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

1MRK 511 401-UEN A
L1 L2
Protected Object
IEC11000028 V3 EN-US
Figure 17: Delta DAC connected three-phase CT set
4.2.2.7
Bay control REC670 2.2 IEC
Application manual
L3
IL1-IL3
IL2-IL1
IL3-IL2
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 Ph-Ph are expected to
be L1L2, L2L3 respectively L3L1 we need to tilt 180º by setting ToObject.

Example how to connect single-phase CT to the IED

Figure 18 gives an example how to connect the single-phase CT to the IED. It
gives an overview 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.
IED
2
1
3
Section 4
Analog inputs
4
SMAI2
BLOCK AI3P
REVROT AI1
^GRP2L1 AI2
^GRP2L2 AI3
^GRP2L3 AI4
^GRP2N AIN
IEC11000028-3-en.vsdx
SEMOD55055-431 v8
75