Liebert PW017 User Manual

Figure 6.1 Wye- and Delta-connected power-suppy connection diagram
208V to 230V
nominal
380V to 575V
nominal
208V to 575V nominal
PX011
PW011
PX011
PW011
PX018 PW017 PX023
PX029
PW029
Wye with solidly-grounded neutral:
208V Wye, 120V line-to-ground Yes Yes Yes Yes Yes Yes
230V Wye, 133V line-to-ground Yes Yes Yes Yes Yes Yes
380V Wye, 220V line-to-ground Yes Yes Yes Yes Yes Yes
480 V Wye, 277V line-to-ground Yes Yes Yes Yes Yes Yes
575V Wye, 332V line-to-ground
(usessteptransformers)
Yes Yes Yes Yes Yes Yes
Wye with high-resistance (impedance) ground No No No No No No
Delta:
without ground or floating ground Yes No Yes Yes Yes Yes
with corner ground Yes No Yes Yes Yes Yes
with grounded center tap Yes No Yes Yes Yes Yes
Table 6.2 Acceptable power supplies by nominal voltage and model
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).
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Liebert PW017 Specifications

General

Brand	Liebert
Model	PW017
Category	Control Unit
Language	English