Cable SizingPart 2

by febriansasi at gmail dot com

Cable Sizing

• Standard in my country using IEC standard– Metric– 50Hz

Pick any cable from library

Pick any cable from library

Tick Load Amp to use standard cable ampacityIt means ETAP will select based on load FLA witho

ut concern with Voltage drop

Tick Vst Min to use calculated Voltage Start MinimumIt means ETAP will select based on Voltage Drop when Sta

rting Motor

Tick Short Circuit use calculated current withstandIt means ETAP will select based on shortcircuit current (we

will discuss later after I study about this)

Tick Short Circuit use calculated current withstandIt means ETAP will select based on shortcircuit current (we

will discuss later after I study about this)

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)

Tick Load Amp and Vst to combine the calculationIt means ETAP will select based on FLA and Voltage start

Load Flow

Change The cable sizing calculation

Using Motor starting simulation to calculate VstAs we can see, even we set the Vst to 95% the result is 86.5%

Using Motor starting simulation to calculate Vd Max

Motor reactive power demand

Motor real power demand

Bus voltage

Motor current

Thank You