NGR cable connection

[asdqwert]

One turbine motor 5.5WM, 11kV, short circuit 25KA, NGR 100A, 63.5ohms, 10s. How to select the cable to the NGR, I believe its size is half of the cable phase to phase 1x240sqmm, it is OK, it seems too big. It is right to choose cable just meet 100A.

 

[rbulsara]

In general yes but I would check it for mechanical strength as well short circuit withstand (damage curve) for 25KA, in case the NGR shorts out.

Rafiq Bulsara

http://www.srengineersct.com