Specifications

RT9 Powershelf Rectifier Technologies
158-1806-01.doc
15 2-Mar-06
3.4 Bulk Load connections
Figure 3.9
A bulk load can either be a single large load, or a cable connection to an additional,
external DC distribution unit. There are two M6 studs available for securing either 2 cables
with single-hole lugs or a cable with double-hole lugs. Single hole lugged cables will
require additional cable tying to prevent the cable from rotating on the studs.
The positive and negative bars are always in the same position, irrespective of whether the
system is –48VDC or +24VDC. In the case of the +24V system, the common return bar is
connected to the –VE busbar.
3.5 Load Distribution CB Trip Sense connections
To enable monitoring and alarming of tripped external load distribution circuit breakers, a
3-terminal connector is provided on the MiniCSU-3 backplane - item (8) in Figure 2.4. The
signal is ACTIVE HIGH for any circuit breaker going open circuit. Below is an example of
how to configure external auxiliary contacts to interface to the line. +15V and 0V is
available on the connector to power active circuits if required. Note: the connection can be
used in parallel with load circuits in the battery/load distribution unit.