In the primary winding of the step-up transformer there are 80 turns of wire, in the secondary – 2000 turns.

In the primary winding of the step-up transformer there are 80 turns of wire, in the secondary – 2000 turns. what will be the voltage at the terminals of the secondary winding if you turn on the transformer into a network with a voltage of 220V? calculate transformation ratio

To calculate the voltage at the terminals of the secondary winding and the value of the transformation ratio of the taken transformer, we apply the formulas: Uv = Up * Nv / Np and k = Up / Uv = Np / Nv.

Variables: Uп – voltage in the network (Uп = 220 V); NV – turns in the secondary winding (NV = 2000 pcs.); Nп – turns in the primary winding (Nп = 80 pcs.).

Calculation: a) Voltage on the secondary winding: Uv = Up * Nv / Np = 220 * 2000/80 = 5500 V = 5.5 kV;
b) Transformation ratio: k = Uп / Uв = Nп / Nв = 220/5500 = 80/2000 = 0.04.

Answer: On the secondary winding of the transformer taken, the voltage is 5.5 kV; transformation ratio – 0.04.