Switchgear and Protection Meaning of Switch gear, Types-Indoor type and Outdoor type, Essential features of Switchgear, List most commonly used Switchgear equipment and Protective Devices for switching and interruption of current. Importance of power system protection and Necessity of Protective Devices. Sources of Faults, Types of faults, Harmful Effects of short circuit current, Symmetrical and unsymmetrical faults on three-phase systems. Sources of Faults, Types of faults, Harmful Effects of short circuit current, Symmetrical and unsymmetrical faults on three-phase systems.