GE Multilin PQM User manual

PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–1
GE Consumer & Industrial
Multilin
PQM
Power Quality Meter™
INSTRUCTION MANUAL
Software Revision: 3.6x
Manual P/N: 1665-0003-CJ
Manual Order Code: GEK-106296E
Copyright © 2006 GE Multilin
GE Multilin
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: [phone] Fax: [phone]
Internet: http://www.GEmultilin.com
823787A4.CDR
STATUS COMMUNICATE RELAYS
VALUE
MESSAGE
ACTUAL
SETPOINT RESET
STORE
SIMULATION
ALARM
SELF TEST
PROGRAM
TX2
TX1
RX2
RX1
AUX2
ALARM
AUX3
AUX1
PQM Power Quality Meter
g
Ia = 100 Ib = 102
Ic = 100 AMPS
ISO9001:2000
G
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I
L
I
N
R
E
G
I
S
T
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E
D
GE Multilin's Quality Management
System is registered to ISO9001:2000
QMI # 005094
UL # A3775
*1665-0003-CK*
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These instructions do not purport to cover all details or variations in equipment nor provide
for every possible contingency to be met in connection with installation, operation, or
maintenance. Should further information be desired or should particular problems arise
which are not covered sufficiently for the purchaser’s purpose, the matter should be referred
to the General Electric Company.
To the extent required the products described herein meet applicable ANSI, IEEE, and NEMA
standards; but no such assurance is given with respect to local codes and ordinances
because they vary greatly.
© 2006 GE Multilin Incorporated. All rights reserved.
GE Multilin PQM Power Quality Meter instruction manual for revision 3.6x.
PQM Power Quality Meter, is a registered trademark of GE Multilin Inc.
The contents of this manual are the property of GE Multilin Inc. This documentation is
furnished on license and may not be reproduced in whole or in part without the permission
of GE Multilin. The content of this manual is for informational use only and is subject to
change without notice.
Part numbers contained in this manual are subject to change without notice, and should
therefore be verified by GE Multilin before ordering.
Part number: 1601-0003-CJ (September 2006)
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TOC TABLE OF CONTENTS
PQM POWER QUALITY METER – INSTRUCTION MANUAL TOC–I
Table of Contents
1: OVERVIEW INTRODUCTION .................................................................................................................1-1
DESCRIPTION ........................................................................................................................ 1-1
FEATURE HIGHLIGHTS ......................................................................................................... 1-2
APPLICATIONS ...................................................................................................................... 1-3
STANDARD FEATURES .....................................................................................................1-5
METERING ............................................................................................................................. 1-5
FUTURE EXPANSION ............................................................................................................ 1-6
OPTIONAL FEATURES .......................................................................................................... 1-6
ENERVISTA PQM SETUP SOFTWARE ................................................................................ 1-11
ORDER CODES ..................................................................................................................... 1-12
SPECIFICATIONS ................................................................................................................1-13
PQM SPECIFICATIONS ........................................................................................................ 1-13
2: INSTALLATION PHYSICAL ............................................................................................................................2-1
MOUNTING ........................................................................................................................... 2-1
PRODUCT IDENTIFICATION .................................................................................................. 2-2
REVISION HISTORY .............................................................................................................. 2-3
ELECTRICAL ........................................................................................................................2-5
EXTERNAL CONNECTIONS .................................................................................................. 2-5
CONTROL POWER ................................................................................................................ 2-15
VT INPUTS ............................................................................................................................ 2-15
CT INPUTS ............................................................................................................................ 2-15
OUTPUT RELAYS .................................................................................................................. 2-16
SWITCH INPUTS (OPTIONAL) .............................................................................................. 2-16
ANALOG OUTPUTS (OPTIONAL) ......................................................................................... 2-18
ANALOG INPUT (OPTIONAL) ............................................................................................... 2-19
RS485 SERIAL PORTS ........................................................................................................ 2-19
RS232 FRONT PANEL PORT ............................................................................................. 2-21
DIELECTRIC STRENGTH TESTING ....................................................................................... 2-22
3: OPERATION FRONT PANEL & DISPLAY ................................................................................................3-1
FRONT PANEL ...................................................................................................................... 3-1
DISPLAY ................................................................................................................................ 3-2
STATUS INDICATORS ........................................................................................................3-3
DESCRIPTION ........................................................................................................................ 3-3
STATUS .................................................................................................................................. 3-3
COMMUNICATE .................................................................................................................... 3-3
RELAYS .................................................................................................................................. 3-4
