This course focuses on the application of protective devices on a distribution system. In this two-day class, you will cover the best practices for protecting transformers and equipment while maintaining the highest reliability possible. To begin, the protection of substation transformers, as well as coordination with distribution feeders and downline devices, will be presented. You will work through the application considerations of circuit breakers, relays, reclosers, sectionalizers, and fuses; and the methodologies to verify source impedances for system models, the effect of transformer connections on fault current calculations, and the concept of assumed fault impedance.