9 Visualization
Maschinenfabrik Reinhausen GmbH 2020
182
4453918/14 EN
ETOS
®
TD
Inductive resistance load
You can use this parameter to set the inductive resistance load.
Length of line
You can use this parameter to set the length of line.
9.20.2 Z compensation
To keep the voltage constant for the consumer, you can use Z compensation
to activate a current-dependent voltage increase. You can also define a limit
value to avoid excess voltage on the transformer.
ΔU% max
ΔU%
ΔU%
I
Figure 122: Z compensation
To use Z compensation, you need to calculate the voltage increase (ΔU) tak-
ing the current into account. Use the following formula for this purpose:
Δ
U
=
U
Tr
-
U
Load
U
Load
×
I
N
×
k
CT
I
× 100
%
∆U
Voltage increase
I
Load current in A
U
Tr
Transformer voltage at current I I
N
Nominal current of current-trans-
former connection in A
U
Load
Voltage on line end at current I
and on-load tap-changer in
same operating position
k
CT
Current transformer transmission
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%
Summary of Contents for ETOS TD
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