@thesis{thesis,
		author={NUGRAHA  ADITYA DWIKA and Sumani  Sambodho},
		title ={STUDI EFISIENSI TRANSFORMATOR GARDU INDUK 150 / 20 kV},
		year={2015},
		url={http://156.67.221.169/1285/},
		abstract={The eficiency of transformers is comprasion between output power and input power. The efficiency resulted by the transformer can be influenced the size of load and influenced by core losses and copper losses at transformer. This losses cause a difference between input power and output power. The bigger losses resulted at transformer, the greater losses power at transformer.
This final report is to observe the efficiency of transformers in cengkareng switchyard.}
		}