Transformer Engineering: Design, Technology, and Diagnostics, Second Edition

Read a stitch in time book and the finding earth short by megger on insulation resistance testing and grounding. Sd Meyers has a good one on transformer oils but idr what its called. These two were both good as well for understanding diagnostics and what theyre actually testing. https://www.perlego.com/paid/book/1574836/transformer-and-inductor-design-handbook-pdf https://www.amazon.com/Transformer-Engineering-Design-Technology-Diagnostics/dp/1439853770 Ive yet to find a good one i like a out powerfactor testing and just use a doble 4000 class pp I have when I have to test something I dont do often. Like certain HV potential transformers are really not straight forward like a power and transmission transformer.