Maxim Integrated 78M6631 - Manual (Page 26)

78M6631 Firmware Description Document UG_6631_078
26 Rev 2
6 System Connection Diagram Examples
This section shows supported 3-phase connections and configurations
3-Phase 4-Wire
The 3-phase 4-wire configuration has a connection point (neutral) for the three phases, as shown in the
following figure. The neutral is connected to the V3P3, the reference potential for voltage and current
measurement. This configuration utilizes three current transformers (CT) for the measurement of the
current on each phase; the phase voltage is sensed through resistor-dividers.
A
Neutral
B
C
VC VB VA
LOAD A
LOAD B
LOAD C
IAP IAN IBP IBN ICP ICN V
3P
3A
A
Neutral
B
C
78M6631
D
/Y