Ups System Power Wiring Preparation - Eaton Power Xpert 9395 Installation And Operation Manual

3.2.5

UPS System Power Wiring Preparation

Read and understand the following notes while planning and performing the installation:
Refer to national and local electrical codes for acceptable external wiring practices.
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To allow for future kVA upgrades, consider installing a derated UPS using wiring and external overcurrent
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protection breakers sized for a fully rated UPS.
For external wiring, use 75°C copper or aluminum wire. Wire sizes listed in Table 3-10 through Table 3-22
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are for copper wiring only. If wire is run in an ambient temperature greater than 30°C, higher temperature
wire and/or larger size wire may be necessary. Wire sizes are based on using the specified breakers.
Wire ampacities are chosen from Table 310.15(b) (16) of the National Electrical Code (NEC). Specification is
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for copper wire with a 75°C rating.
Material and labor for external wiring requirements are to be provided by designated personnel.
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If installing a maintenance bypass, a minimum of two separate feeds with upstream feeder breakers, or a
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single feed with two upstream feeder breakers, must be provided: one for the UPS or rectifier input breaker
(RIB) (if installed) and one for the maintenance bypass input. DO NOT use a single feed or a single feeder
breaker to supply both the UPS or RIB and the maintenance bypass. If a bypass input breaker (BIB) is
installed in the maintenance bypass and a single-feed UPS is being installed, a single feed to the
maintenance bypass is acceptable for supplying both the UPS and the bypass.
The bypass and rectifier feeds into this equipment use three wires. The phases must be symmetrical about
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ground (from a Wye source) for proper equipment operation.
The Eaton 9395P-300 480V and 600V unit is designed for operation on a grounded-wye source of supply.
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There is no additional connection point for a neutral conductor. The output of this UPS will not directly
support phase to neutral loads.
The ISBM and UPM sections are shipped with debris shields covering the ventilation grills on top of the
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sections. Do not remove the debris shields until installation is complete. However, remove the shields
before operating the UPS. Once the debris shields are removed, do not place objects on the ventilation
grills.
In a common battery system, all UPMs are powered from one common battery source. In a separate battery
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system, each UPM is powered from separate battery sources.
UPSs in distributed bypass and parallel systems must use a separate battery system for each UPS.
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On a UPS configured as an Input Output Module (IOM), requirements for bypass input wiring, termination,
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conduit, and bypass breaker are not applicable.
If the power rating listed on the nameplate of the installed UPS is not found in the following tables, wire the
UPS using the fully rated specifications. Otherwise, calculate the required wire, conduit, and breaker sizes
using the following guidelines in addition to those already listed in paragraph 3.2.5:
Select wire size according to the UPS nameplate.
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Do not use wire larger than the largest size listed in Table 3-6 through Table 3-17.
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Use terminal recommendations from Table 3-18 through Table 3-21.
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Size and number of conduits must not exceed those listed in Table 3-22 and Table 3-24.
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Select overcurrent protection input, battery, and output breakers according to the UPS nameplate rated for
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either 80% or 100%.
Follow all applicable NEC and local codes.
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Wire sizes listed are for copper wiring only
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Eaton Power Xpert 9395P-300 (300kVA, 300kW) UPS Installation and Operation Manual
UPS Installation Plan and Unpacking
P-164000563—Rev 04 www.eaton.com/powerquality 3-13