Liebert PX018 Installer's/User's Manual page 53

Figure 6.1 Wye- and Delta-connected power-suppy connection diagram
Table 6.2 Acceptable power supplies by nominal voltage and model
Wye with solidly-grounded neutral:
208V Wye, 120V line-to-ground
230V Wye, 133V line-to-ground
380V Wye, 220V line-to-ground
480 V Wye, 277V line-to-ground
575V Wye, 332V line-to-ground
(uses step transformers)
Wye with high-resistance (impedance) ground
Delta
:
without ground or floating ground
with corner ground
with grounded center tap
NOTE: A 3-Phase, Wye-connected system consists of 3 hot lines or phases (commonly referred to as
X, Y, Z,) and a ground wire, for a total of 4 wires in a power-distribution cable. The lower voltage in each
case is the country's standard utilization voltage and is measured Line-to-Neutral, while the higher
voltage is measured Line-to-Line. The Line-to-Line voltage is always 1.732 times higher than the Line-
to-Neutral voltage in a Wye-configured 3-Phase system.
A 3-Phase, Delta-connected system consists of 3 hot lines (commonly referred to as phase A, phase B,
phase C,) and a ground wire for a total of 4 wires in a power-distribution cable. These phase voltages
are measured Line-to-Line and are typically the country's standard utilization voltage. Because there is
no neutral line in a Delta-connected system, there is no Line-to-Neutral voltage! However, the line
current in a Delta-connected system is 1.732 times the phase current supplied to the load(s).
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |
208V to 230V 380V to 575V
nominal nominal
PX011 PX011
PW011 PW011
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No No
Yes No
Yes No
Yes No
208V to 575V nominal
PX029
PX018 PW017 PX023
PW029
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
No No No No
Yes Yes Yes Yes
Yes Yes Yes Yes
Yes Yes Yes Yes
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