While the question is simple, the answer is not. If you examine the function and purpose of the soft starter and drive, the answer becomes clearer. Generally, the application determines the best fit. Common questions to ask are:
• Does the application need full torque at zero speed?
• Does the application need speed control once the motor is at speed?
• Does the application need constant torque?
• Does the application need precise starting and stopping times?
• Is space a consideration?

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