Siemens SMART 7KT0311 User manual

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SMART 7KT0311 Manual
MANUAL
SMART KT
Multifunction meter
7KT0311 (LCD Class 0.5s)
SMART 7KT power monitoring devices

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SMART 7KT0311 Manual
1. Introduction 3
2. Safety precautions 4
3. Technicalspecication 5
4. Installation 8
5. Connection 11
6. Conguration 13
7. Communication 29
8. Maintenance 35
SMART 7KT
Multifunction meter
7KT0311 (LCD Class 0.5s)
Manual
Index
09/2022
SME7KT031100

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SMART 7KT0311 Manual
Introduction 
1.1 Purpose of this document
This present manual describes the SMART 7KT multifunction meter.
It is intended for the use of:
• Planners
• Plantoperators
• Commissioningengineers
• Serviceandmaintenancepersonnel
1.2 Required basic knowledge
Ageneralknowledgeoftheeldofelectricalengineeringisrequiredtounderstandthismanual.
Knowledgeoftherelevantsafetyregulationsandstandardsisrequiredforinstallingandconnectingthedevice.
1.3 Components of the product
The carton for the products contain
1 SMART 7KT meter
1setofclamps(4clamps)formountingthemeteronthepaneldoor
1Gasket
1Operatinginstruction
Gasket1xnos.Unit1xnos. Baseclamp4xnos.
Slidingclamp4xnos.

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SMART 7KT0311 Manual
Safety
precautions 
DANGER
Hazardous voltage will cause death or serious injury.Turnoffandlockoutall
powersupplybeforeworkingonthisdevice.
NOTICE
Installationandmaintenancemustbecarriedoutbyqualied
personnel.
ThisproducthasbeendesignedforenvironmentA.Use
ofthisproductinenvironmentBmaycauseunwanted
electromagneticdisturbancesinwhichcasetheusermay
requiretotakeadequatemitigationmeasures.
Risk of damage: Please ensure the proper isolation of meter
during the IR (Meggering) test.
Allsafetyrelatedcodications,symbolsandinstructionsthatappearinthisoperatingmanualorontheequipment
mustbestrictlyfollowedtoensurethesafetyoftheoperatingpersonnelaswellastheinstrument.Iftheequipmentis
notusedinamannerspeciedbythemanufactureritmightimpairtheprotectionprovidedbytheequipment.
Donotusetheequipmentifthereisanymechanicaldamage.
Ensurethattheequipmentissuppliedwithcorrectvoltage.
CAUTION:
1. Read complete instructions prior to installation and operation of the unit.
2. Riskofelectricshock.
3. Theequipmentinitsinstalledstatemustnotcomeincloseproximitytoanyheatingsources,oils,steam,
causticvaporsorotherunwantedprocessbyproducts.

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SMART 7KT0311 Manual
Technical
specification 
7KT0311 (LCD Class 0.5s)
PowerMonitoringDevicepanelinstrumentforstandardelectrical
values;Protocol:ModbusRTU;LCDdisplayVaux:95Vto240VAC
x/1or5A;Class0.5s
Measurements
measuringprocedure
•forvoltagemeasurement True RMS
•forcurrentmeasurement True RMS
typeofmeasuredvaluedetection complete
voltagecurve sinusoidal or distorted
measurablelinefrequency
•initialvalue 45 Hz
•full-scalevalue 65 Hz
operatingmodeformeasuredvaluedetectionautomaticlinefrequency
detection
Yes
Supply voltage
designofthepowersupply SMPSpowersupply
typeofvoltageofthesupplyvoltage AC
Degree of protection class
protectionclassIPonthefront IP65
protectionclassIPoftheterminal IP20
Suitability
suitability for operation Installation in stationary panels in closed rooms
Product Functions
product function
•voltagemeasurement Yes
•currentmeasurement Yes
•activepowermeasurement Yes
•reactivepowermeasurement Yes
•Apparentpowermeasurement Yes
•powerfactormeasurement Yes
•frequencymeasurement Yes
•apparentenergy/activeenergy/reactiveenergy Yes
•%TotalHarmonicsDistortion(THD)measurementforvoltageand
current
Yes
•powerdemandmeasurement Yes
Display and operation
designofthedisplay LCDwithgraphicaldisplayofcurrentloading
heightofthedisplay 60 mm
widthofthedisplay 60 mm
colorofthebackgroundofthedisplay White
time-controlledreductionoftheilluminanceofdisplaybacklightpossible Yes. up to 2 Hrs. (7200 sec)
languageonthedisplayscreenissupported EN
numberofkeys 4
Accuracy
referenceconditionformeteringaccuracy InaccordancewithIEC61557-12,IEC62053-22,IEC62053-23
formulaforrelativetotalmeasurementinaccuracy
•formeasuredvariablevoltage Class0.5asperIEC61557-12
•formeasuredvariablecurrent Class0.5asperIEC61557-12
•formeasuredvariableapparentpower Class1asperIEC61557-12
•formeasuredvariableactivepower Class1asperIEC61557-12
•formeasuredvariablereactivepower Class2asperIEC61557-12
•formeasuredvariablepowerfactor Class1asperIEC61557-12
•formeasuredvariableactiveenergy Class0.5asperIEC61557-12andClass0.5sasperIEC62053-22
•formeasuredvariablereactiveenergy Class2asperIEC61557-12andIEC62053-23

