Tweco Merlin 6000GST Master PS - Manual (Page 23)

Manual 0-2652 3-3 INSTALLATION PROCEDURES
C. Opening Power Supply Enclosure
The left side panel (viewed from the front) of the Power Supply
must be removed to make electrical connections and to select
the proper input voltage.
WARNING
Disconnect primary power at the source before
assembling or disassembling power supply, torch
parts, or torch and leads assemblies.
1. Remove the eight screws which secure the left side
panel (viewed from the front) to the Power Supply.
2. Loosen the two bottom screws in the slotted holes.
Left Side Panel
Screws
(10 Places)
A-01528
Figure 3-2 Opening Power Supply
3. Pull the top of the Left Side Panel out and then lift up to
remove the panel from the Power Supply.
3.06 Voltage Selection
The Power Supply can be wired to use input voltages from 200
- 575 VAC. Power Supply is factory-wired for 380-460 VAC,
three-phase input. Voltage selection is accomplished by switch-
ing busbar connections on the input voltage terminal board
inside the Power Supply.
1. Locate the input voltage terminal board on the left side
of the power supply.
Input Voltage
Terminal Board
L1
L2
L3
Busbars
A-01828
Extra Busbar
Storage Location
Figure 3-3 Input Voltage Terminal Board Location
NOTE
Extra busbars are attached (stored) to the top
side of the power transformer assembly.
2. Check the busbar configuration on the input voltage
terminal board . The busbar configuration must corre-
spond with the available line voltage per the following
figure and the label inside the unit: