User guide

78M6631 Firmware Description Document UG_6631_078
28 Rev 2
Non-Isolated Basic Delta Connection (alternative configuration)
The system is referenced to a phase (in this case phase B). The currents are sensed inside the load to
determine the individual load current value.
A
B
C
VC
VB VA
IAP
IAN
IBP
IBN ICP
ICN
V3P3A
78M6631
LOAD A-C
A
B
C
LOAD A-B
LOAD B-C
LOAD B-C
D/Y
Isolated Basic Delta Connection
In this case, the 78M6631 is completely isolated. This configuration requires 3 voltage transformers and 3
current transformers. This configuration allows the measurement of the current of the individual loads A-
B, B-C, A-C.
A
B
C
VC
VB VA
IAP
IAN
IBP
IBN ICP
ICN
V3P3A
A
B
C
78M6631
LOAD A-C
LOAD A-B
LOAD B-C
D/Y