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SMART 7KT0311 Manual
7KT0311 (LCD Class 0.5s)
Inputs Outputs
numberofdigitalinputs 1
typeofelectricalconnectionatthedigitalinputs screw-typeterminals
operatingconditionsfordigitalinputsexternalvoltagesupply Yes
inputvoltageatdigitalinputatDCmaximum 30V
inputcurrentatdigitalinputinitialvalueforsignal<1>-recognition 10 mA
numberofdigitaloutputs 1
typeofswitchingoutput Unidirectional
digitaloutputversion switchingorpulseoutputfunction
operatingvoltageasoutputvoltageatDCmaximumpermissible 30V
typeofelectricalconnectionatthedigitaloutputs screw-typeterminals
outputcurrentatthedigitaloutputsatDClimitedto100msmaximum 130 mA
internalresistanceatthedigitaloutputs 55Ω
standard for pulse emitter accordingtoIEC62053-31
pulse duration
•initialvalue 100 ms
•full-scalevalue 2 s
adjustable time period minimum 100 ms
switchingfrequencyatdigitaloutputmaximum 17 Hz
Measuring inputs
measurablesupplyvoltagebetweenLandNatACmaximumratedvalue 240V
measurablesupplyvoltagebetweenLandNatAC
•minimum 11V
•maximum 300V
measurablesupplyvoltagebetweenthelineconductorsatACmaximum
ratedvalue
415V
measurablesupplyvoltagebetweenthelineconductorsatAC
•minimum 19V
•maximum 519V
voltagemeasuringrangeextensionwithexternalvoltagetransformers upto500kV
lineconductorsandneutralconductorsinternalresistanceforvoltage
measurement
1.12MΩ
measuringcategoryforvoltagemeasurement CAT III
measurable current 1A / 5A
relativemeasurablecurrentatAC
•minimum 1%
•maximum 120%
currentmeasuringrangeextensionwithexternalcurrenttransformers upto10kA
measuringcategoryforcurrentmeasurement CAT III
Connections
type of electrical connection
•atthemeasurementinputsforvoltage screw-typeterminals
•atthemeasurementinputsforcurrent screw-typeterminals
Mechanical Design
mounting ushpanel-doormounted
sizeofPowerMonitoringDevice size 96
height 96 mm
width 96 mm
Cut-out 91.5mmx91.5mm
depth 55 mm
installation depth 51 mm
netweight 325g
Environmental conditions
ambienttemperatureduringoperation
•minimum -10°C
•maximum 55°C
ambienttemperatureduringstorage
•minimum -20°C
•maximum 75°C
relativehumidityat25°Cwithoutcondensationduringoperation
maximum
85%
installationaltitudeatheightabovesealevelmaximum 2 000 m
degreeofpollution 2

