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EASA Technical Manual now available in German

EASA Technical Manual now available in German

The EASA Technical Manual is without question the most valuable resource available for companies that sell, service, repair or rebuild AC and DC electrical apparatus, including motors, generators, transformers and electronic drives. Published by the Electrical Apparatus Service Association (EASA), this vital document has now been translated into German to meet the needs of EASA members in Germany and elsewhere.

According to the chairman of EASA’s Technical Services Committee, Thomas H. Bishop, P.E., the EASA Technical Manual “provides a single source of useful and diverse technical information” to help EASA members solve the tough technical problems they face each day, whether that involves repairing equipment or redesigning it for more efficient operation in an existing or new application. “Its ultimate purpose,” Bishop said, “is to enable EASA members to deliver quality repairs that ensure the customer’s equipment will operate efficiently and reliably.”

What makes it so valuable?
What makes the EASA Technical Manual such a valued asset for EASA members? The answer is simple. It’s the one place where they can quickly find accurate technical information on everything from bearing dimensions, fits and tolerances to recommended welding cable ampacities, from machine frame sizes and dimensions to torque and efficiency ratings–without taking the extra time and effort to look it up in various standards documents or other engineering references. If there’s a question about vibration limits or terminal markings and connections, it’s easy to find the answer in the Technical Manual. Need to convert AWG to metric wire size, or vice versa? Just check the manual’s round magnet wire chart. Even high-potential AC and DC test voltages and scenarios for different types of machines are laid out in an easy-to-use graphic form.

The Technical Manual also contains dozens of practical articles, specifications, tips and procedures that cover the gambit of electrical apparatus service, repair, redesign and application, including electrical testing and mechanical repair, vibration analysis and balancing, and electronic (variable-speed) drives. It also incorporates entire sections on DC machines and transformers.

To provide ready answers to customer concerns about motor efficiency, the manual also includes a recap of the 2003 EASA/AEMT study, “The Effect of Repair/Rewinding on Motor Efficiency,” as well as the “Guidelines for Maintaining Motor Efficiency During Rebuilding” that are based on that study. Additionally, the manual contains many useful forms for taking winding data and tracking jobs through the service center.

A brief scan of the table of contents indicates the breadth and depth of the technical information the manual’s 925 pages contain:

  1. Machine Identification & Bearing Information
  2. AC Machines
  3. DC Machines
  4. Transformers
  5. Electronics
  6. Magnet Wire & Lead Wire
  7. Electrical Testing
  8. Bearings
  9. Lubrication
  10. Mechanical
  11. Formulas and Conversion Factors
  12. Tech Notes
  13. Glossary

The convenience of this resource would mean little if the information were unreliable. The EASA Technical Manual is thoroughly vetted thanks to an ongoing review process. Although much of this is staff-driven, EASA’s Technical Services Committee also peer reviews the manual.

The EASA Technical Manual is available to all EASA members as a free download in both English and German at To learn more about the benefits of EASA membership or EASA’s European & World Chapter, please contact Mr. Frederic Beghain at