The Circulating reactive current blocking parameter is used
to set the limit value.
5252433/02 EN
8 Operation
Maschinenfabrik Reinhausen GmbH 2018