Datasheet

90E32AS ENHANCED POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Function Description 19 April 2, 2013
3.6 MEASUREMENT FUNCTION
Measured parameters can be divided to 8 types as follows:
- Active/ Reactive/ Apparent Power
- Fundamental/ Harmonic Power
- RMS for Voltage and Current
- Power Factor
- Phase Angle
- Frequency
- Temperature
- Peak Value
Measured parameters are average values that are averaged among
16 phase-voltage cycles (about 320ms at 50Hz) except for the tempera-
ture. The measured parameter update frequency is approximately 3Hz.
Refer to Table-17.
3.6.1 ACTIVE/ REACTIVE/ APPARENT POWER
Active/ Reactive/ Apparent Power measurement registers can be
divided as below:
- active, reactive, apparent power
- all-phase-sum / phase A / phase B / phase C
Altogether there are 12 power registers. Refer to 5.6.1 Power and
Power Factor Registers.
Per-phase apparent power is defined as the product of measured
Vrms and Irms of that phase.
All-phase-sum power is measured by arithmetically summing the
per-phase measured power. The summing of phases can be configured
by the MMode0 register.
3.6.2 FUNDAMENTAL / HARMONIC ACTIVE POWER
Fundamental / harmonic active power measurement registers can be
divided as below:
- fundamental and harmonic power
- all-phase-sum / phase A / phase B / phase C
Altogether there are 8 power registers. Refer to 5.6.2 Fundamental/
Harmonic Power and Voltage/ Current RMS Registers.
3.6.3 MEAN POWER FACTOR (PF)
Power Factor is defined for those cases: all-phase-sum / phase A /
phase B / phase C.
Altogether there are 4 power factor registers. Refer to 5.6.1 Power
and Power Factor Registers.
For all-phase:
For each of the phase::
3.6.4 VOLTAGE / CURRENT RMS
Voltage/current RMS registers can be divided as follows:
Per-phase: Phase A / Phase B / Phase C
Voltage / Current
Neutral Line Current RMS:
Neutral line current can be calculated by instantaneous value
.
Altogether there are 7 RMS registers.
Refer to 5.6.2 Fundamental/ Harmonic Power and Voltage/ Current
RMS Registers.
owerapparent_p sumAll_phase_
eractive_pow sumAll_phase_
= PF_all
owerapparent_p
eractive_pow
= PF_phase
CBAN
iiii ++=