KEYPAD ................................................................................................................................3-5
DESCRIPTION ........................................................................................................................ 3-5
SETPOINT KEY ...................................................................................................................... 3-5
ACTUAL KEY ......................................................................................................................... 3-5
STORE KEY ............................................................................................................................ 3-5
RESET KEY ............................................................................................................................ 3-6
MESSAGE KEYS .................................................................................................................... 3-6
VALUE KEYS ......................................................................................................................... 3-7
DATA ENTRY METHODS ...................................................................................................... 3-7
SETPOINT ACCESS SECURITY ............................................................................................. 3-8
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TOC–II PQM POWER QUALITY METER – INSTRUCTION MANUAL
TABLE OF CONTENTS
DEFAULT MESSAGES ........................................................................................................3-9
DESCRIPTION ........................................................................................................................ 3-9
ADDING ADEFAULT MESSAGE .......................................................................................... 3-9
DELETING ADEFAULT MESSAGE ....................................................................................... 3-9
4: PROGRAMMING INTRODUCTION .................................................................................................................4-1
SETPOINT ENTRY METHODS ............................................................................................... 4-1
S1 PQM SETUP ...................................................................................................................4-3
DESCRIPTION ........................................................................................................................ 4-3
PREFERENCES ....................................................................................................................... 4-3
SETPOINT ACCESS ............................................................................................................... 4-4
RS485/RS232 SERIAL PORTS ......................................................................................... 4-7
DNP 3.0 CONFIGURATION ................................................................................................ 4-8
CLOCK ................................................................................................................................... 4-9
CALCULATION PARAMETERS ............................................................................................... 4-10
CLEAR DATA ......................................................................................................................... 4-12
EVENT RECORDER ................................................................................................................ 4-14
TRACE MEMORY ................................................................................................................... 4-15
PROGRAMMABLE MESSAGE ................................................................................................ 4-18
PRODUCT OPTIONS ............................................................................................................. 4-20
S2 SYSTEM SETUP .............................................................................................................4-21
CURRENT/VOLTAGE CONFIGURATION .............................................................................. 4-21
ANALOG OUTPUTS .............................................................................................................. 4-24
ANALOG INPUT .................................................................................................................... 4-29
SWITCH INPUTS ................................................................................................................... 4-31
PULSE OUTPUT .................................................................................................................... 4-33
PULSE INPUT ........................................................................................................................ 4-34
DATA LOGGER ...................................................................................................................... 4-36
S3 OUTPUT RELAYS ..........................................................................................................4-37
DESCRIPTION ........................................................................................................................ 4-37
ALARM RELAY ....................................................................................................................... 4-37
AUXILIARY RELAYS ............................................................................................................... 4-38
S4 ALARMS/CONTROL .....................................................................................................4-39
CURRENT/VOLTAGE ALARMS ............................................................................................. 4-39
TOTAL HARMONIC DISTORTION ......................................................................................... 4-45
FREQUENCY .......................................................................................................................... 4-46
POWER ALARMS .................................................................................................................. 4-47
POWER FACTOR ................................................................................................................... 4-49
DEMAND ALARMS ................................................................................................................ 4-52
PULSE INPUT ........................................................................................................................ 4-54
TIME ....................................................................................................................................... 4-55
MISCELLANEOUS ALARMS .................................................................................................. 4-57
S5 TESTING .........................................................................................................................4-58
