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Power Transmission Distributors Association is...

comprised of companies that distribute and manufacture the components that keep your world running smoothly.

Tech Tip: PT Accessories

Enhance your employees’ product and industry knowledge with PTDA’s Tech Tips. This library of online tips, hints and techniques may be used to educate new and current employees on power transmission/motion control (PT/MC) products, technologies and concepts and serve as reference and reminder for more experienced staff. Tech Tips are based on the expertise of PTDA member companies or content from PTDA’s Power Transmission Handbook®, the definitive resource and training tool on PT/MC products. Subscribe to the monthly Tech Tips email series to receive two new tips each month. 

Visit the full library of Tech Tips for additional products.

What are the most common types of overload protection used to protect critical power transmission components, and what are their main differences?

The two most common types of overload protection are electronic and mechanical protectors are:
  • Electronic Overload Protectors work by measuring and monitoring the electrical draw of the motor. When the draw from the motor exceeds a set point, the electronic overload protector sends a signal to the motor controller to cut power to the motor.
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  • Mechanical Overload Protectors are installed to a driven rotating shaft and has some rotating element attached to it (sprocket, gear, pulley, coupling, etc.). When the torque experienced by the rotating element exceeds a set amount, the overload protector physically disengages the rotating shaft from the rotating element to prevent torque transmission. 
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The information provided in Tech Tips is not meant to be all-encompassing, but rather to draw attention to and provide information about the particular subjects covered. All suggestions and recommendations contained in Tech Tips are based upon information that is believed to be accurate to the best of the experience and knowledge of PTDA’s contributing members, but are made without guarantee or representation as to results. PTDA and Tech Tip contributors expressly disclaim any warranties or guaranties, express or implied, as to the accuracy or completeness of any information published in Tech Tips, and disclaims and makes no warranty that the information in Tech Tips will fulfill any of your particular purposes or needs. PTDA and Tech Tip contributors disclaim liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on Tech Tips.