A single-phase 120 kVA, 2400/240 V, 60-Hz distribution transformer is used as a step-down trans- former....

 

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A single-phase 120 kVA, 2400/240 V, 60-Hz distribution transformer is used as a step-down trans- former. The load, which is connected to the 240-V secondary winding, absorbs 110 kVA at 0.85 power factor lagging and is at 230 V. Winding resistances are R₁-2 52 and R₂ -0.05 52; leakage reactances are X₁ = 2.5 2 and X₂-0.02 2. Calculate the following (using actual values): a) equivalent series impedance, referred to the primary b) primary voltage c) the real and reactive power supplied to the primary winding Using transformer ratings as base values, rework Problem in per-unit. A single-phase 120 kVA, 2400/240 V, 60-Hz distribution transformer is used as a step-down trans- former. The load, which is connected to the 240-V secondary winding, absorbs 110 kVA at 0.85 power factor lagging and is at 230 V. Winding resistances are R₁-2 52 and R₂ -0.05 52; leakage reactances are X₁ = 2.5 2 and X₂-0.02 2. Calculate the following (using actual values): a) equivalent series impedance, referred to the primary b) primary voltage c) the real and reactive power supplied to the primary winding Using transformer ratings as base values, rework Problem in per-unit.

Answer rating: 100% (QA)

Answer Given data Transformer rating 120 kVA Primary voltage VP 2400 V Secondary voltage VS 240 V Load power Sload 110 kVA Power factor cos 085 laggin... View the full answer