Quick Start Guide

9. Operating voltage
PLM+ SERIES Quick Start Guide rev 3.0.2
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9.1. Low voltage country considerations
Although the PLM+ Series has a wide range of operating mains voltage, some considerations can be applicable
for low voltage regions. PLM+ performs well throughout the speci ed nominal voltage range but has slightly better
ef ciency at higher voltages. For regions with nominal voltage below 140 V, one could consider connecting the
ampli er in a three-phase delta or two phase split-phase con guration.
Note: Following connections applicable only for resulting voltage inside the ampli ers nominal
voltage range.
Connecting the ampli er in three phase delta con guration
In three-phase con guration where the phases are 120 degrees apart, one can connect three balanced loads in a
delta con guration. The connection is made between the phases instead of between the neutral and a phase.
Three phase delta con guration
Amp
120V
120V
120V
L1
Amp
L2
L3
Amp
N N
Amp
Amp
Amp
3 phase Y 120V
3 phase delta 208V
208V
208V
208V
L1 L2
L3
Connecting the ampli er in a split phase con guration
In two phase split-phase con guration there are two phases separated by 180 degrees. Connecting between the
phases gives double the line voltage.
Two phase split-phase con guration
Split phase 100V
100V 100V 200V
L1
Amp
L2N
Amp
Split phase 200V
L1 L2
N
Amp