Alstom iSTAT M3x5 Series User manual

iSTAT M3x5
Power Quality Analyser
Manual
iSTAT M3x5
Power Quality Analyser
Publication Reference: iSTAT M3x5/EN/M/B
iSTAT M3x5/EN/M/B © 2014. ALSTOM, the ALSTOM logo and any alternative version thereof are trademarks and service marks of ALSTOM. The other names
mentioned, registered or not, are the property of their respective companies. The technical and other data contained in this document is provided for information only.
Neither ALSTOM, its officers or employees accept responsibility for, or should be taken as making any representation or warranty (whether express or implied), as to
the accuracy or completeness of such data or the achievement of any projected performance criteria where these are indicated. ALSTOM reserves the right to revise or
change this data at any time without further notice.
GRID

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1. SAFETY SECTION
This Safety Section should be read before commencing any work on the equipment.
1.1 Health and Safety
The information in the Safety Section of the product documentation is intended to ensure
that products are properly installed and handled in order to maintain them in a safe condition.
It is assumed that everyone who will be associated with the equipment will be familiar with
the contents of the Safety Section.
1.2 Explanation of symbols and labels
The meaning of symbols and labels may be used on the equipment or in the product
documentation, is given below.
Caution: refer to product documentation Caution: risk of electric shock
Protective/safety *earth terminal Functional *earth terminal
Note: This symbol may also be used
for a protective/safety earth terminal if
that terminal is part of a terminal block
or sub-assembly e.g. power supply.
*NOTE: The term earth used throughout the product documentation is the
direct equivalent of the North American term ground.

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2. INSTALLING, COMMISSIONING AND SERVICING
Equipment connections
Personnel undertaking installation, commissioning or servicing work on this equipment
should be aware of the correct working procedures to ensure safety. The product
documentation should be consulted before installing, commissioning or servicing the
equipment.
Terminals exposed during installation, commissioning and maintenance may present a
hazardous voltage unless the equipment is electrically isolated.
If there is unlocked access to the rear of the equipment, care should be taken by all
personnel to avoid electrical shock or energy hazards.
Voltage and current connections should be made using insulated crimp terminations to
ensure that terminal block insulation requirements are maintained for safety. To ensure that
wires are correctly terminated the correct crimp terminal and tool for the wire size should be
used.
Before energising the equipment it must be earthed using the protective earth terminal, or
the appropriate termination of the supply plug in the case of plug connected equipment.
Omitting or disconnecting the equipment earth may cause a safety hazard.
The recommended minimum earth wire size is 2.5mm2, unless otherwise stated in the
technical data section of the product documentation.
Before energising the equipment, the following should be checked:
Voltage rating, frequency and polarity
VT ratio and phase sequence
CT circuit rating and integrity of connections;
Protective fuse rating;
Integrity of earth connection (where applicable)
Supply voltage
External switch or circuit-breaker must be included in the installation for disconnection
of the devices’ auxiliary power supply. It must be suitably located and properly
marked for reliable disconnection of the device when needed.

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3. EQUIPMENT OPERATING CONDITIONS
The equipment should be operated within the specified electrical and environmental limits.
3.1 Current transformer circuits
Do not open the secondary circuit of a live CT since the high level voltage produced may be
lethal to personnel and could damage insulation.
3.2 Insulation and dielectric strength testing
Insulation testing may leave capacitors charged up to a hazardous voltage. At the end of
each part of the test, the voltage should be gradually reduced to zero, to discharge
capacitors, before the test leads are disconnected.
3.3 Opening enclosure
There are no customer replaceable PCB cards or components within the enclosure, so the
enclosure should not be opened.
4. DECOMMISSIONING AND DISPOSAL
Decommissioning: The auxiliary supply circuit in the relay may include capacitors across
the supply or to earth. To avoid electric shock or energy hazards,
after completely isolating the supplies to the relay (both poles of any
dc supply), the capacitors should be safely discharged via the external
terminals prior to decommissioning.
Disposal: It is recommended that incineration and disposal to water courses is
avoided. The product should be disposed of in a safe manner. Any
products containing batteries should have them removed before
disposal, taking precautions to avoid short circuits. Particular
regulations within the country of operation, may apply to the disposal
of lithium batteries.

