Hi(adsbygoogle = window.adsbygoogle || []).push({});

I'm trying to calculate the power loss over an electrical cable.

The information of the system is:

Maximum current of20.92 Aper unit at34.5kV

The cable has the following properties:

DC Resistance at 25 deg C (0.1672ohms/1000 ft)

AC Resistance at 25 deg C (0.1672ohms/1000ft)

The length of the cable is47370.1ft

The technical report paper I got the calculation from gives the maximum losses in the cable as10398.8W

So far I haven't been able to get the same answer using P=I^2*R where R is the impedance of the cable R=sqrt(0.1672^2+0.1672^2)=0.2365 ohms/1000ft then (0.2365/1000)*47370.1=11.2 ohms as the impedance of the length of the cable. P=I^2*R=4902.1W

Could someone please tell me where I've gone wrong here?

Thanks in advance

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculate the power loss in electrical cable

Have something to add?

Draft saved
Draft deleted

Loading...

Similar Threads - Calculate power loss | Date |
---|---|

High Current low Voltage | Sep 17, 2017 |

Decaying current power calculation | Jul 3, 2017 |

How to calculate power loss from a transformer | Aug 4, 2011 |

**Physics Forums - The Fusion of Science and Community**