Powerware 9395 UPS and Plus 1 UPS 650825 kVA - Manual (Page 40)

UPS INSTALLATION PLAN AND UNPACKING
EATON Powerware ® 9395 UPS (650–825 kVA) Installation and Operation Manual S 164201725 Rev 2 www.powerware.com 3−18
There is no manual DC disconnect device within the UPS.
A battery disconnect switch is required for battery systems and may also be required
by NEC or local codes. The battery disconnect switch should be installed between the
battery and the UPS.
External DC input overcurrent protection and disconnect switch is to be provided by
the customer. Table 3-17 and Table 3-18 list the maximum ratings for continuous-duty
rated circuit breakers satisfying the criteria for both. Recommended disconnect size is
based on a maximum full load discharge time less than 3 hours. For longer discharge
times a larger disconnect may be required.
Table 3-17. Recommended DC Input Battery Disconnect Ratings – Common Battery
UPS Model
Input Rating
400V 480V
Powerware 9395−825/650 1600A 1600A
Powerware 9395−825/750 2000A 2000A
Powerware 9395−825/825 2000A 2000A
Table 3-18. Recommended DC Input Battery Disconnect Ratings – Separate Battery
UPS Model
Input Rating
(each UPM)
400V 480V
Powerware 9395−825/650
700A 700A Powerware 9395−825/750
Powerware 9395−825/825
Battery voltage is computed at 2 volts per cell as defined by Article 480 of the NEC.
Rated battery current is computed at 2 volts per cell.
The battery wiring used between the battery and the UPS should not allow a voltage
drop of more than 1% of nominal DC voltage at rated battery current.