Watt hour meter registration calibration method and apparatus

Details Watt hour meter registration calibration method and apparatus Watt hour meter registration calibration method and apparatus

1997-07-14

2000-01-18

Ballato, Josie

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324138, G01R 1900

Patent

active

060160543

ABSTRACT:
A phase adjustment circuit is provided for use in an inductive drive utility meter that employs a current stator and a rotating disk. The phase adjustment circuit includes an impedance circuit and a first current limiting device. The impedance circuit has at least first and second terminals, and is disposed in a flux inducing relationship with the current stator such that the flux within the current stator induces a voltage across the first and second terminals of the impedance circuit. The first current limiting device has a first bias threshold, and is connected between the first and second terminals of the impedance circuit. The current limiting device is operable to inhibit current flow in a first direction through the impedance circuit based on whether the voltage induced on said impedance circuit exceeds the first bias threshold. The current flow through the impedance circuit then induces a compensation flux density component onto the current stator, which in turn affects registration of the meter.

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