GE PACSystems* RX3i User manual

PACSystems* RX3i
GFK-2748C Power Sync and Measurement System
May 2014 IC694PSM001-AB and IC694ACC200-A
RUN
PSM001
GRID 2
GRID 1
FLT
GRID 1
2
CAL
CAL
Module Offset: -2 Module Gain: 4000H
Module Offset: -2 Module Gain: 4000H
The PACSystems Power Sync and Measurement (PSM) system monitors two independent
three-phase power grids. It incorporates advanced digital signal processor (DSP) technology
to continuously process three voltage inputs and four current inputs for each grid.
Measurements include RMS voltages, RMS currents, RMS power, frequency, and phase
relationship between the phase voltages of both grids.
The PSM module performs calculations on each captured waveform, with the DSP
processing the data in less than two-thirds of a power line cycle. The PSM module can be
used with wye or delta type three-phase power systems or with single-phase power systems.
The PSM system can be used for applications such as:
Electrical power consumption monitoring and reporting
Fault monitoring
Generator control features for generator to power grid synchronization
Demand penalty cost reduction/load shedding
The PSM system consists of:
PSM module – A standard IC694 module that mounts in an RX3i rack. The PSM
module provides the DSP capability.
Terminal Assembly –A panel-mounted unit that provides the interface between the
PSM module and the input transformers.
Interface cables –Provide the GRID 1 and GRID 2 connections between the PSM
module and the Terminal Assembly.
PSM System Features
Uses standard, user-supplied current transformers (CTs) and potential transformers
(PTs) as its input devices.
Accurately measures RMS voltage and current, power, power factor, frequency,
energy, and total three-phase 15-minute power demand.
Provides two isolated relays that close when the voltage phase relationships between
the two monitored grids are within the specified ANSI 25 limits provided by the RX3i
host controller. These contacts can be used for general-purpose, lamp duty or pilot
duty loads. Voltage and current ratings for these load types are provided in GFK-2749,
PACSystems RX3i Power Sync and Measurement System User’s Manual.
Provides a cable monitoring function that indicates when the cables linking the PSM
module and Terminal Assembly are correctly installed.
PSM module and Terminal Assembly are easily calibrated by hardware configuration
using the Proficy* Machine Edition (PME) software.
Ordering Information
IC694PSK001 PSM System. Includes a PSM module, a Terminal Assembly and two interface cables
IC694PSM001
Replacement PSM module
IC694ACC200
Replacement Terminal Assembly
IC694CBL200
One replacement 2m (6.56 ft.) interface cable
IC694ACC201 PSM replacement parts:
two finger guards
four thumb screws
one relay connector
two grounding lug nuts
____________________________
© 2014 General Electric Company. All Rights Reserved.
*Indicates a trademark of General Electric Company and/or its subsidiaries. All other trademarks are the property of their
respective owners.

2 RX3i Power Sync and Measurement System
GFK-2748C
Specifications
PSM Module Power Requirements
Backplane Power Consumption
400 mA max. at 5 VDC
Total Power Dissipation
2.0 W max.
Isolation from Backplane
1500 VDC
Maximum number of PSM modules per
RX3i system
No restrictions, as long as the power supply has sufficient capacity
Sync Relay Contacts
Two isolated relay outputs General purpose: 125 VAC / 125 VDC maximum at 1 amp
Lamp duty: 125 VAC / 125 VDC maximum at 1 amp
Pilot duty: 125 VAC / 125 VDC maximum at 0.35 amp
Switching speeds
Turn-on time
Turn-off time
20 ms
5 ms
Measurement Specifications
Three voltage inputs per grid All voltage data is scaled in 0.1 VAC units.
Impedance: >1 MΩ
Range
Low range
High range
45–150 VAC RMS (120 VAC nominal)
120–690 VAC RMS (600 VAC CAT IV; 690 VAC CAT III)
Frequency
30–70 Hz
Four current inputs per grid All current data is scaled in 0.001 Amp units.
