1. A 2.4-kVA, 2400/240-V, 50-Hz, the step-down transformer has the following parameters: : RH = 1.50, :XH = 2.502, R₂ = 0.020, : X = 0.030, R = 6k2, and: Xm = 8kQ2. It is operating at 50% of its load at 0.5 power factor leading. Using the exact equivalent circuit embodying the ideal transformer, determine the efficiency of the transformer. Also, sketch its phasor diagram.

SOLVE STEP BY STEP IN DIGITAL FORMAT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX  2. A transformer with a 10/1 turns ratio has a maximum flux density of 60,000 lines/in2, when the primary winding is connected to a 2300 V power supply at 60 cps.  What will be the maximum flux density if the secondary is connected to a 115 volt supply at 25 cps with the primary open?

A transformer has 600 primary turns and 300secondary turns. The primary and secondary resistances are 0.35  and 0.09  respectively and the corresponding leakage reactances are 1  and 0.08  respectively. Determine  (a) the equivalent resistance referred to the Secondary winding,  (b) the equivalent reactance referred to the Secondary winding,  (c) the equivalent impedance referred to the secondary winding, and  (d) the phase angle of the impedance.

talk about coreless transformer

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Determine the regulation of a transformer in which thepercentage resistance drop is 1% and the percentagereactance drop is 5% when the power factor 0.8 leading.

391. A transformer has maximum efficiency at load copper loss (P.), is of full load. The ratio of its iron loss (P.) and full

4. What are the advantages of Delta connection in high power transformer?

Regulation for the trans.

Q2/ Complete the blank A single-phase transformer is rated at 50 kVA. The transformer has full load copper losses of 450 W and iron losses of 150 W.  The transformer efficiency at 1/4 th of the full load and 0.95 power factor is...............................................?