Good day
I am in the process of verification calculations for the earthing design for a generator and transformer (440V/ 6.6 kV) facility. There are a number of generators and transformers working in parallel.
In his CDEGS calculations the design engineer included for over 1800 meters in his earthing network resistance calcs, although he has only shown 250 m of copper tape and 28 x 1.2m electrodes. His explanation was that he included for the rebar in the concrete.
If my understanding is correct, one should not include for the e rebar in your earthing network resistance calcs, only the copper. However, one can include the rebar area when calculating your dissipation area?
Any thoughts on this would be welcome.
Kind regards,
Peter