Section 4
Analog inputs
4.2.2.5
L1
CT 600/5
Star Connected
Protected Object
IEC13000002 V4 EN-US
Figure 10:
Star connected three-phase CT set with star point towards the protected object
42
It is recommended to:
•
use 1A rated CT input into the IED in order to connect CTs
with 1A and 2A secondary rating
•
use 5A rated CT input into the IED in order to connect CTs
with 5A and 10A secondary rating
Example on how to connect a star connected three-phase CT set to
the IED
Figure
10
gives an example about the wiring of a star connected two-phase CT set
to the IED. It gives an overview of the actions which are needed to make this
measurement available to the built-in protection and control functions within the
IED as well.
For correct terminal designations, see the connection diagrams
valid for the delivered IED.
L2
L3
IL1
IL2
IL3
IN
IED
1
2
3
1MRK 511 423-UEN A
SEMOD55055-352 v11
4
SMAI2
BLOCK
AI3P
REVROT
AI1
5
^GRP2L1
AI2
^GRP2L2
AI3
^GRP2L3
AI4
^GRP2N
AIN
IEC13000002-4-en.vsdx
Bay control REC650 2.2 IEC
Application manual