90E32A_14 Datasheet, PDF (63/71 Pages) ATMEL Corporation – Poly-Phase High-Performance

90E32A
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
7.2 METERING/ MEASUREMENT ACCURACY
7.2.1
METERING ACCURACY
Metering accuracy or energy accuracy is calculated with relative
error:
γ
=
E_mea − E_real
E_real
×100%
Where E_mea is the energy measured by the meter, E_real is the actual
energy measured by a high accurate normative meter.
Table-14 Metering Accuracy for Different Energy within the Dynamic Range
Energy Type
Energy Pulse
ADC Range
When Gain=1
Metering Accuracy^{note 1}
Active energy
(Per phase and all-phase-sum)
CF1
PF=1.0 120μV-600mV
PF=0.5L, 180μV-600mV
0.1%
PF=0.8C, 150μV-600mV
Reactive energy
(Per phase and all-phase-sum)
CF2
sinФ=1.0 120μV-600mV
sinФ=0.5L, 180μV-600mV
0.2%
sinФ=0.8C, 150μV-600mV
Apparent energy
(Per phase and arithmetic all-phase-sum)
CF2
600μV-600mV^{note 2}
0.2%
Fundamental active energy
(Per phase and all-phase-sum)
CF3
PF=1.0 120μV-600mV
PF=0.5L, 180μV-600mV
0.2%
PF=0.8C, 150μV-600mV
Harmonic active energy
(Per phase and all-phase-sum)
CF4
PF=1.0 120μV-600mV
PF=0.5L, 180μV-600mV
0.5%
PF=0.8C, 150μV-600mV
Note 1: All the parameters in this table is tested on Atmel’s test platform.
Note 2: Apparent energy is tested using active energy with unity power factor since there’s no standard for apparent energy. Signal below 600 μV is not tested.
Electrical Specification
63
April 2, 2013