MR tapcon 230 pro - Page 90

7 Functions and settings
Maschinenfabrik Reinhausen 201490 3550953/00 ENTAPCON® 230 pro
To use Z compensation, you need to calculate the increase in voltage (ΔU)
taking the current into account. Use the following formula for this purpose:
∆U Voltage increase I Load current in A
U
Tr
Transformer voltage with
current I
I
N
Nominal current of current
transformer connection in A
(1 A; 5 A )
U
Load
Voltage on line end with
current I and on-load tap-
changer in same operating
position
k
CT
Current transformer ratio
Sample calculation: U
Tr
= 100.1 V, U
Load
= 100.0 V, I
N
= 5 A k
CT
= 200 A/5 A,
I = 100 A
Produces a voltage increase ∆U of 0.2%
The following sections describe how you can set the parameters you need
for Z compensation.
Select Z compensation
To select the line drop compensation, proceed as follows:
► > Control parameter > Compensation method.
ð Compensation method.
ð Press or until the Z option is displayed.
1. Press .
2. The Z compensation is selected.
The following sections describe how you can set the required parameters for
Z compensation.
Setting Z compensation
This parameter sets the voltage increase ∆V previously calculated.
If you do not want to use Z compensation, you have to set the value 0.0 %.
To set the current dependent voltage increase, proceed as follows:
7.6.2.1