Electricity meter and an input module for an electricity meter
AssigneeLandis+Gyr, Inc.
InventorsJacob De Vries, Michel Schaller, Erich Jeker
Life of this patent
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Abstract
In order to obtain a simple construction of an electricity meter (1), the invention provides that the meter comprises a highly integrated input module (3a, 3b, 3c) in which an analog-digital converter (5a, 5b) and an output module (7a) are integrated. A multiplying means (21) can optionally be integrated. Such an input module (3a, 3b, 3c), in combination with conventional components, especially microprocessors, makes it possible to produce an electricity meter which comprises a simple construction and which is of a single-phase and multi-phase type (also for a plurality of consumers).
Claims9
A single-phase input module (3a, 3b, 3c) for an electricity meter (1) comprising:
- an analog current input and an analog voltage input (4a, 4aa and 4b respectively), wherein said inputs are connected to a signal converter means (5, 5a, 5b, 55, 41a, 41b), which includes a ΣΔ-modulator (5, 5a, 5b, 55), and
- hardware multiplying means (21, 71) for forming a power value (W),
- characterised in that
- provided as the signal converter means (5, 5a, 5b, 55, 41a, 41b) is at least one analog/digital converter which includes the ΣΔ-modulator (5, 5a, 5b, 55) and at least one decimation filter (41a, 41b),
- the input module (3a, 3b, 3c) is in the form of an integrated circuit, and
- the hardware multiplying means (21, 71) is integrated into the integrated circuit and is connected on the output side of the analog/digital converter (5, 5a, 5b, 55, 41a, 41b).
Dependencies are inferred from the claim text.