ABB RED670 Handbuch Seite 78

Abschnitt 4
IED Anwendung
66 kV
3
66 kV
3
110 V
3
66 kV
3
110 V
3
IEC06000599 V1 DE
Abb. 34: Three phase-to-earth connected VTs
74
Examples how to connect three phase-to-earth connected VTs to the
IED
Figure 34 gives an example how to connect the three phase-to-earth connected VTs
to the IED. It as well gives overview of required actions by the user in order to
make this measurement available to the built-in protection and control functions
within the IED.
L1
L2
L3
110 V
3
Where:
1) shows how to connect three secondary phase-to-earth voltages to three VT inputs in the IED
2) is TRM module where these three voltage inputs are located. It shall be noted that for the‐
se 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 ra‐
tio of the entered values exactly corresponds to ratio of one individual VT.
66
66
=
110
110
EQUATION1903 V1 DE
Fortsetzung auf nächster Seite
IED 670
2
13
1
AI07 (I)
14
15
AI08 (U)
16
17
AI09 (U)
18
19
AI10 (U)
20
21
AI11 (U)
22
23
AI12 (U)
24
3
3
1MRK 505 186-UDE B
3
#3Ph-E VTs
#UL1
#UL2
#UL3
#Not used
#1
4
Applikationshandbuch
5
en06000599.vsd
(Gleichung 13)