Power system protection: basic principles and aspects. Protection system components, electromechanical relays, solid state relays and digital relays. Current and voltage transformers. Steady state and transient analysis of current transformers. Overcurrent relays: directional and non-directional relays. Distance protection basics. Communication-based pilot distance relays schemes. Load encroachment and power swings. Differential protection: Generator, line, bus-bar, and motor. Generator protection: differential, overcurrent, V/Hz, and loss of potential. Fuses: mechanisms and short circuit interruptions. Circuit breakers: construction and classifications.