“…; P bp -bubble point pressure, Pa; P ESP -the power required to drive the ESP, W; P SEM -active power consumed by the SEM, W; Q SEM -the reactive power consumed by the SEM, VAR; ∆U CL -voltage loss in the cable line, V; P CL -active power on the HV side of the transformer, W; Q CL -reactive power on the HV side of the transformer, VAR; ∆U T -voltage loss in the transformer, V; P T -active power on the LV side of the transformer, W; Q T -reactive power on the LV side of the transformer, VAR; P ESPI -active power of ESP installation, W; Q ESPI -reactive power of ESP installation, VAR. Unlike the known approaches [4,5,[7][8][9][10][11][12][13][14][15][16][17], the ILS approach provides regular (fixed in enterprises' standards) monitoring, diagnostics and analysis of the technical condition of the structural elements of the ETC. It will also make it possible to evaluate the efficiency of the operation of the ETC in order to verify the compliance of the actual and calculated values of their characteristics.…”