US 6,982,650 B1
Method, system and apparatus for remote measuring of electrical power
Johan E. C. Asplund, Stockholm (Sweden)
Assigned to Iprobe AB, Johanneshov (Sweden)
Appl. No. 10/88,810
PCT Filed Sep. 22, 2000, PCT No. PCT/SE00/01843
§ 371(c)(1), (2), (4) Date May 09, 2002,
PCT Pub. No. WO01/22102, PCT Pub. Date Mar. 29, 2001.
Claims priority of application No. 9903447 (SE), filed on Sep. 23, 1999; and application No. 0000913 (SE), filed on Mar. 20, 2000.
Int. Cl. G08C 19/00 (2006.01)
U.S. Cl. 340—870.02 19 Claims
OG exemplary drawing
 
1. A method of measuring electrical power conducted through at least one electrical conductor, comprising the following steps:
sensing an electromagnetic field around said at least one electrical conductor at a measuring position, wherein said sensing is effected by means of an electrically conductive coil arranged around said at least one electrical conductor,
deriving current flowing through said at least one electrical conductor from said sensed electromagnetic field,
storing instantaneous values for said current in an electronic memory means powered by said electromagnetic field, and
transmitting digital information on said at least one electrical conductor to a transceiver provided at a distance from said measuring position, said digital information being representative of said instantaneous values.