What is the maximum flux density of a 250 kVA transformer?

The maximum flux density in the core of a 250/3000 V, 50 Hz, 1-Φ transformer is 1.2 Wb/m2.If the emf/turn is 8 V, determine the primary & secondary turns. A 25-kVA transformer has 500 turns on the primary & 100 turns on the secondary winding.

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What is the efficiency of a 400 kVA single phase transformer?

The efficiency of a 400 kVA, single – phase transformer is 98.77% when delivering full – load at 0.8 p.f. lagging and 99.13% at half full – load at unity p.f. Calculate (i) Iron loss and (ii) Full – load copper loss. UNIT-III INDUCTION MOTORS PART-A

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What is the required voltage ratio in a 150kva 50 Hz transformer?

The required N.L voltage ratio in a 150kVA, 50 Hz 1-Φ transformer is 5000 / 250V. Find the number of turns in each winding for a maximum core flux of 0.06 Wb & efficiency at half rated KVA, u.p.f.

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What is the secondary voltage of a 1-φ transformer?

The voltage/turn of a 1-Φ transformer is 1.1V, when the primary winding is connected to a 220V, 50Hz ac supply, the secondary voltage is found to be 660V.Find (1) Primary & secondary currents (2) the core area if the maximum flux density is 1.2 T.

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