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5. TECHNICAL SPECIFICATIONS
5.1 Protective fuse rating
The recommended maximum rating of the external protective fuse for this equipment is 6A,
Red Spot type or equivalent, unless otherwise stated in the technical data section of the
product documentation.
Insulation class: EN 61010-1 : 2010 Class II
Insulation Category
(Over voltage):
EN 61010-1 : 2010
Category II (600V), III (300V)
Environment: EN 61010-1 : 2010
Pollution degree 2
Compliance is demonstrated by
reference to generic safety
standards.
Product Safety:
2006/95/EC
EN 61010-1 : 2010
Compliance with the European
Commission Low Voltage
Directive.
Compliance is demonstrated by
reference to generic safety
standards.
6. CONTACT ADDRESS
The supplier of the product is: ALSTOM GRID UK LTD
Who can be contacted via the Worldwide Contact Centre.
Email: [email protected]
Phone: [phone]

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CONTENTS
1.SAFETYSECTION1
1.1HEALTHANDSAFETY1
1.2EXPLANATIONOFSYMBOLSANDLABELS1
2.INSTALLING,COMMISSIONINGANDSERVICING2
3.EQUIPMENTOPERATINGCONDITIONS3
3.1CURRENTTRANSFORMERCIRCUITS3
3.2INSULATIONANDDIELECTRICSTRENGTHTESTING3
3.3OPENINGENCLOSURE3
4.DECOMMISSIONINGANDDISPOSAL3
5.TECHNICALSPECIFICATIONS4
5.1PROTECTIVEFUSERATING4
6.CONTACTADDRESS4
7.INTRODUCTION11
7.1GENERAL11
7.2PURPOSE13
7.3FAMILY13
7.4QDSP213
7.5MEASUREMENTS14
7.6HARDWAREFEATURES14
7.7COMMUNICATIONANDINPUTS/OUTPUTS15
7.8USERFEATURES16
7.9APPLICATIONS16
8.HARDWARE18
8.1FRONTPANEL18
8.2REARCONNECTIONS19
8.3MOUNTING19
8.4AUXILIARYSUPPLY20
8.5VOLTAGEANDCURRENTMEASUREMENTCONNECTIONS21
8.6COMMUNICATIONS23
8.6.1RS232/RS485COMMUNICATIONS23
8.6.2ETHERNETCOMMUNICATIONS24
8.6.3USBCOMMUNICATIONS24
8.7INPUTSANDOUTPUTS–MAINMODULES1&224
8.7.1ENERGYPULSEOUTPUTS25
8.7.2TARIFFINPUTS25
8.7.3ALARMOUTPUTS26

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8.7.4ANALOGUEOUTPUTS26
8.7.5DIGITALINPUTS26
8.7.6WATCHDOGOUTPUTANDALARMOUTPUT(COMBINED)27
8.7.7ANALOGUEINPUT27
8.8INPUTSANDOUTPUTS–AUXILIARYMODULESA&B28
8.8.1ALARMOUTPUTS28
8.8.2DIGITALINPUTS28
8.9REALTIMESYNCHRONIZATIONMODULEC29
8.9.1GPSTIMESYNCHRONIZATION29
8.9.2IRIGTIMECODEB(IRIG‐B)29
8.9.3SIMPLENETWORKTIMEPROTOCOL(SNTP)29
8.9.4MODULECONNECTIONS30
8.10MEMORYCARD31
9.GETTINGSTARTED32
9.1MENUINTRODUCTION32
9.2DISPLAYICONS33
9.3INSTALLATIONWIZARD33
9.4DISPLAYOFDEVICEINFORMATION36
10.M3X5PROGRAMMING37
10.1INTRODUCTION37
10.2QDSP2SOFTWARE37
10.2.1DEVICESMANAGEMENT37
10.2.2INSTRUMENTSETTINGS37
10.2.3REALTIMEMEASUREMENTS37
10.2.4DATAANALYSIS37
10.2.5SOFTWAREUPGRADING37
10.3SETTINGPROCEDURE38
10.4GENERALSETTINGS39
10.4.1DESCRIPTIONANDLOCATION39
10.4.2AVERAGEINTERVAL39
10.4.3AVERAGEINTERVALFORMIN/MAXVALUES39
10.4.4LANGUAGE39
10.4.5CURRENCY39
10.4.6TEMPERATUREUNIT39
10.4.7DATEFORMAT39
10.4.8DATEANDTIME39
10.4.9REALTIMESYNCHRONISATIONSOURCE40
10.4.10TIMEZONE40
10.4.11AUTOSUMMER/WINTERTIME40
10.4.12MAXIMUMDEMANDCALCULATION(MDMODE)40
10.4.13MAXIMUMDEMANDRESETMODE43
10.4.14MIN/MAXRESETMODE(KD)43
10.4.15STARTINGCURRENTFORPFANDPA(MA)43
10.4.16STARTINGCURRENTFORALLPOWERS(MA)43
10.4.17STARTINGVOLTAGEFORSYNC(V)44
10.4.18CALCULATIONOFHARMONICS44
10.4.19REACTIVEPOWERANDENERGYCALCULATION44
10.5CONNECTION45
10.5.1CONNECTION45

