Cable sizing part 2
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Transcript of Cable sizing part 2
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Cable SizingPart 2
by febriansasi at gmail dot com
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Cable Sizing
• Standard in my country using IEC standard– Metric– 50Hz
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Pick any cable from library
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Pick any cable from library
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Tick Load Amp to use standard cable ampacityIt means ETAP will select based on load FLA witho
ut concern with Voltage drop
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Tick Vst Min to use calculated Voltage Start MinimumIt means ETAP will select based on Voltage Drop when Sta
rting Motor
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Tick Short Circuit use calculated current withstandIt means ETAP will select based on shortcircuit current (we
will discuss later after I study about this)
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Tick Short Circuit use calculated current withstandIt means ETAP will select based on shortcircuit current (we
will discuss later after I study about this)
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Tick MF (multiplication factor)It means ETAP will select based on multiplication factor regarding with the application (we will discuss later after I stud
y about this)
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Tick Load Amp and Vst to combine the calculationIt means ETAP will select based on FLA and Voltage start
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Load Flow
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Change The cable sizing calculation
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Using Motor starting simulation to calculate VstAs we can see, even we set the Vst to 95% the result is 86.5%
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Using Motor starting simulation to calculate Vd Max
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Motor reactive power demand
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Motor real power demand
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Bus voltage
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Motor current
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Thank You