Have you ever noticed that the fraction in the formula for base changing per unit (or percent) impedance appears to be upsidedown? For example, when compared to the standard per-unit base change formula shown below, the new base and the old base appear to have switched places: In this article, I’m going to show you that […]
Per Unit Example – How To, Tips, Tricks, and What to Watch Out for on the Electrical Pe Exam
There is a lot of confusion surrounding the per unit system, and rightfully so. If you’ve never used it before, it is easy to become confused with all of the individual pieces that make the system work. To help clear things up, here is an in-depth break down on an example question that is similar to […]
Base Impedance – Do We Use Single Phase or Three Phase Values to Calculate?
Related Article: Try our fully worked out Per Unit Example with the following free article: Electrical PE Review – Per Unit Example: Tips, Tricks, and What to Watch Out for Imagine you come across a three phase system with per unit impedances and you need to calculate the actual value in ohms: […]