Impedance
<5 milliohms
Range
0–5 A RMS (5 A nominal)
Frequency 30–70 Hz
Phase difference between grids:
±180O
Measurement Accuracy
1
Voltage
0.2%
Current 0.2%
kW, kVAR, kVA
0.4%
kWH, kVARH, kVAH
0.4%
Power factor
1%
Frequency 0.01 Hz
Phase angle
0.1O
Terminal Assembly Input Terminal Ratings
Current
15 Amps continuous maximum
Voltage
690 VAC RMS
Sync Relay contacts 150 VAC/VDC at 1 Amp Resistive, maximum
Note: Actual contact ratings depend on load type. Refer to Sync Relay
Contacts above.
1In the presence of severe conducted RF interference (IEC 61000-4-6, 10 volts) accuracy could be degraded by ±2% of full
scale.

RX3i Power Sync and Measurement System 3
GFK-2748C
RX3i CPU Memory Requirement for Automatic Data Exchange
%I
80 bits
%Q
32 bits
%AI
64 words
%AQ 2 words
Data Exchange Time Between RX3i CPU and PSM
A complete data exchange between the PSM and RX3i occurs during each controller scan.
Minimum scan time is 3.5 ms per PSM module in the backplane. Minimum data update rate is one power line period.
Refer to GFK-2749, the sections, System Operation and PSM Status Flags.
ANSI Protective Functions
ANSI 25 – Generator and Public Grid Synchronization
ANSI 27 – Under-voltage Protection
ANSI 32 – Reverse Power Protection
ANSI 47 –Voltage Phase Sequence Protection
ANSI 50 – Instantaneous Over-current Protection
ANSI 59 – Over-voltage Protection
ANSI 60 – Voltage (Current) Imbalance Protection
ANSI 81U – Under-frequency Protection
ANSI 81O – Over-frequency Protection
Power Measurement Configurations
Four-wire three phase wye systems: 3 PTs and 3 CTs plus Neutral CT (optional)
Three-wire three phase delta systems: 2 PTs and 2 CTs
Three independent single phase systems: 1 PT and 1 CT for each phase
Three-wire single phase systems: 120/240 (2 PTs and 2 CTs)
Operating Environment
Enclosure mounting Required. PSM module and Terminal Assembly must be installed in a
NEMA/UL Type 1 enclosure or an IP20 rating providing at least a pollution
degree 2 environment.
When this system is installed in an area designated as Class 1 Zone 2 in
Europe, compliance with the ATEX Directive requires an enclosure with a
minimum rating of IP54.
For product standards, general operating sepcifications, and installation requirements, refer to GFK-2749, PACSystems RX3i
Power Sync and Measurement System User’s Manual.
Installation in Hazardous Locations
The following information is for products bearing the UL marking for Hazardous Areas, or ATEX marking for explosive
atmospheres:
Class 1 Division 2 Groups ABCD
•This equipment shall be installed in an ultimate enclosure suitable for the environment that is only accessible with the
use of a tool.
•Suitable for use in Class I, Division 2, Groups A, B, C and D Hazardous Locations, or nonhazardous locations only.
EXPLOSION HAZARD - Substitution of components may impair suitability for class I, division 2.

4 RX3i Power Sync and Measurement System
GFK-2748C
When in hazardous locations, turn off power before replacing or wiring modules; and
DO NOT connect or disconnect equipment unless power has been switched off or the area is known
to be nonhazardous.
ATEX Zone 2
This product must be mounted in an enclosure certified in accordance with EN60079-15 for use in Zone 2, Group IIC and rated
IP54. The enclosure shall only be able to be opened with the use of a tool .
Quick Reference Guide
HIGH VOLTAGE; HIGH CURRENT
DO NOT TOUCH the connectors or wiring after powering up the PSM system. Hazardous voltages
exist, and death or injury may result.
The Terminal Assembly frame ground connection must always be installed and must be installed
before any other wiring is attached.