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10.5.2SETTINGOFCURRENTANDVOLTAGERATIOS45
10.5.3USEDVOLTAGEANDCURRENTRANGE46
10.5.4NOMINALFREQUENCY46
10.5.5MAXIMUMDEMANDCURRENTFORTDD46
10.5.6WRONGCONNECTIONWARNING46
10.5.7ENERGYFLOWDIRECTION46
10.5.8CTCONNECTION46
10.6COMMUNICATION47
10.6.1SERIALCOMMUNICATIONPARAMETERS(COM1)47
10.6.2ETHERNETCOMMUNICATION47
10.6.3USB50
10.7DISPLAY50
10.7.1DISPLAYSETTINGS50
10.7.2DEMOCYCLINGPERIOD50
10.7.3SETTINGSOFCUSTOMIZEDSCREENS50
10.8SECURITY51
10.8.1PASSWORDSETTING52
10.8.2PASSWORDMODIFICATION(KD)52
10.8.3PASSWORDDISABLING(KD)52
10.9ENERGY52
10.9.1ACTIVETARIFF(KD)53
10.9.2COMMONENERGYCOUNTERRESOLUTION(KD)53
10.9.3COMMONENERGYCOSTEXPONENT53
10.9.4COMMONTARIFPRICEEXPONENTANDENERGYPRICEINTARIFFS53
10.9.5MEASUREDENERGY53
10.9.6INDIVIDUALCOUNTERRESOLUTION54
10.9.7TARIFFSELECTOR55
10.9.8TARIFFCLOCK55
10.10INPUTSANDOUTPUTS(MAINMODULES1&2)57
10.10.1ANALOGUEOUTPUTMODULE57
10.10.2ALARM/DIGITALOUTPUTMODULE(KD)58
10.10.3PULSEOUTPUTMODULE(KD)59
10.10.4TARIFFINPUTMODULE59
10.10.5DIGITALINPUTMODULE59
10.10.6WATCHDOGOUTPUT(ANDRELAYOUTPUT)MODULE60
10.10.7ANALOGUEINPUTMODULE60
10.11INPUTSANDOUTPUTS(AUXILIARYMODULESA&B)60
10.11.1DIGITALINPUTMODULE(8CHANNELS)60
10.11.2RELAYOUTPUTMODULE(8CHANNELS)61
10.12RTCSYNCHRONIZATIONMODULEC61
10.12.1GPSTIMESYNCHRONIZATION61
10.12.2IRIGTIMECODEB(IRIG‐B)61
10.12.3SERIALCOMMUNICATION(COM2)62
10.13ALARMS63
10.13.1ALARMSTATISTICSRESET63
10.13.2ALARMGROUPSETTINGS63
10.13.3INDIVIDUALALARMSETTINGS64
10.14INTERNALMEMORY66
10.14.1MEMORYDIVISION66
10.14.2MEMORYOPERATION66
10.14.3MEMORYCLEARING67
10.15GENERALPURPOSERECORDER68
10.15.1STORAGEINTERVAL68
10.15.2MDTIMECONSTANT68
10.15.3RECORDEDQUANTITIES68

