Tweco 75XL Plus PAK Master - Manuel (Page 21)

Manual 0-2807 3-3 INSTALLATION
3.06 Input Voltage Selection
NOTE
For power supplies to use 575 VAC input power,
the unit must be setup for 460V three-phase op-
eration and the 575V Transformer Accessory must
be installed.
The Power Supply has three voltage settings; 208/230/
240VAC, 380/415VAC, or 460VAC. Power Supplies are
factory-wired for 230V single-phase or 460VAC three-
phase input depending on the order. Input voltage se-
lection is accomplished by switching a wire harness con-
nector inside the Power Supply. Also, a jumper wire must
be properly installed depending on the input used.
WARNING
Disconnect primary power at the source before as-
sembling or disassembling the power supply, torch
parts, or torch and leads assemblies.
1. Move the power selection plug to the desired in-
put connection for 208/230/240V, 380/415V, or
460V operation per the label attached to the panel.
Voltage Selection
Connector
380/415 Volts
460 Volts
208/230/240 Volts
A-02743
Voltage Selection
Label
Figure 3-2 Input Voltage Selection
2. When changing the input voltage selection the
single-phase jumper wire may need to be
changed. The jumper wire is located on the two
L3 terminal lugs (storage position) of the input
contactor. Checked for proper connections as
follows:
• For all three-phase input operations leave the
single-phase jumper wire connected between
the two L3 terminal lugs.
• For all single-phase input operations the single-
phase jumper wire must be installed on the
input contactor as described in Section 3.07 for
Single-Phase Operation.
3.07 Primary Input Power Cable
Connections
Units ordered as 230V, single-phase, will have a six foot
power input cable and plug factory installed. For all other
units, a cable must be provided by the end user. Recom-
mended cable sizes are specified in Appendix I.
1. Route the primary power cable through the strain
relief fitting in the rear panel of the Power Sup-
ply and tighten strain relief screws.
AC Input Power
Cable Strain Relief
AC Input
Power Cable A-00912
Figure 3-3 AC Input Power Cable Strain Relief
2. Connect the input cable inside the Power Supply
for the type of operation as follows:
Three-Phase Operation
Three-phase operation requires a 3-conductor cable
with ground.
a. Locate the ground stud and remove the top
nut and washer.
b. Install a lug terminal on the ground wire.
c. Place the ground wire onto the ground stud
and secure with the nut and washer.
d. Insert the other three wires into the L1, L2, and
L3 terminals on the contactor.
e. Tighten all set screws.