Chapter 7 Parallel System And LBS System 61
Liebert NXC 30kVA And 40kVA UPS User Manual
7.4 LBS System
7.4.1 Cabinet Installation
An LBS system consists of two independent UPS systems, each containing one or more parallel UPS modules, as
shown in Figure 7-4 and Figure 7-5. The LBS system has high reliability and is suitable for load with multiple inputs.
For single-input load, an STS can be installed to feed power to the load.
The system uses the LBS cables to keep the output of the two independent (or parallel) UPS systems in
synchronization. One system is designated as the master, the other is designated as the slave. The operation modes
of the parallel system comprise master and/or slave operation in normal or bypass mode.
Place the UPS modules side by side and interconnect the UPS modules according to the following instructions.
Figure 7-4 LBS system (UPS module)
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