Q2-A25KVA, 2500/250V, transformer takes 3A and 150W when 250V is applied to L.V Winding and H.V winding is kept open. It takes 10 A and 350W when the L.V winding is short-circuit and 90 V is applied to H.V winding Find: i) Percentage regulation on full-load at 0.8 p.f. lagging ii) KVA supply at maximum efficiency iii) The maximum efficiency at unity p.f.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.5MCQ: For an ideal 2-winding transformer, an impedance Z2 connected across winding 2 (secondary) is...
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Q2-A25KVA, 2500/250V, transformer takes 3A and 150W when 250V is applied to L.V Winding and
H.V winding is kept open. It takes 10 A and 350W when the L.V winding is short-circuit and 90 V
is applied to H.V winding Find:
i) Percentage regulation on full-load at 0.8 p.f. lagging
ii) KVA supply at maximum efficiency
iii) The maximum efficiency at unity p.f.
Transcribed Image Text:Q2-A25KVA, 2500/250V, transformer takes 3A and 150W when 250V is applied to L.V Winding and H.V winding is kept open. It takes 10 A and 350W when the L.V winding is short-circuit and 90 V is applied to H.V winding Find: i) Percentage regulation on full-load at 0.8 p.f. lagging ii) KVA supply at maximum efficiency iii) The maximum efficiency at unity p.f.
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