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Agilent Technologies 1989–2002
Agilent 3070 / 79000 Site Preparation
6-11
Chapter 6: Site Preparation – Power Requirements: Is PDU Re-wiring Necessary?
Is PDU Re-wiring
Necessary?
Introduction
Re-wiring the PDU is necessary only if you are
connecting it to a different power
configuration
than it
was wired for — not merely a different voltage, but a
different configuration (see
). See the
examples below.
Suppose your system’s PDU is wired for 220 volts wye
(option 3PY) and you want to connect it to:
1
208 volts wye (option 3PY)
No re-wiring is necessary; this is merely a voltage
change and all internal components will handle 200
to 240 volts.
2
220 volts delta (option 3PD)
No re-wiring is necessary; options 3PY and 3PD
have the same internal wiring.
3
220 volts wye with neutral (opt 3PN)
Re-wiring is necessary
because the internal circuits
are wired phase-to-neutral and the internal
components would be under-powered. Whenever you
switch from a non-neutral to a neutral configuration,
or vice versa, you must re-wire the PDU.
If you determine that re-wiring the PDU is necessary, go
to
Table 6-3
Power Options / Configurations
Power
Options
Configuration Description
1
1. Regardless of the power option, the internal system compo-
nents always operates at 200–240 volts.
3PD
200–240 volts 3-phase Delta
Includes 200V, 220V, 230V, 240V
3PY
208–220 volts 3-phase Wye
Includes 208V, 220V
3PN
380–415 volts 3-phase Wye with Neutral
Includes 380V, 400V, 415V
