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Examples:
This function enables the RVT to control a MV capacitor bank. A proper voltage
transformer shall be connected to the measurements terminals of RVT. Then the RVT will
display the MV measurement values accordingly.
Q step 1ph: the smallest step size for single phase (phase to neutral) capacitors which
are used for individual phase power factor correction in an unbalanced network.
Q step 3ph: the smallest step size for three phase capacitors in a balanced network.
For the above two settings,
a) After automatic commissioning, this value will be set according to the smallest step
in the capacitor bank.
b) For guided commissioning (see 4.2.2.2), this value need to be set manually.
Here is an example in a capacitor bank which has both individual phase (3 steps) and
three-phase (3 steps) power factor correction:
Single phase sequence*: 1 (5kvar) 2 (10kvar) 2 (10kvar) è Q step 1ph = 5 kvar
Three phase sequence: 1 (10kvar) 2 (20kvar) 2 (20kvar) è Q step 3ph = 10 kvar
Or,
Three phase sequence: 2 (15kvar) 4 (30kvar) 5 (37.5kvar) è Q step = 7.5 kvar
*Sequence: relative reactive power value of the capacitors connected to the RVT outputs.
These relative values are included between 0 and 8.
For both Base Model RVT6/RVT12 and Three Phase Model RVT12-3P, the default factory
sequence is: 1:1:....:1. Customized sequence may be introduced manually.
To customize a sequence, navigate in the menu tree as following:
Start screen â Settings â Manual settings â Bank settings â Outputs.
Figure 28
shows the output 1 - 6, click the arrow button
display the remaining output 7-12 as shown in
36 Measurements and Settings ç Power Factor Controller RVT
for a 15kV/100V voltage transformer, V scaling = 150.
if no external voltage transformer is used, V scaling = 1.
Figure 29.
, the next screen will
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