What are the recommended maximum Start/Stops per hour of a standard electric motor?

Why Frequent Starts and Stops Matter

Frequent cycling (starting and stopping) of electric motors can lead to:

• Increased thermal stress on windings and insulation

• Accelerated wear on mechanical components (splines, bearings, etc.)

• Overloading of control elements like pressure switches, relays, and capacitors

Motors require a cool-down period between starts to dissipate heat generated by inrush current. Without it, premature failure can occur.

Can I Increase Start Frequency?

Yes — but only under certain conditions. Using a motor with a properly configured Inverter or Variable Frequency Drive (VFD) or Soft Starter can mitigate thermal and mechanical stress, allowing for more frequent starts.

If your application requires high cycling, contact our engineering team for a custom recommendation.

Notes

• Values are based on internal testing and application experience.

• Off time values are derived from empirical test data assuming variable torque loads.

• Always ensure your system design (including control panels and switching components) is rated for your chosen duty cycle.