The low voltage winding of a three phase motor are connected in ________.

The low voltage winding of a three phase motor are connected in ________.

• A. Series
• B. Parallel
• C. Star
• D. Delta

Answer: (B)

When a three-phase motor is designed for dual voltages, there are two identical windings per phase. To run on a lower supply voltage, those windings are connected in parallel so each winding sees the same low voltage, while the parallel paths provide greater current capability. This keeps the magnetic excitation and torque similar to what the motor is rated for at that voltage. If you wired them in series, each winding would have to withstand a portion of the higher voltage, which is how the motor is configured for higher voltage operation. Star and delta are different ways of arranging windings to achieve the desired line voltage relationship, but for the practical low-voltage operation, parallel connection is used.

When a three-phase motor is designed for dual voltages, there are two identical windings per phase. To run on a lower supply voltage, those windings are connected in parallel so each winding sees the same low voltage, while the parallel paths provide greater current capability. This keeps the magnetic excitation and torque similar to what the motor is rated for at that voltage. If you wired them in series, each winding would have to withstand a portion of the higher voltage, which is how the motor is configured for higher voltage operation. Star and delta are different ways of arranging windings to achieve the desired line voltage relationship, but for the practical low-voltage operation, parallel connection is used.