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GENERAL DESCRIPTION
A-1
CV ADAPTER
PRODUCT PURPOSE
The CV Adapter can be connected to certain variable
voltage water-cooled engine welders to provide con-
stant voltage output recommended for welding .068
and .072 NR-232, .068 and 5/64 NR-211, 5/64 NS-3M,
Innershield electrodes within the current rating of the
machine used. The unit can also be used for some
other open arc processes depending on the application
and process to be used. With the CV Adapter installed,
the welder can be easily set to operate in either the CV
mode or the standard VV mode.
Three models have been available, one for SA-200 and SA-
250 welders, one for SAE-300, SAE-400 and SAE-400
WELD’N AIR engine welders and one for SAE-350 engine
welders.
The LN-15, LN-22 and LN-25 wire feeder is recom-
mended for Innershield welding with the CV Adapter
because no terminal strip is provided for wire feeder
control wires, and there is no output contactor. (The
K279 contactor voltage control option cannot be used
with the LN-15,LN-22, OR LN-25 in this application.)
An LN-7 can be used with an SA-250, SAE-350, SAE-
300, SAE-400 or SAE-400 WELD’N AIR that has AC
auxiliary power provided a K240 Contactor Kit is con-
nected between the LN-7 and the power source.
The voltage control range of the CV Adapter is 15 to
35 volts at the welder current rating. The table gives a
summary of CV outputs when the Adapter is connect-
ed.
NOTE: WHEN ENGINE WELDER IS SUPPLIED
WITH A METER, THE AMMETER DOES NOT WORK
WHEN WELDING IN THE CV MODE.
The CV Adapter will fit any of the following engine
welders:
• SA-200 with electronic idler and FDW DC exciter
(above Code 7240)
• Classic I and II (Below Code 10066)
• SA-250 above Code 7826 and Below code 10066.
• SAE-300 and SAE-400 without Remote Control
option and with 115V FDW DC exciter, 254 alterna-
tor exciter, or 214 alternator exciter (above Code
7160) and all SAE-400 WELD’N AIR— NOTE: K-385
CV Adapter below Code 8785 will not operate prop-
erly on SAE engine welders above Code 8812.
• SAE-350 — Factory installed only.
• International
350-SA —(Below Code 10066) All machines or fac-
tory installed.
450-SAE — Factory installed only.
Estimated time for field installation of the CV Adapter to
welder is 2 to 3 hours.
Max. Output At
Rating At 60% 35% Duty
Machine Duty Cycle Cycle Comments
SA-200 200 amp 250 amp Many procedures
at 35V at 30V limited by
current rating
SA-250 250 amp 310 amp AC auxiliary power
at 35V at 35V is reduced 25%
when in CV mode
SAE-300 300 amp 375 amp Polarity switch
at 35V at 35V is disconnected
SAE-400 & 400 amp 500 amp Polarity switch
SAE-400 at 35V at 35V is disconnected
WELD’N AIR
SAE-350 350 amp 435 amp No polarity switch
at 35V at 35V installed
Inter- AC auxiliary power
national is reduced
350-SA — 310 amp 25% when in CV
at 35V mode
450-SAE — 435 amp No polarity switch
at 35V installed