General Guidelines For Voltage Sense Leads; Electrode Voltage Sensing; Work Voltage Sensing; Negative Electrode Polarity - Lincoln Electric POWER WAVE S500 Service Manual

INSTALLATION
A-11 A-11
GENERAL GUIDELINES FOR VOLTAGE
SENSE LEADS
Sense leads should be attached as close to the weld
as practical and out of the weld current path when pos-
sible. In extremely sensitive applications it may be nec-
essary to route cables that contain the sense leads
away from the electrode and work welding cables.
Voltage sense lead requirements are based on the
weld process. See Table A.2.

ELECTRODE VOLTAGE SENSING

The remote ELECTRODE sense lead (67) is built into
the 5-pin arclink control cable and is always connected
to the wire drive feed plate when a wire feeder is pre-
sent. Enabling or disabling electrode voltage sensing is
application specific and automatically configured by
the active weld mode.
CAUTION
If the auto sense lead feature is disabled and the
weld polarity attribute is improperly configured
extremely high welding outputs may occur.
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WORK VOLTAGE SENSING

While most applications perform adequately by sens-
ing the work voltage directly at the output stud, the use
of a remote work voltage sense lead is recommended
for optimal performance. The remote WORK sense
lead (21) can be accessed through the four-pin voltage
sense connector located on the control panel by using
the K940 Sense Lead Kit. It must be attached to the
work as close to the weld as practical, but out of the
weld current path. For more information regarding the
placement of remote work voltage sense leads, see
Voltage Sensing Considerations for Multiple Arc
Systems.

NEGATIVE ELECTRODE POLARITY

The Power Wave S500 has the ability to automatical-
®
ly sense the polarity of the sense leads. With this fea-
ture there are no set-up requirements for welding with
negative electrode polarity. This feature can be dis-
abled through the Weld Manager Utility (available at
www.powerwavesoftware.com) or through the set up
menu (if a user interface is installed into the power
source).
POWER WAVE ® S500