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SMART 7KT0311 Manual
Measured variables
Measured variable On display On communication
VoltageVL-N,VL-L Yes Yes
Current Yes Yes
Neutral Current Yes Yes
Frequency Yes Yes
PowerFactor Yes Yes
ActivePower Yes Yes
ReactivePower Yes Yes
ApparentPower Yes Yes
ActiveEnergy(Import,Export,Total) Yes Yes
ReactiveEnergy(Import,Export,Total) Yes Yes
ApparentEnergy Yes Yes
MaxDemand(Current)oversetdemandperiod Yes Yes
MaxDemand(Active,Reactive,ApparentPower)oversetdemandperiod Yes Yes
MinDemand(Active,ReactivePower) Yes Yes
PhaseAngleof3phases Yes No
THD%voltage Yes Yes
THD%current Yes Yes
Individualharmonics(current) No Yes
Individualharmonics(voltage) No Yes
TotalActiveEnergy(DI) Yes Yes
TotalReactiveEnergy(DI) Yes Yes
TotalApparentEnergy(DI) Yes Yes
OldActiveEnergy Yes Yes
OldReactiveEnergy Yes Yes
OldApparentEnergy Yes Yes
On Hours Yes Yes
Phasesequenceindication No Yes
Certications
SMART 7KT multifunction meter conforms to IEC
standards,IPCelectronicsassemblystandardand RoHS
IEC Standards
Description Standard
Accuracy IEC61557-12,IEC62053-21|
Activeenergy
EMCrequirements IEC61326-1
Degreeofprotectiontest(IP) IEC 60529
Safetyrequirements IEC61010-1and
IEC61010-2-030
Vibrationandmechanicalshock IEC62052-11

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SMART 7KT0311 Manual
Assembly 
Installation
For installing the meter
Preparethepanelcutoutwithproperdimensionsasshownbelow.
FRONT PANEL DESCRIPTION OUTLINE
Dimensions (in mm)
PANEL CUTOUT
Dimensions (in mm)

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SMART 7KT0311 Manual
Installation Guidelines
1. Thisequipment,beingbuilt-in-type,normallybecomesapartofmaincontrolpanelandinsuchcasetheterminals
donotremainaccessibletotheenduserafterinstallationandinternalwiring.
2. Conductorsmustnotcomeincontactwiththeinternalcircuitryoftheequipmentorelseitmayleadtoasafety
hazardthatmayinturnendangerlifeorcauseelectricalshocktotheoperator.
3. Circuitbreakerormainsswitchmustbeinstalledbetweenpowersourceandsupplyterminalstofacilitate
power‘ON’or‘OFF’function.Howeverthisswitchorbreakermustbeinstalledinaconvenientpositionnormally
accessible to the operator.
4. Beforedisconnectingthesecondaryoftheexternalcurrenttransformerfromtheequipment,makesurethatthe
currenttransformerisshortcircuitedtoavoidriskofelectricalshockandinjury.
5. Theequipmentshallnotbeinstalledinenvironmentalconditionsotherthanthosementionedinthismanual.
6. Theequipmentdoesnothaveabuilt-in-typefuse.Installationofexternalfuseof0.5A,ClassgGtypeforelectrical
circuitryishighlyrecommended.
7. Removethescratch-guardfromthemeterdisplayduringcommissioningofthepanel.
Wiring Guidelines
1. Topreventtheriskofelectricshock,powersupplytotheequipmentmustbekeptOFFwhiledoingthewiring
arrangement.
2. Wiringshallbedonestrictlyaccordingtotheterminallayout.Conrmthatallconnectionsarecorrect.
3. Useluggedterminals.
4. Toreduceelectromagneticinterferenceuseofwireswithadequateratingsandtwistsofthesameinequalsize
shallbemadewithshortestconnections.
5. LayoutofconnectingcablesshallbeawayfromanyinternalEMIsource.
6. Cableusedforconnectiontopowersource,musthaveacross-sectionof1mm2to 2.5mm2.Thesewiresshallhave
currentcarryingcapacityof6A.
7. Coppercableshouldbeused(StrandedorSinglecorecable).

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SMART 7KT0311 Manual
For demounting the meter