To reduce risk of electric shock or damage to the attached CTs, always open or disconnect all
voltage circuits and apply the shorting bar connections to the current inputs before installing or
servicing the connections to the Terminal Assembly.
Never disconnect the GRID 1 or GRID 2 field wiring while power is present. Personal injury or
equipment damage may result. Finger guards must be installed on the Terminal Assembly before
energizing the field wiring.
User Supplied Equipment
The user must supply the following components depending upon the application. This equipment includes:
5 Amp current transformers
Potential transformers for all installations
1 Amp fuses for each of the voltage leads connected to the Terminal Assembly.
1 Amp fuse for the common or return line for the voltage lead on the Terminal Assembly.
A CT shorting block for each current transformer (CT) connection used on the Terminal Assembly when used with
external CTs.
Installation
Enclosures
The Terminal Assembly and PSM module are considered open equipment (having live electrical parts that may be accessible
to users) and must be installed in a protective enclosure or incorporated into other assemblies manufactured to provide safety.
As a minimum, the enclosure or assemblies shall provide a degree of protection against solid objects up to 12 mm (for
example, fingers). For Non Hazardous environments, this equates to a NEMA/UL Type 1 enclosure or an IP20 rating providing
at least a pollution degree 2 environment.
The enclosure must be able to adequately dissipate the heat generated by all components mounted inside so that no
components overheat. Heat dissipation is also a factor in determining the need for enclosure cooling options such as fans and
air conditioning.
Installing the PSM Module

RX3i Power Sync and Measurement System 5
GFK-2748C
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 Function
1
GRID 1 Operation: 0 = disabled, 1 = enabled
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.
2
GRID 1 Voltage Selection: 0 = low voltage range (120VAC), 1 = high voltage range (600VAC)
Caution: The voltage range is determined by the physical connections in the power system. Changing this
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.
3
GRID 1 Grid Operational Mode: 0 = single phase, 1 = three-phase
4
GRID 1 Connection mode:
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
5
GRID 1 PTA measurement: 0 = GRID 1 PTA not connected, 1 = GRID 1 PTA connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
6
GRID 1 CTA measurement: 0 = GRID 1 CTA not connected, 1 = GRID 1 CTA connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
7
GRID 1 PTB measurement: 0 = GRID 1 PTB not connected, 1 = GRID 1 PTB connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
8
GRID 1 CTB measurement: 0 = GRID 1 CTB not connected, 1 = GRID 1 CTB connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
9
GRID 1 PTC measurement: 0 = GRID 1 PTC not connected, 1 = GRID 1 PTC connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.

6 RX3i Power Sync and Measurement System
GFK-2748C
%Q Bit
Offset Function
10
GRID 1 CTC measurement: 0 = GRID 1 CTC not connected, 1 = GRID 1 CTC connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
11
GRID 1 CTN measurement: 0 = GRID 1 CTN not connected, 1 = GRID 1 CTN connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
12
GRID 1 Waveform Capture: When this bit is transitioned from 0 to 1 by the control logic, the PSM module
captures 128 samples of all seven data variables on GRID 1.
13
GRID 1 Delta Mode: 0 = B phase is common, 1= C phase is common
This bit must be set to 0 if phase B is used as the common connection for the other two voltages (North
American standard). If the phase C is used as the common phase in a Delta connection, this bit must be
set to 1.
14
Reserved
15
GRID 1 Energy reset: When set, the accumulated energy values for GRID 1 are reset and held
at 0 Wh and 0 VARh. When cleared, the GRID 1 energy values represent the accumulated energy since
the last reset.
16
Relay open: Works with bit 32 to control the Sync Relay operation.
For more information, refer to Relay Open/Relay Close Operation in GFK-2749.
17
GRID 2 Operation: 0 = disabled, 1 = enabled
If disabled, the PSM module does no measurements for the GRID 2 (generator 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.
