WebMar 20, 2014 · The service factor is expressed as a decimal. If you do not see a service factor rating on the motor nameplate the service factor is typically 1.00. Additionally, all motors running on a VFD (even at 60 HZ) will lose service factor and be rated at 1.00. Please consult your manual for more information. WebJul 2, 2024 · Cooling is necessary to continuously transfer the heat to a cooling medium, such as the air. The different methods of cooling rotating machines are classified in the standards IEC 34.6 and AS 1359.21. For AC induction motors, cooling air is usually circulated internally and externally by one or more fans mounted on the rotor shaft.
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Web• As for sizing a motor controller (VFD) which has a horsepower rating, Article 430.83 (A)(1), Horsepower Ratings, states that, “Controllers … shall have horsepower ratings at the application voltage not lower than the horsepower rating of the motor.”3 o If the driven motor doesn’t have a horsepower rating, Article 430.6(A)(1) states for Webstatic.weg.net greatwall hwcl series
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