US Patent 9766670 Managing power to electrical systems

A data center includes rack computing systems, electrical power system, and a circuit control device. The rack computing systems may include a rack and computing devices coupled to the rack. The electrical power system supplies power to computing devices in the racks. Each electrical power system may include overcurrent protection devices that protect computing devices in the rack computing systems from overcurrent conditions. The circuit control device is coupled to the overcurrent protection devices. The circuit control device can trigger the circuit protection devices to shed loads on the electrical power system from computing devices in the rack computing systems.