Eaton 9355 - 4.3.2 UPS and UPS with Input Isolation Transformer Power Wiring Installation

38 Eaton 9355 UPS (10/15 kVA) User’s Guide 164201594—Rev H0
UPS Configuration
Paragraph Section
UPS only
4.3.2 UPS and UPS with Input Isolation Transformer Power Wiring
Installation
UPS with an input isolation transformer
4.3.2 UPS and UPS with Input Isolation Transformer Power Wiring
Installation
UPS with a version 1 wall-mounted bypass switch
4.3.3 UPS with a Version 1 Wall-Mounted Bypass Switch
UPS with a version 2 wall-mounted bypass switch
4.3.4 UPS with a Version 2 Wall-Mounted Bypass Switch
Parallel UPS configuration
Refer to the Eaton 9355 Parallel UPS (10/15 kVA) User's Guide.
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The Eaton 9355 UPS has the following power connections:
• 3–phase (L1, L2, and L3), neutral, and ground connection for rectifier/bypass input
• 3–phase (L1, L2, and L3), neutral, and ground connection for load output
The nominal input/output voltages are:
• 120/208 or 127/220 Vac
• 480V or 600V 60-Hz input is available using the optional input isolation transformer module
Output overcurrent protection and disconnect switch must be provided by others.
Figure 52 through Figure 54 show the oneline diagrams.
WARNING
Only qualified service personnel (such as a licensed electrician) should perform the UPS installation. Initial
startup must be performed by an authorized Eaton Customer Service Engineer. Risk of electrical shock.
To hardwire the UPS:
1. Verify that the electrical connections to the installation site have been properly installed.
2. A wall-mounted, user–supplied, readily–accessible disconnection device must be incorporated in the input
wiring.
Compare the circuit breaker ratings to the ones in Table 4.
NOTE To accommodate the feature of easy system expandability, it is recommended that
initial installation of the Eaton 9355 UPS contain wiring to support the maximum
capacity of the UPS cabinet.
3. Switch off utility power to the distribution point where the UPS will be connected. Be absolutely sure there
is no power.
4. Determine your equipment's grounding requirements according to your local electrical code.
5. Verify that the UPS battery circuit breaker is in the OFF position (see Figure 21).
UPS System Installation