Understanding how to perform electrical fault calculations is not necessary if your primary goal is to simply test relays. However, if you want to truly understand the electrical systems, how relays work, and why they do the things that they do; understanding electrical fault calculations is an excellent starting point. This video is an excellent guide to fault calculations without sequence components. After watching this video you will be able to understand:
- Why the magnitude of fault current changes during a fault
- Why the voltage changes during a fault
- Why the phase angles changes during a fault
If you’ve ever been reading a textbook on how faults are calculated, or why the phase angle changes during a fault, or why everything changes during a fault; this is an excellent primer that goes through the fault calculation process step-by-step which will help you get the basic concepts that are hard to grasp in a textbook.
Go to http://youtu.be/xO27n8D1E3U to watch the video.