Data Sheet
2 7
2 7
HPHASE BITS
HCONFIG[2, 1] SELECT THE
PHASE BEING MONITORED
AIRMSOS
BIRMSOS
ADE7880
CIRMSOS
FIRMS
HPHASE BITS
HCONFIG[2, 1] SELECT THE
GAIN BEING USED
2 7
APGAIN OR
BPGAIN OR
CPGAIN
2 7
2 7
2 7
HPHASE BITS
HCONFIG[2, 1] SELECT THE
PHASE BEING MONITORED
AVRMSOS
BVRMSOS
FVRMS
CVRMSOS
Figure 83. Fundamental RMS Signal Processing
FVA
The active, reactive, and apparent powers of the fundamental
component are stored into the FWATT, FVAR, and FVA 24-bit
signed registers. Figure 85 presents the associated data path.
The active, reactive and apparent powers of the 3 harmonic
components are stored into the HXWATT, HXVAR, HXVA,
HYWATT, HYVAR, HYVA, HZWATT, HZVAR, and HZVA
24-bit signed registers. Figure 86 presents the associated data path.
The power factor of the fundamental component is stored into
FPF 24-bit signed register. The power factors of the three
harmonic components are stored into the HXPF, HYPF, and
HZPF 24-bit signed registers.
The total harmonic distortion ratios computed using the rms of
the fundamental components and the rms of the phase current
and the phase voltage (see Root Mean Square Chapter for
details about these measurements) are stored into the VTHD
and ITHD 24-bit registers in 3.21 signed format. This means
the ratios are limited to +3.9999 and all greater results are
clamped to it.
Rev. A | Page 61 of 104
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