Between a wind electric system and loads served by the premises electrical system, which device shall be installed to protect the premises?

Between a wind electric system and loads served by the premises electrical system, which device shall be installed to protect the premises?

• A. surge protective device
• B. voltage monitoring system
• C. thermal overload relay
• D. controller

Answer: (A)

Surge protection is what shields the whole premises from transient overvoltages. A surge protective device sits at the point where the wind-electric system feeds the building (service entrance or main panel) and clamps or diverts the energy of spikes caused by lightning or switching events away from the loads. This keeps voltage levels at a safe range for all downstream equipment, reducing damage and nuisance tripping. The device doesn’t affect normal operation or monitor voltage; it simply responds to overvoltage events to protect the system. The other options don’t provide this broad, protective function: a voltage monitoring system only watches voltage levels, a thermal overload relay protects motors from overheating, and a controller manages operation rather than providing surge protection.

Surge protection is what shields the whole premises from transient overvoltages. A surge protective device sits at the point where the wind-electric system feeds the building (service entrance or main panel) and clamps or diverts the energy of spikes caused by lightning or switching events away from the loads. This keeps voltage levels at a safe range for all downstream equipment, reducing damage and nuisance tripping. The device doesn’t affect normal operation or monitor voltage; it simply responds to overvoltage events to protect the system. The other options don’t provide this broad, protective function: a voltage monitoring system only watches voltage levels, a thermal overload relay protects motors from overheating, and a controller manages operation rather than providing surge protection.