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4400 Series Installation and Operation Manual – 64527-008
9.2 One-Line Diagram
Note: Always consult your local and NEC electrical codes for wiring, cabling, and circuit protection device requirements.
Figure 9.1 shows the external wiring of the 4400 UPS with a single input.
Figure 9.2 shows the external wiring needed for the 4400 UPS with the optional dual input.
Figure 9.3 shows the external wiring for the 4400 UPS with the optional line-up and match Battery Cabinet.
Figure 9.4 shows the external wiring for the 4400 UPS with the optional internal maintenance bypass unit.
FIGURE 9.1: 4400 SINGLE INPUT ONE-LINE DIAGRAM
AC/DC
Converter
DC/AC
Inverter
Bypass Thyristor
MCCB
AC Input
3Φ 3W
or 3Φ 4W
AC Output
3Φ 3W
or 3Φ 4W
Input
Contactor
Output
Contactor
DC/DC
Converter
Ground
Wire
FuseFuse
SYNC
EMI
Filter
EMI
Filter
Optional
Xfmer
Optional
Xfmer
Fuse
DC/DC
Contactor
AC/DC
Converter
DC/AC
Inverter
Bypass Thyristor
MCCB
Input
Contactor
Output
Contactor
DC/DC
Converter
DC/DC
Contactor
Ground
Wire
FuseFuse
SYNC
Fuse
(Optional)
Secondary
AC Input
3Φ/4W
EMI
Filter
EMI
Filter
Secondary Input
Contactor
Optional
Xfmer
Optional
Xfmer
AC Input
3Φ 3W
or 3Φ 4W
AC Output
3Φ 3W
or 3Φ 4W
FIGURE 9.2: 4400 DUAL INPUT ONE-LINE DIAGRAM
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