ADE7978_V01 datasheet(29/125 Pages) AD

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Data Sheet

ADE7978/ADE7933/ADE7932/ADE7923

Rev. D | Page 29 of 125

ENERGY LINEARITY REPEATABILITY

Figure 32 through Figure 35 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 33 and Figure 35, besides the fundamental component, the voltage contained a fifth

harmonic with a constant amplitude of 5% of full scale, and the current contained a fifth harmonic with a constant amplitude of 17% of full

scale. Measurements at 25°C were repeated 30 times.

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 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 33. 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 34. 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 35. 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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