KEPCO RA 19-4C Operator Manual - Manual (Page 54)

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RA 19-4C 121013
2.11.4.2 PARALLEL/REDUNDANT OPERATION
Removal of an HSF power supply from a “live” system must be done only by
authorized service personnel after HSF power switch is set to OFF. Danger-
ous voltages may be accessible through the open slot after a power supply
is removed.
Identical HSF power supplies can be connected in parallel to provide redundant operation or
increased output current to a common load. Maximum output current for each pair of the DC
OUTPUT terminals is 70 Amperes. Connect the DC OUTPUT terminals of each paralleled
power supply directly to the load. DO NOT DAISY CHAIN load wire conductors (See Figure 2-
7).
Bus bars are available as accessories to make the connections when paralleling adjacent slots
(refer to Table 1-2). When using the bus bars, the output is available from 1/4”-20 studs or pem-
nuts at the busbar links. When using the bus bars, maximum output current is 140 Amperes for
two paralleled units, 210 Amperes for three paralleled units, and 280 Amperes for four paral-
leled units.
NOTE: Verify that the current share bus lines are configured per PAR. and 2.4.2.4.
2.11.4.3 SERIES/INDEPENDENT OPERATION
The rack adapter can be used for either independent or series operation of HSF power supplies;
it is factory configured for independent operation. For series operation refer to PAR. 2.4.3.
2.11.4.4 MIXED OPERATION
The design of the RA 19-4C rack adapters permits the user to configure HSF power supplies for
almost any combination of independent, series and parallel operation, both within a single rack
adapter and between different RA 19-4C rack adapters, within the limits of the HSF operation
envelope and the current and voltage ratings specified in PAR.s 2.11.4.2 and 2.11.4.3. The user
must ensure that the requirements for each configuration stated above are met. If any questions
or problems arise, the user is encouraged to contact the Kepco Applications Engineering group
for technical assistance.
2.12 REMOVING/REPLACING HSF POWER SUPPLIES
Removal of an HSF power supply from a “live” system must be done only by
authorized service personnel after HSF power switch is set to OFF. Danger-
ous voltages may be accessible through the open slot after a power supply
is removed.
Refer to PAR. 2.10 for instructions for removal and replacement of HSF power supplies.
2.13 SHIPPING
The rack adapter may be shipped with power supplies installed only after each HSF power sup-
ply has been securely fastened to the rack adapter using six screws, four at the top and two at
WARNING
WARNING