Eaton FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide 164201403 Rev Bwww.eaton.com/powerquality45Chapter 6 Internal Bypass Switch InstallationW A R N I N GOnly qualified service personnel (such as a licensed electrician) should perform thehardwired installation. Risk of electrical shock.C A U T I O NBefore you install the bypass switch, verify that the bypass switch and the AC disconnectswitch are in the OFF position.1. Identify the installation wiring diagram that applies to yourFERRUPS (see Table 21).Table 21. Internal Bypass Switch Wiring DiagramsModel (Frequency) UPS Input Voltage UPS Output Voltage Bypass Switch Type Wiring DiagramFE 4.3–18 kVA (60 Hz) 120(4.3–7 kVA only)120 MBB or BBM Figure 17 on page 49208 or 240 120/208 or 120/240 MBB or BBMFor 208V, use BBM onlyFigure 18 on page 50208 or 480 source*/240 input120/240 MBB or BBM Figure 19 on page 51220** 220 BBM Figure 20 on page 52QFE 4.3–18 kVA (50 Hz) 220, 230, or 240 220, 230, or 240 MBB or BBM Figure 20 on page 52*With a step-up or step-down transformer.**Contact your service representative for (a) single-phase installations that do not have the same input and outputvoltage, or (b) split-phase installations that require 220 Vac.