A viewer asked, "Why do we need to short the windings for the Power Factor test, but we don't for Megger (Insulation resistance)?" When testing large power transformers or distribution transformers for acceptance and maintenance, there's a lot of things we do which don't make sense on the surface.
I try to break that down in understandable terms, with just enough math to make it sound legit! The main reason is that Megger is a DC test and Power Factor is an AC test. The Tesla Vs. Edison debate never ends.
If you've got an idea for a video or a question you're too afraid to ask anyone else, let me know! It might be the topic of my next video.
Chapters:
0:00 - Intro
1:10 - Megger vs PF Overview
3:22 - Transformer example
4:11 - Megger test conceptualized
9:05 - Power Factor test conceptualized