Recently, technology of simultaneous wireless power transmission (WPT) for multiple receivers has reported. In multiple-receiver WPT system, optimum load impedance in receivers for maximizing power transmitting efficiency has analyzed, and power distribution method has also proposed. Electromagnetic field simulation and equivalent circuit analysis are employed in these researches. Equivalent circuit has to be combination of concentrated/distributed constant circuits when transmitting coupler enlarges in order to widen feeding area. This presentation builds equivalent circuit model of large-scale WPT system using parallel line feeder coupling with multiple receivers, and experimentally investigates its characteristic.