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10.16POWERQUALITYRECORDERREPORT69
10.16.1CONFORMITYOFVOLTAGEWITHEN50160STANDARD69
10.16.2POWERSUPPLYQUALITY70
10.17EN50160PARAMETERSETTINGS72
10.18RESETOPERATIONS73
10.18.1SETENERGYCOUNTERS(E1,E2,E3,E4)73
10.18.2RESETENERGYCOUNTERCOSTS(E1,E2,E3,E4)73
10.18.3RESETMAXIMALMDVALUES73
10.18.4RESETTHELASTMDPERIOD73
10.18.5MDSYNCHRONIZATION74
10.18.6ALARMRELAY–MODULES1&2,OFF74
10.18.7RESETMIN/MAXVALUES74
10.18.8RESETALARMSTATISTICS74
11.SETTINGSANDMEMORYCARD75
12.MEASUREMENTS79
12.1ONLINEMEASUREMENTS79
12.2SELECTIONOFAVAILABLEMEASUREMENTS79
12.3BASICCONCEPTS83
12.3.1SAMPLEFREQUENCY83
12.3.2AVERAGEINTERVAL83
12.3.3POWERANDENERGYFLOW84
12.3.4OPERATINGENERGYQUADRANTS84
12.4CALCULATIONANDDISPLAYOFMEASUREMENTS85
12.4.1PRESENTVALUES85
12.4.2MINIMUMANDMAXIMUMVALUES90
12.4.3ALARMS91
12.4.4HARMONICANALYSIS93
12.4.5POWERQUALITYANALYSIS97
12.4.6PQRECORDS100
12.4.7FLAGGEDDATAEVALUATION102
12.4.8MULTIPHASEEVENTS103
12.4.9EN50160QUALITYREPORTINPDFFORMAT105
13.SUPPORTPOWERFORREALTIMECLOCKOPERATION106
14.TECHNICALDATA107
15.APPENDIXA:COMMUNICATIONS114
15.1COMMUNICATIONSPORTS114
15.2COMMUNICATIONSPROTOCOLS114
15.3COMMUNICATIONSSETUP114
15.4ETHERNET114
15.4.1USINGFIXEDIPADDRESS114
15.4.2LOCALPORT114
16.APPENDIXB1:MODBUSCOMMUNICATIONS115
16.1TRANSACTIONS115

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16.2REQUEST115
16.3RESPONSE115
16.4REQUEST‐RESPONSECYCLEEXAMPLE115
16.4.1REQUESTFRAME116
16.4.2RESPONSEFRAME116
16.5FRAMING116
16.6RTUFRAMING116
17.APPENDIXB2:MODBUSSUPPORTEDFUNCTIONSANDUSAGE117
17.103READFROMHOLDINGREGISTERS117
17.1.1REQUESTFRAME117
17.1.2RESPONSEFRAME117
17.204READFROMINPUTREGISTERS117
17.2.1REQUESTFRAME117
17.2.2RESPONSEFRAME118
17.306WRITETOASINGLEHOLDINGREGISTER118
17.3.1REQUESTFRAME118
17.3.2RESPONSEFRAME118
17.416(10HEX)WRITETOONEORMOREREGISTERS118
17.4.1REQUESTFRAME118
17.4.2RESPONSEFRAME119
17.517(11HEX)REPORTSLAVEID119
17.5.1REQUESTFRAME119
17.5.2RESPONSEFRAME119
18.APPENDIXB3:MODBUSERRORRESPONSES120
18.1EXCEPTIONCODES120
19.APPENDIXB4:MODBUSREGISTERMAPS121
20.APPENDIXB5:MODBUSDATA122
20.1MEASUREMENTS122
20.2MEASUREMENTS(IEEE754)131
20.3BASICPRODUCTSETTINGS134
20.4MODBUSDATATYPES135
21.APPENDIXC:DNP3.0PROGRAMMING137
21.1DNP3.0DEVICEPROFILEDOCUMENT137
21.2DATATYPES–DECODING144
21.3100%VALUECALCULATIONS145
22.APPENDIXD:EQUATIONS146
23.RELATEDDOCUMENTS149

