KEPCO RA 60 Rev 1, 2, 3 - Manual (Page 21)

RA60 SERIES 090910
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2.6.5 OUTPUT LOAD CONNECTIONS
Load connections to the rack adapters are achieved via the stud pairs located on the rear panel
directly behind each mounting position (see Figure 2-2). Required hardware for attaching output
cables are assembled to the output studs. Wires must be sized according to expected current.
Wire size range is between 22 and 6 GA, depending on the ring lug; torque to 40 lb-in (45 N•M)
maximum. RA 60 rack adapters provide permanent interconnection of the three power supply
positions for parallel/redundant configuration. All three load connections must be used when the
3.3 volt and 5 volt modules are used. RA 62 and RA 63 rack adapters employ a modular bus bar
system to permit a variety of load configurations. The following sections describe the basic out-
put bus bar configurations available with Series RA 60 rack adapters. Additional information
regarding these and other load interface requirements are contained in the HSP operator's man-
ual.
2.6.5.1 PARALLEL/REDUNDANT OPERATION
RA 60 and RA 62 rack adapters provide permanently configured outputs for parallel/redundant
operation: all three positions for RA 60, positions 1 and 2 for RA 62. Load wiring is attached to
the rack adapter at the output studs. Although load wiring can be attached to any single position,
Kepco strongly recommends distributing the load interface evenly among the populated power
supply positions to minimize load sharing error; in no case should load current drawn from any
one terminal exceed 300 Amperes. Consult HSP operator's manual for additional information
regarding parallel/redundant load operation.
2.6.5.2 SERIES/INDEPENDENT OPERATION
RA 63 rack adapters can be used for either independent or series operation of HSP power sup-
plies. For series operation, install a jumper cable from the negative bus bar of one independent
position to the positive bus bar of the adjacent independent position for as many positions as
required. Consult the HSP operator's manual for additional information regarding series opera-
tion. The RA 60 cannot be used for series operation except when connecting consecutive rack
adapters in series; contact Kepco Applications Engineering for additional information.
2.7 SHIPPING
Shipping of the rack adapter is recommended only after the HSP power supplies have been
removed from the rack adapter. Contact Kepco Applications Engineering if further assistance is
required.