System Architecture - Pacific AMX series Operation Manual

SECTION 4 OPERATION

4.6.1 SYSTEM ARCHITECTURE

The AMX-Series Power Source output can be configured for single, split, and three phase voltage forms.
Figure 4.6.1 is a simplified block diagram of the possible output architectures. Only the direct-coupled output
forms are shown. All of the forms can be supplied with transformers to raise the output voltage level.
The 1 PHASE mode of operation is a one vector output form. All of the power amplifier PCB's are connected
in parallel to form one output vector. The standard, direct-coupled version of this output form is capable of 0-
135 VAC (0-150 VAC for the Models 112, 312, and 125-AMX). The voltage ranges of the various
l-n l-n
transformer output forms are: VR1.5 - 0 to 204 VAC (Models 105, 108, 140, 305, 308, 345, 360, 390, and
l-n
3120-AMX), VR2.0 - 0 to 273 VAC (Models 105, 108, 140, 305, 308, 345, 360, 390, and 3120-AMX), and
l-n
VR2.5 - 0 to 341 VAC (Models 105, 108, 140, 160, 305, 308, 360, 390, and 3120-AMX).
l-n
The 2 PHASE mode of operation is a two vector output form where the vectors are separated by 180° and equal
in amplitude. This output form uses power amplifiers in pairs, one for each vector. The load can be attached
from either line to neutral, line to line, or a combination of both (line to line only in the case of the Model 125-
AMX). The standard, direct-coupled version of this output form has a voltage range of 0-270 VAC (0-300
l-l
VAC for the Models 112, 312, and 125-AMX). The voltage ranges of the various transformer output forms
l-l
are: VR1.5 - 0 to 408 VAC (Models 105, 108, 140, 305, 308, 345, 360, 390, and 3120-AMX), VR2.0 - 0 to
l-l
546 VAC (Models 105, 108, 140, 160, 305, 308, 345, 360, 390, and 3120-AMX), and VR2.5 - 0 to 600 VAC
l-l l-l
(Models 105, 108, 140, 305, 308, 345, 360, 390, and 3120-AMX). Note that in the case of the Models 305,
308, 330, 345, 360, 390, and 3120-AMX, only two of the three power amplifiers are connected--limiting these
systems to producing only two-thirds of rated output power.
NOTE: The AMX-Series Power Sources do not support voltages in excess of 600 VAC due to controller,
rms
safety, and spacing limitations. Attempting to defeat the inherent programming limitations of the controller to
obtain higher voltages is strongly recommended against.
The 3 PHASE mode of operation is a three vector output form with vectors normally separated by 120°. Power
amplifiers are supplied in groups of three with this output form and are WYE connected. A WYE load is
connected across the A, B, C, and Neutral terminals of the output terminal block. This output form will also
drive DELTA loads. DELTA loads are simply connected across the A, B, and C terminals of the output
terminal block with the Neutral terminal not connected. The standard, direct-coupled version of this form has
an output voltage range of 0 to 135/234 VAC (0 to 150/260 VAC for the Model 312-AMX). The voltage
ranges of the various transformer output forms are: VR1.5 - 0 to 204/353 VAC (Models 305, 308, 345, 360,
390, and 3120-AMX), VR2.0 - 0 to 273/473 VAC (Models 305, 308, 345, 360, 390, and 3120-AMX), and
VR2.5 - 0 to 341/591 VAC (Models 305, 308, 345, 360, 390, and 3120-AMX).
97