GB670536A - Improvements in and relating to alternating current electric measuring circuit arrangements - Google Patents

Improvements in and relating to alternating current electric measuring circuit arrangements

Info

Publication number
GB670536A
GB670536A GB2083649A GB2083649A GB670536A GB 670536 A GB670536 A GB 670536A GB 2083649 A GB2083649 A GB 2083649A GB 2083649 A GB2083649 A GB 2083649A GB 670536 A GB670536 A GB 670536A
Authority
GB
United Kingdom
Prior art keywords
meter
phase
transductor
current
volt
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
GB2083649A
Inventor
Philip Baxter
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co Ltd
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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB2083649A priority Critical patent/GB670536A/en
Publication of GB670536A publication Critical patent/GB670536A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/36—Induction meters, e.g. Ferraris meters
    • G01R11/40—Induction meters, e.g. Ferraris meters for polyphase operation
    • G01R11/42—Circuitry therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

670,536. Volt-amp. meters. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. July 4, 1950 [Aug. 10, 1949; Aug. 26, 1949], Nos. 20836/49 and 22283/49. Class 37. In a wattmeter or watt-hour-meter, the current winding is controlled by a transductor so that the meter responds to volt-amps. or volt-amp.-hours irrespective of the power factor of the circuit. As shown for a singlephase circuit, a wattmeter M is connected in a circuit such that its voltage coil 1 is energized by the voltage across a resistor 8 across the supply leads 6, 7, and its current coil 2 is in series with the output windings 4, 5 of a transductor T whose control winding 3 is energized by the rectified current of the secondary of a current transformer 10 connected in one supply lead 6. Thus the reading of the meter M is independent of the power factor of the supply, the phase angle between the currents in the two windings 1, 2 being produced by an inductor 9 in series with the adjustable resistor 8 to give any required phase angle difference. Alternatively the transductor may be associated with the voltage coil instead of the current coil. For an unbalanced 3-phase system, three transductors may be used associated with a 3-phase meter, and for a balanced 3-phase system a 1-phase meter may be used with the windings energized from any two phases, and the transductor control effected by the sum of the separate phase currents.
GB2083649A 1949-08-10 1949-08-10 Improvements in and relating to alternating current electric measuring circuit arrangements Expired GB670536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2083649A GB670536A (en) 1949-08-10 1949-08-10 Improvements in and relating to alternating current electric measuring circuit arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2083649A GB670536A (en) 1949-08-10 1949-08-10 Improvements in and relating to alternating current electric measuring circuit arrangements

Publications (1)

Publication Number Publication Date
GB670536A true GB670536A (en) 1952-04-23

Family

ID=10152512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2083649A Expired GB670536A (en) 1949-08-10 1949-08-10 Improvements in and relating to alternating current electric measuring circuit arrangements

Country Status (1)

Country Link
GB (1) GB670536A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281642A (en) * 1962-02-20 1966-10-25 Ite Circuit Breaker Ltd A.-c. measurement of d.-c. output of rectifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281642A (en) * 1962-02-20 1966-10-25 Ite Circuit Breaker Ltd A.-c. measurement of d.-c. output of rectifiers

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