Eaton Power Xpert 9395 550/275 Installation And Operation Manual page 51

UPS Installation Plan and Unpacking
Table 8. Input/Output Ratings and External Wiring Requirements for the Power Xpert 9395-550/275 – 400V, Separate
Battery (Continued)
Basic Unit Rating
Input and Output Voltage
DC Input from Each Battery Cabinet to UPS or
Battery Disconnect
(1) Positive, (1) Negative
Minimum Conductor Size
Number per Pole
DC Input from Each Battery Disconnect to Each
UPS UPM
(1) Positive, (1) Negative
Minimum Conductor Size
Number per Pole
AC Output to Critical Load (Four Wire)
Full Load Current
(3) Phases, (1) Ground
Minimum Conductor Size
Number per Pole
AC Output to Critical Load (Five Wire)
Full Load Current
(3) Phases, (1) Neutral, (1) Ground
Minimum Conductor Size
Number per Pole
NOTE: Callout letters A, B, C, and D map to
NOTE: Because of the future upgradability to a fully rated 550 kVA UPS with the addition of the FI-UPM, the UPS wiring is specified
for 550 kVA.
* Positive and negative battery cables must be run side by side in the raceway in an alternating pattern (+ - + - + - + -).
* There must be a ground cable running in the raceway with the battery cables.
NOTE If a 4-pole Automatic Transfer Switch (ATS) is used to connect the UPS to a generator or alternative input source, it may
interrupt the UPS input neutral during its transition between sources. For the 9395 UPS:
The ATS transition must be open in both directions. The "break" time for the contacts must be at least 50 ms. This allows the UPS to
operate properly, however it is important to evaluate whether the critical load will function properly as its neutral reference is rapidly
(50 ms) switched. Note also that if the UPS load is on bypass, an ATS switchover with interruption of the neutral, will interrupt the
return current path and cause a loss of all phase-to-neutral loads.
If an overlapping neutral or make-before-break ATS switch is used, the neutrals must overlap for a minimum of 50 ms during the
transition.
AC input to the UPS with separate rectifier inputs is wired as if each UPM is rated for 275 kVA (see
The bypass input, battery input, and output are wired the same as for a separate battery UPS (see
30 Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 14
Units
kVA
kW
Volts
Total Amps
C
AWG or kcmil
(each)
Total Amps
C
AWG or kcmil
(each)
Amps
D
AWG or kcmil
(each)
Amps
D
AWG or kcmil
(each)
Figure 54. Callout letters B, C, and D map to
Rating 50/60 Hz
225 225 450
205 250 410
400/400 400/400 400/400 400/400
451 551 902
500 500 500
(1) (1) (1)
451 551 902
250 250 250
(3) (3) (3)
325 397 650
350 350 350
(3) (3) (3)
325 397 650
500 500 500
(3) (3) (3)
Figure 55.
500 550
455 500
400/400
1002 1103
500 500
(1) (1)
1002 1103
250 250
(3) (3)
722 794
350 350
(3) (3)
722 794
500 500
(3) (3)
Table 9).
Table 7).