Parallel Effects on Load Regulation
The design of the RPS has been optimized for parallel operation. Therefore, the effect of paralleled
units on the specifications has been kept to a minimum. When units are paralleled, there is no
degradation of any specification other than the load regulation specification. All other specifications,
including output noise, programming accuracy, readback accuracy, and transient response are
unaffected by paralleled operation.
With two or more units are paralleled with current sharing enabled, there will be a small additional
voltage regulation effect. The worst case additional voltage regulation effect is as follows:
∆V
OUT(WORST_CASE)
=0.003%(V
RATING
)
To determine the total output voltage regulation effect for a specific unit, you must add the worst-case
value from the following table to the CV load regulation specification for each paralleled unit. These
are the worst-case values for each unit based on its voltage rating.
V
RATED
∆V
OUT(WORST_CASE)
V
RATED
∆V
OUT(WORST_CASE)
500 V 15 mV 950 V 28.5 mV
Example: You have two 500 V units connected in parallel. The load regulation effect due to current
sharing is 15 mV from the table above. The CV load regulation specification is 30 mV. Therefore, the
total output voltage regulation effect is 30 mV + 15 mV, or 45 mV.
Keysight RP7900 Series Operating and Service Guide 117
4 Using the Regenerative Power System
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