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A single phase, 50 kVA, 2400:240-Volt, 60Hz distribution transformer has the following parameters:

• Resistance of 2400-volt winding R1 = 0.75Ω,
• Resistance of 240-volt winding R2 = 0.0075Ω,
• Leakage reactance of the 2400-volt winding Xl1 = 1Ω,
• Leakage reactance of the 240-volt winding X12 = 0.01Ω,
• The exciting admittances on both sides are negligible.

a. Draw the equivalent circuit referred to the high-voltage side.
b. The transformer is used as a step-down transformer at the load end of the feeder (distribution line) whose impedance is (0.5 + j2.0) Ω. Determine Vs at the sending end of this feeder when transformer delivers rated load at rated secondary voltage and 0.8 lagging power factor.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M9685584

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