Input circuit for an electrical energy meter
US5053697A · kind A · utility
10Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Jun 11, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an input circuit for an electrical energy meter, which circuit has a current path and a voltage path, the current path being associated with a mutual conductance transformer. In order to compensate for the differentiating function of the transformer, but without introduicng interference signals, the current path includes an active filter connected as an integrator and provided with a coupling capacitance suitable for blocking low frequency signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.