Besides the local regulations, to enable routine operation of switches in the BCB cabinet within the BCB cabinet, it is
recommended that clearance around the front of the UPS should be larger than 1200 mm and enough to enable free passage
of personnel with the door fully open. Meanwhile, maintain at the back of the cabinet a clearance at least 200 mm to permit
adequate circulation of air coming out of the UPS.
See Figure 7.7 below to Figure 7.11 on page139 to install and connect the BCB cabinet. There are connection terminals in the
BCB cabinet for connecting the power cables from the UPS and battery. Before powering on the UPS, lead out the internal 485
communication cables from the BCB cabinet to connect the UPS control module.
NOTE: The BCB cabinet can use bottom cable entry method. It provides one big and one small cable entry holes on
both the top plate and bottom plate. The big one is for power cable entry, and the small one is for signal cable entry.
After connection, take appropriate measures to seal the cable entry holes.
NOTE: The signal cable must be run separate from the battery power cables. 485 cable is a shield cable, both ends of
its shield layer must be connected to the enclosure. The UPS and BCB cabinet must be earthed separately.
NOTE: Make sure that the UPS rectifier has started before closing the BCB.
NOTE: Mark the battery string when configuring the divided BCB cabinet and note that the marked number must be
correspond to the battery terminals in the BCB cabinet when connecting the power cables.
Figure 7.7 Front Dimension of BCB Cabinet (unit: mm)
7 Battery Proprietary and Confidential ©2023 Vertiv Group Corp. 135
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
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