Question
Download Solution PDFThe phase impedance of a balanced star connected load is ZY = 40 + j30 Ω. What will be the phase impedance of the equivalent Δ-connected load?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFStar to Delta Conversion
The delta equivalent of a star connected resistor is:
\(R_A={R_1R_2+R_2R_3+R_1R_3\over R_3}\)
\(R_B={R_1R_2+R_2R_3+R_1R_3\over R_2}\)
\(R_C={R_1R_2+R_2R_3+R_1R_3\over R_1}\)
If all resistances connected in the star are equal to 'R', then the delta equivalent resistance is:
\(R_A=R_B=R_C={3R}\)
Calculation
Given, ZY = 40 + j30 Ω
ZΔ = 3 × (40 + j30)
ZΔ = 120 + j90 Ω
Last updated on May 29, 2025
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