2-8
IM WT310E-01EN
Checking a Range
Tocheckthecurrentlysetrangeduringmeasurement,pressVOLTAGEorCURRENT.Thesetrange
will appear on the display.
To return to the measured value display in menu configuration mode, press the same key again. In
quick configuration mode, the range is only displayed for the duration of the data update interval before
the measured value display is restored.
Measured value display Measured value display
Power Range
The measurement range (power range) for measuring active power, apparent power, and reactive
power is determined as indicated below in accordance with the wiring system, voltage range, and
current range.
Wiring System Power Range
1P2W (single-phase, two-wire) Voltagerange×currentrange
1P3W (single-phase, three-wire)
Voltagerange×currentrange×23P3W (three-phase, three-wire)
3V3A(three-voltage,three-currentmethod)
3P4W (three-phase, four-wire) Voltagerange×currentrange×3
• Themaximumdisplayis99999(whenthenumberofdisplayeddigitsissetto5).
• Whentheresultofmultiplyingthevoltagerangebythecurrentrangereachesorexceeds1000
W, the unit on the display will change to “kW.” When the result exceeds 1000 kW, the unit on the
display will change to “MW.”
• Forspecificvoltageandcurrentrangecombinationsandpowerrangevalues,seeappendix3.
Note
• Inautorangemode,becausethevoltageandcurrentrangesswitchindependentlyaccordingtorange
increase and decrease conditions, different power ranges may be set for the same measured or computed
power value.
• Ifyouopenthevoltageinputterminal,avoltagevalueofupto0.3Vmaybedisplayedduetohumnoise
atthepowerlinefrequencyof50Hzor60Hzandotherphenomena.Thisisbecauseofthehighinput
resistanceofthevoltageinputterminal.Shortingtheterminalwillresultinavalueof0V.
2.3 Setting the Measurement Range When Using Direct Input
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