Patent ID: 9274149
Filing Date: 2016-03-01
CPC Classification: G01R,G06F

Claim Text:
1. An apparatus comprising: a device configured to monitor operation of a three phase system, the device including: a circuit that maximizes a signal-to-noise ratio of a measurement associated with the monitoring, the circuit including a filter configured to retain a fundamental frequency of the three phase system and remove other frequencies; and a monitor to generate a message that provides a status of the three phase system based on an output of the circuit, wherein the circuit is configured to generate three vectors, each vector corresponding to a difference of two of the three phases of the three phase system or the magnitude of each phase relative to a common reference, and a first gain associated with two of the three vectors is the same, and a second gain associated with a third of the three vectors is different from the first gain or a combination of gains which results in a rotating vector.