16
9395P 250 kVA / 275 kVA / 300 kVA
User’s and Installation Guide
3.2.2 UPS system power wiring preparation
NOTE
If installing, as part of the UPS system, a maintenance bypass without a rectifier input breaker, a
minimum of two separate feeds with upstream feeder breakers, or one feed with two upstream
feeder breakers, must be provided: one for the UPS and one for the maintenance bypass input.
DO NOT use one feed or a single feeder breaker to supply both the UPS and the maintenance
bypass.
For external wiring requirements, including the minimum size of external wiring, see Table 3-4. The
power wiring connections for this equipment are rated at 70°C. If wire is run in an ambient temperature
greater than 30°C, higher temperature wire and/or larger size wire may be necessary.
NOTE
Callout letters A, B, C, and D map to Figure
Bypass wiring data is not applicable to Input Output Module (IOM) configurations.
Table 3-4: Input/output rating for 9395P
250 kVA / 275 kVA
/ 300 kVA
Read and understand the following notes while planning and performing the installation:
•
Refer to national and local electrical codes for acceptable external wiring practices.
•
Material and labor for external wiring requirements are to be provided by designated personnel.
Units
Rating 50/60 Hz
Basic unit rating
kVA
kW
250
250
275
275
Input and output voltage
Volts
400/400
400/400
AC input to UPS rectifier
Full load current plus battery recharge current
(3) phases, (1) ground
A
Amps
447
492
AC input to UPS bypass
Full load current
(3) phases, (1) neutral–if required, (1) ground
B
Amps
At nominal voltage
361
397
DC input from battery to UPS
(1) positive, (1) negative
C
Amps
At 1.67 V/cell
657
722
AC output to critical load
full load current
(3) phases, (1) neutral–if required, (1) ground
D
Amps
361
397
300
275
400/400
492
433
722
433
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