Arrangement for electrical measurement
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United States of America Patent
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-
Jun 23, 1992
Grant Date -
N/A
app pub date -
Nov 27, 1990
filing date -
Dec 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An arrangement for electrical measurement ascertains 'subordinate' quantities, and is also 'main' quantities with great accuracy and safety against falsification. An active energy to be measured is a main quantity, and a subordinate quantity is at least one of the following quantities: effective value of the voltage (u.sub.N) or of the current (i.sub.N), volt hours, volt square hours, ampere hours, ampere square hours, active power, reactive power, reactive energy, apparent output, apparent energy or power factor. The arrangement may comprise a voltage sensor (8), a voltage/current-converter (9), a multiplier (10), a current/voltage-converter (11), two analog/digital-converts (12 and 15), a signal/frequency-converter (13), a counter (14), an interface circuit (4), and an indicator (7), wherein the current/voltage-converter (11) consists of a constant current source (16) and a further multiplier (17).
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