KEPCO RA 19-7B Operator Manual - Manual (Page 37)

RA 19-7B 011409
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2.8.4.1 PARALLEL/REDUNDANT OPERATION
Removal of an HSF power supply from a “live” system must be done only by
authorized service personnel. Dangerous voltages may be accessible
through the open slot after a power supply is removed.
HSF power supplies having identical voltage ratings can be connected in parallel to provide
redundant operation or increased output current to a common load. Maximum output current for
each terminal pair of the DC OUTPUT terminal blocks is 30 Amperes. Connect (+) to (+) and (–
) to (–) at the DC OUTPUT terminal block (see Figure 2-5).
NOTE: Verify that Sense leads are connected (see PAR. 2.4.2.3). An external bus is required
where current exceeds 30 Amperes.
2.8.4.2 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 using local sensing. To select remote sensing,
refer to PAR. 2.4.1.3.
For series operation, connect (+) and (–) terminals at the DC OUTPUT terminal block of power
supplies to be connected in series (see Figure 2-11). The HSF power supplies are equipped
with blocking diodes which allow series operation without further modification. The RA 19-(X)B
Series rack adapter is designed to safely handle a maximum output voltage of 500 Volts.
2.8.4.3 MIXED OPERATION
The design of the Series RA 19-(X)B 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-(X)B rack adapters, within the limits of the HSF
operation envelope and the current and voltage ratings specified in PAR.s 2.8.4.1 and 2.8.4.2.
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 Engi-
neering group for technical assistance.
2.9 INSTALLING HSF POWER SUPPLIES
Removal of an HSF power supply from a “live” system must be done only by
authorized service personnel. Dangerous voltages may be accessible
through the open slot after a power supply is removed.
Refer to Figure 1-1, for proper slot positions applicable to the RA 19-7B Rack Adapter. Insert
HSF power supply in selected slot until power supply front panel is flush with rack adapter chas-
sis and secure with two phillips screws on power supply.
2.10 SHIPPING
The rack adapter may be shipped with power supplies installed only after the HSF power sup-
plies have been securely fastened to the rack adapter (PAR. 2.9). Contact Kepco Applications
Engineering if further assistance is required.
WARNING
WARNING