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Installation 4. Wiring Diagram
Rating voltage for every phase wire system
Phase wire type
Type
Rating voltage
Figure
3-phase 4-wire type
STAR
max AC277V(L-N)/480V(L-L)
Figure 1
3-phase 3-wire type
DELTA
max AC220V(L-L)
Figure 2
STAR
max AC440V(L-L)
Figure 3
1-phase 3-wire type
―
max AC220V(L-N)/440V(L-L)
Figure 4
1-phase 2-wire type
(Note)
DELTA
max AC220V(L-L)
Figure 5
STAR
max AC440V(L-L)
Figure 6
Note. In case of a circuit which is wired from the delta connection of a 3-phase 3-wire type or a circuit of a
transformer of a 1-phase 2-wire type, the maximum rating is “AC220V”.
In case of a circuit which is wired from a 3-phase 4-wire type, the star connection of a 3-phase 3-wire type
or a 1-phase 3-wire type, the maximum rating is “AC440V”.
