Eaton Power Xpert 9395 550/275, Installation And Operation Manual

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UPS Installation Plan and Unpacking
Power Xpert
TM
9395 550/275 UPS (225–550 kVA) Installation and Operation Manual 164201716—Rev 8 www.eaton.com/powerquality 3-17
CAUTION
To reduce the risk of fire, connect only to a circuit provided with maximum input circuit breaker current
ratings from Table 3-15 in accordance with NEC ANSI/NFPA 70.
The line-to-line unbalanced output capability of the UPS is limited only by the full load per phase current values
for AC output to critical load shown in Table 3-4 or Table 3-7. The recommended line-to-line load unbalance is
50% or less.
Bypass and output overcurrent protection and bypass and output disconnect switches are to be provided by
the customer. Module Output Breakers (MOBs) are to be provided by the customer. Table 3-17 lists the
recommended rating for bypass, output, and MOB circuit breakers.
There is no manual DC disconnect device within the UPS.
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.
External DC input overcurrent protection and disconnect switch for the remote battery location is to be
provided by the customer. Table 3-18 or Table 3-19 lists the maximum rating for continuous-duty rated circuit
breakers satisfying the criteria for both. Recommended breaker size is based on a maximum full load
discharge time less than 3 hours. For longer discharge times a larger breaker may be required.
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.
Table 3-17. Recommended Bypass, Output, and MOB Circuit Breaker Ratings
UPS Model
Bypass, Output, and MOB Rating
Load Rating 400V 480V
Power Xpert 9395-275/225
80% Rated 1000A 1000A
100% Rated 800A 700A
NOTE Because of the future upgradability to a fully rated 550 kVA UPS with the addition of the FI-UPM, these
breaker sizes are specified for 550 kVA.
Table 3-18. Recommended DC Input Circuit Breaker Ratings
UPS Model
Input Rating
400V 480V
Power Xpert 9395-550/275 1600A 1600A
NOTE Because of the future upgradability to a fully rated 550 kVA UPS with the addition of the FI-UPM, these breaker sizes
are specified for 550 kVA.
Table 3-19. Recommended DC Input Circuit Breaker Ratings – Separate Battery
UPS Model
Input Rating
400V 480V
Power Xpert 9395-550/275 700A 700A
NOTE Because of the future upgradability to a fully rated 550 kVA UPS with the addition of the FI-UPM, these breaker sizes
are specified for 550 kVA.