A 30 KVA, 2400/120V transformer has a high voltage winding resistance of 0.10 hm and a leakage of 0.022 ohms. The low voltage winding resistance is 0.10 ohms. Calculate equivalent winding resistance, reactance and impedance referred to - H.V. side - L.V side - Total copper loss of transformer -

Mumbai University > FE > Sem 1 > Basic Electrical and Electronics Engineering

Marks: 8 M

Year: May 2013, Dec 2012

Given:

KVA rating= 30 KVA

E1= 2400 V

E2= 920 V

K1= 0.1 Ω

X1= 0.22 Ω

R2= 0.035 Ω

X2= 0.012 Ω

K= E2/E1 = 120/ 2400 = 0.05

Ro1 = R1 + R2/K2

= 0.1 + 0.035/ (0.05)2 = 14.1 Ω

Ro2 = K2Ro1 = (0.05)2 * 14.1 …