ABB REL650 Applications Manual page 108

Section 4
Analog inputs
66 kV
3
66 kV
3
110 V
3
66 kV
3
110 V
3
ANSI11000031 V3 EN
Figure 43: A Three phase-to-ground connected VT
102
A
B
C
110 V
3
Where:
1) shows how to connect three secondary phase-to-ground voltages to three VT inputs on the IED
2) is the TRM where these three voltage inputs are located. For these three voltage inputs, the
following setting values shall be entered:
VTprim = 66 kV
VTsec = 110 V
Inside the IED, only the ratio of these two parameters is used. It shall be noted that the ratio of
the entered values exactly corresponds to ratio of one individual VT.
66
=
110
110
EQUATION1903 V1 EN
Table continues on next page
IED
2
3
1
66
3
3
1MRK 506 334-UUS A
4
SMAI_20_2
BLOCK AI3P
REVROT AI1
^GRP2_A AI2
^GRP2_B AI3
^GRP2_C AI4
^GRP2_N AIN
ANSI11000031-3-en.vsd
(Equation 34)
Application manual