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7. INTRODUCTION
FIGURE 7-1 : M3X5 FRONT AND REAR CASE VIEWS
7.1 General
The M3x5 Quality Analyser is a comprehensive device intended for the permanent
monitoring of power quality from its production (especially renewable), transmission,
distribution to final consumers, who are most affected by insufficient quality of voltage. It is
mostly applicable in medium and low voltage markets.
Lack of information about supplied quality of voltage can lead to unexplained production
problems and malfunction or even damage to equipment used in production processes.
Therefore, the M3x5 can be used for utility purposes (evaluation against standards) as well
as for industrial purposes (e.g. for monitoring supplied power quality).
The M3x5 Power Quality Analyser integrates a number of measurements, monitoring,
recording and metering functions in the same unit for comprehensive power system
management.
The M3x5 offers:
Power Quality measurement to IEC 61000-4-30:2008 Class A
Power Quality analysis to EN50160: 2011
High accuracy measurements (0.1%, 0.2S Energy)
4 voltage and 4 current inputs (including neutral current)
31 kHz sampling (620 s/c @ 50 Hz)
Interharmonics Measurement
Time synchronisation (multiple methods)
Modbus and DNP3(level 1) protocols for integrating into energy management and
control systems on Serial and Ethernet communications channels.
Up to 20 I/O channels and 32 programmable alarms
128 (4 x 32) channel trend recorder and alarm status recorder.
Energy measurement, tariff and cost management functions for use in sub metering
applications.
User friendly configuration, download and analysis software (QDSP2)
A cost-effective solution for Medium and Low voltage and Industrial markets

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The M3x5 uses a software package called QDSP2, v2.0 or later is required for M3x5.
Although basic configuration can be performed via the keypad it is suggested that the
QDSP2 software is used when possible as it provides a simple interface for communicating
with the product. A separate QDSP2 manual is available.
QDSP2 can be used for setting and monitoring all of the iSTAT devices with
communications, i400, i4Mx, i500, M2x1, M2x2, M2x3, and M3x5. It can also be used
off line using a Memory Card to transfer data to and from the device. It is also used to
provide the data logging and Power Quality download and analysis functions required
by M355 and other devices.
QDSP2 also offers additional features such as upgrading from a secure web site for
both the QDSP2 and the devices.
KEY MESSAGES
The iSTAT M3x5 family measures Power Quality parameters in compliance with
IEC61000-4-30:2008 Class A. And performs Power Quality Analysis to
EN50160:2011.
The iSTAT M3x5 family is easy to set and test. In the substation world, more
settings increase the chance of misapplication, and the potential for incorrect settings
and inaccurate measurements. The ISTAT M3x5 minimises the chance of an incorrect
setting by using a setup wizard to help the operator configure the device.
The iSTAT M3x5 offers easy fitting, by using embedded current transformers and a
wrong connection warning for the current circuits. It uses a standard 144mm DIN
case.
The comprehensive Energy Cost Management Library of functions enables the M3x5
to store energy readings in 4 registers and programme tariff structures and costs. This
data can be recorded, communicated or transmitted via pulse outputs.
M3x5 allows connection to MODBUS and DNP3(level 1) based systems that are
widely used by industrial and utility customers worldwide.
The M3x5 family also allows a Memory Card to be used for configuring the meters and
extracting data for post analysis.
iSTAT – THE standard measurement platform
Multiple advanced configuration features fitted as standard.
Comprehensive choice of features for measurement applications – to satisfy all
metering, measurement, data recording and power quality applications
Flexible programmable software (QDSP2) allows off line and on line configuration and
data interpretation
Complete and informative documentation, QDSP2 also includes help information.
A choice of different input and output options.

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7.2 Purpose
The M3x5 Quality Analyser performs measurements in compliance with regulatory standard
IEC 61000-4-30: 2008 and evaluates recorded parameters for analysis according to the limit
values defined in European supply quality standard EN 50160:2011. The limit values can be
modified to match the requirements of the customer.
Moreover the M3x5 stores measurements and quality reports in internal memory for further
analysis of recorded measurements. From multiple devices installed in different locations,
the user can gain the overall picture of the system behaviour. This can be achieved with
respect to its accurate internal real time clock and the wide range of time synchronization
sources supported, which ensure accurate, time-stamped measurements from dispersed
units.
All required measurements, weekly PQ reports and alarms can also be stored locally in the
internal memory. Stored data can then be transferred to a memory card or accessed
through communication for post analysis.
The internal memory capacity allows the storing of more than 170,000 variations of the
measurements from the standard values, which allows the eventual reasons for the
problems in the network to be found. The limits and the required quality in a monitored
period can be defined for each monitored characteristic.
7.3 Family
The iSTAT M3x5 family provides:
M355 is a class 0.1 communicating Power Quality Analyser that meets Class A to
IEC61000-4-30:2008. The M355 also includes a tariff structure, alarm indication, 0.2S
energy measurement function and a range of communications and input/output
options.
Others to be defined.
Software:
QDSP2 for setting, monitoring, recording and Power Quality application software.
7.4 QDSP2
The QDSP2 software is used for configuring the M3x5. Additionally it can be used to obtain
and display many real time measurements in graphical or tabular form. QDSP2 also
configures the data and power quality recorders and is used to download and display the
recorded data.
A separate manual is available for QDSP2 which describes its operation and all of the
features.

