But I can be certain that whenever I see 230V 50Hz it will be 400Y or 230/460? Either way if 230V is the nominal voltage, it will be referenced to ground. 400 or 460V will be between phases.
I am reading through some older posts hoping to get a better intuition for the power circuit I am dealing with. Current is indeed flowing from the 230V leg through the load and back to the transformer on the neutral leg. Even though the transformer leg is grounded, the current does not travel to ground at this point, but goes back through the transformer and through the load, and then through the neutral again, and then through the transformer, load, neutral again, of course, switching directions 100 times a second. Is this correct? The 400Y distribution transformer is grounded, and the neutral is connected to this ground, but no current flows to ground unless another conductor in the system is grounded through a ground fault?
The above description also holds for secondary's of control transformers? Anyone willing to elaborate on that would be much appreciated.
Also, is there an official source that I can look up say, for Singapore or Korea that I can look at and determine what kind of power system they have? I know there are several on the net, but I would like to have one recommended from the forum.
Also, it is easy to find diagrams of 460V transformers that have two fuses on the primary. If anyone can find diagrams or resources showing fusing for 230V transformers on a 400Y or 230/460V system, that would also be appreciated. Are there any arguments for grounding both primary legs of a 230V circuit derived from a 400Y source?