JAMES F SMITH
Chiropractic in Bethlehem, PA
License number
New Jersey 38MC00142000
Expiration Date
Aug 31, 1991
Category
Chiropractic Examiners
Type
Chiropractor
Address
Address
Bethlehem, PA
Professional information
Matching Overcurrent Characteristic Curves
US Patent:
5856903, Jan 5, 1999
Filed:
Nov 12, 1997
Appl. No.:
8/968363
Inventors:
James J. Smith - Bethlehem PA
Assignee:
General Electric Company - Schenectady NY
International Classification:
H02H 709
US Classification:
361 96
Abstract:
A method for configuring a digital overcurrent relay to provide a plurality of selectable time overcurrent characteristic responses corresponding to a plurality of target curves. According to one embodiment, a template curve is selected from the plurality of target curves, and a scaling factor is generated for each remaining target curve, wherein the relay comprises means for generating approximated curves from a given template curve and a given scaling factor. It is determined whether each approximated curve is within a threshold amount of total error with respect to its corresponding target curve. If any approximated curves are above the threshold amount, then a further template is selected from the plurality of target curves, and scaling factors are again generated and adjusted for the further template curve, until no approximated curves are above the threshold amount.