Arrangement for electrical measurement
US5124624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Nov 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R22/066
- WIPO fieldMeasurement
- WIPO sectorInstruments
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.