Switchgear
Switchgear controls, protects, and isolates electrical equipment. It ensures safe operation by interrupting faults and maintaining system stability.
Importance of Protection in Power Systems
Protection systems detect faults quickly, isolate faulty sections, prevent damage, and ensure safety and continuity of supply.
Components of Switchgear
Includes circuit breakers, isolators, relays, CTs, PTs, busbars, and surge arresters working together for control and protection.
Types of Switchgear (LV, MV, HV)
Classified by voltage levels: LV (≤1 kV), MV (1–36 kV), HV (>36 kV), each used for different applications.
Basic Working of Circuit Breakers
Detect fault → relay sends trip signal → contacts open → arc extinguished → circuit isolated.
Types of Circuit Breakers
Air, Oil, SF₆, Vacuum breakers based on arc quenching medium and application.
