Patent Number: 6,297,940

Title: Protection system for devices in an electrical distribution network

Abstract: A computer-implemented protection system is used in a multi-phase electrical distribution network. The system includes a sensor operable to measure an impedance of a device connected to a phase of the distribution network. The device improves coupling of electrical potential from a source to a load. The system also includes a processor connected to the sensor and programmed to receive an impedance measurement from the sensor. The processor automatically calculates a variation in impedance of the device, the variation being based on a ratio of the impedance measurement and a previous impedance measurement. The processor automatically performs a protection analysis of the device based on the impedance variation.

Inventors: Wu; Shawkang (Muskego, WI)

Assignee: McGraw Edison Company

International Classification: H02H 3/40 (20060101); H02H 7/18 (20060101); H02H 1/00 (20060101); H02H 1/04 (20060101); H02H 003/18 ()

Expiration Date: 10/02/2018