Who is responsible for controlling the power system at voltages of 600V and above?

The individual responsible for controlling the power system at voltages of 600V and above is the power dispatcher. This role typically involves the management of the electrical grid and ensuring that the supply and demand of electricity are balanced. The dispatcher oversees high voltages and maintains operations to ensure safety, reliability, and efficiency in the power distribution system. They communicate with field personnel and make real-time decisions to prevent outages or disturbances in service.

The other roles, while important in their respective functions, do not have the same level of responsibility for the overarching control of high-voltage systems. Groundsmen primarily focus on ensuring safety and maintenance of equipment, lineworkers handle the installation and repair of power lines, and electrical engineers generally involve themselves in design and development of electrical systems rather than direct control of power flow. Thus, the power dispatcher's role is critical in managing and controlling high-voltage power systems.