90E32 Datasheet, PDF (16/71 Pages) Integrated Device Technology – Poly-Phase High-Performance Wide-Span Energy Metering IC

90E32
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
A/B/C
Phase Active
Power from DSP
A/B/C
Phase ReActive
Power from DSP
A/B/C
Phase Apparent
Power from DSP
Power Threshold
|P|+|Q|>
Total Active Power
00
1
PPhaseTh?
3 phases ₊
ABS >
PStartTh?
1
0
0
1
0
0
Power Threshold
|P|+|Q|>
Total ReActive Power
00
1
QPhaseTh?
3 phases ₊
ABS >
QStartTh?
1
00
1
0
0
Power Threshold
|P|+|Q|>
Total Apparent Power
00
1
SPhaseTh?
ABS >
3 phases ₊
SStartTh?
1
0
0
1
0
0
Figure-5 Metering Startup Handling
Total Active
Energy Metering
Phase Active
Energy Metering
Total ReActive
Energy Metering
Phase ReActive
Energy Metering
Total (arithmetic
sum) Apparent
Energy Metering
Phase Apparent
Energy Metering
Function Description
16
December 9, 2011