A 240-volt, 3Ø motor requires a starter with how many power poles?

In a three-phase (3Ø) electrical system, a motor requires a starter that is capable of handling each of the phases of power. Since the motor in question operates on a 240-volt three-phase system, the starter must have a separate pole for each phase. Therefore, a starter for a 3Ø motor must have three distinct power poles to correspond to the three phases: L1, L2, and L3.

Each pole in the starter controls the current to one of the phases, allowing the motor to start and run effectively. This is essential for ensuring balanced operation and protecting the motor from issues like phase loss, which can lead to overheating or damage if one phase is disconnected. Thus, having three power poles in the starter is necessary for the correct and safe operation of a 240-volt, three-phase motor.