Installation Settings - ABB RVT Serie Instrucciones De Instalación Y De Funcionamiento

The controller
is locked by
software.
Figure 35: RVT bank settings protection: protected

4.3.1.2 Installation settings

Start screen-> Settings-> Manual settings-> installation settings
RVT installation settings give instructions on how to set CT related parameters.
Figure 36: RVT installation settings
CT scaling: current transformer ratio.
Example: a 250A / 5A CT has a CT Scaling of 50.
C/k: starting current of the RVT Controller. It is usually set equal to 2/3 of the current of
the capacitor step (Qstep) (see paragraph 4.3.1.1.)
It represents the threshold current value for the RVT to switch ON or OFF a capacitor
step. The C/k can be programmed from 0.01 to 5.
The following example shows the effect of a too low C/k value and how it can lead to
useless switching:
A too high C/k value will lead to insufficient capacitor steps being switched ON in order
to reach the target cos j.
44 Measurements and Settings ç Power Factor Controller RVT