GE Multilin PQMII Power Quality Meter instruction manual for revision 2.2x.
PQMII 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: 1601-0118-AD (May 2010)
TABLE OF CONTENTS
Table of Contents
1: OVERVIEWINTRODUCTION TO THE PQMII ................................................................................................... 1-1
A2 STATUS ........................................................................................................................................... 6-18
PQMII POWER QUALITY METER – INSTRUCTION MANUALTOC–V
TABLE OF CONTENTS
TOC–VIPQMII POWER QUALITY METER – INSTRUCTION MANUAL
Digital Energy
Multilin
PQMII Power Quality Meter
Chapter 1: Overview
Overview
1.1Introduction to the PQMII
1.1.1Description
The GE Multilin PQMII 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 and flow information.
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 four (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 PQMII can also provide
waveform and data printouts to assist in problem diagnosis.
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–1
1.1.2Feature Highlights
• Monitoring: 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,
• four (4) output relays / four (4) switch inputs for flexible control configuration
• four (4) isolated analog outputs replace transducers for PLC interface
• one 4 to 20 mA analog input
• Modbus communications
• Three COM ports (two rear RS485 ports and one front RS232 port) for access by
• Harmonic analysis for power quality review and problem correction
• 40-character display and keypad for local programming
• No-charge EnerVista PQMII Setup Software
• Simulation mode for testing and training
• Compact design for panel mount
•AC/DC control power
CHAPTER 1: OVERVIEW
frequency, power factor, voltage, and current
process, electrical, maintenance, and instrument personnel
1.1.3Applications of the PQMII
• 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
1–2PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
Four (4)
output
relays
Four (4)
transducer
outputs
4
3
2
1
COM 2
RS232
PORT
COM 1
Four switch
inputs for
control
–
4to20mA
Alarm
control
Instrumentation
Electrical
Maintenance
Main
SCADA
Three-phase
3/4-wire bus
CTs
VTs
0 to 600 V direct
> 600V CT/VTs
Control
power
(AC/DC)
PLC
or
RTU
PQMII
PC running
EnerVista PQMII Setup
746701A1.CDR
FIGURE 1–1: Single Line Diagram
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–3
CHAPTER 1: OVERVIEW
FIGURE 1–2: Feature Highlights
1–4PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
1.2Standard Features
1.2.1Metering
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.
1.2.2Alarms
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 .
1.2.3Communications
The PQMII is equipped with one standard RS485 port utilizing the Modbus or DNP
protocols. This can be used to integrate process, instrumentation, and electrical
requirements in a plant automation system by connecting several PQMII meters together
to a DCS or SCADA system. A PC running the EnerVista PQMII Setup Software 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 PQMII also includes a front RS232 port which can be used for the following tasks:
• data monitoring
• problem diagnosis
•viewing event records
•trending
• printing settings and/or actual values
• loading new firmware into the PQMII
1.2.4Future Expansion
Flash memory is used to store firmware within the PQMII. This allows future product
upgrades to be loaded via the serial port.
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–5
1.2.5Open Architecture
PQMII 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.
CHAPTER 1: OVERVIEW
FIGURE 1–3: Downloading Product Enhancements via the Serial Port
1–6PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
1.3Optional Features
1.3.1Transducer Input/Outputs
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 1–4: Additional Communication Port
1.3.2Control 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
• overvoltage/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 saving
• kWh, kvarh and kVAh pulse output for PLC interface
• Pulse input for totalizing quantities such as kWh, kvarh, kVAh, etc.
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–7
FIGURE 1–5: Switch Inputs and Outputs Relays
CHAPTER 1: OVERVIEW
1.3.3Power 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.
FIGURE 1–6: Harmonic Spectrum
1–8PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
Voltage and current waveforms can be captured and displayed on a PC with the EnerVista
PQMII Setup Software or EnerVista Viewpoint. Distorted peaks or notches from SCR
switching provide clues for taking corrective action.
FIGURE 1–7: Captured Waveform
Alarms, triggers, and input/output events can be stored in a 150-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.
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–9
CHAPTER 1: OVERVIEW
FIGURE 1–8: Data Logger
Routine event logs of all measured quantities can be created, saved to a file, and/or
printed.
For additional information on waveform sampling and analysis features, see Power Analysis on page 4–13.
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.
1–10PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
FIGURE 1–9: Trace Memory Capture
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–11
1.4EnerVista PQMII Setup Software
1.4.1Overview
All data continuously gathered by the PQMII can be transferred to a third party software
program for display, control, or analysis through the communications interface. The
EnerVista PQMII Setup Software allows the user to view and manipulate this data and
assists in programming the PQMII. Some of the tasks that can be executed using the
EnerVista PQMII Setup Software package include:
• reading metered data
• monitoring system status
• changing PQMII setpoints on-line
• saving setpoints to a file and downloading into any PQMII
• capturing and displaying voltage and current waveforms for analysis
• recording demand profiles for various measured quantities
• troubleshooting communication problems with a built in debugger
• printing graphs, charts, setpoints, and actual values
CHAPTER 1: OVERVIEW
The EnerVista PQMII Setup Software is fully described in Software on page 4–1.