TEST OUTPUT RELAYS & LEDS......................................................................................... 4-58
CURRENT/VOLTAGE SIMULATION ...................................................................................... 4-59
ANALOG OUTPUTS SIMULATION ........................................................................................ 4-60
ANALOG INPUT SIMULATION .............................................................................................. 4-61
SWITCH INPUTS SIMULATION ............................................................................................ 4-62
FACTORY USE ONLY ............................................................................................................ 4-62
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TOC TABLE OF CONTENTS
PQM POWER QUALITY METER – INSTRUCTION MANUAL TOC–III
5: MONITORING ACTUAL VALUES VIEWING ..............................................................................................5-1
DESCRIPTION ........................................................................................................................ 5-1
A1 METERING .....................................................................................................................5-3
CURRENT .............................................................................................................................. 5-3
VOLTAGE ...............................................................................................................................5-5
PHASORS .............................................................................................................................. 5-7
POWER .................................................................................................................................. 5-9
ENERGY ................................................................................................................................. 5-14
DEMAND ...............................................................................................................................5-16
FREQUENCY .......................................................................................................................... 5-17
PULSE COUNTER .................................................................................................................. 5-18
ANALOG INPUT .................................................................................................................... 5-19
A2 STATUS ..........................................................................................................................5-21
ALARMS ................................................................................................................................. 5-21
SWITCH STATUS .................................................................................................................. 5-23
CLOCK ................................................................................................................................... 5-24
PROGRAMMABLE MESSAGE ............................................................................................... 5-24
A3 POWER ANALYSIS .......................................................................................................5-25
POWER QUALITY .................................................................................................................. 5-25
TOTAL HARMONIC DISTORTION ......................................................................................... 5-26
DATA LOGGER ...................................................................................................................... 5-27
EVENT RECORDER ............................................................................................................... 5-28
A4 PRODUCT INFO ............................................................................................................5-33
SOFTWARE VERSIONS & MODEL INFORMATION ............................................................. 5-33
6: SOFTWARE INTRODUCTION .................................................................................................................6-1
OVERVIEW ............................................................................................................................ 6-1
HARDWARE CONFIGURATION ............................................................................................ 6-2
ENERVISTA PQM SETUP INSTALLATION ......................................................................6-4
CHECKING IF INSTALLATION/UPGRADE IS REQUIRED .................................................... 6-4
INSTALLING/UPGRADING ENERVISTA PQM SETUP ....................................................... 6-4
CONFIGURING ENERVISTA PQM SETUP COMMUNICATIONS ........................................ 6-6
ENERVISTA PQM SETUP MENUS ....................................................................................6-8
DESCRIPTION ........................................................................................................................ 6-8
UPGRADING FIRMWARE ..................................................................................................6-9
DESCRIPTION ........................................................................................................................ 6-9
SAVE/PRINT PQM SETPOINTS TO AFILE ......................................................................... 6-9
LOADING NEW FIRMWARE INTO THE PQM .................................................................... 6-9
FIRMWARE UPGRADE RECOVERY ...................................................................................... 6-11
LOADING SAVED SETPOINTS INTO THE PQM .................................................................. 6-13
USING ENERVISTA PQM SETUP .....................................................................................6-14
ENTERING SETPOINTS ......................................................................................................... 6-14
VIEWING ACTUAL VALUES ................................................................................................. 6-15
SETPOINT FILES .................................................................................................................... 6-15
GETTING HELP ..................................................................................................................... 6-15
POWER ANALYSIS .............................................................................................................6-17
WAVEFORM CAPTURE ......................................................................................................... 6-17
HARMONIC ANALYSIS ......................................................................................................... 6-18
TRACE MEMORY ................................................................................................................... 6-20