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7.5 Measurements
The M3x5 family is ideally suited to applications where continuous Power Quality monitoring
is required.
TABLE 7-1 summarises the measurements available. The M3x5 can be user configured for
either single or three phase connection.
TABLE 7-1 : MEASUREMENTS M3x5
V, I, P, Q, S, PF, PA, F, 
Energy kWh class 0.2S 
Maximum demand 
Minimum values: V, I, P, Q, S, PF, PA, F, 
Maximum values: V, I, P, Q, S, PF, PA, F, 
THD (actual, min, max) 
Harmonics (up to) 63rd
Flicker, voltage fluctuations, Interharmonics 
7.6 Hardware features
The M3x5 family has a number of hardware features that are designed to make the
installation, commissioning and use of the meters as simple as possible, see TABLE 7-2.
It has a large 128 x 64 pixel Liquid Crystal Display (LCD) that can display information in a
number of different font sizes and is backlit for use in conditions with a low light level. The
menu is driven locally by a 5 key function pad on the front of the meter and the M3x5 family
has the ability to customise the display and key functions to enable the user to retrieve
information as quickly as possible.
The M3x5 has 3 LED indicators that indicate the status for a number of functions; Steady
RED for Memory Card activity; blinking GREEN for communications activity and blinking
RED for an alarm condition.
The M3x5 has an auto ranging current and voltage measurement inputs so that it can be
used in most site conditions without the need to specify connection information at the order
stage.
The M3x5 has 8 energy counters and a real time clock so that it supports comprehensive
energy management applications.
The M3x5 has 8MB of internal memory to support the data recording and Power Quality
Analysis functions.
The M3x5 supports a Memory Card with capacity up to 2GB which is used to transfer
settings and extract records from the M3x5. This means that the M3x5 can download Power
Quality records and have settings made off line and up/downloaded via a Memory card using
the front card access port. The slot is protected by a cover to prevent humidity and dust
ingress.

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TABLE 7-2 : HARDWARE M3x5
Time synchronisation 
Large backlit LCD 128 x 64 
LED alarm indication 
5 key menu 
Autorange V&I input 
Power supply universal AC/DC
(2 ranges High/Low) 
Watchdog (optional) 
8 Energy counters 
Real time clock 
Internal Flash Memory 8MB
Memory card 
7.7 Communication and inputs/outputs
The M3x5 family has a wide range of communications options that allow it to integrate with a
number of different management systems, see TABLE 7-3.
The M3x5 has the option of an RS232/RS485 wired port, USB port or an RJ45 Ethernet port
that will support MODBUS or DNP3. In addition a second RS232/RS485 port is available if it
is not used for communicating with a GPS modem.
The M3x5 family has a front port supporting Memory Cards so that settings and records can
be extracted locally from the meter. It can also be used to upgrade the firmware of the M3x5.
The M3x5 has four hardware modules on the rear, 2 of which can support 2 inputs or outputs
and 2 which can support 8 inputs or outputs as shown in table 7-3. Each module
configuration is specified at the order stage and they are independent of each other.
TABLE 7-3 :
COMMUNICATIONS M3x5
Memory Card port 
RS232/RS485, USB or Ethernet 
Second RS232/RS485 for
communications with GPS
modem or general usage

Modbus RTU, TCP and DNP3 
2x energy pulse contacts 
2x tariff inputs 
2x alarm contacts 
2x analogue outputs 
1x Watchdog & 1x alarm
contact 
2x digital inputs 
2x analogue input 
8x digital inputs 
8x digital outputs 

