Motor Starters & Variable Frequency Drives

Motor starters and variable frequency drives for controlling motor speed, reducing inrush current, and protecting pumps, fans, and machinery loads. Variable-frequency drives (VFDs) vary AC motor speed and can reduce starting stress where motors and systems are compatible. They must be sized for motor current, phase, frequency, cooling and electrical interference control, not horsepower alone. Standard starters are appropriate for fixed-speed operation; compare whether the application actually benefits from speed control and confirm marine environmental requirements.