18
GRID 2 Voltage Selection: 0 = low voltage range (120VAC), 1 = high voltage range (600VAC)
Caution: The voltage range is determined by the physical connections in the power system. Changing
this 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
.
19
GRID 2 Grid Operational Mode: 0 = single phase, 1 = three-phase
20
GRID 2 Connection mode:
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
21
GRID 2 PTA measurement: 0 = GRID 2 PTA not connected, 1 = GRID 2 PTA connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
22
GRID 2 CTA measurement: 0 = GRID 2 CTA not connected, 1 = GRID 2 CTA connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
23
GRID 2 PTB measurement: 0 = GRID 2 PTB not connected, 1 = GRID 2 PTB connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
24
GRID 2 CTB measurement: 0 = GRID 2 CTB not connected, 1 = GRID 2 CTB connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
25
GRID 2 PTC measurement: 0 = GRID 2 PTC not connected, 1 = GRID 2 PTC connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
26
GRID 2 CTC measurement: 0 = GRID 2 CTC not connected, 1 = GRID 2 CTC connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
27
GRID 2 CTN measurement: 0 = GRID 2 CTN not connected, 1 = GRID 2 CTN connected
The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.
28
GRID 2 Waveform Capture: When this bit is transitioned from 0 to 1 by the control logic, the PSM module
captures 128 samples of all seven data variables on GRID 2.
29
GRID 2 Delta Mode: 0 = B phase is common, 1= C phase is common
This bit must be set to 0 if phase B is used as the common connection for the other two voltages (North
American standard). If the phase C is used as the common phase in a Delta connection, this bit must be
set to 1.
30 Reserved
31
GRID 2 Energy reset: When set, the accumulated energy values for GRID 1 are reset and held at 0 Wh
and 0 VARh. When cleared, the GRID 1 energy values represent the accumulated energy since the last
reset.

RX3i Power Sync and Measurement System 7
GFK-2748C
%Q Bit
Offset Function
32
Relay Close: Works with bit 16 to control the Sync Relay operation.
For more information, refer to Relay Open/Relay Close Operation in GFK-2749.
PSM Status Flags
The PSM returns 80 status flag bits to the RX3i controller. Those 80 bits are grouped into five 16-bit words.
The first status word (%I1 – %I16) contains the overall PSM status flags.
The following two words (%I17 – %I48) contain the individual grid measurement faults. These flags identify
the voltage/current channel experiencing a measurement problem. It can be one or multiple problems
related to:
- Input signal not present, that is, it is indicated as not measured in the corresponding %Q flag bit. If the
signal is not measured, it cannot be reconstructed by the PSM module firmware.
- Input signal is measured but it is clamped due to a higher peak voltage/current value than the
maximum value allowed to be applied to the interface unit
The last two status words (%I49 – %I80) contain the individual grid status flags, including the ANSI alarms.
%I Bit
Offset Definition Value
Status/Alarm
Timing
A, B, AB: Refer to
the section,
Status/Alarm
Timing
Alarm
2
Availability
1ø3ø
1
PSM HeartBeatBit:
Toggled with every scan/sweep
Updated every
scan
ü
ü
2
PSM ConnectionOK:
1 = OK
0 = PSM to Terminal Assembly
connection failure
A
ü
ü
3
PSM PhaseShiftOK:
1 = OK
0 = ANSI 25/1 Alarm
A
ü
4 PSM DeltaVoltOK: 1 = OK
0 = ANSI 25/2 Alarm
A
ü
5
PSM DeltaFreqOK:
1 = OK
0 = ANSI 25/3 Alarm
A
ü
6 PSM AllGridAlarmsOK 1 = OK
0 = At least one alarm on either
grid is set
AB
ü
7 PSM RelayCloseOK: 1 = OK
0 = Do not close relay
A
ü
8
PSM New Data
1 = The current PLC sweep is the
first sweep this power line
cycle data is being delivered
by the PSM to the PLC.
