ABB RET670 Applications Manual page 58

Section 3
IED application
66 kV
3
110 V
3
66 kV
3
110 V
3
ANSI06000599 V2 EN
Figure 15: A Three phase-to-ground connected VT
52
A
B
C
66 kV
3
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
13
1
14
15
16
17
18
19
20
21
22
23
24
66
3
3
1MRK504116-UUS C
2
3
AI 07 (I)
BLOCK
AI 08 (V)
^GRP2_A
^GRP2_B
AI 09 (V)
^GRP2_C
^GRP2N
#Not used
AI 10 (V)
TYPE
AI 11 (V)
4
AI 12 (V)
Application manual
5
SMAI2
AI3P
AI1
AI2
AI3
AI4
AIN
ANSI06000599-2-en.vsd
(Equation 17)