FIGURE 1–10: EnerVista PQMII Setup Software Main Window
1–12PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
1.5Order Codes
1.5.1Order Code Table
Power Analysis
The order code for all options is: PQMII-T20-C-A
Table 1–1: Order Codes
PQMII
Basic UnitPQMII –
Transducer
Option
Control
Option
Option
SSS
|
|
|
|
–
|
|
|
|
|
T1
|
|
|
|
|
|
|
C–||
T20 –
|
|
–
|
|
|
|
–
|
|
|
|
–
|
|
|
A
Basic unit with display, all current/voltage/power
measurements, one (1) RS485 communication port,
one (1) RS232 communication port
Four (4) isolated analog outputs, 0-20 mA and 4-20
mA assignable to all measured parameters, 4-20 mA
analog input, 2nd RS485 communication port
Four (4) isolated analog outputs, 0-1 mA assignable
to all measured parameters, 4-20 mA analog input,
2nd RS485 communication port
Three (3) additional programmable output relays (for
a total of 4), 4 programmable switch inputs
Harmonic analysis, triggered trace memory,
waveform capture, event recorder, data logger,
voltage disturbance recorder*
* The voltage disturbance recorder is only available with the 25 MHz processor.
1.5.2Modifications
Consult the factory for any additional modification costs):
1.5.3Accessories
Consult the factory for any additional accessory costs:
• MOD 501: 20 to 60 V DC / 20 to 48 V AC Control Power
• MOD 502: Tropicalization
• MOD 504: Removable Terminal Blocks
• MOD 506: 4-Step Capacitor Bank Switching (Available with Option "C" only)
• EnerVista PQMII Setup Software (included with the PQMII; also available at http://
www.enerVista.com)
• RS232 to RS485 converter (required to connect a PC to the PQMII RS485 ports)
• GE MultiNET RS485 serial-to-Ethernet converter (required for connection to an
Ethernet network)
• RS485 terminating network
1.5.4Control Power
• 90 to 300 V DC / 70 to 265 V AC standard
• 20 to 60 V DC / 20 to 48 V AC (MOD 501)
PQMII POWER QUALITY METER – INSTRUCTION MANUAL1–13
1.6Specifications
CHAPTER 1: OVERVIEW
Note
Specifications are subject to change without notice.
1–20PQMII POWER QUALITY METER – INSTRUCTION MANUAL
Digital Energy
Multilin
PQMII Power Quality Meter
Chapter 2: Installation
Installation
2.1Physical Configuration
2.1.1Mounting
Physical dimensions and required cutout dimensions for the PQMII are shown below. Once
the cutout and mounting holes are made in the panel, use the eight #6 self-tapping screws
provided to secure the PQMII. Mount the unit on a panel or switchgear door to allow
operator access to the keypad and indicators.
Product attributes vary according to the configuration and options selected on the
customer order. Before applying power to the PQMII, examine the label on the back and
ensure the correct options are installed.
The following section explains the information included on the label shown below:
• Model No: Shows the PQMII configuration. The model number for a basic panel
mount PQMII is “PQMII”. T20, C, and A appear in the model number only if the
Transducer, Control, or Power Analysis options are installed.
• Supply Voltage: Indicates the power supply input configuration installed in the
PQMII. The PQMII shown in this example can accept any AC 50/60Hz voltage from
70 to 265 V AC or DC voltage from 90 to 300 V DC.
• Tag#: An optional identification number specified by the customer.
• Mod#: Indicates if any unique features have been installed for special customer
orders. This number should be available when contacting GE Multilin for technical
support.
• Version: An internal GE Multilin number that should be available when contacting
us for technical support.
• Serial No.: Indicates the serial number in numeric and barcode formats. Record
this number when contacting GE Multilin for technical support .
CHAPTER 2: INSTALLATION
FIGURE 2–2: Product Label
2–2PQMII POWER QUALITY METER – INSTRUCTION MANUAL
2.1.3Manual and Firmware Revisions
Each instruction manual revision corresponds to a particular firmware revision. The
manual revision is located on the title page as part of the manual part number (the format
is 1601-nnnnmanual part number, and is also loaded in the PQMII, where it can be viewed by scrolling
to the
A4 PRODUCT INFO ÖØ SOFTWARE VERSIONS ÖØ MAIN PROGRAM VERSION message.
When using the instruction manual to determine PQMII features and settings, ensure that
the instruction manual revision corresponds to the firmware revision installed in the PQMII.
revision). The firmware revision is located on that same page, just above the
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