Alpha Technologies CXPS-E3 19, Техническое руководство

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9400016-J0 Rev D 34
7.5 Distribution Cabling
7.5.1 Load Planning/Breaker (fuse) Spacing
Because breakers/fuses generate most of the heat in a system, care must be taken in the layout of high current
breakers/fuses. Specific guidelines are as follows:
1. Any single pole Over Current Protection Device (OCPD) rated at 125A can be mounted in pairs, but cannot have
an OCPD installed on either side of the pair.
2. Any single pole Over Current Protection Device (OCPD) rated at 100A and below can be mounted in any position
without spacing.
3. The highest rated bullet fuse that can be used is 125A. The highest rated single pole breakers that can be used
for a load is 100A. The highest rated single pole breaker that can be used for batteries is 125A at temperatures
below 55°C and 100A for temperatures above 55°C
While these guidelines require some planning, they do not limit achieving the maximum 400A capacity for any
breaker size combination (except if many small breakers are used).
7.5.2 Load Connections
For wire sizing refer to guidelines supplied with the load equipment.
Terminate distribution cabling with 1/4"–5/8" center lugs for connecting to the E3 distribution. Always make the return
connection to the E3, and then verify the nut tightening torque before installing the hot connection as once the hot
connection is in place it is difficult to access the return connection.
Always use the supplied hardware (nuts) for attaching the lugs. The supplied nuts have a serrated flange which
eliminates the need for a second lock washer both allowing more threads to show after a completed connection and
avoiding thin hardware which can fall through small gaps in the equipment covers.
Load / Battery Breaker Return Connections
1. Secure cables with two hole lugs to the 1/4" studs on 5/8" centers using the supplied hardware.
2. Run cables directly out the rear of the distribution center.
Load / Battery Breaker Hot Connections
Connect breaker hot connections.
1. Secure cables with two hole lugs to the 1/4" studs on 5/8" centers using the supplied hardware.
2. Run cables directly out the rear of the distribution center above the breaker return cables.
CAUTION! and HOT!
For applications when the E3 is subjected to ambient temperatures above 55
°
C it shall
be installed inside equipment such that unintentional contact with area of the side pan-
els between the mid-mount bracket and the back of the unit is unlikely. For clarity this is
the area marked with a "Caution - Hot" label
Connect breaker returns before hot connections
.
NOTE: