GE PACSystems RX3i User Manual page 5

RX3i Power Sync and Measurement System
The PSM module must be installed in a main (CPU) rack in an RX3i system. For system-level installation information, refer to
GFK-2314, PACSystems RX3i System Manual. The IC694PSM001 Module can be hot-swapped in an RX3i backplane.
Installing the Terminal Assembly
The Terminal Assembly must be securely installed on a rigid, conductive, 12 – 14 gauge steel panel using four user supplied
M4 - M5 or #8 - #10 SAE bolts. The Terminal Assembly should be mounted near the host controller rack containing the PSM
module, close enough to accommodate the 2 meter interface cables provided.
For detailed installation and power system connection instructions, refer to GFK-2749, PACSystems RX3i Power Sync and
Measurement Module User's Manual.
Configuration
The PSM module is configured using the Proficy Machine Edition programming software. For compatible versions, refer to
page 12.
Configuration parameters are used to set nominal values for Grid 1 and Grid 2 voltage, current and frequency, and to calibrate
the PSM system for specific Potential Transformer and Current Transformer gains, increasing the accuracy of the measured
values. Configuration parameters are also used to set ANSI device threshold and delay values.
A Mode Control register, consisting of 32 bits in %Q memory, selects operational and measurement modes. This application
must apply initial values to these bits and can change them while the PSM is running.
The application can change a single configuration parameter in run mode by modifying the two-word Parameter Write register
in %AQ memory.
Mode Control Bits
The RX3i CPU sends 32 %Q bits of Mode Control data to the PSM module every sweep. The application logic must apply
initial values to these bits on the first RX3i scan. The application can change these settings during operation to modify
measurement modes in response to changing conditions.
%Q Bit
Offset
GRID 1 Operation: 0 = disabled, 1 = enabled
1
If disabled, the PSM module does no measurements for the GRID1 (power grid) inputs.
Note: Both grid control offset bits (Q1 and Q17) must be enabled in order for the PSM module to operate
as a 2-source synchronizer.
GRID 1 Voltage Selection: 0 = low voltage range (120VAC), 1 = high voltage range (600VAC)
2
Caution: The voltage range is determined by the physical connections in the power system. Changing this
GRID 1 Grid Operational Mode: 0 = single phase, 1 = three-phase
3
GRID 1 Connection mode:
4
Works with the Grid Operational Mode setting to determine system type.
• In single phase mode: 0 = Three single phases ,1 = Three-wire, single phase (120/240) using
PTA and PTB
• In three-phase mode: 0 = WYE system configuration, 1 = DELTA system configuration
GRID 1 PTA measurement: 0 = GRID 1 PTA not connected, 1 = GRID 1 PTA connected
5
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
GRID 1 CTA measurement: 0 = GRID 1 CTA not connected, 1 = GRID 1 CTA connected
6
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
GRID 1 PTB measurement: 0 = GRID 1 PTB not connected, 1 = GRID 1 PTB connected
7
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
GRID 1 CTB measurement: 0 = GRID 1 CTB not connected, 1 = GRID 1 CTB connected
8
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
GRID 1 PTC measurement: 0 = GRID 1 PTC not connected, 1 = GRID 1 PTC connected
9
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
bit to a value that does not match the physical configuration will result in erroneous power system
measurements. Note: Do not change this value in while in RUN mode.
Function
5
GFK-2748C