Vertiv Liebert EXS Installer/User Manual page 28

2. Leave the factory-installed shorting bus bars in place in the UPS input terminal block.
3. Referring to Figure 2.4 below, make the following UPS-input hard-wire cable connections from
the upstream feeder panel to the UPS input terminal:
• Phase A to jumper between 1-2 (rA-bA)
• Phase B to jumper between 3-4 (rB-bB)
• Phase C to jumper between 5-6 (rC-bC)
• Neutral to jumper between 7-8 (N-N)
• Ground to ground bus bar (PE).
4. Referring to Figure 2.4 below, make the following UPS-output hard-wire cable connections
from the UPS output terminal to the downstream distribution panel:
• Phase A from terminal 1 to Phase A on panel-board main lug/breaker
• Phase B from terminal 2 to Phase B on panel-board main lug/breaker
• Phase C from terminal 3 to Phase C on panel-board main lug/breaker
• Neutral from jumper between terminals 4-5 to neutral bus on downstream panel.
• Ground from UPS ground bus bar (PE) to ground bus on downstream panel.
5. Torque all customer-side connections per recommendations in Table 2.1 on the previous
page, and Table 2.2 on the previous page
6. Replace the wiring access cover plate and secure it.
Figure 2.4 Single- and Dual-input Configuration Wiring Diagram
Item
1
2
3
24
Description
Ground busbar
AC-output terminals
AC-input terminals
Vertiv | Liebert® EXS™ Installer/User Guide