For the decision of problems energy conservation it is necessary to have the proved norms of a current consumption. In production schedules the norm of the specific charge of the electric power on a unit of production is established, however it does not reflect an actual condition of electric equipment. At the established pace of manufacture (in a stationary mode) casual deviations of parameters of a mode from their average values are inevitable. Therefore it is expedient to establish "band" norms of power consumption. While in service there are also the irregular deviations caused by infringements of technological process. In this connection from experimental records (diagrams) of parameters of a mode it is required to allocate stationary components.
     Power consumption it is caused by output V. Therefore, first of all, it is allocated stationary component of process V (t). Qualitatively the idea of allocation was stated cand.tech.sci. Brusentsovym L.V. also is quantitatively proved in DNTU. As average value Vc is accepted the value dividing alf-and-half the big and small ordinates of the experimental diagram. It is considered, that the big values correspond to a stationary mode, and small turn out balancing big concerning average value. Thus, stationary component is balanced process V (t). As the maximal allowable value Vmax is accepted greatest of experimental values. The minimal allowable value Vmin is defined by symmetric display concerning average value:
    
     Vmin = 2Vc - Vmax . (1)
    
     Ordinates < Vmin are underproduction of production.
     Till now the method of balancing applied and to process W (t) the charge of the electric power. In the Report for February 1996 " The technique of definition of rational modes of power consumption " gave developed in DNTU. Practice of application of this technique showed, that separate consideration of the statistical data on output V (t) and to the charge of electric power W (t) didn’t provide reproduction of actual dependence of specific charges from output. The technique assumed here proceeds from this dependence.
     In a stationary mode the range of change of power consumption is insignificant in comparison with average value Wc that allows to accept linear dependence
    
     W =V + (2)
    
     with constant factors and . Then specific charges are defined by expression
    
     ρ = W / V = + / V. (3)
    
     Factors are by approximation of skilled values , or , expressions (2) or (3).
     Band norms of a power consumption are defined on norms of output:
    
     Wmin,max =Vmin,max + . (4)
    
     As an example on rice 1 results of approximation for one of mines of Donbass where all sizes are expressed in relative units are shown.
    
     Figure 1 - Specific charges of the electric power
     Horizontals Wmin and Wmax on the diagram of a power consumption divide it into three areas. Borders of an allowable range of change of output defined under characteristics of normal distribution, and borders of an allowable range of change of consumption of energy carriers defined on a range of dependence of specific charges of energy carriers from output. Emissions for the top horizontal represent sites with the over expenditure of the electric power. Between horizontals the area of acceptable power consumption settles down. Failures for the bottom horizontal where < Wmin , it is impossible to count sites of the electro-savings as they concern to modes of underproduction of production.
     Actions for the electro-savings, which not touching technological process, do not change band norms of output. Factors b (1) change only, that conducts to narrowing a range of deviations new stationary components. The difference between total charges of the electric power before introduction of the specified actions defines efficiency of the electro-savings.
     The over expenditure of the electric power can be estimated and under specific charges of the electric power. However in this case there are difficulties in definition of band norms. Really, by virtue of linearity of expression (2) probabilities of output for levels Vmin,max and Wmin,max are identical. If to define band norms under the formula
    
     = + /Vmax,min , (5)
    
     That probabilities will be others. In result the estimation of power consumption will not be correct.
     Overcoming of these difficulties probably with in the framework of theoretical model when casual processes of output and charges of the electric power are considered normal. On any of them the probability of emission for the top level which is equal to probability of a failure for the bottom level is defined. Then is probable distribution of specific charges which differs from normal.
     Borders of an allowable range of change of output are defined under characteristics of normal distribution. Underproduction of production is values of output, smaller the bottom border of a range. Borders of an allowable range of change of consumption of energy carriers are defined on a range of change of production and dependence of specific charges of energy carriers on output. The over expenditure are the values of a power consumption exceeding the top border of a range. Stationary components and for other energy carriers are similarly allocated: gas, pairs and another.