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“Good Practice Guide” for 3-phase motor repair and rewinds


May 13, 2021
By Anthony Capkun


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May 13, 2021 – EASA has published a Good Practice Guide that aims to help end users obtain repairs and rewinds for 3-phase electric motors (including Premium Efficiency/IE3) that maintain the motor’s energy efficiency and reliability.

The document covers best practices for inspection, testing, mechanical repair and electrical rewinds. It also explains how repair procedures can affect common types of motor losses and efficiency, underscoring the importance of requiring service providers to follow the repair best practices in ANSI/EASA AR100-2020 “Recommended practice for the repair of rotating electrical apparatus”.

“More than 97% of an electric motor’s lifetime cost is for the electricity it uses to operate. Any measurable change in its efficiency can significantly affect operating costs […]” said EASA’s Linda Raynes.

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