ABB Relion 670 Series Applications Manual page 90

Section 4
Analog inputs
66 kV
3
110 V
3
66 kV
3
110 V
3
ANSI06000599 V2 EN-US
Figure 32: A Three phase-to-ground connected VT
Where:
1)
2)
Table continues on next page
84
A
B
C
66 kV
3
110 V
3
shows how to connect three secondary phase-to-ground 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
13
1
AI 07 (I)
14
15
AI 08 (V)
16
17
AI 09 (V)
18
19
AI 10 (V)
20
21
AI 11 (V)
22
23
AI 12 (V)
24
1MRK 511 358-UUS A
5
SMAI2
BLOCK AI3P
^GRP2_A AI1
^GRP2_B AI2
^GRP2_C
AI3
^GRP2N AI4
#Not used
TYPE
AIN
4
ANSI06000599-2-en.vsd
(Equation 2)
Application manual