Can anyone help me in calculating the resistance and reactance values of a rectangular busbar.

Dear ;

You can calculate them by using the following formulas :

R = ρ x L / S

X = λ x L

Where :
ρ : Copper Resistivity, that's " 18.51 m.ohm/mm2 " at " +20°C " and " 22.76 m.ohm/mm2 " at " +70°C "
λ : Reactance/meter, that's " 0.15 m.ohm/m " if the Bus Bar is " Standard on Edge "
L : Length " meter "
S : Section " mm2 "

Thanks for your reply,
Is the reactance value is a constant one ,any source of refrence for this value.

Dear ;

As I mentioned, the value of reactance is depending on the positioning of Bus bar, and the mentioned value " 0.15 m.ohm/m " is for " Standard on Edge " Bus bar, that means " Rectangular Bus bar ", positioned " on Edge ", and the Bus bar are " Horizontally positioned "

Thanks for your reply.