4 Electrical Installation
This chapter mainly introduces the electrical installation of the UPS, including the power cable and signal cable connecting
procedures and methods.
After completing the mechanical installation of the UPS, it is required to connect the power cable and signal cable of the UPS.
All the signal cables, whether shielded or not, shall be kept away from the power cables.
N O T E: D o not pow er on the U P S before the arrival of au thorized service engineer.
N O T E: T he U PS cab les should be routed by an authorized engineer in accordance with the
inform ation contained in this chapter.
4.1 Wiring of Power Cable
4.1.1 System Configuration
The cable size of the system power cable shall meet the following requirements:
UP S input cab le
The cable size of the UPS input cable differs with the UPS power ratings and input AC voltages, provided that it should also
meets the requirement of maximum input current, including the maximum battery charge current, see Table 4.1 on the next
page.
UP S bypass and outp ut cab le
The cable size of the UPS bypass and output cable differs with the UPS power rating and output AC voltages, provided that it
meets the requirement of nominal output or bypass current, as shown in Table 4.1 on the next page.
Battery cable
Each UPS connects to its battery through the two cables connecting to the positive and negative pole. The cable size of the
battery cable differs with the UPS power ratings, provided that it meets the battery discharge current requirement when the
battery discharges to near EOD voltage, as shown in Table 4.1 on the next page.
4 Electrical Installation
35
Vertiv™ Liebert® EXM2 UPS User Manual
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