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

Section 4
Analog inputs
A B
Protected Object
ANSI11000028 V2 EN-US
Figure 17: Delta DAC connected three-phase CT set
4.2.2.7
76
C
IA-IC
IB-IA
IC-IB
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
• CTWyePoint=ToObject
• ConnectionType=Ph-Ph
It is important to notice the references in SMAI. As inputs at Ph-Ph are expected to be
A-B, B-Crespectively C-A 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
3
1MRK 511 401-UUS A
4
SMAI_20
ANSI11000028-2-en.vsd
SEMOD55055-431 v8
Bay control REC670 2.2 ANSI
Application manual