GB616706A - Improvements relating to the testing of electric meters - Google Patents

Improvements relating to the testing of electric meters

Info

Publication number
GB616706A
GB616706A GB10257/46A GB1025746A GB616706A GB 616706 A GB616706 A GB 616706A GB 10257/46 A GB10257/46 A GB 10257/46A GB 1025746 A GB1025746 A GB 1025746A GB 616706 A GB616706 A GB 616706A
Authority
GB
United Kingdom
Prior art keywords
meter
rotor
switch
meters
testing
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
GB10257/46A
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.)
UNION D'ELECTRICITE
Original Assignee
UNION D'ELECTRICITE
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 UNION D'ELECTRICITE filed Critical UNION D'ELECTRICITE
Publication of GB616706A publication Critical patent/GB616706A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

616,706. Testing and calibrating meters. UNION D'ELECTRICITE. April 3, 1946, Nos. 10257 and 10258. Convention dates, Jan. 19, 1944, and March 3, 1944. [Class 37] [Also in Group XX] A supply meter 7 is tested by stroboscopic comparison with a standard meter 1 fed with the same current. The observer views the teeth of the rotor 6 with light from a point source 3 interrupted by the graduations of rotor 2. To enable tests to be made at various loads, resistances 14 may be plugged in series with the meters, a switch 16 allowing, each resistance to be replaced by a high resistance lamp 15 at will. The standard meter 1 is preferably provided with a switch introducing errors of + 3 per cent and - 3 per cent so that if the meter under test is accurate it will appear to move in the opposite direction to its real motion in one position of the switch, and in the direction of its real motion in the other position of the switch, Fig. 2 (not shown). Where the meters are designed to rotate at different speeds for the same input, the test meter has the graduations on its rotor varied, or the speed of the rotor of the test meter is adjusted by adjusting the potential applied to the voltage coil.
GB10257/46A 1944-01-19 1946-04-03 Improvements relating to the testing of electric meters Expired GB616706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR616706X 1944-01-19

Publications (1)

Publication Number Publication Date
GB616706A true GB616706A (en) 1949-01-26

Family

ID=8981786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10257/46A Expired GB616706A (en) 1944-01-19 1946-04-03 Improvements relating to the testing of electric meters

Country Status (1)

Country Link
GB (1) GB616706A (en)

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