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Installation 47
Figure 2-3. 667xA Connection to a 3-Phase Line
Series 668xA Supplies
Line Wiring
The power supply requires a 3-phase power source that provides 7350 VA (6000 W) maximum. The power supply has a
delta input (no neutral connection) and will accept power from either delta (triangle) or wye (star) sources. Two voltage
ranges are available (see "AC Input Ratings" in Table 1-4a). In order to maintain phase current balancing, the power
source should be a dedicated line with only Agilent Technologies Series 668xA supplies drawing current from it . A
disconnect box located near the power supply (see Figure 2-4) is recommended for all installations and is mandatory for
direct-wired installations.
3-phase Mains (delta or wye)
ó AC Safety Disconnect (required for direct-wired installations
ì Series 668xA Power Supply
Figure 2-4. Series 668xA Overall Wiring Diagram.