Datasheet

90E32AS ENHANCED POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Function Description 16 April 2, 2013
3.5.2 ENERGY REGISTERS
The 90E32AS meters non-decomposed total active, reactive and
apparent energy, as well as decomposed active fundamental and har-
monic energy. The registers are listed as below.
3.5.2.1 Total Energy Registers
Each phase and all-phase-sum has the following registers:
- Active forward/ reverse
- Reactive forward/ reverse
- Apparent energy
Altogether there are 20 energy registers. Those registers are defined
in 5.5.1 Regular Energy Registers.
3.5.2.2 Fundamental and Harmonic Energy Registers
The 90E32AS counts decomposed active fundamental and harmonic
energy. Reactive energy is not decomposed to fundamental and har-
monic.
The fundamental/harmonic energy is accumulated in the same way
as active energy accumulation method described above.
Registers:
- Fundamental / harmonic
- all-phase-sum / phase A / phase B / phase C
- Forward / reverse
Altogether there are 16 energy registers. Refer to 5.5.2 Fundamental
/ Harmonic Energy Register.
3.5.3 ENERGY PULSE OUTPUT
CF1 is fixed to be total active energy output (all-phase-sum). Both
forward and reverse energy registers can generate the CF pulse
(change of forward/ reverse direction can generate an interrupt if
enabled).
CF2 is reactive energy output (all-phase-sum) by default. It can also
be configured to be arithmetic sum apparent energy output (all-phase-
sum).
CF3 is fixed to be active fundamental energy output (all-phase-sum).
CF4 is fixed to be active harmonic energy output (all-phase-sum).
Figure-5 CFx Pulse Output Regulation
For CFx pulse width regulation, refer to Figure-5.
Case1 T>=160ms, Tp=80ms
Case 2 10ms<=T<160ms, Tp=T/2
CFx
T
p
=80ms
T
p
=0.5T
T≥160ms 10ms≤T<160ms