Bars cross section calculation
Bars cross section calculation
(OP)
Hello
I must define the permissible permanent current on a existing bus bars.
Do you know which formula must be apply to define this value when I get :
Voltage : HV 13kV
width : 50mm
Depth : 5mm.
Metal : Copper
The bus bar in inside a closed local.
I have the same problem with aluminium and U profiles bars.
Thanks
P.
I must define the permissible permanent current on a existing bus bars.
Do you know which formula must be apply to define this value when I get :
Voltage : HV 13kV
width : 50mm
Depth : 5mm.
Metal : Copper
The bus bar in inside a closed local.
I have the same problem with aluminium and U profiles bars.
Thanks
P.






RE: Bars cross section calculation
Regards
Marmite
RE: Bars cross section calculation
* 679 A for painted conductor up to 60 Hz.
* 583 A for bare busbar.
* 703 A for DC and up to 162/3 Hz painted.
* 588 A for DC bare.
If the condition of temperature changes, adjustment is required either using calculation or published data with similar conditions.
RE: Bars cross section calculation
And why a higher carrying capacity after painted compare to bare. By heat loss consideration or temperature rise limit you would assume the bare copper to be the limit.
Please advise.
RE: Bars cross section calculation
Brian