B&K 0-3A, 0-30V Operating Instructions, Connecting Two Power Supplies In Parallel

OPERATING INSTRUCTIONS

CONNECTING TWO POWER SUPPLIES IN PARALLEL	If the current equalizing resistors are not well matched, it is
	preferable that the voltages be slightly unbalanced to achieve
Two power supplies may be connected in parallel to double the	current balance. Be sure that the supplies are adequately
maximum load current. In this configuration the two supplies will	balanced so that both remain in the CV mode.
provide two 0-30 volt output at up to 6 amps (heavier gauge hook-
up leads are advisable). Current equalizing resistors must be used	When connected in parallel and operating in the constant
as shown in Fig. 9. However, the protective current limiting	current mode, the VOLTAGE controls of both supplies should
feature will prevent damage if current is temporarily unbalanced	be preset to the same value. Then when the load is connected, the
during set -up.	CURRENT controls of the two supplies should be adjusted for
	approximately equal current from each unit. Be sure that both
When connected in parallel and operating in the constant	supplies remain in the CC mode.
voltage mode, determine the total load current limit and preset the
current limiting for each power supply to half the total load
current value. Then when the load is connected, set the
VOLTAGE controls on the two power supplies for equal voltage
readings. This should also provide approximately equal current
from each supply. Add the two current meter readings together for
total load current, or connect an external ammeter in series with
the load .

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