Eaton 9355 Installation And Operation Manual

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Eaton 9355 UPS (20/30kVA) Installation and Operation Manual 164201626—Rev F www.eaton.com/powerquality 21Chapter 5 Electrical InstallationThe Eaton 9355 has the following power connections:l 3-phase (L1, L2, and L3), neutral, and ground connection for rectifier/bypass inputl 3-phase (L1, L2, and L3), neutral, and ground connection for load outputThe nominal input/output voltages are:l 120/208 or 127/220 Vac (UPS only or parallel system)l 208V, 480V, or 600V 60-Hz input is available when using the Options Cabinet with an input isolationtransformerl 480/480 Vac is available when using the Options Cabinet with an output transformerOutput overcurrent protection and disconnect switch must be provided by others.Figure 24 through Figure 31 beginning on page 37 show the oneline diagrams.WARNINGOnly 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 electricalshock.Wiring PreparationTo begin wiring the UPS or Options Cabinet: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 inputwiring.Compare the circuit breaker ratings to the ones in Table 1 on page 35.Note: To accommodate the feature of easy system expandability, it is recommended that initial installationof 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 or Options Cabinet will be connected. Beabsolutely sure there is no power.4. Determine your equipment's grounding requirements according to your local electrical code.5. Remove the UPS front door (see page 10).6. Verify that the UPS input circuit breaker is in the OFF position (see Figure 12).7. Verify that the UPS battery circuit breaker is in the OFF position.8. If you ordered the UPS with the optional output circuit breaker, verify that the output circuit breaker is inthe OFF position.9. Remove the UPS wiring access cover and retain.10. Remove the UPS connections insulator and retain