18
Installation Guide
Flatpack2 -48V 150A
~ 2029242 R2, May 2008
Breakers and Fuses
CAUTION
:
SIGNIFICANT EXTRACTION FORCE IS REQUIRED TO REMOVE DISTRIBUTION
DEVICES DUE TO THE CONTACT PRESSURE REQUIRED FOR HIGHLY RELIABLE
,
LOW
-
TEMPERATURE RISE CONNECTIONS
.
Up to six distribution busses, arranged into three sets of two, can be configured
to receive plug-in breakers or plug-in fuse holders from the front of the
Flatpack2
-48V 150A
system. Plug-in positions are likewise grouped into a maximum of
three sets of two positions, with each set stacked vertically and oriented
horizontally.
Do not use any type of clamps, pliers, or other hard tools to remove distribution
devices as the housing may be cracked by excessive force. Damaged distribution
device represent an operational hazard and should never be used.
Figure 11 - Plug-in Disconnect Device Positions (2B 4L shown)
Plug-in Breakers
Auxiliary contact circuit breakers are standard over-protection devices used
this distribution. All breakers are connected to system alarming so that an
open breaker (whether tripped or manually placed in the OFF position) triggers
a “Load Distribution Alarm” in the
Smartpack
controller. Breakers should be
removed from any unused positions to prevent nuisance alarms. Single-pole
circuit breakers rated up to 100A can be installed. Each set of positions also
accepts a two-pole breaker rated up to 175A.
Plug-in Fuse Holders
As an alternative to plug-in circuit breakers, plug-in fuse modules may be
installed. The same considerations regarding insertion and removal of
breakers should be observed.
A plug-in fuse assembly consists of three main parts: A fuse, an alarm fuse
indicator, and a plug-in module. If the main fuse element opens, the alarming
fuse also opens, giving a visible indication of a fault condition; a signal is then
sent via the
Smartpack
alarm board that activates the remote system
monitor. The alarming fuse must be replaced whenever a new main fuse is
required. A fuse holder may be removed and inserted into the plug-in module
at any time; it is not necessary to remove the plug-in module to replace the
fuse.
Two (2) Plug-
in Positions
per Set
Three (3) Sets of Plug-in
Positions (maximum)
