Electrical Machines
Use of fractional pitch winding

All of these
  make it stiffer.
  results in reduced leakage reactance.
  results in reduced axial length of the machine.

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Electrical Machines
In a transformer

 OC test is conducted on HV side and SC test is conducted on LV side
 both Oc and SC tests are conducted on HV side
 OC test is conducted on LV side and SC test is conducted on HV side
 both OC and SC tests are conducted on LV side

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