Powerware 650825 kVA operation manual UPS Model Each UPM 400V 480V, 700A

UPS INSTALLATION PLAN AND UNPACKING

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 3-17and Table 3-18list 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

		Input Rating
UPS Model
	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

		Input Rating
UPS Model		(each UPM)
	400V	480V
Powerware 9395−825/650
Powerware 9395−825/750	700A	700A
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.

3−18 EATON Powerware® 9395 UPS (650–825 kVA) Installation and Operation Manual S 164201725 Rev 2 www.powerware.com