0 = Data has not changed from
previous sweep.
A
ü
ü
9 - 16
Reserved
2Alarm availability: A checkmark indicates whether an alarm is available for use in either the 1-Phase (1ø) or the 3-Phase
(3ø) Grid Operational Mode (refer to Mode Control Bits Sent to PSM Module in GFK-2749). All alarms are available in 3-Phase
mode. An absent checkmark indicates that the value of the bit is indeterminate and the bit should be ignored.

8 RX3i Power Sync and Measurement System
GFK-2748C
%I Bit
Offset Definition Value
Status/Alarm
Timing
A, B, AB: Refer to
the section,
Status/Alarm
Timing
Alarm2
Availability
1ø3ø
17 GRID 1 FaultVA 0 = OK
1 = Fault – clamped or not
calculated/measured
A
ü
ü
18 GRID 1 FaultIA A
ü
ü
19 GRID 1 FaultVB A
ü
ü
20
GRID 1 FaultIB:
A
ü
ü
21 GRID 1 FaultVA/VBA;
VB/VAC; VC/VBC A
ü
ü
22 GRID 1 FaultIC A
ü
ü
23 GRID 1 FaultIN A
ü
ü
24-32
Reserved
33 GRID 2 FaultVA_VCA 0 = OK
1 = Fault – clamped or not
calculated/measured
A
ü
ü
34 GRID 2 FaultIA A
ü
ü
35
GRID 2 FaultVB_VCB
A
ü
ü
36 GRID 2 FaultIB: A
ü
ü
37 GRID 2 FaultVC: A
ü
ü
38
GRID 2 FaultIC
A
ü
ü
39 GRID 2 FaultIN A
ü
ü
40 - 48
Reserved
49
GRID 1 ClampedFreq
0 = OK
1 = Line Frequency outside the
range (30 - 70 Hz)
A
ü
ü
50 GRID 1 ClampedInput: 0 = OK
1 = some inputs have signal
clamped
A
ü
ü
51 GRID 1 MixedPolarity 0 = OK
1 = At least one phase PT/CT has
wrong polarity
B
ü
52
GRID 1 VoltPhSeqAlarm
0 = OK
1 = ANSI 47 Alarm
B
ü
53
GRID 1 UnderVoltAlarm
0 = OK
1 = ANSI 27 Alarm B
ü
54 GRID 1 ReversPwrAlarm 0 = OK
1 = ANSI 32 Alarm
B
ü
55 GRID 1 OverCurrAlarm 0 = OK
1 = ANSI 50 Alarm
B
ü
ü

RX3i Power Sync and Measurement System 9
GFK-2748C
%I Bit
Offset Definition Value
Status/Alarm
Timing
A, B, AB: Refer to
the section,
Status/Alarm
Timing
Alarm2
Availability
1ø3ø
56
GRID 1 OverVoltAlarm
0 = OK
1 = ANSI 59 Alarm
B
ü
57
GRID 1 VIImbalanceAlarm
0 = OK
1 = ANSI 60 Alarm B
ü
58 GRID 1 UnderFreqAlarm 0 = OK
1 = ANSI 81U Alarm
B
ü
ü
59
GRID 1 OverFreqAlarm
0 = OK
1 = ANSI 81O Alarm
B
ü
ü
60 - 64 Reserved
ü
65 GRID 2 ClampedFreq: 0 = OK
1 = Line Frequency outside the
range (30 - 70 Hz)
A
ü
ü
66 GRID 2 ClampedInput: 0 = OK
1 = some inputs have signal
clamped
A
ü
ü
67 GRID 2 MixedPolarity 0 = OK
1 = At least one phase PT/CT has
wrong polarity
B
ü
68
GRID 2 VoltPhSeqAlarm
0 = OK
1 = ANSI 47 Alarm B
ü
69 GRID 2 UnderVoltAlarm 0 = OK
1 = ANSI 27 Alarm
B
ü
70
GRID 2 ReversPwrAlarm
0 = OK
1 = ANSI 32 Alarm B
ü
71
GRID 2 OverCurrAlarm
0 = OK
1 = ANSI 50 Alarm
B
ü
ü
72
GRID 2 OverVoltAlarm
0 = OK
1 = ANSI 59 Alarm
B
ü
73
GRID 2 VIImbalanceAlarm
0 = OK
1 = ANSI 60 Alarm
B
ü
74
GRID 2 UnderFreqAlarm
0 = OK
1 = ANSI 81U Alarm
B
ü
ü
75
GRID 2 OverFreqAlarm
0 = OK
1 = ANSI 81O Alarm
B
ü
ü
76 – 80
Reserved
Status/Alarm Timing
Timing A – The PSM buffers an entire power line cycle and takes 11 ms to perform calculations on the waveforms. The new
status bits are available to the application code after the next PLC input data scan.
