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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ISBN:9780133923605
Author:Robert L. Boylestad
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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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