Datasheet

90E36A POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Function Description 14 April 2, 2013
Figure-3 Energy Register Operation Diagram
For all-phase-sum total of active, reactive and (arithmetic sum)
apparent energy, the associated power is obtained by summing the
power of the three phases. The accumulation method of all-phase-sum
energy is determined by the EnPC/EnPB/EnPA/ABSEnP/ABSEnQ bits
(b0~b4, MMode0).
Note that the direction of all-phase-sum power and single-phase
power might be different.
CF Gen
Logic
CF pulse
Bi-directional Energy
accumulator, roll over
positive/negative @
0.01CF
Forward
energy register
accumulator
reverse energy
register
accumulator
Energy accumulator
@ 1Mhz
(-)0.01
CF
(+)0.01
CF
+
ENA
ABS or Arithmetic
ENB ENC
Phase-A
Phase-B
Phase-C
Power
All-phase
sum
Positive CF
Accumulator
Negative 0-CF
Accumulator
CF[P/Q]RevFlag
Forward
energy
accumulator
Backward
energy
accumulator
Energy
accumulator @
1Mhz
(-)0.01
CF
(+)0.01
CF
Bi-directional
Energy
accumulator,
roll over
positive/nega
tive @
0.01CF
Forward
energy
accumulator
Backward
energy
accumulator
Energy
accumulator @
1Mhz
(-)0.01
CF
(+)0.01
CF
Bi-directional Energy
accumulator, roll over
positive/negative @
0.01CF
Forward energy
register
accumulator
Reverse energy
register
accumulator
Energy accumulator @
1Mhz
(-)0.01
CF
(+)0.01
CF
Rev[P/Q]chg[A/BC}
Rev[P/Q]chgT
A/B/C