Question
Download Solution PDFA 415 V, three-phase star-connected alternator supplies a delta-connected load, each phase of which has an impedance of (86∠54.46°) Ω. Calculate kVA rating of the alternator, neglecting losses in the line between the alternator and load.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The kVA rating for a delta-connected load is given by:
S = 3VpIp
where, Vp = Phase Voltage
Ip = Phase Current
The phase current is given by:
\(I_p={V_p\over Z_p}\)
Calculation
Given, Vp = 415 V
Zp = (86∠54.46°) Ω
\(I_p={415\over 86∠54.46}\)
Ip = 4.82 ∠-54.46
S = 3 × 415 × 4.82
S = 6.002 kVA
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