zs2000-j series public electric power use control device is used on the conditions when several users use a watt-hour meter together. it can be fixed with common watt-hour meter; no need to change structure and outside shape, just adds ac contactor. an intelligent fee charging control system (one meter with multi cards) is formed. several ic card users can use one controller, and it controls every user according to the information contained in the card. electric charge is prepaid, otherwise power is cut off automatically, and thus related disputes are effectively avoided