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

Section 4
Analog inputs
A B
Protected Object
ANSI11000028 V4 EN-US
Figure 16: 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 Ph-Ph are expected to be A-B, B-C
respectively C-A we need to tilt 180º by setting ToObject.
4.2.2.7

Example how to connect single-phase CT to the IED

Figure 17
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.
54
C
I_A-I_C
I_B-I_A
I_C-I_B
gives an example how to connect the single-phase CT to the IED. It gives an overview of the
For correct terminal designations, see the connection diagrams valid for the delivered IED.
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IED
2
1
3
1MRK511407-UUS Rev. N
4
SMAI2
BLOCK AI3P
REVROT AI1
^GRP2_A AI2
^GRP2_B AI3
^GRP2_C AI4
^GRP2_N AIN
ANSI11000028-4-en.vsdx
Phasor measurement unit RES670
Application manual
SEMOD55055-431 v9