Course Description
EASA’S newest technical seminar covers horizontal and vertical squirrel cage induction motors in the 300 to 5,000 horsepower range, low and medium voltage. Many of the principles covered will apply to other sizes and technologies, as well. While the focus primarily is on motors built to NEMA standards, much of the material is also applicable to IEC motors. This seminar was produced by Austin Bonnett, EASA’s education and technology consultant.
Seminar Leader
Chuck Yung is a technical support specialist at EASA Headquarters in St. Louis. Prior to joining EASA, he held various positions in the electrical apparatus sales and repair industry for 25 years. He regularly contributes technical articles to EASA’s newsletter, CURRENTS, and various trade publications.
Partial List Of Topics
Motor Basics
- Motor theory
- Equations
Applications
- Pumps
- Compressors
- Fans/Blowers
- Material handling
Motor Manufacturers
- Domestic
- Foreign
Motor Types
- Enclosure
- Custom
- Functions
Large Motor Standards
- NEMA
- IEC
- IEEE
- API
Safety Considerations
Root Cause Failure Analysis
Test & Inspection Procudures
- De-energized and energized
- Loaded
- Locked rotor
Motor Starting
- Across the line
- Part winding
- Reduced voltage
- Wye-Delta
Accessories
- Windings
- Vibration monitoring
- Surge protection
- Current differential transformers
- Power factor correction
Stator Construction
Rotor Construction
Bearing Types and Lubrication Systems
Shaft Construction
Motor Geometry and Alignment
Repair Procedures
Who Should Attend
This seminar will benefit owners, supervisors, and shop mechanics, as well as field service personnel whose duties include installing and repairing large AC motors.