GB1512539A - Electrical measuring instrument - Google Patents

Electrical measuring instrument

Info

Publication number
GB1512539A
GB1512539A GB4999075A GB4999075A GB1512539A GB 1512539 A GB1512539 A GB 1512539A GB 4999075 A GB4999075 A GB 4999075A GB 4999075 A GB4999075 A GB 4999075A GB 1512539 A GB1512539 A GB 1512539A
Authority
GB
United Kingdom
Prior art keywords
cos
sin
proportional
output
power
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.)
Expired
Application number
GB4999075A
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.)
ECKETT S
Original Assignee
ECKETT S
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 ECKETT S filed Critical ECKETT S
Priority to GB4999075A priority Critical patent/GB1512539A/en
Publication of GB1512539A publication Critical patent/GB1512539A/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
    • G01R21/006—Measuring power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/001—Measuring real or reactive component; Measuring apparent energy
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R7/00—Instruments capable of converting two or more currents or voltages into a single mechanical displacement
    • G01R7/12—Instruments capable of converting two or more currents or voltages into a single mechanical displacement for forming product

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

1512539 Measuring power S W ECKETT 1 Dec 1976 [5 Dec 1975] 49990/75 Heading G1U Power to a load 2, Fig. 1, is monitored by scaling 10 the voltage V by selectable 11 factors of sin# and cos#, by applying the scaled voltages Vsin# and Vcos# to a var meter 8 and a watt meter 6 respectively together with the load current I, and by arranging that the outputs of the var and watt meters are summed to provide a quantity proportional to VI(sin#sin# + cos#cos#) = VIcos(#-#), where # is the phase angle of the load current. Thus, by setting # equal to zero and ninety degrees in turn, the sum output will be proportional to watts and vars, and by setting # to maximize the output, the output will be proportional to apparent power VI.
GB4999075A 1976-12-01 1976-12-01 Electrical measuring instrument Expired GB1512539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4999075A GB1512539A (en) 1976-12-01 1976-12-01 Electrical measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4999075A GB1512539A (en) 1976-12-01 1976-12-01 Electrical measuring instrument

Publications (1)

Publication Number Publication Date
GB1512539A true GB1512539A (en) 1978-06-01

Family

ID=10454246

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4999075A Expired GB1512539A (en) 1976-12-01 1976-12-01 Electrical measuring instrument

Country Status (1)

Country Link
GB (1) GB1512539A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103983842A (en) * 2014-05-15 2014-08-13 国家电网公司 Substation power measurement error compensation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103983842A (en) * 2014-05-15 2014-08-13 国家电网公司 Substation power measurement error compensation method

Similar Documents

Publication Publication Date Title
US4182983A (en) Electronic AC electric energy measuring circuit
Ahn et al. The Joule heat production rate and the particle energy injection rate as a function of the geomagnetic indices AE and AL
AU633998B2 (en) Arrangement of electrical measurement
ES8608172A1 (en) Metering system for measuring parameters of high ac electric energy flowing in an electric conductor.
DE3174072D1 (en) Electronic device for recording reactive power and use of such a device
DE59203277D1 (en) Arrangement for measuring reactive power or reactive energy.
ES8405956A1 (en) Electronic counter for measuring active and reactive energy in a three-phase power system.
GB1512539A (en) Electrical measuring instrument
CA1079806A (en) Power measuring apparatus
GB886265A (en) Improvements in or relating to multiplying devices
GB1519787A (en) Apparatus for metering electrical energy
GB1483191A (en) Electricity meters
O'kelly et al. Reduction of voltage flicker of a simulated arc furnace by reactive compensation
SU855516A1 (en) Reactive power measuring method
JPS5218375A (en) Liquid conductivity meter
SU143149A1 (en) Device for assessing the efficiency of the work of consumers of electric energy
SU1596257A1 (en) Apparatus for measuring electric power
GB1537425A (en) Quarter-squares multipliers for measuring electrical energy
GB1389506A (en) Power measuring apparatus
GB1313511A (en) Apparatus for indicating power consumption
SU1638662A1 (en) Method for measuring the admittance components of three- phase symmetric relative to ground ungrounded power distribution system
GB1523235A (en) Wattmeters
Madhuri et al. Solar Powered Microwave Bench
LAVENTURE Measuring accurately single-phase sinusoidal and non-sinusoidal power[M. S. Thesis]
JPS5745468A (en) Pointer type resistance meter for electric blasting

Legal Events

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