DATA LOGGER ...................................................................................................................... 6-22
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TOC–IV PQM POWER QUALITY METER – INSTRUCTION MANUAL
TABLE OF CONTENTS
7: MODBUS
COMMUNICATIONS
OVERVIEW ...........................................................................................................................7-1
MODBUS PROTOCOL ........................................................................................................... 7-1
ELECTRICAL INTERFACE ....................................................................................................... 7-1
DATA FORMAT & DATA RATE ............................................................................................ 7-2
DATA PACKET FORMAT ....................................................................................................... 7-2
ERROR CHECKING ................................................................................................................ 7-3
CRC-16 ALGORITHM ......................................................................................................... 7-3
TIMING .................................................................................................................................. 7-4
MODBUS FUNCTIONS ......................................................................................................7-5
PQM SUPPORTED MODBUS FUNCTIONS ........................................................................ 7-5
FUNCTION CODES 03/04 – READ SETPOINTS/ACTUAL VALUES ................................ 7-6
FUNCTION CODE 05 - EXECUTE OPERATION .................................................................. 7-7
FUNCTION CODE 05 – BROADCAST COMMAND ............................................................ 7-8
FUNCTION CODE 06 – STORE SINGLE SETPOINT ........................................................... 7-9
FUNCTION CODE 07 – READ DEVICE STATUS ................................................................ 7-10
FUNCTION CODE 08 – LOOPBACK TEST ......................................................................... 7-11
FUNCTION CODE 16 – STORE MULTIPLE SETPOINTS .................................................... 7-12
FUNCTION CODE 16 - PERFORMING COMMANDS ......................................................... 7-13
FUNCTION CODE 16 - BROADCAST COMMAND ............................................................. 7-14
ERROR RESPONSES .............................................................................................................. 7-15
MODBUS MEMORY MAP ..................................................................................................7-16
MEMORY MAP INFORMATION ............................................................................................ 7-16
USER-DEFINABLE MEMORY MAP ...................................................................................... 7-16
PQM MEMORY MAP ........................................................................................................... 7-17
MEMORY MAP DATA FORMATS ......................................................................................... 7-72
ANALOG OUTPUT PARAMETER RANGE ............................................................................. 7-92
8: DNP
COMMUNICATIONS
DNP 3.0 PROTOCOL ..........................................................................................................8-1
DEVICE PROFILE DOCUMENT ............................................................................................. 8-1
IMPLEMENTATION TABLE .................................................................................................... 8-4
DEFAULT VARIATIONS ......................................................................................................... 8-6
INTERNAL INDICATION BITS ................................................................................................ 8-6
BINARY INPUT / BINARY INPUT CHANGE POINT LIST .................................................... 8-7
BINARY OUTPUT / CONTROL RELAY OUTPUT POINT LIST ............................................. 8-9
POINT LIST FOR ANALOG INPUT/OUTPUT CHANGE ....................................................... 8-11
POINT LIST FOR COUNTERS ............................................................................................... 8-21
9: COMMISSIONING COMMISSIONING ..............................................................................................................9-1
10: MISCELLANEOUS WARRANTY .........................................................................................................................10-1
TABLE OF REVISIONS ........................................................................................................10-2
REVISIONS:
1605-0003-CH
TO
1605-0003-CJ ................................................................................................................. 10-2
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TOC TABLE OF CONTENTS
PQM POWER QUALITY METER – INSTRUCTION MANUAL TOC–V
APPENDIX: APPLICATION
NOTES
EVENT RECORDER .............................................................................................................A-1
INTERFACING USING HYPERTERMINAL .......................................................................A-7
PHASORS IMPLEMENTATION .........................................................................................A-10
TRIGGERED TRACE MEMORY ..........................................................................................A-12
PULSE OUTPUT APPLICATION .......................................................................................A-13
DATA LOGGER IMPLEMENTATION ................................................................................A-15
READING LONG INTEGERS FROM MEMORY MAP .....................................................A-20
PULSE INPUT APPLICATION ...........................................................................................A-22
PULSE TOTALIZER APPLICATION ...................................................................................A-24
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TOC–VI PQM POWER QUALITY METER – INSTRUCTION MANUAL
TABLE OF CONTENTS
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PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–1
PQM Power Quality Meter
Chapter 1: Overview
GE Consumer & Industrial
Multilin
823 8 A4 CDR
STATUS COMMUNICATE RELAYS
VALUE
MESSAGE
ACTUAL
SETPOINT RESET
STORE
SIMULATION
ALARM
SELF TEST
PROGRAM
TX2
TX1
RX2
RX1
AUX2
ALARM
AUX3
AUX1
PQM Power Quality Meter
g
Ia = 100 Ib = 102
Ic = 100 AMPS
Over vie w
1.1 Introduction
1.1.1 Description The GE Multilin PQM Power Quality Meter is an ideal choice for continuous monitoring of a
single or three-phase system. It provides metering for current, voltage, real power, reactive
power, apparent power, energy use, cost of power, power factor, and frequency.
