I can't understand the language your using please change those responses int English

A transformer consists of two coils of wire, a primary coil and a secondary coil, wound around a soft iron core. For a step-up transformer, the secondary coil has a greater number of turns than the primary coil.

When an alternating current (AC) passes through the primary coil, it creates a changing magnetic field in the iron core. This changing magnetic field links with the secondary coil, inducing a voltage (EMF) in the secondary coil according to Faraday's Law of Induction. Since the secondary coil has more turns, the voltage is increased from 415 V to 2,000 V.

We use the power formula $P = VI$.

Where $P = 2 \, \text{kW} = 2000 \, \text{W}$ and $V = 2000 \, \text{V}$.

The power loss ($P_{\text{loss}}$) in the wires is given by the formula $P_{\text{loss}} = I^2 R$.
Where $I = 1 \, \text{A}$ and $R = 2 \, \Omega$.

The calculated power loss is $1 \, \text{W}$.
The allowed power loss limit is $5 \, \text{W}$.
Since $1 \, \text{W} < 5 \, \text{W}$, the power loss is within the acceptable limit.

Conclusion:
The device is efficient.