ESAB powercut 650 Instruction Manual page 105

SECtIoN 3
The Powercut 650 "CE model" is available as 230 vac single-phase power, or as 400 vac 3 phase.
Note: The 400 vac 3 phase unit is designed to work best when 3 phase input power is used, however with a slight de-rating
of the machine output, the PC-650 can be used on single phase.
Reasons for de-rating:
Input diode stress. 1 phase uses 4 diodes at higher current levels
Buss capacitors will see higher ripple currents
Connecting PC-650 for 208 vac input:
1. Unplug the unit from the primary input power.
2. Remove the left side panel by removing the rear handle and sliding the cover forward from the aluminum frame
rail.
3. Locate the input bridge (IBR) and the two-position terminal block on the left side of the unit towards the rear
panel. Locate the gray wire connected to TB5-2 and to IBR terminal "R". For 208 vac input, disconnect the gray wire
from TB5-2 and then firmly connect it to TB5-1.
4. Locate the output bridge (D1) on the left side towards the front panel. Disconnect and swap leads X2 and X3 from
the main transformer. For 208 vac input, X2 is connected to TB3 and X3 is connected to terminal 3 of D1. Make sure
the connections are firmly tightened.
5. Leave all other wires the same.
6. Reinstall cover by sliding it back into the frame rail. Connect the rear handle and connect the Powercut 650 to the
208 vac input power.
FOR 208 vac MOVE GREY WIRE FROM TB5-2 TO TB5-1, MOVE T1 LEAD X2 TO TB3 AND T1 LEAD X3 TO D1-3.
208 vac
BLACK
BLACK
GRAY
208 V CoNfIgurAtIoN
NotE:
Do Not CHANgE ANY otHEr WIrES.
GRAY
INPUT BRIDGE (IBR)
105
X2 HERE FOR 208 vac INPUT
X3 HERE FOR 208 vac INPUT
INStAllAtIoN