KEPCO BOP 1KW-MG Operator Manual, Firmware Ver.2.01 to 2.37 - Manual (Page 47)

BOP HIPWR 022108
2-13
parallel. Similarly, up to three units can be connected in series to increase the voltage: E
MAX (one
unit)
x N
S
= E
MAX (parallel combination)
where N
S
= number of units in series. In addition, identical
units may be connected in both series and parallel. The 2 X 2 configuration, two parallel
branches of two series-connected power supplies, doubles the output voltage and doubles the
output current of a single unit. The 3 X 2 configuration, two parallel branches of three series-
connected power supplies, triples the output voltage and doubles the output current of a single
unit. Multiple unit configurations require the appropriate Interconnection Kit (see Table 1-5).
For all multiple unit configurations the master reports the system output parameters: voltage and
current; the slaves report the main channel parameter: voltage for voltage mode (series configu-
rations) or current for current mode (parallel configurations).
Additional hex nuts are provided in the interconnection kit for sufficient cable separation so they
can be oriented as needed to fit onto the terminal.
NOTE: Multiple unit configurations require that all individual units be properly calibrated. (Units
shipped from Kepco have been factory-calibrated.) If not, refer to Section 4 to calibrate
the individual units prior to connecting them in parallel or series. Using calibrated units
ensures that the multiple unit configuration is calibrated; calibrating the multiple unit
configuration is neither needed nor possible.
Before powering up the units to be configured, first connect the units in parallel or series. Fig-
ures 2-4 (local sensing) and 2-5 (remote sensing) show the connections for three parallel-con-
nected units; Figures 2-6 (local sensing) and 2-7 (remote sensing) show the connections for
three series-connected units. These figures allow other configurations, e.g., five parallel-con-
nected units or two series connected units, etc. to be easily deduced Figure 2-12 show the con-
nections for a typical 3 X 2 (two parallel branches each consisting of three series-connected
units) configuration, as well as simplified diagrams showing required arrangements for 2 X 2
and 3 X 2 configurations to allow the user .
CAUTION: FOR PARALLEL CONFIGURATIONS, REMOVE LINKS BETWEEN (COM S)
AND (COM OUT) TERMINALS OF ALL SLAVES TO PREVENT DAMAGE TO
THE UNIT AND MAINTAIN SYSTEM ACCURACY.
The following connections are required.
• Power cables
• Sense connections (either local or remote)
• All interconnection cables and terminations required for parallel, series, 2 X 2 or 3 X 2
configurations are supplied in the applicable Interconnection Kit (see Table 1-5 for part
number).
2.8.1 MULTIPLE UNIT SOURCE POWER
Multiple units must all be connected to the same a-c input power source.
CAUTION: CONNECTING MULTIPLE UNITS TO DIFFERENT A-C INPUT SOURCES MAY
DAMAGE THE BOP POWER SUPPLIES AND/OR THE LOAD.
2.8.2 MULTIPLE UNIT PROTECTION
For multiple unit configurations it is necessary to configure the protection so that a fault will shut
down all the interconnected power supplies. Figure 2-8 is a simplified diagram showing typical
interconnections for master/slave configurations.