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Tyler Voss Membership & Communications Specialist+1 314 993 2220tvoss@easa.com
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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.
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.
This video explains how to check the ground insulation of an AC motor winding using the insulation resistance (IR) test.
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.
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.
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.
There are a lot of factors to take into consider when interpreting the bar-bar test or surge test. This articles reviews those factors.
Hay muchos factores a tener en cuenta al interpretar la prueba de barra-barra o la prueba de sobretensión. Este artículo revisa esos factores.
¿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 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.
This 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:
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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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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.
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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.
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