(b) The equivalent impedance referred to the primary of a 2300/230 V, 500KVA, single-phase transformer is, Zeq 0.2+j0.60. (i) (ii) Calculate the voltage regulation when the transformer delivers rated capacity at 0.8 pf lagging at rated secondary voltage. Find the efficiency of the transformer at rated condition given that magnetizing components, R₂ = 120k and X, -50k.

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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(b) The equivalent impedance referred to the primary of a 2300/230 V, 500KVA,
single-phase transformer is, Zeq 0.2+j0.6.
(i)
(ii)
P
Calculate the voltage regulation when the transformer delivers rated
capacity at 0.8 pf lagging at rated secondary voltage.
Find the efficiency of the transformer at rated condition given that
magnetizing components, R. = 120k and X, -50kn.
Transcribed Image Text:(b) The equivalent impedance referred to the primary of a 2300/230 V, 500KVA, single-phase transformer is, Zeq 0.2+j0.6. (i) (ii) P Calculate the voltage regulation when the transformer delivers rated capacity at 0.8 pf lagging at rated secondary voltage. Find the efficiency of the transformer at rated condition given that magnetizing components, R. = 120k and X, -50kn.
Question 2
(a) A 220V, 1.5kW, 859 rpm, separately excited DC motor has armature resistance of
2.50 and it draws a current of 8A at rated load condition. If the field current and
the armature current are fixed at the value of rated speed at rated load, what will
be the no load speed of the motor? Assume losses remain constant between no-
load and full-load operation.
Transcribed Image Text:Question 2 (a) A 220V, 1.5kW, 859 rpm, separately excited DC motor has armature resistance of 2.50 and it draws a current of 8A at rated load condition. If the field current and the armature current are fixed at the value of rated speed at rated load, what will be the no load speed of the motor? Assume losses remain constant between no- load and full-load operation.
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