Electronic type polyphase electric energy meter
US4217545A · kind A · utility
12Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1975 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Jun 20, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/127
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a polyphase electric energy meter, voltages of the phases of a polyphase alternating power to be measured are utilized to subject an input pulse signal to be applied to a pulse distributor to pulse width modulation to form polyphase control pulses, which cyclically operate switches provided respectively for the phases so that an operation circuit cyclically receives the voltages and currents of the phases and produces a current output proportional to the sum of the electric powers of the phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.