ABB RET670 - Page 58

19
20
21
22
23
24
13
14
15
16
17
18
A
AI 07 (I)
AI 08 (V)
AI 09 (V)
AI 10 (V)
AI 11 (V)
AI 12 (V)
IED
B
C
66
3
110
3
kV
V
1
3
2
66
3
110
3
kV
V
66
3
110
3
kV
V
#Not used
5
ANSI06000599-2-en.vsd
SMAI2
BLOCK
^GRP2_A
TYPE
AI3P
AI1
AI2
AI3
AI4
AIN
^GRP2_B
^GRP2_C
^GRP2N
4
ANSI06000599 V2 EN
Figure 15: A Three phase-to-ground connected VT
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
66
3
110
110
3
=
EQUATION1903 V1 EN (Equation 17)
Table continues on next page
Section 3 1MRK504116-UUS C
IED application
52
Application manual