ABB RET670 Applications Manual page 54

Section 3
IED application
A B
Protected Object
ANSI11000028 V2 EN
Figure 12: Delta DAC connected three-phase CT set
48
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 13 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
1MRK504116-UUS C
4
SMAI_20
ANSI11000028-2-en.vsd
Application manual