ADE7978 datasheet(25/120 Pages) AD

25 / 120 page

Data Sheet

ADE7978/ADE7933/ADE7932

Rev. 0 | Page 25 of 120

Figure 30 through Figure 33 were generated using the following conditions: sinusoidal voltage with an amplitude of 50% of full scale and a

frequency of 50 Hz; sinusoidal current with variable amplitudes from 100% of full scale down to 0.033% of full scale and with a frequency

of 50 Hz; offset compensation executed. For Figure 31 and Figure 33, besides the fundamental component, the voltage contained a 5th harmonic

with a constant amplitude of 5% of full scale, and the current contained a 5th harmonic with a constant amplitude of 17% of full scale. Measure-

ments at 25°C were repeated 30 times, and the standard deviation values were extracted for current levels of 0.2% and 0.05% of full scale.

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

Figure 30. Total Active Energy Error as a Percentage of Reading, PF = 1

(Standard Deviation σ = 0.06% at 0.2% of Full-Scale Current

and σ = 0.12% at 0.05% of Full-Scale Current)

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

Figure 31. Fundamental Active Energy Error as a Percentage of Reading, PF = 1

(Standard Deviation σ = 0.06% at 0.2% of Full-Scale Current

and σ = 0.11% at 0.05% of Full-Scale Current)

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

Figure 32. Total Reactive Energy Error as a Percentage of Reading, PF = 0

(Standard Deviation σ = 0.09% at 0.2% of Full-Scale Current

and σ = 0.13% at 0.05% of Full-Scale Current)

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

Figure 33. Fundamental Reactive Energy Error as a Percentage of Reading, PF = 0

(Standard Deviation σ = 0.06% at 0.2% of Full-Scale Current

and σ = 0.13% at 0.05% of Full-Scale Current)

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ADE7978 数据表(PDF) 25 Page - Analog Devices

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