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In the star-delta transformation shown in the figure, if P = 150 Ω, Q = 180 Ω and R = 60 Ω, then A = ?

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MPPGCL JE Electrical 28 April 2023 Shift 1 Official Paper
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  1. 260 Ω
  2. 470 Ω
  3. 780 Ω
  4. 312 Ω

Answer (Detailed Solution Below)

Option 3 : 780 Ω
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Detailed Solution

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Star to Delta Conversion

The delta equivalent of a star connected resistor is:

Calculation

Given, P = 150 Ω, Q = 180 Ω and R = 60 Ω

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More Star to Delta Conversion Questions

Q1.The 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?
Q2. In the star-delta transformation shown in the figure, if P = 150 Ω, Q = 180 Ω and R = 60 Ω, then A = ?
Q3.A balanced, delta-connected load has an impedance of 3∠30° Ω/phase. What will be the impedance of an equivalent star-connected load?
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Q8.Find DELTA equivalent resistance R12, R23, and R31 from the given STAR configuration.
Q9.Determine the value of equivalent resistance across nodes a and b.

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