POWER METER WITH DISPLAY OF POWER CONSUMED AND COST OF POWER CONSUMED

摘要

A power meter which is able to display the power consumed and the cost of power consumed over any given period. This device provides a continuous measurement of the electrical power consumed which gives a more accurate measurement than measurement at discrete intervals of time. Preferably the power meter of the present invention continuously converts the measured electrical power consumed by the load into a pulse train with its frequency proportional to the rate of power consumed, and utilises programmable digital frequency dividers (10) to provide signals to display (17) the power consumed and the cost of power consumed.