UPS Interconnection Kits
86
Appendix A.1.2 DC Power Connections
The DC power connections to the Liebert FS are made through the circuit breaker (see
Figure 96
) in
the UPS interconnection kit installed in your Liebert FS. The maximum wire size for the circuit
breaker terminals is 350MCM - 600VDC (approximate metric equivalent: 150mm
2
wire section). Wire
size and installation must comply with all applicable local, regional and national regulations (e.g.,
National Electric Code for USA).
Figure 96 Circuit breaker
The Liebert FS cabinet is configured for top entry cables in standard configuration. The cables can
also be run through the side panels. The Liebert FS cabinet does not accommodate bottom entry
cables.
The connection of the circuit breaker is described in
Figure 135 - Elevation drawing—Liebert FS
cabinet with integrated circuit breaker
. Refer to this drawing to ensure that the adequate con-
nections are performed.
Circuit Breaker Torque
Tighten the positive and negative terminals of the DC power connections on the circuit breaker to
250 in-lb. (29 N-m) unless the equipment is labeled with a different torque value.
Liebert FS
Negative
Terminal
Liebert FS
Positive
Terminal
Summary of Contents for Liebert FS Series
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Page 127: ...Installation Drawings 115 Figure 121 Electrical connections ...
Page 128: ...Installation Drawings 116 Figure 122 Electrical system block diagram ...
Page 130: ...Installation Drawings 118 Figure 125 Outline drawing Liebert FS cabinet 12 100120 00 Rev 01 ...
Page 156: ...Installation Drawings 144 Figure 152 Power line diagram ...
Page 166: ...Auxiliary Backup AC Power Supply 154 ...
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