Cold load pickup can involve current flows of up to what maximum levels?

Cold load pickup refers to the phenomenon that occurs when electrical customers are restored after a power outage, causing significantly high demand for electricity as devices that were off during the outage suddenly turn on. This can lead to a temporary surge in current that can be several times higher than the normal operating current level.

The correct option indicates that current flows can reach levels of 10 or more times normal. This happens because after a prolonged outage, many electrical devices such as heaters, air conditioners, and other appliances attempt to start simultaneously, resulting in a large inrush of current that can be ten times or more the normal load. This situation poses a unique challenge for the electric grid and can lead to equipment damage if not managed correctly.

The other options suggest lower maximum current levels that do not accurately reflect the range seen during typical cold load pickup scenarios. Understanding this concept is crucial for utility companies to ensure they implement appropriate protective measures and planning to mitigate the risks associated with these high inrush currents during the restoration of service.