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7.8 User features
The M3x5 family has a wide range of user features that are designed to make the installation
and commissioning simple. These features are summarised in TABLE 7-4 .
The Setup Wizard takes the user through the basic settings required to commission the
M3x5. The benefit of the wizard is that it leads the commissioning engineer through all the
basic settings required to install the M3x5 ensuring that the M3x5 is correctly setup. This is
fully detailed in section 9.3.
The M3x5 will monitor the voltage and current polarity and when it detects that an input has
been incorrectly connected it will display a warning symbol on the display. This is useful
when direction is important, such as in energy applications, to ensure that the values
calculated are correct.
The M3x5 provides over 140 different measurements that the operator can scroll through
and read on the display. If the operator only wants to see a small number of measurements,
they can configure the display to show up to 3 customised screens. The refresh time is
programmable to allow the operator time to interpret the information on the display.
To demonstrate the different display options that are available, the M3x5 has a demo option
which will display each of the different screens available. The refresh time is programmable
so that the operator is given time to interpret the information shown.
TABLE 7-4 : USER FEATURES M3x5
Set up Wizard 
Wrong connection warning 
3 Custom screens 
Reset default settings 
Demonstration screens 
Settable refresh times 
7.9 Applications
The M3x5 family can be used in a wide range of different applications that are summarised
in TABLE 7-5.
TABLE 7-5 : APPLICATION M3x5
Power measurements 
Energy Metering 
Cost Management 
Programmable alarms 
Measurement recorder 
Quality of supply 
Power Measurements: The M3x5 family provide a wide range of instantaneous analogue
values; voltage, current, power, phase angle, power factor and frequency. These are
available locally on the M3x5 family and remotely. The M3x5 therefore replaces a number of
separate instruments and is ideally suited to ac switchboard applications.
Energy and sub Metering: With the addition of 4 quadrant energy measurement, the M3x5
can be used in sub metering applications were information is passed to an energy
management system to monitor the performance of the ac power system. Depending on the
M3x5 I/O options selected, the M3x5 can use a combination of pulsed energy contacts,
analogue tariff inputs and communications to integrate with and provide this data to the
control system.

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In addition, measurements such as maximum and minimum values and maximum demand
information provide valuable information on the operation of plant and system monitoring to
ensure that it performing correctly.
Cost Management: The real time clock and a tariff structure means that the M3x5 can be
used in stand-alone tariff or revenue sub metering applications. This allows the energy
consumed to be given a financial cost that can vary depending on the time of day and
season of the year. This provides information on the cost of plant operation and can be used
to ensure that equipment and processes are used in the most financially efficient manner.
Measurement Recorder: The M3x5 has 4 independent data recorders that provide trending
information on up to 128 different analogue values. The status of all 32 software alarms can
also be recorded within the data recorder. This provides a comprehensive record of the
status of the monitoring system and a timed record of events.
Quality of supply: The M3x5 provides quality of supply measurement which complies with
IEC 61000-4-30:2008 Class A and analysis that complies with the European standard
EN50160:2011. This power quality standard is used to monitor electrical systems and ensure
that it falls within a number of different limits, ensuring that the user has the required
electricity supply quality. The EN50160 standard monitors the following electrical
characteristics:
Phenomena PQ Parameters
Frequency variations Frequency distortion
Voltage variations Voltage fluctuation
Voltage unbalance
Voltage changes Rapid voltage changes
Flicker
Voltage events Voltage dips
Voltage interruptions
Voltage swells
Harmonics & THD THD
Harmonics
Inter-harmonics
Signalling voltage

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8. HARDWARE
8.1 Front panel
FIGURE 8-1: M3X5 FRONT PANEL FEATURES
Graphical LCD: A graphical LCD with back light is used for high resolution display of
measured quantities and for the display of selected functions when configuring the device.
Programming Keypad: The "OK" key is used for confirming the settings, selecting and
exiting the displays. Direction keys are used for shifting between screens and menus.
Memory card slot: A slot is provided for a full size SD (or MMC) card that is used for data
transfer from the internal memory, device setting and software upgrading. A protection cover
over the slot prevents the penetration of humidity and dust into the device.
LED indicators: There are two types of LED indicators positioned on the front panel.
General operation LED indicators and I/O status LED indicators.
General operation LED indicators warn of a certain state of the device. A left (red)
indicator indicates the memory card activity and that it should not be pulled out. A
middle (green) one is blinking when transmitting data via communications. A right
(red) one is blinking when the condition for an alarm is fulfilled.
I/O state LED indicators are in operation when additional Modules A and/or B are built
in and they have functioning Digital input or Relay output. They indicate the state of
a single I/O. Red LED is lit when:
oRelay output is activated
oSignal is present on Digital input