Lincoln Electric K2803, Operator'S Manual

Page: 22 / 34

English English 19
Figure #6
Remote Sense Lead Connections
Voltage Sensing Overview
The best arc performance occurs when the Power
Wave
®
AC/DC 1000 SD CE has accurate data about the
arc conditions. Depending upon the process, inductance
within the electrode and work cables can influ-ence the
voltage apparent at the studs of the welder, and have a
dramatic effect on performance. To counteract this
negative effect, remote voltage sense leads are used to
improve the accuracy of the arc voltage information
supplied to the control pc board.
There are several different sense lead configurations
that can be used depending on the application. In
extremely sensitive applications it may be necessary to
route cables that contain the sense leads away from the
electrode and work welding cables.
WARNING
If the remote voltage sensing is enabled but the sense
leads are missing, improperly connected, or if the
electrode polarity is improperly configured extremely
high welding outputs may occur.
Electrode Voltage Sensing
The remote ELECTRODE sense lead (67) is built into
the wire feeder control cable (K1785) and accessible at
the wire drive. It should always be connected to the
Contact Assembly where the Weld Cable is connect-ed.
Enabling or disabling electrode voltage sensing is
application specific, and automatically configured
through software.
Work Voltage Sensing
For most applications the use of a remote work volt-age
sense lead is recommended. The Power Wave
®
AC/DC
1000 SD CE is shipped from the factory with the remote
work voltage sense lead enabled. 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 the
section entitled "Voltage Sensing Considerations for
Multiple Arc Systems". The remote WORK sense lead
(21) can be accessed at the four-pin WORK sense lead
connector located on the back panel of the Power Wave
AC/DC 1000 SD CE.
NOTE : All of the machines of a given arc group (Master
and Slaves) will relate to the Voltage Sense Lead of the
Master machine.
WARNING
Never connect the WORK sense lead at two different
locations.
WARNING
ELECTRIC SHOCK can kill.

Do not touch electrically live parts or electrodes with
your skin or wet clothing.

Insulate yourself from the work and ground.

Always wear dry insulating gloves.
Voltage Sensing Considerations for
Multiple Arc Systems
Special care must be taken when more than one arc is
welding simultaneously on a single part. Remote sensing
is required in Multi-arc applications.

Avoid common current paths . Current from
adjacent arcs can induce voltage into each others
current paths that can be misinterpreted by the
power sources, and result in arc interference.

Position the sense leads out of the path of the
weld current.
Especially any current paths common
to adjacent arcs. Current from adjacent arcs can
induce voltage into each others current paths that
can be misinterpreted by the power sources, and
result in arc interference.

For longitudinal applications , connect all work
leads at one end of the weldment, and all of the
work voltage sense leads at the opposite end of the
weldment. Perform welding in the direction away
from the work leads and toward the sense leads.
See figure #7.

For circumferential applications , connect all work
leads on one side of the weld joint, and all of the
work voltage sense leads on the opposite side, such
that they are out of the current path. (see Figure
#8).