Eaton 9155 User Manual

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Contents

WALL-MOUNTED BYPASS SWITCH INSTALLATIONEaton 9155 UPS (8–15 kVA) User's Guide 164201553 Rev G (www.eaton.com/powerquality) 37Wiring the Wall-Mounted Bypass SwitchThe Eaton 9155 UPS has the following power connections: 2‐phase (L1 and L2), neutral, and ground connection for rectifier/bypass input 2‐phase (L1 and L2), neutral, and ground connection for load outputThe nominal input/output voltages are: 100/200, 110/220, or 120/240 Vac with 180° phase displacement 120/208 or 127/220 Vac with 120° phase displacementOutput overcurrent protection and disconnect switch must be provided by others.Figure 29 on page 41 shows a oneline diagram of the UPS with a wall-mountedbypass switch.W A R N I N GOnly qualified service personnel (such as a licensed electrician) should perform the hardwired installation.Risk of electrical shock.To hardwire the wall-mounted bypass switch:1. Verify that the electrical connections to the installation site have been properlyinstalled.2. A wall-mounted, user‐supplied, readily‐accessible disconnection device must beincorporated in the input wiring.Compare the circuit breaker ratings and wire sizes to the specifications in Table 5on page 39.NOTE To accommodate the feature of easy system expandability, it is recommended that initial installationof the Eaton 9155 UPS contain wiring to support the maximum capacity of the UPS cabinet.3. Switch off utility power to the distribution point where the bypass switch cabinetand UPS will be connected. Be absolutely sure there is no power.4. Determine your equipment's grounding requirements according to your localelectrical code.5. Verify that the UPS battery circuit breaker is in the OFF position (see Figure 25).6. Remove the UPS wiring access cover and retain (see Figure 25).