12-09-2012, 10:02 AM
Dear Members,
I have a doubt regarding track circuit calculation.
Given : The minimum ballest resistance RB= 2.5 ohm.km
To calculate the length of track circuit L,
The formula is RB=(ρL)/a
where
ρ = Resistivity ohm meter
L = Length in meter
a = Cross sectional area in square meter
if we know the ballest resistance, how to find the length of track circuits.
i have verified in one of the calculations
the sample calculation conveys me
RB=ρ/L
how this is derived?
what abt the cross sectional area?
I got confused regarding this kindly clarifiy and also
what is the difference between ohm.km & ohm/km ?
Regards,
Murugesan
I have a doubt regarding track circuit calculation.
Given : The minimum ballest resistance RB= 2.5 ohm.km
To calculate the length of track circuit L,
The formula is RB=(ρL)/a
where
ρ = Resistivity ohm meter
L = Length in meter
a = Cross sectional area in square meter
if we know the ballest resistance, how to find the length of track circuits.
i have verified in one of the calculations
the sample calculation conveys me
RB=ρ/L
how this is derived?
what abt the cross sectional area?
I got confused regarding this kindly clarifiy and also
what is the difference between ohm.km & ohm/km ?
Regards,
Murugesan