SEARCH THE RESOURCE LIBRARY
WATCH NOW
REGISTER FOR UPCOMING TRAINING
LEARN MORE BUY A SUBSCRIPTIONVIEW/MANAGE ENROLLMENT INFOGO TO THE LEARNING CENTER
VIEW YOUR PURCHASED TRAINING
Need an Accredited service center?Find a service center that has proven they repair electric motors in accordance with ANSI/EASA's AR100.
VIEW THE LISTLEARN MORE ABOUT THE PROGRAM
DOWNLOAD ACCREDITATION CHECKLISTACCREDITED? VIEW YOUR RECORDS
Reserve Your Room & Register
It's not too early to reserve your room at EASA's official 2024 hotel. Don't wait to save your place at the 2024 Convention & Solutions Expo.
RESERVE ROOM REGISTER TO ATTEND
Engage locallyEASA's international membership is divided into 10 Regions that are made up of 32 Chapters.
EXPLORE CHAPTERS & EVENTS NEAR YOU
CHAPTER OFFICER RESOURCES
SEARCH THE ONLINE STORE
CUSTOM BRANDED PRODUCTSDOWNLOADS YOU HAVE PURCHASEDVIEW YOUR PURCHASED TRAININGVIEW CONVENTION RECORDINGS
Chuck Yung EASA Technical Support Specialist
When rewinding motors rated 6 kV and above, there are certain steps beyond the normal rewind procedures used for 2.3 kV/4 kV machines. Whether a machine is to be VPI processed makes a difference in how the winding should be treated.
Aside from the obvious issues of insulation and higher voltages, there is also the possibility of partial discharge (PD), which brings its own unique set of problems. Air is an electrical insulator, albeit one of inconsistent quality. Increased humidity lowers the dielectric breakdown voltage of air, so an air gap that might be adequate under dry conditions may prove inadequate when the humidity is high (Table 1). Even though a form coil is fully taped, sealed and processed, the presence of air in voids within the coils, or between the coil and ground (i.e., in the slot) can cause problems with PD.
LOGIN TO VIEW AND DOWNLOAD THE ARTICLE