ABB Relion REC670, Applications Manual

Page: 82 / 658

A
IA
IB
IC
B C
Protected Object
IED
C
T
8
0
0
/1
in
D
e
lta
D
C
A
C
o
n
ne
ct
ed
IC-IB
IB-IA
IA-IC
2
3
4
ANSI11000028-2-en.vsd
SMAI_20
ANSI11000028 V2 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
prim
=800A
CT
sec
=1A
• 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 .
4.2.2.7 Example how to connect single-phase CT to the IED
SEMOD55055-431 v8
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.
Section 4
1MRK 511 401-UUS A
Analog inputs
76 Bay control REC670 2.2 ANSI
Application manual