GE PACSystems RX3i, IC694PSM001-AB, IC694ACC200-A User Manual

PACSystems* RX3i

RUN

PSM001

GRID 2

GRID 1

FLT

GRID 1

2

CAL

CAL

Module Offset: -2

Module Gain: 4000H

Module Offset: -2

Module Gain: 4000H

IC694PSM001

Replacement PSM module

IC694ACC200

Replacement Terminal Assembly

IC694CBL200

One replacement 2m (6.56 ft.) interface cable

two grounding lug nuts

GFK-2748C Power Sync and Measurement System
May 2014 IC694PSM001-AB and IC694ACC200-A

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 pr ocess 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 consi st s 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

IC694ACC201 PSM replacement parts:

two finger guards
four thumb screws
one relay connector

____________________________
© 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

Backplane Power Consumption

400 mA max. at 5 VDC

Total Power Dissipation

2.0 W max.

Isolation from Backplane

1500 VDC

RX3i system

Pilot duty: 125 VAC / 125 VDC maximum at 0.35 amp

5 ms

Frequency

30–70 Hz

Impedance

<5 milliohms

Range

0–5 A RMS (5 A nominal)

Phase difference between grids:

±180O

Voltage

0.2%

kW, kVAR, kVA

0.4%

kWH, kVARH, kVAH

0.4%

Power factor

1%

Phase angle

0.1O

Current

15 Amps continuous maximum

Voltage

690 VAC RMS

Contacts above.

GFK-2748C

Specifications

PSM Module Power Requirements

Maximum number of PSM modules per

Sync Relay Contacts

Two isolated relay outputs General purpose: 125 VAC / 125 VDC maximum at 1 amp

Switching speeds

Turn-on time
Turn-off time

Measurement Specifications

Three voltage inputs per grid

Impedance:
Range

Low range
High range

Four current inputs per grid

Frequency 30–70 Hz

Measurement Accuracy 1

No restrictions, as long as the power supply has sufficient capacity

Lamp duty: 125 VAC / 125 VDC maximum at 1 amp

20 ms

All voltage data is scaled in 0.1 VAC units.
>1 MΩ

45–150 VAC RMS (120 VAC nominal)
120–690 VAC RMS (600 VAC CAT IV; 690 VAC CAT III)

All current data is scaled in 0.001 Amp units.

Current 0.2%

Frequency 0.01 Hz

Terminal Assembly Input Terminal Ratings

Sync Relay contacts 150 VAC/VDC at 1 Amp Resistive, maximum

Note: Actual contact ratings depend on load type. Refer to Sync Relay

1

In 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

%I

80 bits

%Q

32 bits

%AI

64 words

A complete data exchange between the PSM and RX3i occurs during each controller scan.
Refer to GFK-2749, the section s, System Operation and PSM Status Flags.

ANSI 25 – Generator and Public Grid Synchronization

ANSI 27 – Under-voltage Protection

ANSI 32 – Reverse Power Protection

ANSI 47 –Voltage Phase Sequence Protection

ANSI 59 – Over-voltage Protection

ANSI 60 – Voltage (Current) Imbalance Protection

ANSI 81U – Under-frequency Protection

ANSI 81O – Over-frequency Protection

Four-wire three phase wye systems: 3 PTs and 3 CTs plus Neutral CT (optional)

Three-wire single phase systems: 120/240 (2 PTs and 2 CTs)

GFK-2748C

RX3i CPU Memory Requirement for Automatic Data Exchange

%AQ 2 words

Data Exchange Time Between RX3i CPU and PSM

Minimum scan time is 3.5 ms per PSM module in the backplane. Minimum data update rate is one power line period.

ANSI Protective Functions

ANSI 50 – Instantaneous Over-current Protection

Power Measurement Configurations

Three-wire three phase delta systems: 2 PTs and 2 CTs
Three independent single phase systems: 1 PT and 1 CT for each phase

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 assembl ies shall prov ide a degree of protection against solid object s 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 t he 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

1

GRID 1 Operation: 0 = disabled, 1 = enabled

GRID 1 Voltage Selection: 0 = low voltage range (120VAC), 1 = high voltage range (600VAC)

bit to a value that does not match the physical configuration will result in erroneous power system

3

GRID 1 Grid Operational Mode: 0 = single phase, 1 = three-phase

GRID 1 Connection mode:

• 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

GRID 1 CTA measurement: 0 = GRID 1 CTA not connected, 1 = GRID 1 CTA connected

GRID 1 PTB measurement: 0 = GRID 1 PTB not connected, 1 = GRID 1 PTB connected

GRID 1 CTB measurement: 0 = GRID 1 CTB not connected, 1 = GRID 1 CTB connected

GRID 1 PTC measurement: 0 = GRID 1 PTC not connected, 1 = GRID 1 PTC connected

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

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

Caution: The voltage range is determined by the physical connections in the power system. Changing this

measurements. Note: Do not change this value in while in RUN 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

5

The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.

6

The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.

7

The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.

8

The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.

9

The PSM module reconstructs the missing variable. Refer to Reconstructed Variables in GFK-2749.

Function