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# Resistance and reactance values calculation

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

#1

09-17-2013 02:26 PM

Top #2

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 "

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 "

09-17-2013 04:32 PM

Top #3

Thanks for your reply,

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

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

09-17-2013 07:27 PM

Top #4

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 "

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 "

09-17-2013 09:57 PM

Top #5

Thanks for your reply.