StickThatInYourPipeAndSmokeIt wrote: (acting like the d-s he accuses others of)
So you think an entire town is fed from not just one substation, but one (coutem 1) SINGLE phase transformer?? get real. [You don't even generally get, two 240 v sources from a singe ph XF anyway, but lets ignore that] But even still, you you can have that much variation, especially if measured at two different times, with different loading, different MV source voltage, and different connection impedance.
jk