71M6515H-IGT/F Maxim Integrated Products, 71M6515H-IGT/F Datasheet - Page 52

• Manufacturer Part Number: 71M6515H-IGT/F
• Description: IC ENERGY METER AFE 3PH 64-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 71M6515H-IGT/F

• Mounting Style: SMD/SMT
• Package / Case: LQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Meter Circuits
Bits 7 through 5 (EQU) of the CONFIG register allow the selection of the metering equation that is to be implemented by the
71M6515H. The equation to be used depends on the meter configuration.
Figure 15 shows how the 71M6515H is connected for the most common configuration, the three-phase, four-wire WYE. The
neutral wire connects to V3P3A. For this configuration, equation 5 must be selected.
In many three-phase three-wire configurations, one phase can be grounded, as shown in Figure 16. Again, the grounded wire
is connected to V3P3A. For this configuration, equation 2 must be selected.
The four-wire three-phase delta configuration is shown in Figure 19. In this case, the center tap of the transformer that
provides the A-C voltage is grounded. the grounded wire is connected to V3P3A. For this configuration, equation 2 must be
selected. For this configuration, equation 3 must be selected, i.e. P = VA*(IA-IB)/2 + VC*IC.
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A Maxim Integrated Products Brand
transformers
Distribution
Figure 15: 4-Wire 3-Phase WYE Connection
© 2005−2011 Teridian Semiconductor Corporation
B
N
A
C
APPLICATION INFORMATION
P=VA*IA+VB*IB+VC*IC
ANSI: Form 16S
CT
EQU = 5
CT
CT
V3P3A
IA
V A
IB
IC
VB
VC
71M6515H
Energy Meter IC
LOAD B
LOAD C
LOAD A
DATA SHEET
71M6515H
JULY 2011
1.6