naidely8528 naidely8528
  • 20-06-2024
  • Engineering
Answered

A transformer has its maximum efficiency of 0.98 at 15kVA at unity pothcr factor.
During the day it is loaded as follous :
12 hours - 3W at 0.5p;6 hours - 12W at 0.8p;
6 hours - 18W at 0.9p . Find its all day efficiency



Answer :

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