Jones Beene wrote:
Way too much.
You haven't done much transmission and distribution design I gather. :-)
AC has one great advantage when clearing fault currents: it goes through zero current 120 times a second. DC faults tend to burn until you melt away enough bus structure that the air gap resistance gets too high.
I don't know where you learned about house current, but that center-tapped transformer on the pole provides two hot buses 180 degrees out of phase. Either bus gives you 120 VAC rms to ground (neutral) and 240 VAC rms phase-to-phase.
BTW, hardly any system uses 5 kV for distribution anymore. Georgia Power uses 20 kV to keep distributon conductor sizes down.
