Wireless Load Self-Disconnection Module For Automatic Power Supply System

Nowadays, the use of Auxiliary power supply (APS) systems to energize low power rating appliances (e.g. televisions, water dispensers, etc.) and lighting (e.g. CFL lamps) has become pervasive in countries where long power rationing schemes are applied. Although the existing APS systems offer overload protection, it cannot be directly connected to the existing electric circuit unless heavy loads such as refrigerators, microwaves, washing machines, electric water heaters, etc. are disconnected in the absence of the grid. This is usually overcome by separating the wiring circuits feeding these loads from those devoted for lighting and other low power loads like TV and stereo sets, food processors, etc. However, such a separation is very costly and sometimes infeasible in places with narrow wires tubing circuit if a new by side wiring circuit is to be installed. This paper details a module developed from on-shelf cheap components to wirelessly make heavy loads disconnect themselves as soon as the grid is off. The core idea behind our load self-disconnection module is inspired by the low price remote power plugs which use the 434MHz Radio Frequency (RF) technology to remotely on/off as many as 256 electric appliances up to a 30M distance away. Thus, no transmission obstacle, wide coverage and no nearby products interference are achieved as results.