[dwstabke-170712-01.tif, 1, en_US]
Figure 6-266 Stabilized Characteristic Curve
Processing a Ground Side for Auto Transformer
Instead of a 1-phase neutral point, with an auto transformer, a 3-phase ground side can also be used.
[dwautraf-201112-01.tif, 1, en_US]
Figure 6-267
Connecting a Ground Side on the Auto Transformer
In this case, the neutral-point current calculates as sum of the phase currents of the ground side:
I
0
* = k
m
· 3I
0
' → 3I
0
' = I
gnd,A
+ I
gnd,B
+ I
gnd, C
with k
m
= I
N,transformer
/I
N,side
Protection and Automation Functions
6.43 Restricted Ground-Fault Protection
SIPROTEC 5, Overcurrent Protection, Manual 865
C53000-G5040-C017-8, Edition 07.2017
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