Total latency = 1-cycle + 11 ms + (0 to PLC scan time)
Update rate = 1-cycle or the PLC scan rate (whichever is longer)
Timing B– The PSM updates this information every 100 ms. The new status bits are available to the application code after
the next PLC input data scan.

10 RX3i Power Sync and Measurement System
GFK-2748C
Update rate = 100 ms or the PLC scan rate (whichever is longer)
Timing AB – AllGridAlarmsOK follows the timing of the alarm that causes it to be cleared or set.
LEDs
LED State Definition
RUN
Green
The module is operating correctly and communicating with the RX3i.
Red
The module is operating without backplane communication.
Off The module is not operating.
FLT
Green, blinking
During the period when GREEN is ON, Grid 1 can be connected to Grid 2.
Green, steady
Grid 1 and Grid 2 are connected.
Red
The module has detected a fault condition.
Off The module has not detected a fault and the grids are not synchronized.
GRID 1
Green
Indicates a voltage signal has been detected on Grid 1.
Red
A frequency out-of-range condition has been detected on Grid 1.
Off
No zero crossing signal of Grid 1 has been detected during the last 250 ms
time period.
GRID 2
Green
Indicates a voltage signal has been detected on Grid 2
Red A frequency out-of-range condition has been detected on Grid 2.
Off No zero crossing signal of Grid 2 has been detected during the last 250 ms
time period.

RX3i Power Sync and Measurement System 11
GFK-2748C
Field Wiring
Wiring to the PSM consists of:
the connection cable between the Terminal Assembly and the PSM
the leads to user-supplied potential and mandatory user-supplied current transformers
Sync relay output connections, and
frame ground connections from the Terminal Assembly to the chassis
No CT shorting bars are provided on the PSM Terminal Assembly; these must be supplied by the user.
Requirements for Terminal Assembly Connections
Terminal Assembly connections above 600 VAC require prepared wire ends, such as tinning of the conductors, or use of
crimpled or soldered forked connectors or ferrules.
Terminal connections for COM1, COM2, voltage sensing and current sensing terminals
Terminal torque: 1.81 Nm (16 in-lb)
Wiring size/type: 0.823 mm2– 5.26 mm2(18–10 AWG) solid/stranded
Relay output terminal connections
Terminal torque: 0.8 Nm (7 in-lb)
Wiring size/type: 0.205 mm2– 0.410 mm2(24–21 AWG) solid/stranded
For additional wiring and connectin information, refer to GFK-2749, PACSystems RX3i Power Sync and Measurement Module
User's Manual.
The PSM Terminal Assembly connects to hazardous voltages. Before installing, testing, or
troubleshooting this module, you should refer to the complete instructions in the PACSystems RX3i
Power Sync and Measurement Module User's Manual, GFK-2749. Failure to follow the published
guidelines may result in personal injury, equipment damage, or both.
Note: Although Grid 1 and Grid 2 are interchangeable, you should connect the most stable source to Grid 1. Between a
utility grid and a generator, the utility grid is the best choice for connection to the PSM Grid 1 inputs. This will yield the
most accuracy and the least reading-to-reading fluctuation.
