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Questions?

For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

ANSI/EASA Standard AR100-2025: Recommended Practice for the Repair of Rotating Electrical Apparatus

  • January 2026
  • Number of views: 15156
  • Article rating: 3.3

ANSI/EASA AR100 is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

Norma EASA AR100-2025: Práctica Recomendada para la Reparación de Máquinas Eléctricas Rotativas

  • January 2026
  • Number of views: 3858
  • Article rating: 4.0

La norma ANSI/EASA AR100 es una guía indispensable para la reparación de máquinas eléctricas rotativas. Su objetivo es establecer las prácticas recomendadas en cada etapa de los procesos de rebobinado y reconstrucción de aparatos eléctricos rotativos.

Induction Motor Rotor Windings: Squirrel-Cage and Wound Rotor Basics for the Technician

  • September 2025
  • Number of views: 4107
  • Article rating: No rating
FREE for Members of EASA

This presentation covers induction motor basics for squirrel-cage and wound rotor motors.

What’s New in NEMA MG 00001-2024 Besides the Title

  • June 2025
  • Number of views: 9167
  • Article rating: No rating

The 2024 NEMA MG 00001 standard introduces key updates, including new Design BE and CE motors with defined locked-rotor current limits, Class N insulation for high-temperature use, and revised stall time requirements. It adds Super Premium efficiency levels aligned with IEC IE4, adopts IEC voltage/frequency variation guidelines, and expands duty ratings for variable load/speed motors.

Novedades en la NEMA MG 00001-2024 Además del Título

  • June 2025
  • Number of views: 4826
  • Article rating: No rating

La norma NEMA MG 00001 2024 introduce actualizaciones clave, incluyendo nuevos motores de Diseño BE y CE con límites de corriente de rotor bloqueado definidos, aislamiento Clase N para uso a alta temperatura y requisitos revisados ​​de tiempo de pérdida. Añade niveles de eficiencia Super Premium alineados con IEC IE4, adopta las directrices IEC sobre variación de voltaje/frecuencia y amplía las capacidades de servicio para motores de carga/velocidad variable.

Performing a Single-Phase Rotor Test on an Assembled Three-Phase Induction Motor

  • May 2025
  • Number of views: 7412
  • Article rating: 2.5

The video provides a comprehensive guide on performing a single-phase rotor test on a three-phase squirrel cage motor to check for open rotor bars.

Los exclusivos motores de CA de las apiladoras de troncos: más allá del diseño D

  • February 2025
  • Number of views: 2753
  • Article rating: No rating

En este artículo, se profundizará en los motores de CA responsables de las funciones de inclinación y elevación de las apiladoras de troncos. Estos motores poseen características distintivas, incluido un rotor de alta resistencia.

Examining the Causes of High Motor Current

  • April 2024
  • Number of views: 6475
  • Article rating: No rating
FREE for Members of EASA

Are you encountering high no-load current or high current with load? This presentation will look into the causes and cures.

Effects of Harmonics on Squirrel Cage Rotors

  • May 2023
  • Number of views: 6147
  • Article rating: 2.5

If you mention harmonics, engineers get excited while the eyes of non-engineers glaze over. The truth is that harmonics can be easily understood when explained in layman’s terms.

Efectos de los armónicos en los rotores de jaula de ardilla

  • May 2023
  • Number of views: 4530
  • Article rating: 1.8

Si mencionas la palabra armónicos, los ingenieros se emocionan mientras que los ojos de los que no lo son se nublan. La verdad es que los armónicos se pueden entender fácilmente cuando se explican en términos sencillos. 

EASA Rewind Study cover

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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