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Resin Treatment Tips for Service Centers

  • October 2021
  • Number of views: 941
  • Article rating: No rating
Article

One of the most briskly debated issues in our industry is the comparison – and procedures for – vacuum pressure impregnation (VPI) versus dip & bake. For this article, the discussion has been expanded to include trickle epoxy and B-stage coils.

Consejos para el Tratamiento con Resina en los Centros de Servicio

  • October 2021
  • Number of views: 793
  • Article rating: 3.0
Article
Uno de los temas más debatidos en nuestra industria es la comparación y los procedimientos de impregnación a presión al vacío (VPI) versus inmersión y horneado. Para este artículo, la discusión se ha ampliado para incluir bobinas de etapa B y epoxi de goteo.

High-Potential Testing of AC Windings

  • December 2019
  • Number of views: 2815
  • Article rating: No rating
Webinar recording

High-potential testing is routinely used to assess the ground insulation of AC stator windings in-process, after completion of a rewind and post-delivery. This webinar covers types of high-potential tests, testing standards, evaluating test results, and more.

Considerations for surface masking and winding treatment processes

  • March 2018
  • Number of views: 3432
  • Article rating: 2.0
Article

One of the least popular tasks to perform related to winding treatment processes is preparation and cleanup of fits, threaded holes and machined surfaces. Many service centers invest additional time in the preparation stage so as to minimize the cleanup stage. The most common approach to protecting these surfaces during winding treatment is to utilize masking compounds or dry release sprays.

In the last year, EASA’s technical support staff has received a number of inquiries from members seeking replacement recommendations for Famous Lubricants' “Special Masking Compound” which is currently unavailable. It is believed at this time that the manufacturer intends on continuing production at some point in the future though the time frame is not known. This specific problem leads to a more general question: What is a good practice for choosing a product to mask these surfaces?

Consideraciones para enmascarar superficies y procesos de tratamiento de bobinados

  • March 2018
  • Number of views: 3025
  • Article rating: No rating
Article

Una de las actividades a realizar menos populares relacionadas con el tratamiento de los bobinados, es la preparación y la limpieza de los ajustes, agujeros roscados y superficies mecanizadas. Muchos centros de servicio invierten tiempo adicional durante la etapa de preparación para minimizar la etapa de limpieza. El enfoque más común para proteger estas superficies durante el tratamiento del bobinado consiste en utilizar compuestos para enmascarar o aerosoles de liberación de película seca. Durante el último año, el departamento de soporte técnico de EASA ha recibido una serie de consultas por parte de los miembros buscando recomendaciones para reemplazar el producto “Special Masking Compound” de Famous Lubricants’ (ver Figura 1) que actualmente no se encuentra disponible. Se cree en estos momentos que el fabricante tiene la intención de continuar con la producción en el futuro, aunque el plazo se desconoce. Este problema específico conlleva a una pregunta más general: ¿Cuál es una buena práctica para escoger un producto para enmascarar estas superficies?

Environmental update for EASA members in the U.S.

  • February 2018
  • Number of views: 1181
  • Article rating: No rating
Article

As we enter a new and exciting year of operating EASA businesses, we must remember that almost all service centers in the U.S. with either dip or vacuum pressure impregnation (VPI) tanks will be subject to the SARA Title 3, Tier II, reporting requirements. This requirement is part of the Emergency Planning and Community Right to Know Act (EPCRA). The EPCRA involves notifying the state and local community of any hazardous chemical stored onsite in quantities over 10,000 lbs. A hazard material for the purpose of this regulation is anything hazardous under the Hazard Communication standard. In other words, if it has a Safety Data Sheet and you had more than 10,000 lbs onsite at any time during the previous year (2017), then you are subject to this reporting requirement.  For most EASA centers, this will include the VPI, the dip tank varnish, or, in some cases, both varnishes.

Getting the most from power factor tip-up testing

  • April 2017
  • Number of views: 5388
  • Article rating: 1.0
Article

The power factor tip-up test is commonly used as a quality measurement for new coils and windings manufactured for AC motors and generators rated 6 kV and higher. It can also be useful in the rewind shop to verify the quality of a newly-installed coil system including the effectiveness of VPI processing.

Aprovechando al máximo la prueba de factor de potencia tip-up

  • April 2017
  • Number of views: 3935
  • Article rating: 5.0
Article

 

La prueba de volcado del factor de potencia se usa comúnmente como una medida de calidad para bobinas y devanados nuevos fabricados para motores de CA y generadores con clasificación de 6 kV y más. También puede ser útil en el taller de rebobinado para verificar la calidad de un sistema de bobina recién instalado, incluida la efectividad del procesamiento de VPI.

Keeping it cool: A look at causes of motor overheating

  • March 2015
  • Number of views: 4875
  • Article rating: 5.0
Article

We know that excessive temperature and moisture are the largest contributors to bearing and winding failures. Understanding the source of the increased temperature will help us to correct the problem and improve the machine’s life expectancy.

Condition Assessment of Stator Windings in Medium-Voltage Global VPI Machines

  • June 2014
  • Number of views: 1971
  • Article rating: No rating
Convention presentation

This paper, presented at the 2014 EASA Convention, describes research done by EASA service shops on the effectiveness and practicality of using offline partial discharge combined with a dielectrics characteristic test to evaluate the consolidation of stator windings in medium voltage machines manufactured by GVPI.

Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - coverThis 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.

This booklet covers topics such as:

  • Installation, startup and baseline information
  • Operational monitoring and maintenance
  • Motor and baseline installation data
  • How to read a motor nameplate
  • Motor storage recommendations

LEARN MORE AND DOWNLOAD MÁS INFORMACIÓN Y DESCARGAR BUY PRINTED COPIES

READ MORE ABOUT THE FEATURES AND BENEFITS

EASA/AEMT Rewind Study

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.

DOWNLOAD THE FULL RESULTS

ANSI/EASA AR100-2020

ANSI/EASA AR100-2015 cover

Recommended Practice for the Repair of Rotating Electrical Apparatus
This 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.

DOWNLOAD - ENGLISH

DESCARGAR - ESPAÑOL

EASA Technical Manual

EASA Technical Manual cover

Revised May 2021
The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.

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