Instruction manual

POWER WIRING INSTALLATION NOTES
110106C
17 of 23
DESCRIPTION:
DATE:
DRAWING NO: SHEET:
REVISION:
164201603-6
INSTALLATION INFORMATION
Eaton
®
9390 UPS (20–80 kVA) and 9390IT (20-40 kVA) Installation and Operation Manual S 164201603 Rev 4 www.eaton.com/powerquality
A-29
Table R. Maximum DC Input Circuit Breaker Ratings
UPS Model
Input Voltage Rating
208V/220V 380V 400V 415V 480V
Powerware
9390/9390IT-40/20
100A 100A 100A 100A 100A
Powerware
9390/9390IT-40/30
125A 125A 125A 125A 125A
Powerware
9390/9390IT-40/40
Powerware 9390-80/40
150A 150A 150A 150A 150A
Powerware 9390-80/50 200A 200A 200A 200A 200A
Powerware 9390-80/60 250A 250A 250A 250A 250A
Powerware 9390-80/80 300A 300A 300A 300A 300A
23. 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.
24. 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.
25. 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.
26. Parallel system UPM and system bypass input feeds must come from the same source.
27. Parallel UPM input wiring size requirements and output wiring size requirements from the
UPMs to the tie cabinet or distribution panel are the same as listed in Table F through
Table K.
28. All 20 kVA and 30 kVA parallel systems must be wired as for 40 kVA.
29. If the load requires a neutral, a bypass source neutral must be provided. If the load does
not require a neutral and there is no neutral conductor connected at the bypass input, a
neutral to ground bonding jumper must be installed. Install neutral conductors from the
UPMs to the common point of connection (tie cabinet), and then install a system neutral to
ground bonding jumper. If the recommended installation method cannot be accomplished,
each UPM should have a separate neutral to ground bonding jumper installed in
accordance with Note 7. DO NOT install both a source neutral and a bonding jumper. See
Table T through Table W for system neutral bonding jumper wire sizes. Bonding jumper
must be copper wire.
C A U T I O N
HIGH IMPEDANCE GROUND SOURCES - If the source of supply is a high impedance ground (IT) type, the input neutral
conductor must be connected from the source of supply. If there is no output neutral connected to the UPS, the
neutral‐forming transformer kit (PN 103005400) may be used instead of pulling a neutral from the source. If the load requires a
neutral then an input neutral conductor must be pulled into the UPS. In no circumstances shall a neutral to ground bonding
jumper be installed in the UPS.