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Electrical Machines problem - Electricalengineering
please show your calculation,if calculation are notprovided, I will dislike and report if you do this.
A 2300/230-V, 20-kVA transformer has been tested to determine its parameters. The test data obtained from the HV side are: 2.3 The full-load efficiency a. 98.04% 2.2 The kVA loading at which maximum efficiency occurs is: a. 12 kVA 15.5 kVA c. 16 kVA d. d. 7.2 kVA The maximum efficiency nmax at rated voltage and 0.8 PF lagging is: a. 98.2% b. 98.5% 97.6% d. 99.1% 2.4 The equivalent series impedance referred to the HV side Z`q is: a. 28.7+j412 3.3+j4.7 c. 0.66+j0.94 d. 1.9+j2.802 2.5 The core resistance Rc and magnetizing reactance X referred to the HV side are: c. Rc-35.27 k2 Rc-35.27 kc. X-9.14 kn Rc-913.812 X = 352.7 Ω I Test O.C.T 0.26 S.C.T 8.7 of the transformer at rated voltage and 0.8 PF lagging is: 97.56% d. 96.97% b. V 2300 50 98.16% e. none of the above e. none of the above e. W 150 250 e. Rc=9.142 d. Rc 352.7 X = 35.27 k X-913.8 none of the above none of the above e. none of the above