Lab.gruppen PLM+ Series User Manual

9. Operating voltage
PLM+ SERIES Quick Start Guide rev 3.0.2
21
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 specifi ed nominal voltage range but has slightly better
effi ciency at higher voltages. For regions with nominal voltage below 140 V, one could consider connecting the
amplifi er in a three-phase delta or two phase split-phase confi guration.
Note: Following connections applicable only for resulting voltage inside the amplifi ers nominal
voltage range.
Connecting the amplifi er in three phase delta confi guration
In three-phase confi guration where the phases are 120 degrees apart, one can connect three balanced loads in a
delta confi guration. The connection is made between the phases instead of between the neutral and a phase.
Three phase delta confi 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 amplifi er in a split phase confi guration
In two phase split-phase confi guration there are two phases separated by 180 degrees. Connecting between the
phases gives double the line voltage.
Two phase split-phase confi guration
Split phase 100V
100V 100V 200V
L1
Amp
L2N
Amp
Split phase 200V
L1 L2
N
Amp

Lab.gruppen PLM+ Series Specifications

General

Total Output Power	Up to 20, 000W
Networking	Ethernet
DSP	Yes
Input Connectors	XLR
Output Connectors	Neutrik speakON
Dimensions	Varies by model
Weight	Varies by model
Protection	short circuit, DC