Siemens SMART 7KT User manual

1
SMART 7KT0310 Manual
MANUAL
SMART KT
Multifunction meter
7KT0310
SMART 7KT power monitoring devices

2
SMART 7KT0310 Manual
1. Introduction 3
2. Safety precautions 4
3. Technicalspecication 5
4. Installation 7
5. Connection 9
6. Conguration 10
7. Communication 14
8. Maintenance 19
SMART 7KT
Multifunction meter
7KT0310
Manual
Index
01/2022
SME7KT03100122

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SMART 7KT0310 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
4nos.TerminalClamps RubberGasketx1

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SMART 7KT0310 Manual
Safety
precautions 
Pleasereadandunderstandtheseinstructionsbeforeinstalling,operating,ormaintainingtheequipment.
DANGER
Hazardousvoltage.Willcausedeathorseriousinjury.Turnoffandlockoutallpower
supplytothisdevicebeforeworkingonthisdevice.
Replaceallcoversbeforepowersupplyingthisdeviceisturnedon.
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 7KT0310 Manual
Technical
specification 
Display
Typeandspecics • LargebacklitLiquidCrystaldisplay
• 4Lineswith4digitseachtoshowmeasuredvalues
• 5thLinewith8digitstoshowenergyvalues
• Graphforcurrentloadingindication
Sizeofdisplay(mmxmm) 60.3mmx60.3mm
LCDIndications
I
 Integrationofenergy
PRG Unitisincongurationmenu
 Communicationinprogress
MAX DMD MaximumandMinimumDemandPower
Display update time 1 sec. for all parameters
Displayscrolling AutomaticorManual(Programmable)
Passwordprotected Yes
Wiring input 3Ø-4wire,3Ø-3wire,1Ø-2wire
Measuring inputs
Ratedinputvoltage 11to300VAC(L-N);19to519VAC(L-L);InstallationCategoryIII(600V)
Frequencyrange 45-65Hz
Rated input current Nominal1A/5AAC(Min-11mA,Max-6Afor5A)
Auxiliary supply 95Vto240VAC,±10%,50/60Hz(±5%)
Memory (behaviour in the event of power
failure)
Retainsallenergyvalues,Onhourscountervalueandcongurationsettingsincaseof
powerfailure
CT/PT Settings
CTType MeasurementC.T,FS10
CTPrimary 1A/5Ato10,000A(ProgrammableforanyValue)
• 1Ato10,000AwhenCTsecondaryis1
• 5Ato10,000AwhenCTsecondaryis5
CTSecondary 1Aor5A(Programmable)
Burden 0.5VA@5Aperphase
PTPrimary 100Vto500kV(Programmableforanyvalue)
PTSecondary 100Vto500VAC(L-L)(Programmableforanyvalue)
Power consumption Lessthan8VA
Environmental conditions • Temperature(Operating):-10°Cto55°C
• Temperature(Storage):-20°Cto75°C
• Humidity:Upto85%non-condensing
• Altitude:ofupto2000meters
• Indooruse
• PollutiondegreeII
Mounting Panel-doormounting
Protection Class II
Degree of protection according to IEC 60529 Front:IP65(whenmountedonthepaneldoor)
Rear:IP20
Overvoltage Category III
Dimensions and weight LxBxD:96x96x55mm
Weight:360gms
Digital Input
Number 1
Inputvoltage Maximuminputvoltage:28VDC
Switchingthresholdforsignal"1“>__VDC
Input current Forsignal“1”:typ__mA

