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CURRENT TECHNOLOGY
ISM
®
TM
Service Configurations
Figure 1
3-Phase, 4-Wire WYE
Figure 2
3-Phase, 3-Wire DELTA
INTEGRATED SUPPRESSION MODULE
Figures 1-4 show the electrical relationship between the ISM and these four
basic service configurations: WYE, DELTA, High-Leg DELTA and SPLIT-PHASE .
C
Xo BOND
C
C
B
A
B
N
A
N
N
G
G
EARTH
GROUND
C
B
A
B
A
G
G
EARTH
GROUND
A
N B
G C
LOAD
ISM Unit
TM
A
B
G C
LOAD
ISM Unit
TM
7
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