PACSystems RX3i - Page 39

User Manual Chapter 3
GFK-2749A Jan 2020
Configuration and Data Transfer 35
Parameter
Function
Nominal Current [Amps]
Enter the maximum anticipated current delivered by the
external Current Transformers.
All process currents must be scaled to a value of 5 Amps or
less. This value is used by the ANSI calculations to determine
overcurrent, VI Imbalance and in setting the fault status bits
Note: Setting a negative Nominal Current value implies
that the IC694ACC200 grid inputs are connected
to a load (drawing power) instead of a power
source (producing power). The power and energy
values will be reported as negative numbers. The
CTs must be wired with the correct polarity to
achieve the negative power and energy values.
You are responsible for the correct PTs/CTs
connections to obtain the negative sign of each
reported phase (and the total) active power.
RMS current is necessarily reported as a positive
number, due to the RMS calculations
Range: -7.5 to 7.5
Default: 5.0
Nominal Frequency [Hz]
Select the steady-state frequency of the grid.
This value is used by the ANSI calculations to determine
under/over frequency.
Choices: 50, 60
Default: 60
Module Offset
Calibration constant. Value provided on the PSM001 module
label.
Setting this value allows maximum measurement accuracy.
Range: -1000 to +1000
Default: 0
Module Gain
Calibration constant. Value provided on the PSM001 module
label.
Setting this value allows maximum measurement accuracy.
Range: 0h to FFFFh
Default: 4000h
VAxL Gain
Calibration constant. Value provided on the ACC200
Terminal Assembly label.
Improves the accuracy of the 120V range of channel 1 (VA).
This value can be further adjusted to compensate for
inaccuracies of external Potential Transformers and wiring.
Range: 0h to FFFFh
Default: 4000h