Lincoln Electric CV ADAPTER IM309-D - Manual (Page 9)

A-2 GENERAL DESCRIPTION
CV ADAPTER
A-2
The CV Adapter consists of a capacitor bank, an elec-
tronic control circuit and switches. The capacitors mod-
ify the dynamic output characteristics to make the
welder suitable for Innershield welding, and the elec-
tronic circuit controls the field current to maintain a
constant voltage output. Two switches are used to
change from CV mode to VV mode. The switches are
interlocked to insure that the capacitors are discon-
nected before the Adapter can be switched to the VV
mode.
All the components are installed in a control box that
attaches to the welder gas tank rail with an adapter
plate. A control cable is used to connect the CV
Adapter to the welder control circuit and the output ter-
minals. A power cable is used to connect the CV out-
put terminal of the Adapter to the welder negative
brushholder. This connection by-passes the series field
for CV operation. A thermostat assembly is sent with
the Adapter model for the SA-200 and SA-250 to pro-
tect the welder if overloaded. Two thermostat assem-
blies are included, one to be used with the SA-200 and
one to be used with the SA-250. The assembly is field
installed in series with the welder negative brushhold-
er and the power cable. The chance of overloading the
SAE machines is much less so no protection is provid-
ed.
The operating schematic is L6922 and the wiring dia-
grams are M14822 and M14726. The assembly is
shown on G1643.