UPS SYSTEM INSTALLATIONEaton 9395 550/275 UPS (225–550 kVA) Installation and Operation Manual 164201716 Rev 2 www.eaton.com/powerquality 4-74.6.2 External Power Wiring InstallationTo install wiring to connections:1. Remove one top screw and two bottom screws securing the UPS left front panel(see Figure 4‐2 on page 4-4). Lift the panel straight up to remove it from thepanel hanger bracket at the top of the cabinet.2. Remove the screws securing the internal safety shield panel and remove thepanel to gain access to the input, output, and battery terminals. Retain thehardware for later use.3. Route the input and output cables through either the top or bottom of the cabinetto the UPS terminals. See Figure 4‐4 for wiring access information and Figure 4‐6and Figure 4‐7 for common rectifier feed terminal locations or Figure 4‐8 throughFigure 4‐10 for separate rectifier feed terminal locations.Top Access Wiring. Remove the top conduit plate from the top of the UPS.Identify all conduit requirements and mark their location. Drill and punch allconduit holes in the top conduit plate prior to mounting on the UPS. Install theconduit plate and install all conduit runs into the plate. Pull the wiring through theconduit into the wiring area.Bottom Access Wiring. Remove the bottom conduit plate from the inside bottomof the UPS. Identify all conduit requirements and mark their location. Drill andpunch all conduit holes in the bottom conduit plate prior to mounting on the UPS.Install the conduit plate and install all conduit runs into the plate. Pull the wiringthrough conduit into the wiring area.4. Locate the external wiring terminal hardware kit packed on the bottom left sideof the ISBM section.5. If installing a UPS with separate rectifier feeds, proceed to Step 6; otherwise,proceed to Step 8.NOTE On a UPS that is configured for separate rectifier inputs, all sources that feed the separate rectifierinputs must be derived from a common ground point.6. Connect phase A, B, and C rectifier input power wiring from the utility source toeach UPM rectifier input terminal block in the UPS cabinet. See paragraph 3.2.2on page 3-7, Table 3‐8 on page 3-13, and Table 3‐12 on page 3-15 for wiring andtermination requirements.7. Proceed to Step 10.8. Using hardware from the external wiring terminal hardware kit (see Table 3‐10 onpage 3-15), connect phase A, B, and C rectifier input power wiring from the utilitysource to the rectifier input terminals in the UPS cabinet. See paragraph 3.2.2 onpage 3-7 for wiring and termination requirements.9. Using hardware from the external wiring terminal hardware kit (see Table 3‐10 onpage 3-15), connect phase A, B, and C, and Neutral (if required) bypass inputpower wiring from the utility source to the bypass input terminals and neutralterminals in the UPS cabinet. See paragraph 3.2.2 on page 3-7 for wiring andtermination requirements.
