FAQ# DRV-5NTJJK Published: 07/13/2004

Question:How does electronic thermal (motor protection) work?
Answer: The motor heat characteristics are simulated by observing the motor current and operating frequency data. The motor is protected from overheating within its entire speed range. The motor characteristics differ by motor type, thus it is necessary adjust the inverter programming for the appropriate motor type, i.e., standard motors or inverter-duty motors. When dealing with multiple motors connected to one drive, a thermal relay is required for each individual motor. Most Yaskawa drives contain a UL approved motor overload protection such as Class 20. Refer to the specific Drive specifications for details.

Product Information:

Product Group:Inverters/Drives
Product:Any AC Drive
Applications:
Category:Protective Features

Other Information:

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Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not superceed it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ. All warnings, cautions and product instruction for product use must be followed. Installation, operation and maintenance should be carried out by qualified personnel. Failure to observe these and other precautions highlighted in the product manuals will expose the user to high voltages resulting in, serious injury or death. Qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of Yaskawa products of the type described and have proper qualifications to perform the work.