if the distributed transformers are not operated in parallel and connections between the substations are only used as transfer connections, the connections may be configured as a five-phase TN-S system with L1-L2-L3-N and PE. Four phase switching devices (L1-L2-L3 and N) are ,however...
as far as I remember, there was an article about
the affect of sun on the earth. Although it is
rarely, the sun might increase its magnetic field
on the world and this might cause phenomenal and
strange trips on electrical transmission lines and...