ABB REG670 - Example How to Connect Single-Phase CT to the IED

L1
IL1
IL2 IL3
L2 L3
Protected Object
IED
CT 800/1
in Delta
DAC Connected
IL3-IL2
IL2-IL1
IL1-IL3
2
3
4
IEC11000028-3-en.vsdx
SMAI2
BLOCK
REVROT
^GRP2L1
^GRP2L2
^GRP2L3
^GRP2N
AI3P
AI1
AI2
AI3
AI4
AIN
1
IEC11000028 V3 EN
Figure 22: 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
• CTStarPoint=ToObject
• ConnectionType=Ph-Ph
It is important to notice the references in SMAI. As inputs at Ph-Ph are expected to be
L1L2, L2L3 respectively L3L1 we need to tilt 180º by setting ToObject.
4.2.2.7 Example how to connect single-phase CT to the IED
Figure 23 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.
For correct terminal designations, see the connection diagrams valid
for the delivered IED.
1MRK 502 071-UEN - Section 4
Analog inputs
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 79
Application manual