Is the symbol of rated current In(n is subscript)?

The symbol of the rated current is not In, but i. In is the rated fusing current of the fuse. Rated current = rated power/rated voltage (I=P/U).

The rated current is the current flowing through the end of the winding calculated by dividing the rated capacity of the winding by the rated voltage of the winding and the corresponding coefficient (1 for single phase and √3 for three phases). Therefore, the rated current of transformer is the rated current of each winding.

Extended data

Current: I total = I 1 = I 2...= In (in series circuit, the currents in all parts of the circuit are equal); ?

Voltage: Utotal = U 1+U2...+UN (the total voltage is equal to the sum of voltages of all parts);

Resistance: r total =R 1+R2…+Rn (the total resistance is equal to the sum of the resistances of all parts).

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