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SMART 7KT0310 Manual
Measured variables
Measured variable On display On communication
VoltageVL-N,VL-L ● ●
Current ● ●
Neutralcurrent ● ●
Frequency ● ●
Powerfactor ● ●
Activepower ● ●
Reactivepower ● ●
Apparentpower ● ●
Activeenergy(Import,Export,Total) ● ●
Reactiveenergy(Import,Export,Total) ● ●
Apparentenergy ● ●
Maxdemand(current)oversetdemandperiod ● ●
Maxdemand(active,reactiveandapparentpower)oversetdemand
period
● ●
Phaseangleof3phases ●–
THD%(Current) ● ●
THD%(Voltage) ● ●
Individualharmonics(Current) –●
Individualharmonics(Voltage) –●
–:Notthere
●:Available
Measuring accuracy
Measured variable Error limits
VoltageVL-N 0.5%ofFullscale(300VAC)
VoltageVL-L Fullscale0.5%
Current PhaseCurrent:0.5%offullscale
Neutralcurrent:1%offullscale
Frequency 0.1%
ForL-NVoltage>20V,
ForL-LVoltage>35V
Powerfactor 0.01Digit
Activepower 1%
Reactivepower 1%
Apparentpower 1%
Activeenergy Class1(asperIEC62053-21)
Reactiveenergy Class2(asperIEC62053-23)
Apparentenergy 1%
Phaseangleof3phases 1%
THD(Current) 1%
THD(Voltage) 1%
Harmonics(Current) 1%
Harmonics(Voltage) 1%
Whenmeasuringonexternalcurrenttransformersorvoltage
transformers,theaccuracyofthemeasurementdependsonthe
qualityofthetransformer.
IEC Standards
Description Standard
Energyaccuracy IEC62053-21|Activeenergy
EMCrequirements IEC61326-1:2012
Degreeofprotectiontest(IP) IEC60529
Safetyrequirements IEC61010-1:2010and
IEC61010-2-030:2010
Vibrationandmechanicalshock IEC62052-11
Certications
SMART7KTmultifunctionmeterconformstoIEC
standards,IPCelectronicsassemblystandardand RoHS

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SMART 7KT0310 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)
90.5
50
96
596
91.5
91.5
1. Insert unit into the panel 2. Positiontheclamps(asshowninthe
gure)andpushthesameintotheslots
intheirrespectivelocations.
3. Push/Slideall4clampstowardsthepanel
evenlytillthelowestpossibletoothof
theclampisengaged.Ensure the meter
is properly tightened and it does not
move.
PANEL
GASKET
UNIT
1
2
3
4
Base clamp
position
Base clamp
position
SLIDING
CLAMP
SLIDING
CLAMP
Note:Terminalscrewtighteningtorque:0.7N-mto0.8N-m(6In-Lbto7In-Lb)
Thedistancetobemaintainedbetweentwometerswhile
mountingonapaneldoorshouldbeatleast100mm.
100 mm
100 mm 100 mm
100 mm
Mounting distance

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SMART 7KT0310 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rating275VAC/0.5Amp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1mm2to2.5mm2.Thesewiresshallhave
currentcarryingcapacityof6A.
7. Coppercableshouldbeused(StrandedorSinglecorecable).
For demounting the meter
Pullthearmoftheslidingclampsin
outwarddirection(oppositetometer)and
dragtheslidingclampsawayfromthe
panel.
Dis-assemblethesnapttedbaseclamps
fromthemeterusingascrew-driver
Pushthemeterfrombacksideoutofthe
panelwindowandremovethegasketfrom
the meter
Sliding Clamps
X 4nos.
Base Clamps
X 4nos
Mete
r
Gasket
Panel

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SMART 7KT0310 Manual
Connection 
N
S2S1S2S1S2S1 V1
N
L
O
A
D
I1
V2 V3
L1
L2
L3
I 2 I 3
DI
L
N
+
RS485
+
CONNECTIONS DIAGRAM
3 Phase 4-Wire (commonly used)
3Ø-4Wire,3CT’S 3Ø-4Wire,3CT’Sand3PT’S
S2S1 S2S1 S2S1 NV2V3
LOADLINE
L1
L2
L3
N
I1I2I3
V1
#
DI RS485
L
N
LN
#
++
+
SMART7KT
Voltageupto 500V without PT
LINE
DI RS485
L
N
LN
#
LOAD
L1
L2
L3
N
#
S2S1 S2S1 S2S1 NV1V2V3
I1I2I3
++
+
SMART7KT
Voltage 100V-500kV withPT
Circuit Diagram

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SMART 7KT0310 Manual
3 Phase 3-Wire
3Ø-3Wire,2CTsand2PTs
1 Phase 2-Wire
1Ø-2Wire,1CT
S2S1 S2S1 S2S1 V1NV2V3
LOADLINE
L1
L2
L3
I1I2I3
#
DI RS485
L
N
LN
#
+
+
SMART7KT
S2S1 S2S1 S2S1 V1NV2V3
LOADLINE
L1
N
I1I2I3
#
DI RS485
L
N
LN
#
+
+
SMART7KT
Circuit Diagram (Continued)
#AllFuseType:0.5A,ClassgG