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Cómo efectuar una "prueba de impacto" para resonancia

  • July 2024
  • Number of views: 1736
  • Article rating: No rating
Article

Cuando la resonancia causa una vibración excesiva, es importante identificar la frecuencia natural y la forma modal de la vibración. Una simple prueba de impacto (bump test), realizada a máquina parada, es un buen primer paso para identificar la frecuencia natural.

How to Conduct a “Bump Test” for Resonance

  • July 2024
  • Number of views: 2222
  • Article rating: No rating
Article

When resonance does cause excessive vibration, it is important to identify the natural frequency and the mode shape of the vibration. A simple bump test, conducted with the machine not running, is a good first step in identifying the natural frequency.

Performing an Insulation Resistance Test

  • March 2023
  • Number of views: 7486
  • Article rating: 4.0
Video

This video explains how to check the ground insulation of an AC motor winding using the insulation resistance (IR) test.

Open Stator Impedance Testing

  • November 2022
  • Number of views: 4288
  • Article rating: 5.0
FREE for Members of EASA
Webinar recording

The open stator impedance test (a.k.a, ball test or dummy rotor test) is used by many service centers as a quality control check before winding treatment and/or a troubleshooting test. This webinar recording reviews test procedures, expected outcomes and incorporating thermal camera imaging.

Consider Rated Voltage and Frequency When Testing

  • July 2022
  • Number of views: 3883
  • Article rating: No rating
Article

When possible, it is good practice to perform an uncoupled, no-load run on an induction motor as an incoming diagnostic test. A no-load run should also be performed after assembly, and ANSI/EASA AR100-2020 states that “no-load running tests should be made at rated voltage and rated frequency.” In this article, we’ll discuss some of the reasons why this is important and some things to consider when you cannot meet both requirements.

Cuando Haga Pruebas Considere la Tensión y Frecuencia Nominales

  • July 2022
  • Number of views: 4011
  • Article rating: No rating
Article

Como forma de diagnóstico y cuando sea posible, una buena práctica consiste en probar en vacío un motor de inducción que entra al centro de servicios. Esta misma prueba también se debe efectuar después del ensamblaje y la norma ANSI/ EASA AR100-2020 establece que "las pruebas en vacío se deben realizar a la tensión y frecuencia nominales". En este artículo, discutiremos algunas de las razones por las que esto es importante y algunos factores a considerar cuando no se puede cumplir con ambos requisitos.

Factors to Consider When Testing DC Armatures

  • May 2021
  • Number of views: 14564
  • Article rating: 5.0
Article

There are a lot of factors to take into consider when interpreting the bar-bar test or surge test. This articles reviews those factors.

Factores a Considerar al Probar Armaduras de CC

  • May 2021
  • Number of views: 13789
  • Article rating: No rating
Article
Hay muchos factores a tener en cuenta al interpretar la prueba de barra-barra o la prueba de sobretensión. Este artículo revisa esos factores.

Cómo Probar y Evaluar la Condición del Núcleo de un Estator con la Prueba de Lazo (“Toroide” o Loop Test)

En Español

  • April 2020
  • Number of views: 15255
  • Article rating: 4.0
FREE for Members of EASA
Webinar recording

¿El motor consume mucha corriente en vacío, aunque los datos del bobinado son correctos? ¿El motor se calienta con carga de forma inusual? Estas son preguntas comunes que pueden ser resueltas verificando la condición del núcleo del estator. En este webinario discutiremos cómo realizar la prueba de lazo en el núcleo de un estator y cómo analizar los resultados obtenidos, proporcionando información sobre los equipos utilizados, consejos para reparar el núcleo del estator y otras pruebas alternativas.

High-Potential Testing of AC Windings

  • December 2019
  • Number of views: 8866
  • 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.

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 2024
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.

VIEW & DOWNLOAD