FAQ: What is the life expectancy of a Sigma-5 motor when operating above 40 degrees Celsius (104 F)?
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The Sigma-5 motor's class F insulation system is rated at 155 degrees Celsius (311 F) maximum internal operating temperature. Every 10 degree C increase of actual temperature above this maximum specification will decrease the life of the insulation system by 50%. The internal temperature of a motor producing rated torque, operating at or below an ambient temperature of 40 degrees Celsius, and mounted to the recommended heat sink should not normally exceed this 155 degrees Celsius limit.
Within the rated operating conditions, Yaskawa America Inc. recommends that the bearings be serviced every 20,000 hours. If the ambient temperature exceeds 40 degrees Celsius, the usable life of the bearings and the motor can be decreased but there is no other information available on the bearing life degradation in elevated temperature conditions. The recommended service schedule can be found in the Safety Precaution pamphlet manual that is shipped with every motor ( Manual No. C230200 00B).
Please see the attached document for other safety precautions and service schedules.
SAFETY PRECAUTIONS AND INSTRUCTIONS FOR USE OF FAQ INFORMATION!
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 supersede 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.
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If you have an urgent request, please call: 1-800-YASKAWA (927-5292) or 1-847-887-7000.Electronically
To contact us electronically, please select your type of request and complete the form.Yaskawa America, Inc. - Drives & Motion Division
2121 Norman Drive South
Waukegan, IL 60085