ABB Relion REC670 Applications Manual page 74

Section 4
Analog inputs
66
66 kV
3
110 V
3
66 kV
3
110 V
3
IEC06000599 V4 EN-US
Figure 20: A Three phase-to-earth connected VT
Where:
1)
2)
Table continues on next page
68
L1
L2
L3
kV
3
110 V
3
shows how to connect three secondary phase-to-earth voltages to three VT inputs on the IED
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
66
3
=
110
110
3
EQUATION1903 V1 EN-US
IED
2
3
1
#Not used
1MRK 511 358-UEN A
5
SMAI2
BLOCK AI3P
REVROT AI1
^GRP2L1 AI2
^GRP2L2 AI3
^GRP2L3 AI4
^GRP2N AIN
4
IEC06000599-4-en.vsdx
(Equation 2)
Application manual
.