Agilent Technologies N8900 series Operating Manual page 27

AC Mains Connections
208 VAC, 3-phase
5 kW units only
208 VAC, 3-phase
10 kW units only
208 VAC, 3-phase
15 kW units only
Note that either delta-type or Y-type AC mains distribution can be used, provided that the correct line-to-line voltage is
applied.
Phase Balancing with Multiple Units
The previous figures illustrate the phase current distribution. The N8900 power supplies can have from one to three
internal 5.6 kW power blocks, each of which is connected across a separate phase of the 3-phase AC mains. For 5 kW
and 10 kW units this will result in a current imbalance when installing one or two units. Installing three units will result
in a balanced current distribution. For 15 kW units, there is no current imbalance, as all phases draw approximately the
same current.
The following figures illustrate how to install three 5 kW units or three 10 kW units in order to obtain a balanced current
draw on the 3-phase AC mains.
26 Agilent N8900 Series Operating and Service Guide