As VFDs and their applications have become more complex, it can be difficult to determine what type of VFD will be required for an application and how the motor needs to be controlled. Learn more about the basics of  low voltage AC drive types and control methods.

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The latest edition of EASA's flagship standard — ANSI/EASA AR100-2020: Recommended Practice for the Repair of Rotating Electrical Apparatus — is now available for download.

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When preparing to rewind synchronous rotor coils, select rectangular wire of the same cross-sectional area, between a 2:1 and 3:1 width to thickness ratio. When laying out the turns & layers, install the top collar, wind the first layer, and then determine the required thickness for the bottom collar. The bottom collar thickness can be adjusted for a perfect fit.

• When shutting down the equipment, relieve the hose pressure before turning the nozzle away from the blasting area.
• When practical, perform blasting operations in a separate structure, an area isolated by partitions or in a restricted area.
• Keep all food and drink out of the blasting area.

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