Lincoln Electric IM10022 POWER WAVE AC_DC 1000 SD - Manual (Page 41)

B-11 OPERATION B-11
POWER WAVE ® AC/DC 1000 ® SD
PHASE ADJUSTMENT FOR MULTIPLE
ARC SYSTEMS
Phase
• The phase relationship between the arcs helps to
minimize the magnetic interaction between adjacent
arcs. It is essentially a time offset between the
waveforms of different arcs, and is set in terms of an
angle from 0 to 360°, representing no offset to a full
period offset. The offset of each arc is set
independently with respect to the lead arc of the
system (ARC 1).
Recommendations:
• For balanced waveforms a phase relationship of 90°
should be maintained between adjacent arcs.
• For unbalanced waveforms:
– Avoid switching at same time.
– Break up long periods of unchanged polarity
relative to adjacent arcs.
500
-500
0
Use Phase Relation ship to min imize arc blo w
in multip le arc systems.
(Balanced two arc syst em sh own)
0°
(PULL)
90°
(PUSH/PULL )
180°
(PUSH)
BAD GOOD BAD
ARC 1
ARC 2
Best result s obtained by alternating and equalizing the dur ation of
magnetic for ces between adjacent arcs.
PHASE RELATIONSHIP
TABLE B.1 - PHASE RELATIONSHIP
ARC 1
Lead
ARC 2
Trail
ARC 3
Trail
ARC 4
Trail
ARC 5
Trail
ARC 6
Trail
2 Arc
System
0° 90° X X X X
3 Arc
System
0° 90° 180° X X X
4 Arc
System
0° 90° 180° 270° X X
5 Arc
System
0° 90° 180° 270° 0° X
6 Arc
System
0° 90° 180° 270° 0° 90°