Resumen
The in the total conducted theoretical researches a model for description of change of form of sliding contacts in the process of exploitation of electric city transport is got, as a system of differential equalizations for definite initial conditions. Deciding this system, taking into account geometry of the initial state of insertion of current receiver, it is possible to get relocation bias by which it is possible to define the well-educated section of insertion of current receiver at the proper run of electric city transport.