ABB Relion 650 Series Applications Manual page 52

Section 4
Analog inputs
66 kV
3
66 kV
3
110 V
3
66 kV
3
110 V
3
ANSI11000031 V3 EN-US
Figure 15: A Three phase-to-ground connected VT
Where:
1)
2)
Table continues on next page
46
A
B
C
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
© Copyright 2013 ABB. All rights reserved
IED
2
3
1
1MRK 505 287-UUS B
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 3)
Busbar protection REB650
Application manual