Presented by Gene Vogel
EASA Pump & Vibration Specialist

The wear ring clearance in a centrifugal pump is a critical factor in the efficiency of the pump. The repair process often includes replacement of casing and impeller wear rings. The topic of this webinar is ensuring the proper clearances, materials and installation process for centrifugal pump wear rings.

Primary topics are:

• Determining if the wear ring as-found condition is acceptable
• Recommendations for wear ring clearances if manufacturer’s data is unavailable
• Consideration of possible material selection for replacement wear rings
• Tips for installing replacement wear rings

This webinar is intended for pump technicians, engineers, supervisors and managers. The content will be beneficial for persons of all skill levels.
 

Presented by Tom Bishop, PE
EASA Senior Technical Support Specialist

One of the most frequent member requests to EASA’s technical support group is for the conversion of a 3 phase winding from concentric to lap. The emphasis in this session will be to cover the important details for a proper concentric to lap winding conversion.  

Primary topics are the most common methods for concentric to lap conversion:

• “Rule of thumb”
• Concentric to lap conversion tables in EASA Technical Manual
• EASA AC Verification and Redesign (ACR) computer program
• Hand/manual calculation

This webinar is intended for winders, engineers, supervisors and managers. The content will be beneficial for beginners through highly experienced persons.

Carlos Ramirez
Especialista de Soporte Técnico de EASA

Escoger el cable adecuado para el bobinado de un nuevo estator es una tarea crítica cuando no existen especificaciones del fabricante, el número circuitos o las conexiones externas varíe o se requiera cambiar el cable de salida. 

Este webinario revisará:

• Materiales disponibles
• Tipos de aislamiento
• Voltajes nominales
• Procedimientos de cálculo

Este webinario es apropiado para todos los profesionales electromecánicos que necesiten seleccionar cables de salida de motores.

Presented by Mike Howell, PE
EASA Technical Support Specialist

This will be an encore presentation of a January 2018 webinar and will cover the following topics.

• Induction motor basics for operation
• Squirrel-cage
  • Conductor material
  • Deep-bar effect
  • Multiple-cage windings
  • Phase resistance
  • IEC/NEMA design letters
  • Speed-torque characteristics
• Wound-rotor
  • Winding construction
  • Wave-wound connections
  • Distribution factor and chord factor
  • Rotor phase voltage
  • Speed-torque characteristics

This webinar will benefit service center technicians and supervisors.

Carlos Ramirez
Especialista de Soporte Técnico de EASA

Este webinario cubrirá los fallos asociados con los motores trifásicos accionados con variadores electrónicos de frecuencia (VFDs) y como rebobinarlos, rebajando las posibilidades de fallos futuros. Los transitorios de voltaje producidos por los VFDs pueden deteriorar los aislamientos de los devanados y los fabricantes y los centros de servicios se han dado cuenta que los sistemas de aislamiento de estos motores se deben mejorar para ayudar a soportar su uso con VFDs. 
 
Los temas incluyen:

• Transitorios de voltaje
• Materiales inverter duty
• Procesos para lograr un devanado con aislamiento inverter duty
• Otros aspectos a considerar con relación a los cables y VFDs

 Este webinario es adecuado para bobinadores, supervisores e ingenieros.

Presented by Mike Howell, PE
EASA Technical Support Specialist

Manual calculations are tedious, time-consuming and error prone. Several calculators are available to logged-in members at easa.com that can save time and prevent errors. 

In this webinar, we’ll take a look at some of these calculators and work through some examples.

• How to access the calculators
• Working from different devices
• Practical examples

This webinar is intended for all personnel who currently spend time doing pen-to-paper calculations for things like wire packages, stator core loop tests, or coil grouping.

Presented by Chuck Yung
EASA Senior Technical Support Specialist

There are many bearing arrangements in vertical machines. This webinar expands on the 2024 convention paper and provides an overview of common different thrust bearing arrangements, with end play guidance tips for each.  

Topics include:  

• Single thrust bearing
• Multiple thrust bearings, all oriented thrust down
• Multiple thrust bearings with one thrust-up
• Vertical machines with lower sleeve guide bearing
• Vertical machines with hydrodynamic thrust bearing

This webinar is intended for owner-managers, shop supervisors, machinists, service center technicians, and safety directors.