9400001-J1 Rev F
26
4.4.1 Live Bay Expansion
Additional bays can be added to the system while online without shutting down the DC plant.
4.4.2 Internal Return Bar (Optional)
The positive DC inter-bay common bar runs horizontally across the top of the distribution and power bays (within the
bays). This is the termination point for load returns, battery returns, rectifier positive, and site reference ground. There
are 24 termination points on a basic power system.
4.4.3 -48Vdc Busbar (Optional)
The -48Vdc inter-bay bar also runs horizontally across the top of the distribution and power bays (within the bays),
interconnecting the vertical -48Vdc distribution buses in each bay. There are 11 termination points on a basic power
system.
4.4.4 External Return Bar (Optional)
This option is available to facilitate termination of a high quantity of large cables. In addition, relocating the return
cables outside the bay frees up space within the bay for load cables. The external return bar is required for systems
that have more than 12 large capacity circuits in the distribution bays.
It is available with up to 3 horizontal bars and
• 202 sets of 1/2" holes on 1-3/4" centers or
• 202 sets of 3/8" holes on 1" centers
Maximum current carrying capability is 4000A per section. Multiple bars can be installed for a total of 8000A (2 bar)
and 12000A (3 bar).
Figure 21 — External Battery Return Ground Bar (2 bars shown)
To Next Page
Loading...
