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MX28B-1200 PRODUCT MANUAL Revision B
18 MX28B-1200/2400
5.5 Rectifier Installation
The APC Model MRF28H54BV rectifiers are shipped in separate containers. Follow the
procedure below to install a rectifier.
1) Remove the rectifier from its shipping container.
2) Remove the rectifier retaining screw from the shelf position where the rectifier is to be
installed.
3) Slide the rectifier into the shelf between the guides until it is fully seated.
4) Fasten the rectifier in place with the rectifier retaining screw.
Since all adjustments are made from the system control unit, no rectifier adjustments are
necessary.
NOTE: All “FLOAT” – “BOOST/EQUALISE” switches (one is located on the front of
each rectifier in the system) must be set to “FLOAT” to allow the MX28B to
control the output voltage properly.
5.6 Multiple Frame Assembly
5.6.1 Power Bus Connections
Installations with multiple box frames requires splicing of the power buses. The MX28B-1200 /
2400 family of power systems and distribution bays are designed so that the power buses can be
connected from bay to bay through the use of simple splice plates. Figure 5-5 shows the
connection between two box frames for the normal 2500 amp bus work.
Splice Plates
Figure 5-5 Multi-Bay Splice Plates