Compensation circuit for the phase shift in electric meters...

Details Compensation circuit for the phase shift in electric meters... Compensation circuit for the phase shift in electric meters...

2005-01-25

2005-01-25

Berhane, Adolf (Department: 2838)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Eddy current rotor

C324S207120

Reexamination Certificate

active

06847201

ABSTRACT:
The invention relates to a compensation circuit for the phase shift between a first input (3) for a voltage determination and a second input (4) for a current determination in electric meters for direct connection, whereby a DC-tolerant converter (5), for current transformation, is arranged before said second input (4) and a high pass filter (R1, C) is arranged before the first input (3), for a first equalisation of the non-frequency-dependant phase compensation. A further equalisation of the phase compensation occurs by means of a correction device (5) in a measuring chip (2), which is connected in series with the inputs (3, 4) for voltage determination and current determination.

REFERENCES:
patent: 6016054 (2000-01-01), Slater et al.
patent: 6208135 (2001-03-01), Shattil
patent: 6211671 (2001-04-01), Shattil
patent: 6590380 (2003-07-01), Edel

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