Vertiv Liebert EXM2 - Connections between Battery Compartments and UPS; BCB Box (Optional)

7.10 Connections between battery compartments and UPS
The cables for connecting the UPS to the battery cabinets are not supplied. They can be provided by the manufacturer upon
special request.
A battery area temperature sensor is optional and includes a connecting cable. Place the sensor in the battery cabinet to
monitor the battery temperature.
• The battery cabinet should be installed adjacent to the UPS.
• Make the ground connections (PE).
• Connect the batteries with cables, to terminals + (positive pole) and - (negative pole), and in accordance with the
connection diagram.
W A RN IN G! Before the system starts, ensure that U PS battery connection polarity is correct.
W rong connections can dam age the system and endanger operator safety.
W A RN IN G! Batteries are a potential source of danger due to their electrical charge and
chemical com p osition. Therefore, observe the handling in structions provided by the battery
m anufacturer. T h ese usually can b e found in the material w hich is included in the shipm ent.
N O T E: W hen rech arging, follow th e instructions printed on the packaging
N O T E: B efore replacing batteries, m ake sure the new b atteries are fully charg ed.
W A RN IN G! If a battery has b een disconnected and must be reconnected, the battery isolator
m ay b e reconnected only after you have m ade certain that voltage w ith th e correct polarity is
present in the Battery term inals.
7.11 BCB Box (Optional)
The UPS requires an optional BCB box, which contains one BCB and one BCB control board, to provide over-discharge and
overcurrent protections for the battery. The BCB box can also electrically isolate the UPS from the battery to minimize the
danger of the service personnel at work.
The BCB provides the following functions:
• Short circuit protection and EOD protection. The BCB opens automatically when the battery voltage drops to the
EOD voltage point.
• Supports the UPS EPO function. The BCB opens automatically when the EPO switch on the operator control and
display panel of the UPS is pressed.
• When the UPS has internal fault, the BCB can be automatically tripped to protect against fault expansion, and
then effectively protect the user's property safety
Table 7.3 on the facing page provides the mechanical specifications of the BCB box.
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Vertiv™ Liebert® EXM2 UPS User Manual