Tweco A40 CutMaster - Manual (Page 26)

CUTMASTER A40
3-2 INSTALLATION Manual 0-4978
Most units are shipped from the factory with a 230Volt input
power cable wired to the input contactor in the single - phase
configuration. The following illustrations and directions are
for changing that configuration to a different voltage and or to
three - phase operation or back again if a change had already
been made.
A. Cover Removal
1. Remove the upper and lower screws which secure the
cover to the main assembly. Do not loosen the lower
screws inside the cut out slots in the bottom of the
cover.
NOTE
The upper screws and lower screws are not the
same. Do not mix them. The upper screws are
for threading into the plastic of the front and rear
panels. DO NOT use the finer threaded lower
screws for this.
Upper
Screws
Lower
Screws
Lower
Screws
Art # A-08317
Slots
2. Carefully pull the Cover up and away from the unit.
B. Cover Installation
1. Reverse previous procedures for cover installation.
NOTE
When installing the upper screws, attempt to reuse
the original threads. The easiest way to do this is
by turning the screw counter-clockwise until you
feel the threads line up, then begin to turn the screw
clockwise to tighten. Do not over tighten.
C. Input Power Selection
Set the Input Voltage Selection Switch at the rear of the unit
based on the primary input voltage it is connected to. Low is
208/230 VAC and high is 460 VAC.
S
LO
HI
Art # A-08316
D. Quick Guide to Phase Wiring
Art # A-07984_AB
Single-Phase (1ø) and Jumper Settings
L1
L2
L3
L4
Jumper L1 -L4
Jumper
L2-L3
L1
L2
L3
GND
L4
Single Phase Input Power Wiring
Art # A-07983_AB
Three-Phase (3ø) and Jumper Settings
L1
L2
L3
L4
Jumper L1 -L4 L1
L2
L3
GND
L4
Store copper jumper in spare parts box
Three Phase Input Power Wiring
NOTE
There is only one jumper setting that changes
between the single and three phase settings. To
change from single phase to three phase, the cop-
per bus bar jumper connected to L2 and L3 needs
to be removed and placed in a safe place for re-
use. We suggest the spare parts box in the power
supply. See previous illustrations.