What is the definition of the ideal current transformer?

An ideal current transformer (CT) is a type of transformer that is theoretically perfect, meaning it has no losses and can perfectly transform the current from a high value on the primary side to a lower value on the secondary side proportional to the turns ratio, without any phase difference between the input and output currents. In essence, for an ideal current transformer:

1. 100% Efficiency: It operates with no losses, meaning all the power in the primary circuit is transferred to the secondary circuit.
2. Perfect Transformation Ratio: The ratio of primary to secondary currents is exactly equal to the turns ratio of the transformer. If the primary has 100 turns and the secondary has 1 turn, and 100 A flows in the primary, exactly 1 A will flow in the secondary.
3. No Phase Shift: There is no phase difference between the primary and secondary currents. This means the current waveforms in both the primary and secondary circuits are in perfect alignment.
4. Infinite Permeability of the Core: The magnetic core around which the CT windings are wrapped has an infinite permeability, implying that it can guide the magnetic flux without any saturation or hysteresis losses.
5. Zero Burden: The secondary circuit is considered to have a zero impedance or ‘burden,’ meaning it does not affect the transformer’s performance. In real-world applications, the burden is the combined effect of the connecting leads, the measuring instruments, and any control devices wired to the