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Agilent Technologies 1989–2002
Agilent 3070 / 79000 Site Preparation
10-125
Chapter 10: Site Preparation – Power Requirements for Older Systems: Tester Power Requirements (Series I/II)
E1131A PDU Electrical Requirements
page 10-127 show the electrical requirements for 3070
Series I and II systems respectively, using the E1131A
PDU. The tables are valid for all power options. The
power requirements are based on the maximum number
of modules and DUT power supplies available.
CAUTION
✸
The voltage drop to the load must not exceed
5-percent of nominal for Single-phase and
3-phase power. With 3-phase options only two
phases are loaded and the third is a without a load.
Verifying the AC Input
Before installing the "mains" drop for an E1131A PDU,
the ac source must be verified to assure that it is
adequate to power the test system.
Sizing the Input Conductors and Breakers
To ensure adequate peak voltage for proper system
power supply operation, a system drop connected to an
ac source with the minimum voltage must be sized to
handle peak current loads with less than a 5-percent
drop between the ac source and the system. Using the
wrong conductor size can cause a larger voltage drop
across the system drop. This could mean that the peak
voltage into the PDU is not sufficient for proper
operation. If the ac source provides more than the
minimum voltage, then the maximum voltage loss
between the source and the system is not as critical.
CAUTION
✸
All power configurations using a neutral are
unbalanced, so there will be neutral current.
Therefore, make the neutral conductor the same
size as the line conductors.
Table 10-28
E1170-80003 power requirements for all power
options
System Type
317X
Full Load Amps (FLA)
29
Breaker Size in Amps
30
SO Cord Wire Size mm
2
(AWG)
6 (10)