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PACSystems RX3i
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User Manual Chapter 3
GFK-2749A Jan 2020
Configuration and Data Transfer 73
ANSI Protection Tab
Note that synchronization is an option in 3-phase mode, so the ANSI 25 parameters can be
left at their default values or changed to suit the application.
Figure 33
%Q Configuration Values
This table shows the settings for both grids. These bits must be set during the first PLC scan
when the PLC transitions to run mode. %Q offset 2, 3 & 4 and 18, 19 & 20 set the PSM for the
field voltage and power configuration. Setting these values incorrectly will yield invalid
readings. All remaining bits may be changed during run mode to adapt to changing field
conditions.
%Q Bit
Offset
Function
Value
Comment
1
GRID 1 Operation
1
Enable grid 1
2
GRID 1 Voltage Selection
0
120VAC range
3
GRID 1 Grid Operational Mode
1
3-phase
4
GRID 1 Connection mode
0
4-wire, Wye power system
5
GRID 1 PTA_CA measurement
1
VA1 measurement is on
6
GRID 1 CTA measurement
1
IA1 measurement is on

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