Lab.gruppen D Series 80:4L - Manual (Page 11)

10. Grounding
D SERIES Lake Quick Start Guide rev 1.2.0
11
Connecting the amplifier in three phase delta configuration
In three-phase configuration where the phases are 120 degrees apart, one can connect three balanced loads in a
delta configuration. The connection is made between the phases instead of between the neutral and a phase.
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
Three phase delta configuration
Connecting the amplifier in a split phase configuration
In two phase split-phase configuration there are two phases separated by 180 degrees. Connecting between the
phases gives double the line voltage.
Two phase split-phase configuration
10. Grounding
Use correctly-shielded balanced audio input connections to minimize hum and interference.
D Series must be grounded (earthed) with the safety ground pin to the mains distribution system.
NEVER disconnect the earth (ground) pin on the mains cable (AC power cord).
Split phase 100V
100V 100V 200V
L1 Amp L2 N Amp
Split phase 200V
L1 L2
N
Amp