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#219422 06/27/18 09:02 AM
Joined: Mar 2003
Posts: 849
Y
Member
I take it calculations are Calculations HV or LV .
Calculators on line seem to work for both HV & Medium voltage.
Any one know any different.Or have link to HV Calculators???
I know terms are 90c not 75c And cable amperage of cable different .
Thank you .
Yoopersup

Example below
1 conductors per phase utilizing a #3/0 Copper conductor will limit the voltage drop to 1.76% or less when supplying 200.0 amps for 8000 feet on a 13800 volt system.
For Engineering Information Only:
200.0 Amps Rated ampacity of selected conductor
0.077 Ohms Resistance (Ohms per 1000 feet)
0.042 Ohms Reactance (Ohms per 1000 feet)
345.0 volts maximum allowable voltage drop at 2.5%
242.798. Actual voltage drop loss at 1.76% for the circuit
0.9 Power Factor

2017 / 2014 NEC & Related Books and Study Guides
Joined: Jul 2004
Posts: 9,643
G
Member
Voltage drop is dependent on the current not the voltage so the calculator will still work but obviously the percentage is based on the voltage you start with.


Greg Fretwell

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