Power lines are required to be protected from what hazards?

Power lines are required to be protected from what hazards?

• A. Lightning and short circuits
• B. Moisture and dust
• C. Overheating and rust
• D. Birds

Answer: (A)

Power lines are designed to withstand and control two major electrical hazards: lightning-induced surges and faults that cause short circuits. Lightning can generate extremely high voltages and transient currents that threaten insulation and equipment, so protective measures like lightning arresters and proper grounding divert or clamp those surges away from the line. When a fault occurs, such as a hot-to-hot or hot-to-ground short, very high fault currents can flow and damage equipment or start fires; protective devices like fuses and circuit breakers quickly interrupt these currents to limit damage. Environmental factors such as moisture and dust are concerns for equipment in general, but the protections specifically aimed at keeping lines safe and operable are for lightning surges and short-circuit faults.

Power lines are designed to withstand and control two major electrical hazards: lightning-induced surges and faults that cause short circuits. Lightning can generate extremely high voltages and transient currents that threaten insulation and equipment, so protective measures like lightning arresters and proper grounding divert or clamp those surges away from the line. When a fault occurs, such as a hot-to-hot or hot-to-ground short, very high fault currents can flow and damage equipment or start fires; protective devices like fuses and circuit breakers quickly interrupt these currents to limit damage. Environmental factors such as moisture and dust are concerns for equipment in general, but the protections specifically aimed at keeping lines safe and operable are for lightning surges and short-circuit faults.