Discussion on “Some recent advances in alternating-current measuring instruments” before the Institution, 3 February, 1927

Several variants of half division two-dimensional method are proposed, which is the basis of a fundamentally new approach for constructing measuring instruments for sinusoidal or periodic electrical quantities. These measuring instruments are used in the diagnosis of electric power facilities. The most general variant, called midpoint method, is considered. The proposed midpoint method allows you to measure much smaller than using widespread methods, alternating currents or voltages, especially when changing the amplitude of the measured signal in very wide ranges, by 1–2 orders of magnitude. It is shown that using the midpoint method it is possible to suppress sinusoidal or periodic interference in the measuring path, in particular, to measure small alternating current when sinusoidal or periodic interference is 1–2 orders of magnitude higher than the useful signal. Based on the results of comparative tests, it was found that the current measuring device implementing the midpoint method is an order of magnitude more sensitive than the currently used high-precision measuring instruments.

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Recent Advances in Wireless Measuring Instruments

Scientific American ◽

10.1038/scientificamerican10231915-356 ◽

1915 ◽

Vol 113 (17) ◽

pp. 356-356

Author(s):

Herbert T. Wade

Keyword(s):

Measuring Instruments ◽

Recent Advances

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Increasing the Accuracy of Magneto-Optical Current Measuring Instruments

Measurement Techniques ◽

10.1007/s11018-014-0578-x ◽

2014 ◽

Vol 57 (9) ◽

pp. 1041-1045 ◽

Cited By ~ 1

Author(s):

A. I. Evstaf’ev ◽

M. A. Urakseev

Keyword(s):

Measuring Instruments ◽

Current Measuring

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SMART SHIELD PANEL AC VOLTMETER CELL

Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini ◽

10.15407/publishing2021.60.065 ◽

2021 ◽

Vol 2021 (60) ◽

pp. 65-74

Author(s):

B.A. Kromplyas ◽

◽

A.S. Levytskyi ◽

Ie.O. Zaitsev ◽

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...

Keyword(s):

Alternating Current ◽

Measuring Instruments ◽

Operating Parameters ◽

Signal Source ◽

Structural Scheme ◽

Calibration Process ◽

Calibration Signal ◽

Operational Characteristics ◽

Calibration Algorithm

In this paper smart shield panel electrical operating parameters meters of energy generating facilities functionality is analysis. The list of functions of measuring instruments supplemented, which allowed increasing their operational characteristics. Methods and results of realization of these functions given for the panel board intellectualized voltage meter of alternating current. The structural scheme of the developed panel board intellectualized meter is described and its main technical characteristics are given.A method of mobile calibration of the device is proposed, in which a calibration signal source with a separate fixed value is used, and the calibration process itself is controlled from the device keyboard. A modernized detailed and simplified calibration algorithm is present. Ref. 12, fig. 5, tabl. 2.

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