CA2021092A1 - Electronic watthour meter - Google Patents

Electronic watthour meter

Info

Publication number
CA2021092A1
CA2021092A1 CA2021092A CA2021092A CA2021092A1 CA 2021092 A1 CA2021092 A1 CA 2021092A1 CA 2021092 A CA2021092 A CA 2021092A CA 2021092 A CA2021092 A CA 2021092A CA 2021092 A1 CA2021092 A1 CA 2021092A1
Authority
CA
Canada
Prior art keywords
meter
electrical energy
metered
processor
value
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
CA2021092A
Other languages
French (fr)
Other versions
CA2021092C (en
Inventor
Warren Ralph Germer
Maurice Joseph Ouellette
Bertram White
Mehrdad Negahban-Hagh
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.)
Silicon Systems Inc
General Electric Co
Original Assignee
Warren Ralph Germer
Maurice Joseph Ouellette
Bertram White
Mehrdad Negahban-Hagh
General Electric Company
Silicon Systems, Incorporated
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
Application filed by Warren Ralph Germer, Maurice Joseph Ouellette, Bertram White, Mehrdad Negahban-Hagh, General Electric Company, Silicon Systems, Incorporated filed Critical Warren Ralph Germer
Publication of CA2021092A1 publication Critical patent/CA2021092A1/en
Application granted granted Critical
Publication of CA2021092C publication Critical patent/CA2021092C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/08—Circuits for altering the measuring range
    • G01R15/09—Autoranging circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters

Abstract

An electronic watthour meter is digitally configurable to operate as several different types of watthour meters for metering electrical energy from a variety of different electric utility services. Automatic scaling of line input currents is provided to scale the voltage input to an analog to digital converter over selected ranges such that low level and high level input signals are measured in an optimum range. A digital signal processor is employed to calculate values for metered electrical energy and output pulses, each proportional to a quantum of energy flowing in the circuit being metered. The processor calculates the value of DC offset errors inherent in the various analog circuits of the meter and uses that value in the calculation of metered electrical energy to compensate for such offset errors. The meter employs automatic and manually initiated test functions for testing the operation of the processor and other critical circuits in the meter.
CA002021092A 1989-09-25 1990-07-12 Electronic watthour meter Expired - Fee Related CA2021092C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US412,359 1989-09-25
US07/412,359 US5059896A (en) 1989-09-25 1989-09-25 Electronic watthour meter

Publications (2)

Publication Number Publication Date
CA2021092A1 true CA2021092A1 (en) 1991-03-26
CA2021092C CA2021092C (en) 2000-02-15

Family

ID=23632683

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002021092A Expired - Fee Related CA2021092C (en) 1989-09-25 1990-07-12 Electronic watthour meter

Country Status (2)

Country Link
US (2) US5059896A (en)
CA (1) CA2021092C (en)

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Also Published As

Publication number Publication date
CA2021092C (en) 2000-02-15
US5059896A (en) 1991-10-22
US5325051A (en) 1994-06-28

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