Eaton Power Xpert 9395 Installation And Operation Manual page 46

• Eaton UPS systems are designed to operate with two optional ground schemes. Both configurations
comply with international safety regulations (as seen on the UPS name plate).
1. Internal reference generated through an earth reference. Ground current will be equal to or less than
5% of the unit rating. This takes the form of a UPS N bus to ground bond wire.
2. Internally generated reference which avoids ground current. By locating the center reference inside
the three phase conductors, the relationship between the UPS source and the UPS output is
maintained. This is an internal UPS function and requires no additional work on the part of the installer
or user.
SINGLE HIGH IMPEDANCE GROUND SOURCE - In North American installations, the neutral conductor from
the high impedance ground source of supply CANNOT be used. DO NOT bond the inverter center point (E12)
to ground: this is an internal UPS function and requires no additional work by the installer or user.
DUAL HIGH IMPEDANCE GROUND SOURCE - In North American installations, the neutral conductor from the
high impedance ground source of supply CANNOT be used. DO NOT bond the inverter center point (E12) to
ground: this is an internal UPS function and requires no additional work by the installer or user. Please contact
the Eaton help desk listed in Chapter 1 for additional guidance regarding dual high impedance ground sources.
When selecting the most appropriate grounding scheme for your application, consider items such as:
– Ground fault detector settings
– Site specific specifications and requirements
– Local codes and regulations
• The ISBM and UPM sections are shipped with debris shields covering the ventilation grills on top of the
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, single and multiple UPMs are powered from one common battery source. In
a separate battery system, multiple UPMs are each powered from separate battery sources.
• UPMs in distributed bypass and parallel systems must use a separate battery system.
• On a UPS configured for separate rectifier inputs, all sources that feed the separate rectifier inputs must
be derived from a common ground point.
• A Field Installed UPM (FI-UPM) is always designated as UPM 4.
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
3.2.4 UPS System Power Wiring
• Select wire size according to the UPS nameplate.
• Do not use wire larger than the largest size listed in
• Use terminal recommendations from
• Size and number of conduits must not exceed those listed in
Preparation:
Table 5
Table 13 through
Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201764—Rev 14
UPS Installation Plan and Unpacking
through Table 8.
Table 15.
Table 16.
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