If it is required that the coils 'R1-R2-R3' in the indicator of figure "A", turn opposite to those in the transmitter, as shown in the illustration, what action should be taken? Illustration EL-0092

Correct Answer: Option C — Interchange leads 'R1' and 'R3'.

Reversing rotational direction between synchro transmitters and indicators requires reversing the polarity of two phase connections. Interchanging leads R1 and R3 reverses the phase sequence of the rotor circuit, forcing the indicator coils to rotate in the opposite direction relative to the transmitter.