Example How To Connect Single-Phase Ct To The Ied - ABB Relion 670 Series Applications Manual

Section 4
Analog inputs
Another alternative is to have the delta connected CT set as shown in figure 29:
A B
Protected Object
ANSI11000028 V2 EN-US
Figure 29: 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
• CTWyePoint =ToObject
ConnectionType = Ph-Ph
•
It is important to notice the references in SMAI. As inputs at
Crespectively C-A we need to tilt 180º by setting
4.2.2.7

Example how to connect single-phase CT to the IED

Figure 30
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.
80
C
IA-IC
IB-IA
IC-IB
gives an example how to connect the single-phase CT to the IED. It gives an overview of
For correct terminal designations, see the connection diagrams valid for the
delivered IED.
IED
2
3
Ph-Ph are expected to be A-B, B-
ToObject .
1MRK 511 358-UUS A
4
SMAI_20
ANSI11000028-2-en.vsd
SEMOD55055-431 v7
Application manual