The secondary winding of a transformer has a terminal voltage of vsec (t) = 234 sin (377t) V. The turns ratio of the transformer (N1/N2) is 72:201. If the secondary current of the transformer isec (t) = 12 sin(377t+ [25°]), (a) What is the RMS value of the primary current of this transformer? (b) What are its voltage reg- ulation and (c) efficiency? The impedances of this transformer referred to the primary side are Rsc = 0.292, Xsc = 0.752 and Re=30092, Xm = 709.

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The secondary winding of a transformer has a terminal voltage
of vsec (t) = 234 sin (377t) V. The turns ratio of the transformer
(N1/N2) is 72:201. If the secondary current of the transformer
isec (t) = 12 sin(377t + [25°]), (a) What is the RMS value of the
primary current of this transformer? (b) What are its voltage reg-
ulation and (c) efficiency? The impedances of this transformer
referred to the primary side are Rsc = 0.222, Xsc = 0.759 and
Rc = 30022, Xm = 7022.
N.B. To compute the regulation, neglect the excitation current of
the transformer, io = ic+im.
Single phase transformer with a load.
Rsc jX,
(~) v₂ (1)
-R₂
www
jX
m.
N₁:N₂
(a) RMS of primary current: A
(b) Voltage regulation: %
(c) Efficiency: %
—
Transcribed Image Text:The secondary winding of a transformer has a terminal voltage of vsec (t) = 234 sin (377t) V. The turns ratio of the transformer (N1/N2) is 72:201. If the secondary current of the transformer isec (t) = 12 sin(377t + [25°]), (a) What is the RMS value of the primary current of this transformer? (b) What are its voltage reg- ulation and (c) efficiency? The impedances of this transformer referred to the primary side are Rsc = 0.222, Xsc = 0.759 and Rc = 30022, Xm = 7022. N.B. To compute the regulation, neglect the excitation current of the transformer, io = ic+im. Single phase transformer with a load. Rsc jX, (~) v₂ (1) -R₂ www jX m. N₁:N₂ (a) RMS of primary current: A (b) Voltage regulation: % (c) Efficiency: % —
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