A 1 phase 440220v 5 kva 50hz transformer draws a no load...

A 1-phase, 440/220V, 5 KVA, 50Hz transformer, draws a no-load current of 0.8A at a p.f of 0.25 lag on h.v side. Determine the magnetizing component, core loss component, emf per turn on both side and the primary current when the secondary current is 18A at a p.f. of 0.9 lag.

A 230/110 V single-phase transformer has a core loss of 100 W. If the input under no-load condition is 400 VA, find core loss current, magnetizing current, and no-load power factor angle. 2. A single-phase, 50 kVA, 2300/230 V, 50 Hz transformer is connected to a 230 V supply on the secondary side, the primary being open. The meter indicates the following readings: Power = 230 watt, Voltage = 230 V, Current = 65 A. Find the core loss: iloss component of the current; iimagnetizing current. Draw the phasor diagram for this condition. 3. A 230 V, 50 Hz transformer has 200 primary turns. It draws 5 A at 0.25 p.f lagging at no-load. Determine: the maximum value of flux in the core; the core loss; the magnetizing current; the exciting resistance and reactance of the transformer. Also, draw its equivalent circuit.

Adi S.