Figure 6.5 LBS System (Parallel System)
NOTE: In a dual bus system, the two UPS systems must have the same power rating, voltage and frequency, and the
load should not exceed the power rating of a UPS module system.
6.5.3 Connecting power cables
The power cable of dual bus system is identical to that of single system.
The bypass and rectifier input supplies must use the same neutral line input terminal. If the input has a current leakage
protective device, the current leakage protective device must be fitted upstream of the neutral line input terminal.
6.5.4 Connecting LBS cables
Connect the shielded and double insulated LBS optional cables (5 m, 10 m, and 15 m) between the LBS port of the two UPS
systems as shown in Figure 6.6 below and Figure 6.7 on the next page.
Figure 6.6 Connection of Typical LBS System (UPS Module)
6 Parallel System and LBS System Proprietary and Confidential ©2023 Vertiv Group Corp. 55
Vertiv™ Liebert® EXS Installer/User Guide
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