Eaton Powerware 9390-160/100 Installation And Operation Manual page 188

Installation Information
19.
There is no DC disconnect device within the UPS.
20.
A battery disconnect switch is recommended, and may be required by NEC or local codes
when batteries are remotely located. The battery disconnect switch should be installed
between the battery and the UPS.
Every battery cabinet must have a UVR-type DC circuit breaker with an auxiliary contact.
Failure to use this type of circuit breaker may cause severe damage to the UPS and create a
personnel hazard. Note that all battery cabinets provided by the UPS manufacturer have this
circuit breaker as a standard feature.
21.
External DC input overcurrent protection and disconnect switch for the remote battery
location is to be provided by the user. Table M lists the maximum rating for continuous-duty
rated circuit breakers satisfying the criteria for both.
Table M. Maximum DC Input Circuit Breaker Ratings
Powerware 9390---120/100
Powerware 9390---160/100
Powerware 9390---120/120
Powerware 9390---160/120
Powerware 9390---160/160
22.
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.
23.
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.
24.
If the conductors used for DC input from the battery cabinets to the UPS are those
provided by the UPS manufacturer, and the UPS and battery cabinets are manufactured by
the same supplier, then it is acceptable if they do not meet the noted minimum conductor
sizes.
A-20
EATON Powerware
UPS Model
208V/220V
9390 UPS (100–160 kVA) Installation and Operation Manual S 164201554 Rev E powerware.com
®
C A U T I O N
Input Voltage Rating
480V
400A 400A
450A 450A
600A 600A
DESCRIPTION:
POWER WIRING INSTALLATION NOTES
DRAWING NO:
164201554---5
REVISION:
C
SHEET:
9 of 15
DATE:
081505