Liebert 3000 3.4Externally Mounted Battery Return Busbar, All bars and details are 0.5 in. thick

3.4Externally Mounted Battery Return Busbar

The battery return busbar is designed to mount on the overhead racking for 6000 A systems and top cabled 1500, 3000 or 4000 A power systems. It can also be mounted on a wall or on the floor below the raised floor for bottom cabled 1500, 3000 or 4000 A power systems (which are assumed to be installed on a raised, computer type floor).

3.4.1Mechanical Specifications of the External Battery Return Busbar

The external battery return busbar kit consists of a group of single busbar laminations and attachment hardware assembled as shown in Figure 17 (6000 A shown). The kit can grow verti- cally in such a way as to maintain the 3-ft maximum radius grounding requirement. Laminations are added as required to increase the capacity. The mechanical specifications of a single lamina- tion are listed in Table 22.

Table 22 Mechanical specifications of a single lamination

Figure	Length	Width	Thickness
Figure 17	863.6 mm	152.4 mm	12.7 mm
	(34 inches)	(6 inches)	(0.5 inches)

Figure 17 Top and side views of the external battery return busbar

6” (152 mm)

Top view of the external ground bar

Future growth as required

34” (864 mm)

6”	Smaller busbar for
	small wires and cables

Available

configurations:

= 1500* & 3000 A

= 4000 A

= 6000 A

Side view of the external ground bar installed on

auxiliary framing above the power system

NOTE

All bars and details are 0.5 in. thick.

*For a 1500 A system, only the bottom level is provided for the external battery return ground bar.

3.4.2Electrical Specifications of the External Battery Return Busbar

A single busbar lamination has a current carrying capacity of 3000 A.

18 Specifications