40 Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201764—Rev 14
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.
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.
External DC input overcurrent protection and disconnect switch for the remote battery location is to be
provided by the customer. Table 19 and Table 20 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.
Table 19. Recommended DC Input Circuit Breaker Ratings – Common Battery
UPS Model
Input Rating
400V 480V
Power Xpert 9395-1100/1000
2500A 2500A
Power Xpert 9395-1100/1100
3000A 3000A
Power Xpert 9395-1100/650
Power Xpert 9395-1100/700
Power Xpert 9395-1100/825
See Note
3000A 3000A
NOTE Because of the future upgradability to a fully rated 1100 kVA UPS with the addition of the FI-UPM, these breaker sizes are
specified for an 1100 kVA UPS.
Table 20. Recommended DC Input Circuit Breaker Ratings – Separate Battery
UPS Model
Input Rating
400V 480V
Power Xpert 9395-1100/1000
700A 700A
Power Xpert 9395-1100/1100
Power Xpert 9395-1100/650
Power Xpert 9395-1100/700
Power Xpert 9395-1100/825
See Note
NOTE Because of the future upgradability to a fully rated 1100 kVA UPS with the addition of the FI-UPM, these breaker sizes are
specified for an 1100 kVA UPS.
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Control wiring for features and options should be connected at the customer interface terminal blocks located
inside the UPS.
Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to the mains is
required.
Read and understand the following notes while planning and performing the installation:
UPS Installation Plan and Unpacking
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