Example How To Connect Single-Phase Ct To The Ied - ABB Relion REC670 Applications Manual

Section 4
Analog inputs
Another alternative is to have the delta connected CT set as shown in figure 17:
L1 L2
Protected Object
IEC11000028 V3 EN-US
Figure 17: Delta DAC connected three-phase CT set
In this case, everything is done in a similar way as in the above described example, except that
for all used current inputs on the TRM the following setting parameters shall be entered:
CT
=800A
prim
CT
=1A
sec
CTStarPoint =ToObject
•
ConnectionType = Ph-Ph
•
It is important to notice the references in SMAI. As inputs at
L2L3 respectively L3L1 we need to tilt 180º by setting
4.2.2.7

Example how to connect single-phase CT to the IED

Figure 18
of the required actions by the user in order to make this measurement available to the built-in
protection and control functions within the IED as well.
64
L3
IL1-IL3
IL2-IL1
IL3-IL2
gives an example how to connect the single-phase CT to the IED. It gives an overview
For correct terminal designations, see the connection diagrams valid for the
delivered IED.
IED
2
1
3
ToObject .
1MRK 511 358-UEN A
4
SMAI2
BLOCK AI3P
REVROT AI1
^GRP2L1 AI2
^GRP2L2 AI3
^GRP2L3 AI4
^GRP2N AIN
IEC11000028-3-en.vsdx
Ph-Ph are expected to be L1L2,
Application manual
SEMOD55055-431 v7