GB2015177A - Maximum demand electricity meter - Google Patents

Maximum demand electricity meter

Info

Publication number
GB2015177A
GB2015177A GB7906755A GB7906755A GB2015177A GB 2015177 A GB2015177 A GB 2015177A GB 7906755 A GB7906755 A GB 7906755A GB 7906755 A GB7906755 A GB 7906755A GB 2015177 A GB2015177 A GB 2015177A
Authority
GB
United Kingdom
Prior art keywords
counter
count
period
metering
rate
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
GB7906755A
Other versions
GB2015177B (en
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.)
General Electric Co
Original Assignee
General Electric Co
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 US05/881,503 external-priority patent/US4199717A/en
Priority claimed from US05/881,741 external-priority patent/US4179654A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB2015177A publication Critical patent/GB2015177A/en
Application granted granted Critical
Publication of GB2015177B publication Critical patent/GB2015177B/en
Expired 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
    • G01R21/1333—Arrangements for measuring electric power or power factor by using digital technique adapted for special tariff measuring
    • G01R21/1338—Measuring maximum demand

Abstract

The system includes a pulse initiator (39) for measuring the rate at which electrical energy is transmitted through the metering system and for generating pulses having a repetition frequency proportional to that rate. Two digital counters (63) and (65) are connected to receive and count the pulses. Counter (63) is operable to be reset and to restart the count at the beginning of each of a series of equal demand intervals as determined by timing means (11, 49, 51). The counter (65) is enabled to count only when the count stored therein is equal to the count stored in counter (63) as determined by a compare circuit (67), so that the counter (65) is caused to store the maximum count ever registered in counter (63) during the metering period as a measure of maximum power demand during that period. The counter (65) is resettable by a switch (41) at the end of the metering period.
GB7906755A 1978-02-27 1979-02-26 Maximum demand electricity meter Expired GB2015177B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/881,503 US4199717A (en) 1978-02-27 1978-02-27 Time of day demand metering system and method
US05/881,741 US4179654A (en) 1978-02-27 1978-02-27 Demand meter including means for selectively controlling the length of demand intervals

Publications (2)

Publication Number Publication Date
GB2015177A true GB2015177A (en) 1979-09-05
GB2015177B GB2015177B (en) 1982-07-14

Family

ID=27128625

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7906755A Expired GB2015177B (en) 1978-02-27 1979-02-26 Maximum demand electricity meter

Country Status (4)

Country Link
JP (1) JPS54139586A (en)
FR (1) FR2418446A1 (en)
GB (1) GB2015177B (en)
WO (1) WO1979000664A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5049810A (en) * 1989-09-22 1991-09-17 Landis & Gyr Metering, Inc. Watt-hour meter cover with battery hatch reset switch and optical communication port

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2139821A (en) * 1936-05-08 1938-12-13 Sangamo Electric Co Combination meter and time switch
US3913014A (en) * 1974-06-13 1975-10-14 Westinghouse Electric Corp Demand meter for on-peak maximum demand metering
US4050020A (en) * 1976-09-17 1977-09-20 General Electric Company Multiple rate electrical energy metering system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5049810A (en) * 1989-09-22 1991-09-17 Landis & Gyr Metering, Inc. Watt-hour meter cover with battery hatch reset switch and optical communication port

Also Published As

Publication number Publication date
JPS54139586A (en) 1979-10-30
FR2418446A1 (en) 1979-09-21
GB2015177B (en) 1982-07-14
WO1979000664A1 (en) 1979-09-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee