PACSystems RX3i - ANSI Protection Parameters

User Manual Chapter 3
GFK-2749A Jan 2020
Configuration and Data Transfer 37
Parameter
Function
VCxH Gain
Calibration constant. Value provided on the ACC200
Terminal Assembly label.
Improves the accuracy of the 600V range of channel 5 (VC).
This value can be further adjusted to compensate for
inaccuracies of external Potential Transformers and wiring.
Range: 0h to FFFFh
Default: 4000h
ICx Gain
Calibration constant. Value provided on the ACC200
Terminal Assembly label.
Improves the accuracy of the current measurement of
channel 6 (IC). This value can be further adjusted to
compensate for inaccuracies of external Current
Transformers and wiring.
Range: 0h to FFFFh
Default: 4000h
INx Gain
Calibration constant. Value provided on the ACC200
Terminal Assembly label.
Improves the accuracy of the current measurement of
channel 7 (IN). This value can be further adjusted to
compensate for inaccuracies of external Current
Transformers and wiring.
Range: 0h to FFFFh
Default: 4000h
3.1.3 ANSI Protection Parameters
Use this tab to configure the ANSI functions for Grid 1 (Public Grid/Load) and Grid 2
(Generator/Generator Grid).
These parameters specify the ANSI alarm thresholds and debounce time periods.
Parameter
Function
ANSI 25 Phase Shift Threshold
(degrees)
The angle window, in electrical degrees, around the zero
degree phase angle difference between Grid 1 and Grid 2 that
will be allowed.
For example, a value of 10 means the PSM module is allowed
to close the synchronizing relay when the Grid 2 voltage phase
is within ±10
⁰
of the Grid 1 voltage phase.
Range: 0.1 to 45.0
Default: 10.0