This is the 2nd part of cable sizing in ETAP. Still many to learn.

1. Cable Sizing
Part 2
by febriansasi at gmail dot com

2. Cable Sizing
• Standard in my country using IEC
standard
– Metric
– 50Hz

3. Pick any cable from library

4. Pick any cable from library

5. Tick Load Amp to use standard cable ampacity
It means ETAP will select based on load FLA
without concern with Voltage drop

6. Tick Vst Min to use calculated Voltage Start Minimum
It means ETAP will select based on Voltage Drop when
Starting Motor

7. Tick Short Circuit use calculated current withstand
It means ETAP will select based on shortcircuit current (we
will discuss later after I study about this)

8. Tick Short Circuit use calculated current withstand
It means ETAP will select based on shortcircuit current (we
will discuss later after I study about this)

9. Tick MF (multiplication factor)
It means ETAP will select based on multiplication factor
regarding with the application (we will discuss later after I
study about this)

10. Tick Load Amp and Vst to combine the calculation
It means ETAP will select based on FLA and Voltage start

11. Load Flow

12. Change The cable sizing calculation

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

14. Using Motor starting simulation to calculate
Vd Max

15. Motor reactive power demand

16. Motor real power demand

17. Bus voltage

18. Motor current

19. Thank You