Drop Testing of Fields and Synchronous Poles: Tips to Interpretation
This presentation covers the basics of drop testing, as well as offers tips for interpreting the results. Both the AC and DC drop test are described as well as the advantages and drawbacks for each.
For those cases where the drop test results are out of tolerance, this material will guide the technician in determining the reasons for the variation-how to recognize the difference between shorted coils and differences in iron, airgap or other influences. Rewind and assembly tips will also be discussed, where they influence the results of the drop test.
This presentation is most useful for service center and field technicians with at least 5 years experience, service center managers, engineers, or anyone involved in DC motor or generator repair, as well as those who are simply looking to expand their knowledge.