CA2265863A1 - Current measurement methods and apparatus employing second harmonic scaling - Google Patents

Current measurement methods and apparatus employing second harmonic scaling

Info

Publication number
CA2265863A1
CA2265863A1 CA002265863A CA2265863A CA2265863A1 CA 2265863 A1 CA2265863 A1 CA 2265863A1 CA 002265863 A CA002265863 A CA 002265863A CA 2265863 A CA2265863 A CA 2265863A CA 2265863 A1 CA2265863 A1 CA 2265863A1
Authority
CA
Canada
Prior art keywords
current measurement
measurement methods
apparatus employing
harmonic scaling
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002265863A
Other languages
French (fr)
Other versions
CA2265863C (en
Inventor
Kenneth C. Shuey
Rodney C. Hemminger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elster Solutions LLC
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/908,208 external-priority patent/US5907241A/en
Application filed by Individual filed Critical Individual
Publication of CA2265863A1 publication Critical patent/CA2265863A1/en
Application granted granted Critical
Publication of CA2265863C publication Critical patent/CA2265863C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

A method for measuring an AC current in a conductor (10) in which a DC current also exists including the step of obtaining a first AC current measurement, obtaining a measure of a power factor, fundamental frequency component and second harmonic component (S2) and adjusting the first AC current measurement in accordance with an error value to obtain a corrected current measurement (S3, S4). The error value is determined as a function of the power factor, fundamental frequency component and second harmonic component.
CA002265863A 1996-09-11 1997-08-27 Current measurement methods and apparatus employing second harmonic scaling Expired - Lifetime CA2265863C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US71012796A 1996-09-11 1996-09-11
US08/710,127 1996-09-11
US08/908,208 US5907241A (en) 1996-09-11 1997-08-07 Current measurement methods and apparatus employing second harmonic scaling
US08/908,208 1997-08-07
PCT/US1997/015081 WO1998011447A1 (en) 1996-09-11 1997-08-27 Current measurement methods and apparatus employing second harmonic scaling

Publications (2)

Publication Number Publication Date
CA2265863A1 true CA2265863A1 (en) 1998-03-19
CA2265863C CA2265863C (en) 2003-01-07

Family

ID=27108381

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002265863A Expired - Lifetime CA2265863C (en) 1996-09-11 1997-08-27 Current measurement methods and apparatus employing second harmonic scaling

Country Status (2)

Country Link
BR (1) BR9711465B1 (en)
CA (1) CA2265863C (en)

Also Published As

Publication number Publication date
CA2265863C (en) 2003-01-07
BR9711465A (en) 1999-08-24
BR9711465B1 (en) 2010-04-20

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Effective date: 20170828