Electrical assembly for an electric arc furnace

The system has a static var compensator and a control unit for controlling the compensator. A control parameter is changed within a preset control parameter range. A limited control parameter partial range is predetermined for the control parameter. An operating unit adjusts the control parameter within the control parameter partial range. The control unit controls electrodes and a furnace switch of an electric arc furnace. A display unit reads adjusted values for individual parameters. A recording unit detects mechanical and/or electrical stresses of individual system components. An independent claim is also included for a method for operating an electrical system.