Eaton Power Xpert 9395 550/275 Installation And Operation Manual page 46

Table 5. Input/Output Ratings and External Wiring Requirements for the Power Xpert 9395-550/275 – 480V, Common
Battery (Continued)
Basic Unit Rating
Input and Output Voltage
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.
Battery Conductor Sizing: Eaton strongly recommends using the specified DC conductor size and quantity shown above for
optimum system performance and battery run time.
Battery Cable Routing Requirements
Conduit applications:
* Each conduit must have a Positive, Negative, and Ground conductor.
* There must be an equal number of positive and negative conductors in a single conduit. Only one ground conductor is required in
each conduit.
Raceway applications:
* 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.
Units
kVA
kW
Volts
Amps
D
AWG or kcmil
(each)
Figure 52 or Figure 53.
Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 14
UPS Installation Plan and Unpacking
Rating 50/60 Hz
225 225 450
205 250 410
480/480 480/480 480/480 480/400
271 331 541
300 300 300
(4) (4) (4)
500 550
455 501
480/480
601 662
300 300
(4) (4)
25