In case of a solid earth fault in high impedance earthed or unearthed systems the primary
value of Uo voltage will be equal to:
EQUATION1931 V2 EN-US (Equation 11)
Figure 24 gives an overview of required actions by the user in order to make this measurement
available to the built-in protection and control functions within the IED as well.
L1 L2 L3
IED
6.6
3
100
kV
V
R
Uo
IEC06000603-4-en.vsdx
# Not Used
# Not Used
# Not Used
Protected Object
SMAI2
BLOCK
REVROT
^GRP2L1
^GRP2L2
^GRP2L3
^GRP2N
AI3P
AI1
AI2
AI3
AI4
AIN
1
2
3
4
5
IEC06000603 V4 EN-US
Figure 24: Neutral point connected VT
1MRK 511 358-UEN A Section 4
Analog inputs
75
Application manual
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