Emerson NXL UPS Systems - Manual (Page 15)

Battery Installation
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2.4.4 MBD voltage sense leads
For ease of installation, the power cables from the battery cabinets can be installed on either the top
or bottom breaker busbars (depending if top or bottom entry is used). The voltage sense leads need to
be connected to the busbars on the input of the circuit breaker (busbars that have the cables from the
battery system connected.) See Figure 22.
2.4.5 Grounding
For cabinets that have been ordered as connected or attached, the ground cables and hardware will be
supplied. See Figure 25 for location of cabinet-to-cabinet grounding.
For cabinets ordered as detached or stand-alone, customer must supply the cables and hardware. See
Table 15 for current ratings and recommended cable sizes.
2.5 Control Connection
Each Liebert NXL Battery Cabinet and Liebert NXL Module Battery Disconnect (MBD) contains a
Battery Interface Board (BIB). See 3.0 - Installation Drawings. All cabinets in a system must have
their Battery Interface boards connected in series. See Figure 14 for battery cabinet details and
Figure 16 for MBD details.
!
WARNING
Risk of electric shock. Can cause equipment damage, personal injury or death.
Hazardous battery voltage may be present on busbar. Install battery voltage sense leads
before connecting the positive and negative power cables.
NOTE
Care must be taken to route the control cables away from high voltage cables or busbars.