Basic PSM System Connections
Grid 1 power system connections to
user PTs with fuses and CTs with
shorting bars
Grid 2 power system connections to
user PTs with fuses and CTs with
shorting bars
Sync
Contacts
Interface cables
Load(s)

12 RX3i Power Sync and Measurement System
GFK-2748C
Release History
Version Firmware
Revision Date Comments
IC694PSM001-AB 1.01 January 2013 Enhanced operation of sync relay feature as
described below.
IC694PSM001-AA 1.00 December 2012 Initial release
Important Product Information for Release 1.01
New Features and Enhancements
With this release, the PSM accounts for the breaker delay, and the rate of change of the phase shift between the grids, to time
the CloseRelayOK status and ACC200 relay outputs to close the sync relay contacts when the phase shift between the grids is
0⁰.
This release also adds the special case of Breaker Delay = 0. When the ANSI 25 Breaker Delay parameter is set to 0, the
PSM turns off breaker delay calculations and operates in Classic sync relay mode. In Classic mode, the PSM sets the
CloseRelayOK status and the ACC200 relay outputs to On whenever the application requests a sync and the phase shift
between the grids is in the range –Phase Shift Threshold to +Phase Shift Threshold.
Functional Compatibility
Subject Version Required
Programmer Version
Requirements
Proficy Machine Edition Logic Developer 7.50 with SIM 2 or newer or
Proficy Machine Edition Logic Developer 7.00 with SIM 12 or newer or
Proficy Machine Edition Logic Developer 7.60 or newer
CPU Firmware Version
RX3i CPU firmware versions 7.15, 7.16, 7.17, and 7.18.
Note: The PSM module is not compatible with IC695CPE305 and C695CPE310
firmware version 7.30.
CPU firmware version 7.70 or newer support the IC694PSM001 module on these
CPU types:
IC695CPE305
IC695CPE310
IC695CPU315
IC695CPU320
IC695CRU320, including –QP (Quad Redundancy)
IC695NIU001+
Operational Notes
Subject Description
Wiring COM1 and COM2 of the IC694ACC200 must be connected to functional ground
(Earth ground).
COM1 and COM2 must not be connected to Neutral in a WYE power system.
In certain fault conditions, Neutral can be pulled to the full voltage of any phase. Such
a fault condition can pose a danger to personnel and damage the IC694ACC200. See
GFK-2749 for wiring diagrams.

RX3i Power Sync and Measurement System 13
GFK-2748C
Subject Description
Breaker Delay
When the ANSI 25 Breaker Delay parameter is set to a non-zero value, the phase
angle difference at which CloseRelayOK (%I offset 7) is set and the IC694ACC200
relay outputs close varies, in direct proportion to the rate of change of the phase
angle of Grid 2 relative to Grid 1. Higher rates of phase angle change and larger
breaker delays require that the PSM assert CloseRelayOK earlier to ensure that the
breaker contacts close within the safe region set by the ANSI 25 Phase Shift
Threshold parameter (Phase_Shift_Thr).
If the PSM does not receive a request to Sync (%Q offset 16=0 and %Q offset 32=1)
in time for the relay outputs to close within the Phase Shift Threshold limits, it will not
assert CloseRelayOK until the next opportunity.
Breaker Delay = 0
Special Case When the ANSI 25 Breaker Delay parameter is set to zero, the PSM reverts to classic
sync relay operation. The PhaseShiftOK bit will be set when
–Phase_Shift_Thr < Phase Shift < +Phase_Shift_Thr.
The PSM will not adjust its synchronization timing based on either the interval
between CloseRelayOK being set and the relay contacts actually closing or the rate of
change of the Phase Shift between the two grids. If a request to Sync (%Q offset
16=0 and %Q offset 32=1) is active at any time when the Phase Shift is within
±Phase_Shift_Thr, the CloseRelayOK bit and the relay outputs on the IC694ACC200
terminal assembly will be turned On.
