The phase current preprocessing function ILTCTR is used for setting up the three phase current measurement channels. The input channels for ILTCTR are from physical hardware. The output I3P channel of ILTCTR can be connected to different applications which require 3 phase current and positive- and negative sequence current. The output IRES_CLC can be connected to functions using the calculated residual current.
The CT's primary rated current can be set using Primary current setting. The setting Secondary current defines the nominal current of the CT's secondary winding. This is used as a reference to scale the measurements accordingly. These settings also affect the scaling of the calculated residual current.
Current magnitude correction of an external CT can be made using settings Amplitude Corr A, Amplitude Corr B and Amplitude Corr C.
Current angle correction of an external CT can be made using settings Angle Corr A, Angle Corr B and Angle Corr C.
Reverse polarity setting is used to reverse the polarity of phase CTs.