XITRON XT2640 - Ch ) or 3 Ø 4 W Wiring Using Internal Current Measurement

XT2640OperatingManual 13July2016 Page25of187
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9.6 3Ø3W(3CH)OR3Ø4W WIRINGUSINGINTERNALCURRENTMEASUREMENT
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CAUTION:
 FORUSEWITHSH,SD,AH,AD,LH,LD,WHORWDCHANNELSONLY
 DONOTCONNECTWIRINGWHILEVOLTAGEPRESENT.
 ENSUREWIRINGISCORRECTBEFOREAPPLYINGVOLTAGE.
 DONOTPASSLOADCURRENT>2ArmsWITHTHEXT2640TURNEDOFF.
WIRING:
 Thickerconnectionsarecurrentcarrying.Ensurewireusedisratedforthemaximumvoltageandcurrenttobe
encountered.
 Thinnerconnectionsarenotcurrentcarrying.Ensurewireusedisratedforthemaximumvoltagetobeencountered.
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Phasesareshownfordescriptivepurposes,theXT2640placesnorelianceontheactualphasinghoweverusingthose
shownensuresthattheXT2640displaymatchestheactualphasingifthechannelshaveincreasingchannelnumbersfrom
lefttorightinthediagramabove.
 Thewiringconnectionsshownaboveensurethebestoverallsystemaccuracyinmostcircumstances,measuringthe
voltageatthesourceandtheloadcurrent.Forapplicationsrequiringaccuratemeasurementsofthepowertotheloadand
usinglowvoltages(<50V)andhighcurrents(>1A)changetheREDV+terminalconnectionstothatoftherespectiveBLUE
A‐terminalinsteadoftheYELLOWA+terminalshownabove,thisensuresthatthevoltagedropacrosstheAterminalsdoes
notaffecttheVmeasurement,attheexpenseofthecurrentandpowermeasurementsincludingthecurrentandpower
drawnbytheVinput(whichmaybeadjustedforbyusingtheADJUSTsettingintheMEASCONFIGscreen).
XT2640CONFIGURATION:
 IntheXT2640MEASCONFIGmenuyoushouldsetSCALEforthechannelstoOFF.
 ForeitherconnectionmethodyoumayusetheADJUSTsettingintheMEASCONFIGmenutosettheXT2640toadjustthe
signalsfortheconnectionmethodandwhethersourceorloadresultsarerequired.
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A
V
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XT2640
C
H
øA
From
SOURCE
N
From
SOURCE
øA
To
LOAD
A
V
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XT2640
CH
øB
From
SOURCE
øB
To
LOAD
A
V

XT2640
C
H
øC
From
SOURCE
øC
To
LOAD
N
To
LOAD
For 3ø3w(3ch) only
Each V- terminal is connected together as shown but there is no N
SOURCE or LOAD connection. The V- terminals may optionally be
grounded