Dear forum members,
Would you give please a practical tips how to measure and what measurement equipment to use (with some examples if possible) to measure the rail-to-earth (tunnel) resistance and rail-to-earth (tunnel) potentials?
The measurements needed to be done in the tunnel (cast iron tubes) and above ground also (soil and ballast under the tracks) ?
This is a DC traction metro
Thank you so much.
Would you give please a practical tips how to measure and what measurement equipment to use (with some examples if possible) to measure the rail-to-earth (tunnel) resistance and rail-to-earth (tunnel) potentials?
The measurements needed to be done in the tunnel (cast iron tubes) and above ground also (soil and ballast under the tracks) ?
This is a DC traction metro
Thank you so much.