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INSTALLATION INFORMATION
Table G. Input/Output Ratings & External Wiring Requirements for the Powerware 9390/9390IT-40/30
Basic Unit Rating at 0.9 lagging pF load
Input and Bypass Input
Output
AC Input to UPS Rectifier
(0.98 min. pF)
Full Load Current plus Battery
Recharge Current
(3) Phases, (1) Ground
Minimum Conductor Size
Number per Phase
AC Input to UPS Bypass
Full Load Current
(3) Phases, (1) Neutral-if required,
(1) Ground
Minimum Conductor Size
Number per Phase
DC Input from Battery to UPS
(1) Positive, (1) Negative
Minimum Conductor Size
Number per Pole
AC Output to Critical Load
Full Load Current
(3) Phases, (1) Neutral-if required,
(1) Ground
Minimum Conductor Size
Number per Phase
Neutral Bonding Jumper
Minimum Conductor Size
Number (See Note 7)
NOTE
6.
The bypass feed into this equipment uses three or four wires. The rectifier feed into this
equipment uses three wires. The phases must be symmetrical about ground (from a Wye
source) for proper equipment operation.
7.
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. DO NOT install both a source neutral
and a bonding jumper. See Table F through Table K for neutral bonding jumper wire sizes.
Bonding jumper must be copper wire. See Following Cautions.
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.
A-14
Eaton
®
9390 UPS (20–80 kVA) and 9390IT (20-40 kVA) Installation and Operation Manual
Units
VOLTS
VOLTS
Amps
A
AWG or kcmil
(each)
Amps
B
AWG or kcmil
(each)
Amps@
C
(2.0V/cell)
AWG or kcmil
(each)
Amps
D
AWG or kcmil
(each)
AWG or kcmil
-
(each)
Callout letters A , B , C , and D map to Drawing 164201603-5, sheets 1 of 6,
4 of 6, 5 of 6, and 6 of 6.
kVA
30
kW
27
208/220
208/220
90
2/0
(1)
84/79
2/0
(1)
Vdc
384-480
432-480
77
1
(1)
84/79
2/0
(1)
4
(1)
C A U T I O N
DESCRIPTION:
POWER WIRING INSTALLATION NOTES
DRAWING NO:
164201603-6
REVISION:
D
S
164201603 Rev 4 www.eaton.com/powerquality
Rating 50/60 Hz
30
30
30
27
27
27
380
400
415
380
400
415
52
50
48
4
4
4
(1)
(1)
(1)
46
44
42
4
4
4
(1)
(1)
(1)
432-480
432-480
77
77
77
1
1
1
(1)
(1)
(1)
46
44
42
4
4
4
(1)
(1)
(1)
6
6
6
(1)
(1)
(1)
SHEET:
DATE:
071608
30
27
480
480
40
4
(1)
36
4
(1)
432-480
77
1
(1)
36
4
(1)
6
(1)
2 of 23
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