The article tackles upon mechanisms of load optimization in the electrical circuit diagram aimed for reducing energy costs and tariffs. The grid company's cost minimum correlates with the criteria of equality of the sum of relative increase of network maintenance and energy loss costs. From the point of efficiency improvement the process connection tariffs are proposed to be differentiated by node relative increases. Low process connection tariffs should attract new consumers to the nodes with available capacity reserves and low losses. In overloaded nodes with low reserves and high losses the process connection tariffs are not attractive due to high values. Feasibility of the approach is shown via numerical examples.