In a village, town, or regional power distribution system, high-voltage circuit breakers are installed at distribution substations and along main feeder lines. These circuit breakers control the flow of electricity to large areas and automatically disconnect power during faults, such as:

• Overload conditions
• Short circuits
• Equipment failure
• Natural disturbances (e.g., lightning strikes)

These breakers operate at medium to high voltage levels (e.g., 11kV, 33kV, 132kV) and are crucial in grid stability and fault isolation.