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This paper, presented at the 2013 EASA Convention, presents a generic product quality planning process for industrial motor stator windings rated 13.8 kV. Emphasis is placed on analyzing gaps between a 4 kV rewind and a 13.8 kV rewind as they relate to stator winding design, insulation system validation and process control.
Increasingly, it is not enough to just “fix” that pump. Customers want and need to understand the “why” behind the failure. The pump failure case study walks you through that process.
This paper, presented at the 2013 EASA Convention, will examine Power Factor Tip-up and Partial discharge testing to assess stator winding conditions for motors rated 2300 V and above. Both tests will be evaluated for: effectiveness; which windings/types of machines the test is effective; set-up; interpretation and limitations.
Whenever an application engineer is planning on installing adjustable speed drives for AC motors, line current harmonics and reflected waves are two factors that need to be addressed. This paper, presented at the 2013 EASA Convention, deals with understanding IEEE Std 519 and various mitigation methods in order to meet those recommendations. It also reviews the types of filtering that is available to reduce the reflected waves seen at the motor terminals.
Even though they comprise a small portion of electric motors in service, wound rotor motors are disproportionately represented in EASA’s tech support call volume. There are several misconceptions about how they work. This paper will describe how they are applied and explain several simple but critical tests for the repairer.
The ability to measure machinery vibration is essential to machinery repair. But vibration is a complex phenomenon, with multiple parameters. So unlike temperature, pressure or other single parameter indicators, to use vibration as an effective machine condition indicator, technicians need more than simple meter and 5 minutes of instruction.
Is the induction motor the preferred answer in industrial drive applications? What is happening to the synchronous, DC and wound rotor motor (WRM) in those applications?
Learn from an industry veteran about safety topics you may think you know but that can cost your firm substantially if you’re not diligent.
This paper, presented at the 2013 EASA Convention, summarizes the accepted and other electrical tests required by motor and generator end users.
This paper, presented at the 2013 EASA Convention, provides an overview of NFPA 70E and gives safety guidance on the hazards of arc flash and arc blast.
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 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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