Programmable setpoints and four assignable output relays allow control functions to be
added for specific applications. This includes basic alarm on over/under current or voltage,
unbalance, demand based load shedding, and capacitor power factor correction control.
More complex control is possible using the four switch inputs; these can also be used for
status information such as breaker open/closed, flow information, etc.
As a data gathering device for plant automation systems that integrate process,
instrument, and electrical requirements, all monitored values are available via one of two
RS485 communication ports running the Modbus protocol. If analog values are required
for direct interface to a PLC, any of the monitored values can output as a 4 to 20 mA (or 0
to 1 mA) signal to replace up to 4 separate transducers. A third RS232 communication port
connects to a PC from the front panel for simultaneous access of information by other
plant personnel.
With increasing use of electronic loads such as computers, ballasts, and variable
frequency drives, the quality of the power system is important. With the harmonic analysis
option, any phase current or voltage can be displayed and the harmonic content
calculated. Knowledge of the harmonic distribution allows action to be taken to prevent
overheated transformers, motors, capacitors, neutral wires, and nuisance breaker trips.
Redistribution of system loading can also be determined. The PQM can also provide
waveform and data printouts to assist in problem diagnosis.
Economical system monitoring or control is possible by selecting the non-display chassis
model as a system component and adding required options to obtain the desired level of
functionality.
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1–2 PQM POWER QUALITY METER – INSTRUCTION MANUAL
INTRODUCTION CHAPTER 1: OVERVIEW
1.1.2 Feature
Highlights
• Monitor: A, V, VA, W, var, kWh, kvarh, kVAh, PF, Hz
• Demand metering: W, var, A, VA
• Setpoints for alarm or control from most measured values, including: unbalance,
frequency, power factor, voltage, and current
• 4 output relays / 4 switch inputs for flexible control configuration
• 4 isolated analog outputs replace transducers for PLC interface
• 1 4-20 mA analog input
• Modbus communications
• Three COM ports (two rear RS485 ports and one front RS232 port) for access by
process, electrical, maintenance, and instrument personnel
• Harmonic analysis for power quality review and problem correction
• 40-character display and keypad for local programming
• Free EnerVista PQM Setup software for setpoint entry or monitoring from a PC
• Simulation mode for testing and training
• Compact design for panel or chassis mount
•AC/DCcontrolpower
FIGURE 1–1: PQM Feature Highlights - 1
823756am.cdr
STATUS COMMUNICATE RELAYS
VALUE
MESSAGE
ACTUAL
SETPOINT RESET
STORE
SIMULATION
ALARM
SELF TEST
PROGRAM
TX2
TX1
RX2
RX1
AUX2
ALARM
AUX3
AUX1
STATUS:
COMMUNICATE: RELAYS:
- Alarm condition present
- Setpoint programming is
enabled
- Simulated values being
used for test/training
- internal fault detected,
service required
ALARM
PROGRAM
SIMULATION
SELF TEST
For monitoring communication activity:
COM1 transmit data
COM1 receive data
COM2 transmit data
COM2 receive data
TX1
RX1
TX2
RX2
ALARM
AUX1
AUX2
AUX3
Auxiliary relay activated by
programmable function.
Alarm condition present.
See display for cause.
}
DISPLAY
40 character illuminated display for
programming, monitoring, status, fault
diagnosis, user programmable messages
and setpoints. Programmable auto scan
sequence for unattended operation.
SETPOINT KEY:
COMPUTER INTERFACE:
Program all setpoints. Tamperproof
settings with passcode and access jumper
prevent unauthorized setpoint changes.
RS232 comm port for connecting to a PC.
Use for downloading setpoints, monitoring,
data collection, printing reports.
KEYPAD:
DOOR:
Rubber keypad is dust tight and
splash proof.
Door covers keys and computer port
when not in use.
PQM Power Quality Meter
e
Ia = 100 Ib = 102
Ic = 100 AMPS
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CHAPTER 1: OVERVIEW INTRODUCTION
PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–3
FIGURE 1–2: PQM Feature Highlights - 2
1.1.3 Applications • Metering of distribution feeders, transformers, generators, capacitor banks, and
motors
• Medium and low voltage three-phase systems
• Commercial, industrial, utility
• Flexible control for demand load shedding, power factor, etc.
