Keysight Technologies RP7900 Serie Guide D'utilisation Et De Maintenance page 88

2 Installing the Instrument
A symmetrical arrangement of separate load-wire pairs of equal length connecting to a common
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load point is highly recommended. This provides the best possible dynamic response.
Bus bars can be used to parallel the output terminals in a stacked configuration. Ensure that the
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cross-section area of the bus bars will accommodate the total output current of the stack. Bus
bars can be placed either on the inside or outside of the output terminals. Exposed bus bar sur-
faces must either be enclosed in a cabinet or insulated so that no accidental contact with lethal
voltages can occur.
To maintain the specified load regulation with paralleled units, connect all sense wires directly to
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the load. Twist each sense wire pair. Do not use remote sensing together with local sensing.
Although the following figures show the recommended use of remote sensing, local sensing may be
used if absolutely necessary. With local sensing however, the sharing circuits will work properly only if
the voltage drop measured between the local sense points of any unit to the local sense points of any
other paralleled unit is less than 0.5% of the maximum voltage rating of the units.
Parallel connection example - RP793xA, RP794xA
The cable lengths shown are not to scale. All load cables pairs must be symmetrical and of equal
length for best performance. Size the load cables according to the current rating of the unit. Double
the cables on the 10 kW units so that cable inductance scales with the 5 kW units. Plus cables should
be bundled with minus cables. Although the drawing shows units side by side for clarity, they may also
be stacked on top of each other.
88 Keysight RP7900 Series Operating and Service Guide