The Primary Winding Resistance And Reactance Of A 10 Kva 2000 400 V Single Phase Transformer Is 5 5 Ohm And 12 Ohm Re 1 (89.34 KiB) Viewed 57 times
The Primary Winding Resistance And Reactance Of A 10 Kva 2000 400 V Single Phase Transformer Is 5 5 Ohm And 12 Ohm Re 2 (28.98 KiB) Viewed 57 times
The primary winding resistance and reactance of a 10 KVA, 2000/400 V, single phase transformer is 5.5 ohm and 12 ohm, respectively, the corresponding values for secondary are 0.2 ohm and 0.45 ohm. Determine the value of the secondary voltage at full load, 0.8 p.f. lagging, when the primary supply voltage is 2000 V. A 15 KVA 2300/230 V, single phase transformer has 2.5 ohm resistance and 10 ohm reactance for primary and 0.02 ohm resistance and 0.09 ohm reactance for the secondary. If the secondary terminal voltage is to be maintained at 230 V and 0.8 p.f. lagging at full load current, what should be the primary voltage? The turns ratio of 212 kVA single-phase transformer is 8. The resistance and reactance of the primary is 0.85 ohm and 4.8 ohm, respectively and the corresponding values for the secondary are 0.012 ohm and 0.07 ohm, respectively. Determine the voltage to be applied to the primary to obtain a current of 150 A in the secondary when the secondary terminal are short circuited. Ignore the magnetising current A 40 KVA, 6600/250 V, 50 Hz transformer is having total reactance of 35 ohm when referred to primary side whereas its primary and secondary winding resistance is 10 ohm and 0.02 ohm, respectively. Find full load regulation of at a p.f. 0.8 lagging. A 75 KVA single phase transformer, 6600/230 V, requires 310 V across the primary to the primary to circulate full load current on short circuit, the power absorbed being 1-6 kW. Determine the voltage regulation and the secondary terminal voltage for half full load, 0-8 p.f. lagging. A 10 KVA, 500/100 V transformer has the following circuit parameters referred to primary: Equivalent resistance, Req = 0-3 ohm; Equivalent reactance, Xeq = 5-2 ohm. When supplying power to a lagging load, the current, power and voltage measured on primary side were 20 A, 8 KW and 500 V, respectively. Calculate the voltage on the secondary terminals under these conditions. Draw the relevant phasor diagram.
A single phase transformer with a ratio 5: 1 has primary resistance of 0-4 ohm and reactance of 1-2 ohm and the secondary resistance of 0.01 and reactance of 0.04 ohm. Determine the percentage regulation when delivering 125 A at 600 V at (i) 0-8 p.f. lagging (ii) 0.8 p.f. leading. If the ohmic loss of a transformer is 1% of the output and its reactance drop is 5% of the voltage, determine its regulation when the power factor is (1) 0-8 lagging (ii) 0-8 leading (iii) unity.
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