Lincoln Electric POWER WAVE 11124 - Manual (Page 49)

B-11 OPERATION B-11
MULTIPLE ARC AC ADJUSTMENTS FOR
SYSTEMS EQUIPPED WITH K2282-1
SYSTEM INTERFACE
Phase
The phase relationship between the arcs helps to
minimize the magnetic interaction between adjacent
arcs. It is essentially a time offset between the wave-
forms 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.
ARC 1 ARC2 ARC3 ARC 4
2 Arc System 0° 90° X X
3 Arc System 0° 90° 180° X
4 Arc System 0° 90° 180° 270°
• For unbalanced waveforms:
– Avoid switching at same time
– Break up long periods of unchanged polarity
relative to adjacent arcs
POWER WAVE® AC/DC 1000
Phase Relationship
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.