Class 6 of 8: DC Control and Trip Circuits, Lockout (86) and Breaker Failure (50BF). This self-paced class covers station DC systems, breaker trip and close circuits, 52a/52b, anti-pump, indicating lights, trip circuit supervision, 86 lockout and 50BF breaker failure, and DC elementary troubleshooting, 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.