Patent ID: 7180282
Filing Date: 2007-02-20
Classification: G01R,H02M

Abstract:
1. An electric energy meter for measuring electrical energy usage over a wide dynamic range of standard service voltages, wherein the electrical energy meter is used by an electric utility for customer billing purposes, and wherein the electrical energy meter can be connected to a polyphase electrical service to measure electrical energy on more than one phase, the meter having a power supply comprising: a transformer having first, second, and third windings, the power supply being capable of receiving any input voltage within the wide dynamic range of standard service voltages, which input voltage is provided to the first winding so that current flows through the first winding, wherein a voltage across the second winding defines an output of the power supply, wherein a voltage across the third winding defines a sense signal that is representative of the output of the power supply, and wherein the output is regulated based at least in part on the sense signal to provide a predetermined output voltage independent of the input voltage, and wherein the wide range of service voltages include RMS voltages between about 96 Vrms and about 528 Vrms.