• Power quality analysis
• System debugging
823755AL.CDR
FUSE ACCESS
ANALOG INPUT
Controlpower fuse accessible under sliding
door.
Accept 4-20mA analog inputs for transducer
interface.
VT INPUTS:
0-600V,3wire or 4wire voltage inputs.
Direct (up to 600V) or VT(>600Vfor
isolation)connections.
CT INPUTS:
GROUND:
3isolated phase CT inputs
1isolated neutralCT input
1 Amp or 5 Amp secondary
Separate safety and filter ground
All inputs meet C37.90 and IEC 801-2
EMI,SWC, RFI interference immunity.
AC/DC CONTROL POWER
Universalcontrolpower
90-300 VDC
70-265 VAC
COMPACT DESIGN
Panelmount replaces many discrete
components with one standard model.
PROGRAMUPDATING
Flash memory storage of firmware for field
updating via communications port.Enables
product updating on-site for latest features.
COMMUNICATIONS
DualRS485 comm ports Modbus protocol.
Continuous monitoring/controlvia
SCADA system rear (RS485).
Front (RS232)or rear (RS485)access
allows simultaneous communication
via a PC or for redundant comms.
®
COM1
COM2/3
ANALOG OUTPUTS
4isolated 0-1mA or 4-20 mA outputs replace
8 transducers.Programmableincluding:
A, V,W, var, VA, Wh varh, PF,Hz
SWITCHINPUTS
A
B
C
D
Programmable for relay activation,
counters, logic, demand synchronization,
setpoint access, alarm position
4OUTPUT RELAYS
ALARM
AUX1
AUX2
AUX3
Programmablealarm conditions
actuated by programmable
setpoints, switch inputs, remote
communication control.
}
}
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1–4 PQM POWER QUALITY METER – INSTRUCTION MANUAL
INTRODUCTION CHAPTER 1: OVERVIEW
FIGURE 1–3: Single Line Diagram
823768A2.CDR
4
OUTPUT
RELAYS
4
TRANSDUCER
OUTPUTS
4
3
2
1
COM 2
RS232
PORT
COM 1
4 SWITCH
INPUTS FOR
CONTROL
-
4-20mA
ALARM
CONTROL
INSTRUMENTATION
ELECTRICAL
MAINTENANCE
MAIN
SCADA
3 PHASE
3/4 WIRE BUS
CTs VTs
0-600V DIRECT
>600V CT/VTs
AC/DC
CONTROL
POWER
PLC
or
RTU
PQM RELAY
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CHAPTER 1: OVERVIEW STANDARD FEATURES
PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–5
1.2 Standard Features
1.2.1 Metering True RMS monitoring of Ia, Ib, Ic, In, Van, Vbn, Vcn, Vab, Vbc, Vca, voltage/current unbalance,
power factor, line frequency, watts, vars, VA, Wh, varh, VAh, and demand readings for A, W,
vars, and VA. Maximum and minimum values of measured quantities are recorded and are
date and time stamped.
A 40-character liquid crystal display is used for programming setpoints and monitoring
values and status.
a) Alarms
Alarm conditions can be set up for all measured quantities. These include overcurrent,
undercurrent, neutral current, current unbalance, voltage unbalance, phase reversal,
overfrequency, underfrequency, power factor, switch inputs, etc. The alarm messages are
displayed in a simple and easy to understand English format.
b) Communication
The PQM is equipped with one standard RS485 port utilizing the Modbus or DNP 3.0
protocols. This can be used to integrate process, instrumentation, and electrical
requirements in a plant automation system by connecting PQM meters together to a DCS
or SCADA system. A PC running EnerVista PQM Setup can change system setpoints and
monitor values, status, and alarms. Continuous monitoring minimizes process downtime
by immediately identifying potential problems due to faults or changes from growth.
