Class 5 of 8: Introduction to Differential, Distance, Directional, Voltage and Frequency Protection. This self-paced class covers differential (87) with slope and harmonic restraint, distance (21) zones, directional (67/32), voltage (27/59/47/60) and frequency (81) protection, and what technicians check for each, plus a field walkthrough and a case study. It has about 45 minutes of lesson content plus activities and a 30-question quiz. It is part of the SubstationU.com Protective Relaying Series (Level 1 course). Continuing education credit: 0 (none awarded yet).
Read the lesson book and complete the video activities, then pass the 30-question quiz with 80% (24 of 30) or better; you can retake the quiz as many times as you need until you pass. Each of the eight classes is a separate course, and the recommended order is Class 1 to Class 8, but you can take them in any order.