11-10-2012, 05:59 PM
At Wikipedia, I found this informative . . . .
http://en.wikipedia.org/wiki/Earthing_system
but I am puzzled about their drawing accompanying the IT system: it does not show a N connection from the source to the load; the star point of the transformer is not connected to anything at all . . . so why the earth connection at the consumer load? In effect, it is a 415-v floating 3-phase supply. Am I correct, have I misunderstood something or has Wiki made a mistake in their drawing?
Al.
http://en.wikipedia.org/wiki/Earthing_system
but I am puzzled about their drawing accompanying the IT system: it does not show a N connection from the source to the load; the star point of the transformer is not connected to anything at all . . . so why the earth connection at the consumer load? In effect, it is a 415-v floating 3-phase supply. Am I correct, have I misunderstood something or has Wiki made a mistake in their drawing?
Al.