Delta Power Configurations
Phase-to-Neutral voltages are not reported in Delta power configurations because
there is no Neutral reference.
Nominal Voltage
Nominal Voltage refers to the:
Phase-to-Neutral RMS voltage in a WYE power system.
Phase-to-Phase RMS voltage in a Delta power system.
Nominal Current Setting a negative Nominal Current value implies that the IC694ACC200 grid inputs
are connected to a load (drawing power), rather than 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. RMS current is necessarily reported as a positive number, due to the RMS
calculations.
Scaling for PT and CT Ratios
The IC694PSM001 module reports the voltages and currents measured at the
IC694ACC200 terminals. Therefore, the application logic must correct for PT and CT
ratios to reflect the actual power grid voltages, currents, powers and energies.
Example:
Using 480V:120V PTs requires the application logic to multiply the reported voltage
values by 4. Using 100:5 CTs requires the application logic to multiply the reported
current values by 20. Since power and energy combine voltage and current, the
reported power and energy values must both be multiplied by 80 (4 x 20).
ANSI Alarm Delays
All ANSI alarm delays apply to both setting and clearing the alarms. A delay of 10
seconds means the grid must be in the alarm state for 10 continuous seconds before
the PSM will set the alarm bit; clearing the CloseRelayOK bit and opening the relay
outputs(if the grids were synchronized). Once the alarm is set, the alarm condition
must be eliminated for 10 continuous seconds for the alarm to be cleared.
Relay Output Options
The isolated, bipolar relay outputs are redundant. Both relay 1 and relay 2 follow the
CloseRelayOK %I offset 7 bit from the PSM. They can be connected in parallel to
increase the reliability of closing, or in series, to increase the reliability of opening, to
suit the needs of the application.
Voltage Configuration
The Voltage Selection in the Proficy Machine Edition Hardware Configuration must
match both the physical cable connection to the IC694ACC200 terminal assembly
and the %Q offset 2 (Grid 1) and %Q offset 18 (Grid 2) configuration bits. Refer to
GFK-2749 for proper wiring and configuration information.

14 RX3i Power Sync and Measurement System
GFK-2748C
Subject Description
Reverse Power Threshold
The Reverse Power Threshold affects Grid 1 and Grid 2 differently:
For Grid 1, the Reverse Power alarm will be triggered if a circuit’s active power
exceeds the Reverse Power Threshold for a time period longer than Reverse
Power Delay.
For Grid 2, the Reverse Power alarm will be triggered if a circuit’s active power
falls below the Reverse Power Threshold for a time period longer than Reverse
Power Delay.
VI Imbalance
The VI Imbalance Alarm compares voltage phases to voltage phases, and current
phases to current phases within a grid. No comparison is made between grids. If any
voltage varies from the average of all three voltages, or if any current varies from the
average of all three currents (by more than the VI Imbalance Threshold) for longer
than the VI Imbalance Delay, that grid’s VI Imbalance Alarm is set.
Example 1:
VI Imbalance is set to 20%, VA1 = 126V, VB1 = 90V, VC1 = 124V
The difference between VB1 and the average of the three voltages is greater than
20%, so the VI Imbalance alarm will be set.
Example 2:
VI Imbalance is set to 25%, IA2 = 4.2A, IB2 = 3.6A, IC2 = 5.5A
The difference between IC2 and the average of the three currents is less than 25%,
so the VI Imbalance alarm will not be set.
Setting Programmatic
Parameters Proficy Machine Edition Hardware Configuration parameters are entered as Floating
Point numbers in engineering units. Changing the same parameters programmatically
(using %AQ offset 1 and 2) requires the use of 16-bit Integers which vary from the
Floating Point numbers by factors of 10. Refer to GFK-2749 for details on how to
change configuration parameters in Run Mode.
Power Factor
Although the PSM reports power factor information using three decimal places, the
information is only accurate to two decimal places.