The PQM also includes a front RS232 port which may be employed to perform such tasks
as:
• data monitoring
• problem diagnosis
• viewing event records
•trending
• printing settings and/or actual values
• loading new firmware into the PQM
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1–6 PQM POWER QUALITY METER – INSTRUCTION MANUAL
STANDARD FEATURES CHAPTER 1: OVERVIEW
1.2.2 Future
Expansion
Flash memory is used to store firmware within the PQM. This allows future product
upgrades to be loaded via the serial port.
FIGURE 1–4: Downloading Product Enhancements via the Serial Port
PQM units can initially be used as standalone meters. Their open architecture allows
connection to other Modbus compatible devices on the same communication link. These
can be integrated in a complete plant-wide system for overall process monitoring and
control.
1.2.3 Optional
Features
c) Transducer Option
Four isolated 4 to 20 mA (or 0 to 1 mA depending on the installed option) analog outputs
are provided that can replace up to eight transducers. The outputs can be assigned to any
measured parameters for direct interface to a PLC.
One 4 to 20 mA analog input is provided to accept a transducer output for displaying
information such as temperature or water level.
An additional rear RS485 communication port is provided for simultaneous monitoring by
process, instrument, electrical, or maintenance personnel.
FIGURE 1–5: Additional Communication Port
823774A6.CDR
Transfer new firmware
to the PQM
Product update
from GE Power
Management
Products CD
VALUE
MESSAGE
ACTUAL
SETPOINT RESET
STORE
823779A8.CDR
•Data monitoring
•Problem diagnosis
•Event records
•Trending
•Report printing
Main plant
control/monitoring
communication
interface
RS485 RS485
RS232
Print reports
Use 2nd/3rd comm ports for simultaneous
access by electrical, maintenance,
process, instrumentation personnel
for
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CHAPTER 1: OVERVIEW STANDARD FEATURES
PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–7
d) Control Option
An additional three dry-contact form “C” output relays and four dry-contact switch inputs
are provided. These additional relays can be combined with setpoints and inputs/outputs
for control applications. Possibilities include:
• undercurrent alarm warnings for pump protection
• over/undervoltage for generators
• unbalance alarm warnings to protect rotating machines
• dual level power factor for capacitor bank switching
• underfrequency/demand output for load shedding resulting in power cost savings
• kWh, kvarh and kVAh pulse output for PLC interface
• Pulse input for totalizing quantities such as kWh, kvarh, kVAh, etc.
FIGURE 1–6: Switch Inputs and Outputs Relays
e) Power Analysis Option
Non-linear loads (such as variable speed drives, computers, and electronic ballasts) can
cause unwanted harmonics that may lead to nuisance breaker tripping, telephone
interference, and transformer, capacitor or motor overheating. For fault diagnostics such
as detecting undersized neutral wiring, assessing the need for harmonic rated
transformers, or judging the effectiveness of harmonic filters, details of the harmonic
spectrum are useful and available with the power analysis option.
DCS
RS485
MODBUS
4
RELAYS
ALARM
AUX 1
AUX 2
AUX 3
4
SWITCH
INPUTS
823775A7.DWG
PQM
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1–8 PQM POWER QUALITY METER – INSTRUCTION MANUAL
STANDARD FEATURES CHAPTER 1: OVERVIEW
FIGURE 1–7: Harmonic Spectrum
Voltage and current waveforms can be captured and displayed on a PC with EnerVista
PQM Setup or third party software. Distorted peaks or notches from SCR switching provide
clues for taking corrective action.
FIGURE 1–8: Captured Waveform
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CHAPTER 1: OVERVIEW STANDARD FEATURES
PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–9
Alarms, setpoint triggers, and input and output events can be stored in a 40-event record
and time/date stamped by the internal clock. This is useful for diagnosing problems and
system activity. The event record is available through serial communication. Minimum and
maximum values are also continuously updated and time/date stamped.
Routine event logs of all measured quantities can be created, saved to a file, and/or
printed.
FIGURE 1–9: Data Logger
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1–10 PQM POWER QUALITY METER – INSTRUCTION MANUAL
STANDARD FEATURES CHAPTER 1: OVERVIEW
The power analysis option also provides a Trace Memory feature. This feature can be used
to record specified parameters based on the user defined triggers.
FIGURE 1–10: Trace Memory Triggers
FIGURE 1–11: Trace Memory Capture
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