Power Systems
The load current in short circuit calculations are neglected because

 nether 1 nor 2
 short circuit currents are much larger than load currents
 short circuit currents are greatly out of phase with load currents
 both 1 and 2

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Power Systems
The VSWR of transmission line is

 Proportional to load and characteristic impedance.
 Directly proportional to characteristic impedance and inversely to load impedance.
 Directly proportional to voltage minimum and inversely proportional to voltage maximum.
  Directly proportional to load impedance and inversely to characteristic impedance.

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