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

Page 40
Image 40
Powerware 650825 kVA operation manual UPS Model Each UPM 400V 480V, 700A