Patent · US Active

Standalone self-supplied numeric controlled relay

US8502688B2 · kind B2 · utility

0Cited by

13References

20Claims

0Family size

Assignee

ABB TECHNOLOGY AG · CH

Inventors

Niraj Suthar · Sayla, IN
Vijay Shah · Sayla, IN
Maulik Vyas · Sayla, IN
Bernhard Deck · Wellheim, DE

Key dates

Filing date	Aug 16, 2010
Grant date	Aug 6, 2013
Priority date	—
Expiry date	Feb 9, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02H3/105
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The disclosure relates to a process of configuring a standalone self-supplied numeric controlled relay for providing phase and earth over current protection to electrical systems by accurate current measurement. The arrangement for current measurement with control algorithms is provided for power control by providing amplified and conditioned current for optimization between the current to power an electronic circuit and the fidelity of a measured current waveform so that they both are at the acceptable levels at the same time. This disclosure describes the current sensing and associated algorithm for power control in a truly self-powered relay.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.