KEPCO RA 19-1U Operator Manual - Manual (Page 44)

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RA 19-1U 020413
2.10.4.2 PARALLEL/REDUNDANT OPERATION
Removal of an 1U HSF power supply from a “live” system must be done
only by authorized service personnel after 1U HSF power switch is set to
OFF. Dangerous voltages may be accessible through the open slot after a
power supply is removed.
Identical 1U 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 terminal pair of
the DC OUTPUT terminal blocks is 35 Amperes. Connect (+) to (+) and (–) to (–) at the DC
OUTPUT terminal block (see Figure 2-5).
NOTE: Verify that the sense lines and current share bus are configured per PAR. 2.4.2.
2.10.4.3 SERIES/INDEPENDENT OPERATION
The rack adapter can be used for either independent or series operation of 1U HSF power sup-
plies; 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 1U HSF power supplies are equipped
with blocking diodes which allow series operation without further modification. The RA 19-1U
rack adapter is designed to safely handle a maximum output voltage of 500 Volts.
2.10.4.4 MIXED OPERATION
The design of the RA 19-1U rack adapters permits the user to configure 1U HSF power supplies
for almost any combination of independent, series and parallel operation, both within a single
rack adapter and between different RA 19-1U rack adapters, within the limits of the 1U HSF
operation envelope and the current and voltage ratings specified in PAR.s 2.10.4.2 and
2.10.4.3. 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 Applica-
tions Engineering group for technical assistance.
2.11 REMOVING/REPLACING 1U HSF POWER SUPPLIES
Removal of an 1U HSF power supply from a “live” system must be done
only by authorized service personnel after 1U HSF power switch is set to
OFF. 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 19-1U Rack Adapter. Insert 1U
HSF power supply in selected slot until power supply front panel is flush with rack adapter chas-
sis and secure with two front panel screws on power supply. Do not overtighten these screws:
max. torque is 2 in.-lbs (0.23 N x m).
2.12 SHIPPING
The rack adapter may be shipped with power supplies installed only after the 1U HSF power
supplies have been securely fastened to the rack adapter (PAR. 2.11). Contact Kepco Applica-
tions Engineering if further assistance is required.
WARNING
WARNING