Lincoln Electric IM718 POWER WAVE AC_DC - Manual (Page 12)

A-5 INSTALLATION
POWER WAVE AC/DC
A-5
MULTIPLE UNSYNCHRONIZED ARC SENSE LEAD AND WORK LEAD PLACEMENT GUIDELINES
Work #2
Sense # 2
Power
Source
#2
Power
Source
#1
Arc #1
Arc #2
Work #1
Sense #1
Work # 2
Power
Source
#2
Power
Source
#1
Arc #1
Arc #2
Work # 1
Sense #1
Sense # 2
Current Flow
Power
Source
#1
Power
Source
#2
Work #1
Sense #1
Work #2
Sense #2
Arc #2
Arc #1
Current Flow
fl Current flow from Arc #1
affects sense lead #2
fl Current flow from Arc #2
affects sense lead #1
fl Neither sense lead picks up
the correct work voltage,
causing starting and welding
arc instability.
BAD
fl Sense #1 is only affected by weld
current from Arc #1
fl Sense #2 is only affected by weld
current from Arc #2
fl Due to voltage drops across work piece,
Arc voltage may be low, causing need
for deviation from standard procedures.
BETTER
fl Both Sense leads are out of the current
paths.
fl Both Sense leads detect arc voltage
accurately.
fl No voltage drop between Arc and Sense
lead.
fl Best starts, best arcs, most reliable
results.
BEST
Current Flow