Example On How To Connect A Star Connected Three-Phase Ct Set To The Ied - ABB RES670 Applications Manual

1MRK 511 407-UEN C
4.2.2.5
Phasor measurement unit RES670 2.2 IEC
Application manual
However, in some cases, the following rated secondary currents are used as well:
• 2A
• 10A
The IED fully supports all of these rated secondary values.
It is recommended to:
• use 1A rated CT input into the IED in order to connect CTs
with 1A and 2A secondary rating
• use 5A rated CT input into the IED in order to connect CTs
with 5A and 10A secondary rating
Example on how to connect a star connected three-phase CT set to
the IED
Figure 12 gives an example about the wiring of a star connected two-phase CT set
to the IED. It gives an overview of the actions which are needed 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.
Section 4
Analog inputs
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